./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Ackermann02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/Ackermann02.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 20c02b81d1b1bc312ccc75d6e9b31c6252d69e8a6e2560afe3a2a95a3e53102a --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 07:27:10,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 07:27:10,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 07:27:10,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 07:27:10,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 07:27:10,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 07:27:10,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 07:27:10,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 07:27:10,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 07:27:10,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 07:27:10,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 07:27:10,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 07:27:10,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 07:27:10,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 07:27:10,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 07:27:10,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 07:27:10,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 07:27:10,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 07:27:10,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 07:27:10,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 07:27:10,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 07:27:10,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 07:27:10,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 07:27:10,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 07:27:10,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 07:27:10,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 07:27:10,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 07:27:10,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 07:27:10,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 07:27:10,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 07:27:10,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 07:27:10,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 07:27:10,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 07:27:10,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 07:27:10,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 07:27:10,624 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 07:27:10,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 07:27:10,625 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 07:27:10,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 07:27:10,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 07:27:10,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 07:27:10,627 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-02-18 07:27:10,649 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 07:27:10,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 07:27:10,657 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 07:27:10,658 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 07:27:10,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 07:27:10,658 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 07:27:10,659 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 07:27:10,659 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 07:27:10,659 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 07:27:10,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 07:27:10,660 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 07:27:10,660 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 07:27:10,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 07:27:10,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 07:27:10,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 07:27:10,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 07:27:10,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 07:27:10,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 07:27:10,661 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-02-18 07:27:10,661 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 07:27:10,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 07:27:10,662 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 07:27:10,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 07:27:10,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 07:27:10,662 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 07:27:10,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 07:27:10,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 07:27:10,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 07:27:10,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 07:27:10,663 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 07:27:10,663 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 07:27:10,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 07:27:10,664 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 07:27:10,664 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 07:27:10,664 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 07:27:10,664 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 07:27:10,664 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 07:27:10,664 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20c02b81d1b1bc312ccc75d6e9b31c6252d69e8a6e2560afe3a2a95a3e53102a [2023-02-18 07:27:10,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 07:27:10,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 07:27:10,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 07:27:10,875 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 07:27:10,875 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 07:27:10,876 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann02.c [2023-02-18 07:27:11,870 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 07:27:12,067 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 07:27:12,067 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann02.c [2023-02-18 07:27:12,071 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b377a5be9/98bfb00638b64f068441163eb85bf14e/FLAG1c0fb1d92 [2023-02-18 07:27:12,476 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b377a5be9/98bfb00638b64f068441163eb85bf14e [2023-02-18 07:27:12,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 07:27:12,478 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 07:27:12,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 07:27:12,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 07:27:12,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 07:27:12,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@394d6393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12, skipping insertion in model container [2023-02-18 07:27:12,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 07:27:12,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 07:27:12,577 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann02.c[1157,1170] [2023-02-18 07:27:12,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 07:27:12,585 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 07:27:12,596 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann02.c[1157,1170] [2023-02-18 07:27:12,596 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 07:27:12,604 INFO L208 MainTranslator]: Completed translation [2023-02-18 07:27:12,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12 WrapperNode [2023-02-18 07:27:12,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 07:27:12,606 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 07:27:12,606 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 07:27:12,606 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 07:27:12,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,614 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,624 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2023-02-18 07:27:12,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 07:27:12,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 07:27:12,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 07:27:12,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 07:27:12,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,649 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 07:27:12,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 07:27:12,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 07:27:12,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 07:27:12,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 07:27:12,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:12,674 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 07:27:12,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 07:27:12,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 07:27:12,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 07:27:12,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 07:27:12,698 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2023-02-18 07:27:12,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2023-02-18 07:27:12,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 07:27:12,738 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 07:27:12,739 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 07:27:12,852 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 07:27:12,872 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 07:27:12,873 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-18 07:27:12,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 07:27:12 BoogieIcfgContainer [2023-02-18 07:27:12,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 07:27:12,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 07:27:12,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 07:27:12,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 07:27:12,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 07:27:12" (1/3) ... [2023-02-18 07:27:12,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c712ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 07:27:12, skipping insertion in model container [2023-02-18 07:27:12,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (2/3) ... [2023-02-18 07:27:12,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c712ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 07:27:12, skipping insertion in model container [2023-02-18 07:27:12,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 07:27:12" (3/3) ... [2023-02-18 07:27:12,879 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann02.c [2023-02-18 07:27:12,890 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 07:27:12,890 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-02-18 07:27:12,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 07:27:12,950 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@55a80418, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 07:27:12,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-02-18 07:27:12,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 07:27:12,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 07:27:12,959 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:12,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:12,961 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:12,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:12,969 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2023-02-18 07:27:12,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:12,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995752891] [2023-02-18 07:27:12,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:12,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:13,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:13,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995752891] [2023-02-18 07:27:13,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995752891] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 07:27:13,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 07:27:13,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 07:27:13,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256155114] [2023-02-18 07:27:13,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:27:13,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 07:27:13,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:13,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 07:27:13,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 07:27:13,225 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, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:13,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:13,324 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2023-02-18 07:27:13,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 07:27:13,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 07:27:13,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:13,336 INFO L225 Difference]: With dead ends: 73 [2023-02-18 07:27:13,336 INFO L226 Difference]: Without dead ends: 60 [2023-02-18 07:27:13,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 07:27:13,341 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 61 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:13,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 113 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 07:27:13,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-18 07:27:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2023-02-18 07:27:13,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 42 states have internal predecessors, (53), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 07:27:13,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2023-02-18 07:27:13,387 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 8 [2023-02-18 07:27:13,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:13,388 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2023-02-18 07:27:13,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:13,388 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2023-02-18 07:27:13,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 07:27:13,389 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:13,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:13,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 07:27:13,389 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:13,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:13,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2023-02-18 07:27:13,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:13,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357302539] [2023-02-18 07:27:13,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:13,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:13,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:13,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357302539] [2023-02-18 07:27:13,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357302539] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 07:27:13,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 07:27:13,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 07:27:13,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044276143] [2023-02-18 07:27:13,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:27:13,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 07:27:13,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:13,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 07:27:13,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 07:27:13,442 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:13,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:13,516 INFO L93 Difference]: Finished difference Result 101 states and 139 transitions. [2023-02-18 07:27:13,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 07:27:13,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-18 07:27:13,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:13,519 INFO L225 Difference]: With dead ends: 101 [2023-02-18 07:27:13,519 INFO L226 Difference]: Without dead ends: 95 [2023-02-18 07:27:13,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 07:27:13,520 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:13,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 89 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 07:27:13,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-18 07:27:13,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2023-02-18 07:27:13,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.540983606557377) internal successors, (94), 70 states have internal predecessors, (94), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 07:27:13,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2023-02-18 07:27:13,534 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 9 [2023-02-18 07:27:13,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:13,534 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2023-02-18 07:27:13,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:13,535 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2023-02-18 07:27:13,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 07:27:13,535 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:13,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:13,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 07:27:13,536 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:13,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2023-02-18 07:27:13,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:13,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258554415] [2023-02-18 07:27:13,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:13,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:13,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:13,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258554415] [2023-02-18 07:27:13,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258554415] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 07:27:13,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 07:27:13,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 07:27:13,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642243642] [2023-02-18 07:27:13,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:27:13,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 07:27:13,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:13,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 07:27:13,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 07:27:13,637 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:13,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:13,686 INFO L93 Difference]: Finished difference Result 114 states and 154 transitions. [2023-02-18 07:27:13,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 07:27:13,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-18 07:27:13,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:13,688 INFO L225 Difference]: With dead ends: 114 [2023-02-18 07:27:13,688 INFO L226 Difference]: Without dead ends: 110 [2023-02-18 07:27:13,688 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 [2023-02-18 07:27:13,689 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 49 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:13,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 93 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 07:27:13,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-18 07:27:13,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2023-02-18 07:27:13,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.472972972972973) internal successors, (109), 83 states have internal predecessors, (109), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-18 07:27:13,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 138 transitions. [2023-02-18 07:27:13,700 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 138 transitions. Word has length 9 [2023-02-18 07:27:13,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:13,701 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 138 transitions. [2023-02-18 07:27:13,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:13,701 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 138 transitions. [2023-02-18 07:27:13,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 07:27:13,701 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:13,701 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:13,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 07:27:13,702 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:13,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:13,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2023-02-18 07:27:13,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:13,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281835211] [2023-02-18 07:27:13,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:13,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:13,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:13,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281835211] [2023-02-18 07:27:13,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281835211] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 07:27:13,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 07:27:13,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 07:27:13,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474575324] [2023-02-18 07:27:13,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:27:13,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 07:27:13,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:13,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 07:27:13,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 07:27:13,729 INFO L87 Difference]: Start difference. First operand 102 states and 138 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:13,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:13,758 INFO L93 Difference]: Finished difference Result 102 states and 138 transitions. [2023-02-18 07:27:13,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 07:27:13,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 07:27:13,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:13,759 INFO L225 Difference]: With dead ends: 102 [2023-02-18 07:27:13,759 INFO L226 Difference]: Without dead ends: 100 [2023-02-18 07:27:13,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 07:27:13,761 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:13,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 45 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 07:27:13,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-18 07:27:13,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-18 07:27:13,769 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) [2023-02-18 07:27:13,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2023-02-18 07:27:13,770 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 10 [2023-02-18 07:27:13,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:13,770 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2023-02-18 07:27:13,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:13,770 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2023-02-18 07:27:13,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 07:27:13,771 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:13,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:13,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 07:27:13,771 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:13,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:13,772 INFO L85 PathProgramCache]: Analyzing trace with hash -796703108, now seen corresponding path program 1 times [2023-02-18 07:27:13,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:13,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297733919] [2023-02-18 07:27:13,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:13,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:13,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:13,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297733919] [2023-02-18 07:27:13,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297733919] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 07:27:13,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 07:27:13,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 07:27:13,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370192303] [2023-02-18 07:27:13,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:27:13,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 07:27:13,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:13,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 07:27:13,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 07:27:13,807 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:13,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:13,847 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2023-02-18 07:27:13,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 07:27:13,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 11 [2023-02-18 07:27:13,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:13,848 INFO L225 Difference]: With dead ends: 109 [2023-02-18 07:27:13,848 INFO L226 Difference]: Without dead ends: 108 [2023-02-18 07:27:13,848 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 [2023-02-18 07:27:13,849 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 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 [2023-02-18 07:27:13,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 92 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 07:27:13,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-18 07:27:13,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2023-02-18 07:27:13,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 81 states have internal predecessors, (97), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-18 07:27:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2023-02-18 07:27:13,858 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 11 [2023-02-18 07:27:13,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:13,859 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2023-02-18 07:27:13,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:13,859 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2023-02-18 07:27:13,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 07:27:13,859 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:13,860 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:13,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 07:27:13,860 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:13,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:13,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645175, now seen corresponding path program 1 times [2023-02-18 07:27:13,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:13,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908914721] [2023-02-18 07:27:13,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:13,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:13,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:13,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908914721] [2023-02-18 07:27:13,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908914721] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 07:27:13,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 07:27:13,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 07:27:13,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307536840] [2023-02-18 07:27:13,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:27:13,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 07:27:13,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:13,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 07:27:13,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 07:27:13,884 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:13,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:13,913 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2023-02-18 07:27:13,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 07:27:13,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-18 07:27:13,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:13,914 INFO L225 Difference]: With dead ends: 168 [2023-02-18 07:27:13,914 INFO L226 Difference]: Without dead ends: 97 [2023-02-18 07:27:13,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 07:27:13,916 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:13,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 88 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 07:27:13,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-18 07:27:13,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2023-02-18 07:27:13,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.295774647887324) internal successors, (92), 78 states have internal predecessors, (92), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-18 07:27:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2023-02-18 07:27:13,923 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 15 [2023-02-18 07:27:13,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:13,924 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2023-02-18 07:27:13,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:13,924 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2023-02-18 07:27:13,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 07:27:13,925 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:13,925 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:13,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-18 07:27:13,925 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:13,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:13,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645399, now seen corresponding path program 1 times [2023-02-18 07:27:13,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:13,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125223123] [2023-02-18 07:27:13,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:13,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:13,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:13,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125223123] [2023-02-18 07:27:13,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125223123] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:13,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022603112] [2023-02-18 07:27:13,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:13,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:13,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:13,974 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:13,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 07:27:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:14,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 07:27:14,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:14,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:14,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022603112] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:14,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:14,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-18 07:27:14,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424762050] [2023-02-18 07:27:14,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:14,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 07:27:14,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:14,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 07:27:14,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-18 07:27:14,109 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:14,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:14,289 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2023-02-18 07:27:14,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 07:27:14,289 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-18 07:27:14,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:14,291 INFO L225 Difference]: With dead ends: 274 [2023-02-18 07:27:14,291 INFO L226 Difference]: Without dead ends: 272 [2023-02-18 07:27:14,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2023-02-18 07:27:14,292 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 249 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:14,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 163 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 07:27:14,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-02-18 07:27:14,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2023-02-18 07:27:14,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 182 states have (on average 1.2637362637362637) internal successors, (230), 189 states have internal predecessors, (230), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-18 07:27:14,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2023-02-18 07:27:14,325 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 15 [2023-02-18 07:27:14,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:14,326 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2023-02-18 07:27:14,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:14,326 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2023-02-18 07:27:14,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 07:27:14,327 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:14,327 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:14,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:14,531 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 [2023-02-18 07:27:14,532 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:14,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:14,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1422985811, now seen corresponding path program 1 times [2023-02-18 07:27:14,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:14,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668149336] [2023-02-18 07:27:14,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:14,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:14,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:14,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:14,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668149336] [2023-02-18 07:27:14,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668149336] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:14,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763440161] [2023-02-18 07:27:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:14,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:14,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:14,608 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:14,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 07:27:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:14,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 07:27:14,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:14,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 07:27:14,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763440161] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 07:27:14,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 07:27:14,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-02-18 07:27:14,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358530049] [2023-02-18 07:27:14,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:27:14,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 07:27:14,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:14,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 07:27:14,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-02-18 07:27:14,677 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2023-02-18 07:27:14,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:14,741 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2023-02-18 07:27:14,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 07:27:14,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 16 [2023-02-18 07:27:14,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:14,746 INFO L225 Difference]: With dead ends: 328 [2023-02-18 07:27:14,746 INFO L226 Difference]: Without dead ends: 327 [2023-02-18 07:27:14,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-02-18 07:27:14,748 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 41 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:14,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 96 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 07:27:14,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-02-18 07:27:14,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2023-02-18 07:27:14,766 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) [2023-02-18 07:27:14,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2023-02-18 07:27:14,768 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 16 [2023-02-18 07:27:14,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:14,769 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2023-02-18 07:27:14,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2023-02-18 07:27:14,769 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2023-02-18 07:27:14,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 07:27:14,770 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:14,770 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:14,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:14,974 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 [2023-02-18 07:27:14,974 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:14,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:14,975 INFO L85 PathProgramCache]: Analyzing trace with hash 848163410, now seen corresponding path program 1 times [2023-02-18 07:27:14,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:14,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151154412] [2023-02-18 07:27:14,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:14,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:15,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:15,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151154412] [2023-02-18 07:27:15,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151154412] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:15,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963722061] [2023-02-18 07:27:15,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:15,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:15,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:15,040 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:15,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 07:27:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:15,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 07:27:15,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:15,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:15,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963722061] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:15,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:15,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-18 07:27:15,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235041100] [2023-02-18 07:27:15,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:15,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 07:27:15,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:15,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 07:27:15,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-18 07:27:15,106 INFO L87 Difference]: Start difference. First operand 293 states and 373 transitions. Second operand has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:15,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:15,286 INFO L93 Difference]: Finished difference Result 591 states and 792 transitions. [2023-02-18 07:27:15,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 07:27:15,287 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 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 19 [2023-02-18 07:27:15,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:15,289 INFO L225 Difference]: With dead ends: 591 [2023-02-18 07:27:15,289 INFO L226 Difference]: Without dead ends: 590 [2023-02-18 07:27:15,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2023-02-18 07:27:15,290 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 156 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:15,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 203 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 07:27:15,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-02-18 07:27:15,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 521. [2023-02-18 07:27:15,346 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) [2023-02-18 07:27:15,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2023-02-18 07:27:15,348 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 19 [2023-02-18 07:27:15,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:15,348 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2023-02-18 07:27:15,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:15,348 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2023-02-18 07:27:15,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 07:27:15,369 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:15,369 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:15,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:15,569 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 [2023-02-18 07:27:15,570 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:15,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:15,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2023-02-18 07:27:15,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:15,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982749872] [2023-02-18 07:27:15,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:15,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:15,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:15,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 07:27:15,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:15,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982749872] [2023-02-18 07:27:15,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982749872] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:15,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321985625] [2023-02-18 07:27:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:15,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:15,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:15,654 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:15,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 07:27:15,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:15,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 07:27:15,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 07:27:15,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 07:27:15,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321985625] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 07:27:15,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 07:27:15,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2023-02-18 07:27:15,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504000743] [2023-02-18 07:27:15,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:27:15,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 07:27:15,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:15,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 07:27:15,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-02-18 07:27:15,705 INFO L87 Difference]: Start difference. First operand 521 states and 649 transitions. Second operand has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 07:27:15,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:15,761 INFO L93 Difference]: Finished difference Result 562 states and 696 transitions. [2023-02-18 07:27:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 07:27:15,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-02-18 07:27:15,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:15,765 INFO L225 Difference]: With dead ends: 562 [2023-02-18 07:27:15,765 INFO L226 Difference]: Without dead ends: 561 [2023-02-18 07:27:15,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-02-18 07:27:15,766 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 43 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:15,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 98 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 07:27:15,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2023-02-18 07:27:15,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 520. [2023-02-18 07:27:15,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 407 states have (on average 1.194103194103194) internal successors, (486), 413 states have internal predecessors, (486), 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) [2023-02-18 07:27:15,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 645 transitions. [2023-02-18 07:27:15,782 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 645 transitions. Word has length 24 [2023-02-18 07:27:15,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:15,783 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 645 transitions. [2023-02-18 07:27:15,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 07:27:15,783 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 645 transitions. [2023-02-18 07:27:15,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 07:27:15,783 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:15,784 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:15,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 07:27:15,988 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 [2023-02-18 07:27:15,989 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:15,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:15,989 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2023-02-18 07:27:15,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:15,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808624570] [2023-02-18 07:27:15,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:15,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:16,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 07:27:16,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:16,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808624570] [2023-02-18 07:27:16,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808624570] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:16,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428060120] [2023-02-18 07:27:16,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:16,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:16,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:16,030 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:16,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 07:27:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:16,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 07:27:16,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 07:27:16,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 07:27:16,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428060120] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:16,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:16,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-02-18 07:27:16,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096310194] [2023-02-18 07:27:16,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:16,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 07:27:16,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:16,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 07:27:16,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2023-02-18 07:27:16,204 INFO L87 Difference]: Start difference. First operand 520 states and 645 transitions. Second operand has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 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) [2023-02-18 07:27:16,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:16,551 INFO L93 Difference]: Finished difference Result 1284 states and 1790 transitions. [2023-02-18 07:27:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 07:27:16,551 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 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 25 [2023-02-18 07:27:16,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:16,555 INFO L225 Difference]: With dead ends: 1284 [2023-02-18 07:27:16,555 INFO L226 Difference]: Without dead ends: 894 [2023-02-18 07:27:16,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 07:27:16,558 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 250 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:16,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 91 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 07:27:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2023-02-18 07:27:16,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 694. [2023-02-18 07:27:16,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 541 states have (on average 1.1903881700554528) internal successors, (644), 564 states have internal predecessors, (644), 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) [2023-02-18 07:27:16,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 852 transitions. [2023-02-18 07:27:16,582 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 852 transitions. Word has length 25 [2023-02-18 07:27:16,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:16,582 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 852 transitions. [2023-02-18 07:27:16,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 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) [2023-02-18 07:27:16,582 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 852 transitions. [2023-02-18 07:27:16,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 07:27:16,583 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:16,583 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:16,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:16,788 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 [2023-02-18 07:27:16,788 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:16,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:16,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1298021223, now seen corresponding path program 1 times [2023-02-18 07:27:16,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:16,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690462553] [2023-02-18 07:27:16,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:16,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:16,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 07:27:16,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:16,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690462553] [2023-02-18 07:27:16,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690462553] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:16,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022871564] [2023-02-18 07:27:16,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:16,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:16,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:16,842 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:16,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 07:27:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:16,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 07:27:16,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 07:27:16,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 07:27:16,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022871564] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:16,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-18 07:27:16,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-02-18 07:27:16,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895560116] [2023-02-18 07:27:16,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:27:16,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 07:27:16,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:16,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 07:27:16,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-02-18 07:27:16,977 INFO L87 Difference]: Start difference. First operand 694 states and 852 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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) [2023-02-18 07:27:17,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:17,084 INFO L93 Difference]: Finished difference Result 769 states and 977 transitions. [2023-02-18 07:27:17,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 07:27:17,085 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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 27 [2023-02-18 07:27:17,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:17,087 INFO L225 Difference]: With dead ends: 769 [2023-02-18 07:27:17,087 INFO L226 Difference]: Without dead ends: 768 [2023-02-18 07:27:17,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-02-18 07:27:17,088 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 46 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:17,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 107 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 07:27:17,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2023-02-18 07:27:17,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 712. [2023-02-18 07:27:17,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 559 states have (on average 1.1896243291592128) internal successors, (665), 579 states have internal predecessors, (665), 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) [2023-02-18 07:27:17,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 873 transitions. [2023-02-18 07:27:17,111 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 873 transitions. Word has length 27 [2023-02-18 07:27:17,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:17,111 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 873 transitions. [2023-02-18 07:27:17,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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) [2023-02-18 07:27:17,111 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 873 transitions. [2023-02-18 07:27:17,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 07:27:17,112 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:17,112 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:17,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:17,317 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 [2023-02-18 07:27:17,317 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:17,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:17,318 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2023-02-18 07:27:17,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:17,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664465929] [2023-02-18 07:27:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:17,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:17,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:17,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:17,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:17,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:17,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664465929] [2023-02-18 07:27:17,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664465929] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:17,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214608182] [2023-02-18 07:27:17,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:17,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:17,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:17,388 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:17,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 07:27:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:17,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 07:27:17,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:17,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:17,538 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:17,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214608182] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:17,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:17,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-02-18 07:27:17,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036355702] [2023-02-18 07:27:17,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:17,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 07:27:17,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:17,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 07:27:17,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-18 07:27:17,540 INFO L87 Difference]: Start difference. First operand 712 states and 873 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 07:27:17,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:17,810 INFO L93 Difference]: Finished difference Result 1137 states and 1677 transitions. [2023-02-18 07:27:17,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 07:27:17,810 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2023-02-18 07:27:17,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:17,814 INFO L225 Difference]: With dead ends: 1137 [2023-02-18 07:27:17,815 INFO L226 Difference]: Without dead ends: 1135 [2023-02-18 07:27:17,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2023-02-18 07:27:17,816 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 155 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:17,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 196 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 07:27:17,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2023-02-18 07:27:17,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 966. [2023-02-18 07:27:17,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 727 states have (on average 1.1760660247592847) internal successors, (855), 758 states have internal predecessors, (855), 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) [2023-02-18 07:27:17,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1300 transitions. [2023-02-18 07:27:17,855 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1300 transitions. Word has length 34 [2023-02-18 07:27:17,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:17,855 INFO L495 AbstractCegarLoop]: Abstraction has 966 states and 1300 transitions. [2023-02-18 07:27:17,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 07:27:17,855 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1300 transitions. [2023-02-18 07:27:17,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 07:27:17,856 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:17,856 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:17,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-18 07:27:18,061 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 [2023-02-18 07:27:18,061 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:18,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:18,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1979265987, now seen corresponding path program 2 times [2023-02-18 07:27:18,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:18,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464767822] [2023-02-18 07:27:18,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:18,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:18,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 07:27:18,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:18,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464767822] [2023-02-18 07:27:18,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464767822] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:18,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844237240] [2023-02-18 07:27:18,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 07:27:18,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:18,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:18,148 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:18,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 07:27:18,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 07:27:18,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:18,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 07:27:18,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 07:27:18,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 07:27:18,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844237240] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:18,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:18,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-02-18 07:27:18,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220696933] [2023-02-18 07:27:18,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:18,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 07:27:18,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:18,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 07:27:18,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-02-18 07:27:18,292 INFO L87 Difference]: Start difference. First operand 966 states and 1300 transitions. Second operand has 19 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 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) [2023-02-18 07:27:18,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:18,501 INFO L93 Difference]: Finished difference Result 1163 states and 1554 transitions. [2023-02-18 07:27:18,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 07:27:18,502 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 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 35 [2023-02-18 07:27:18,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:18,506 INFO L225 Difference]: With dead ends: 1163 [2023-02-18 07:27:18,506 INFO L226 Difference]: Without dead ends: 1162 [2023-02-18 07:27:18,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=754, Unknown=0, NotChecked=0, Total=992 [2023-02-18 07:27:18,507 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 254 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:18,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 146 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 07:27:18,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2023-02-18 07:27:18,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1019. [2023-02-18 07:27:18,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 769 states have (on average 1.1768530559167751) internal successors, (905), 796 states have internal predecessors, (905), 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) [2023-02-18 07:27:18,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1361 transitions. [2023-02-18 07:27:18,552 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1361 transitions. Word has length 35 [2023-02-18 07:27:18,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:18,552 INFO L495 AbstractCegarLoop]: Abstraction has 1019 states and 1361 transitions. [2023-02-18 07:27:18,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 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) [2023-02-18 07:27:18,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1361 transitions. [2023-02-18 07:27:18,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 07:27:18,553 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:18,553 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:18,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:18,773 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 [2023-02-18 07:27:18,773 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:18,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:18,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1607744024, now seen corresponding path program 1 times [2023-02-18 07:27:18,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:18,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453749931] [2023-02-18 07:27:18,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:18,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:18,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:18,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:18,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:18,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453749931] [2023-02-18 07:27:18,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453749931] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:18,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360674178] [2023-02-18 07:27:18,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:18,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:18,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:18,845 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:18,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 07:27:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:18,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 07:27:18,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:18,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:18,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360674178] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:18,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-18 07:27:18,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2023-02-18 07:27:18,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041005374] [2023-02-18 07:27:18,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:27:18,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 07:27:18,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:18,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 07:27:18,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-02-18 07:27:18,996 INFO L87 Difference]: Start difference. First operand 1019 states and 1361 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 07:27:19,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:19,259 INFO L93 Difference]: Finished difference Result 1129 states and 1564 transitions. [2023-02-18 07:27:19,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 07:27:19,260 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2023-02-18 07:27:19,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:19,264 INFO L225 Difference]: With dead ends: 1129 [2023-02-18 07:27:19,264 INFO L226 Difference]: Without dead ends: 1128 [2023-02-18 07:27:19,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2023-02-18 07:27:19,268 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 50 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:19,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 166 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 07:27:19,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2023-02-18 07:27:19,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1027. [2023-02-18 07:27:19,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 777 states have (on average 1.1711711711711712) internal successors, (910), 800 states have internal predecessors, (910), 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) [2023-02-18 07:27:19,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1310 transitions. [2023-02-18 07:27:19,322 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1310 transitions. Word has length 36 [2023-02-18 07:27:19,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:19,322 INFO L495 AbstractCegarLoop]: Abstraction has 1027 states and 1310 transitions. [2023-02-18 07:27:19,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 07:27:19,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1310 transitions. [2023-02-18 07:27:19,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 07:27:19,325 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:19,325 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:19,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:19,530 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 [2023-02-18 07:27:19,531 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:19,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:19,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1390366252, now seen corresponding path program 2 times [2023-02-18 07:27:19,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:19,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465595447] [2023-02-18 07:27:19,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:19,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:19,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:19,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465595447] [2023-02-18 07:27:19,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465595447] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:19,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448363325] [2023-02-18 07:27:19,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 07:27:19,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:19,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:19,633 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:19,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 07:27:19,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 07:27:19,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:19,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 07:27:19,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:19,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:19,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448363325] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:19,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:19,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-02-18 07:27:19,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343616037] [2023-02-18 07:27:19,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:19,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 07:27:19,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:19,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 07:27:19,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-02-18 07:27:19,805 INFO L87 Difference]: Start difference. First operand 1027 states and 1310 transitions. Second operand has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 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) [2023-02-18 07:27:20,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:20,239 INFO L93 Difference]: Finished difference Result 2044 states and 2749 transitions. [2023-02-18 07:27:20,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 07:27:20,239 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 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 43 [2023-02-18 07:27:20,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:20,246 INFO L225 Difference]: With dead ends: 2044 [2023-02-18 07:27:20,246 INFO L226 Difference]: Without dead ends: 2043 [2023-02-18 07:27:20,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 67 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 07:27:20,248 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 430 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:20,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 451 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 07:27:20,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2023-02-18 07:27:20,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1748. [2023-02-18 07:27:20,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1315 states have (on average 1.1460076045627376) internal successors, (1507), 1367 states have internal predecessors, (1507), 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) [2023-02-18 07:27:20,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 2190 transitions. [2023-02-18 07:27:20,315 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 2190 transitions. Word has length 43 [2023-02-18 07:27:20,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:20,315 INFO L495 AbstractCegarLoop]: Abstraction has 1748 states and 2190 transitions. [2023-02-18 07:27:20,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 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) [2023-02-18 07:27:20,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 2190 transitions. [2023-02-18 07:27:20,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 07:27:20,317 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:20,317 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:20,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:20,521 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 [2023-02-18 07:27:20,522 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:20,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:20,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1058043410, now seen corresponding path program 2 times [2023-02-18 07:27:20,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:20,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310983527] [2023-02-18 07:27:20,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:20,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:20,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:20,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:20,651 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:20,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:20,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310983527] [2023-02-18 07:27:20,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310983527] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:20,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097821495] [2023-02-18 07:27:20,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 07:27:20,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:20,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:20,665 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:20,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 07:27:20,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 07:27:20,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:20,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 07:27:20,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:20,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:20,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097821495] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:20,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:20,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-02-18 07:27:20,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418568253] [2023-02-18 07:27:20,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:20,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 07:27:20,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:20,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 07:27:20,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-02-18 07:27:20,824 INFO L87 Difference]: Start difference. First operand 1748 states and 2190 transitions. Second operand has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 07:27:21,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:21,468 INFO L93 Difference]: Finished difference Result 3771 states and 5462 transitions. [2023-02-18 07:27:21,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-18 07:27:21,468 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2023-02-18 07:27:21,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:21,485 INFO L225 Difference]: With dead ends: 3771 [2023-02-18 07:27:21,485 INFO L226 Difference]: Without dead ends: 2618 [2023-02-18 07:27:21,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 07:27:21,492 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 235 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:21,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 291 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 07:27:21,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2023-02-18 07:27:21,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 1927. [2023-02-18 07:27:21,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1452 states have (on average 1.1398071625344353) internal successors, (1655), 1510 states have internal predecessors, (1655), 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) [2023-02-18 07:27:21,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 2396 transitions. [2023-02-18 07:27:21,601 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 2396 transitions. Word has length 44 [2023-02-18 07:27:21,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:21,601 INFO L495 AbstractCegarLoop]: Abstraction has 1927 states and 2396 transitions. [2023-02-18 07:27:21,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 07:27:21,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 2396 transitions. [2023-02-18 07:27:21,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 07:27:21,602 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:21,603 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:21,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:21,807 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 [2023-02-18 07:27:21,808 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:21,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:21,808 INFO L85 PathProgramCache]: Analyzing trace with hash 407823314, now seen corresponding path program 1 times [2023-02-18 07:27:21,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:21,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565598588] [2023-02-18 07:27:21,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:21,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:21,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-18 07:27:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 38 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 07:27:21,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:21,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565598588] [2023-02-18 07:27:21,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565598588] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:21,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225380214] [2023-02-18 07:27:21,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:21,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:21,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:21,865 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:21,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 07:27:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:21,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 07:27:21,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 07:27:21,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 07:27:21,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225380214] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:21,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:21,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-02-18 07:27:21,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982413065] [2023-02-18 07:27:21,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:21,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 07:27:21,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:21,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 07:27:21,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-02-18 07:27:21,995 INFO L87 Difference]: Start difference. First operand 1927 states and 2396 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 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) [2023-02-18 07:27:22,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:22,519 INFO L93 Difference]: Finished difference Result 2463 states and 3242 transitions. [2023-02-18 07:27:22,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 07:27:22,520 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 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 51 [2023-02-18 07:27:22,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:22,530 INFO L225 Difference]: With dead ends: 2463 [2023-02-18 07:27:22,530 INFO L226 Difference]: Without dead ends: 2363 [2023-02-18 07:27:22,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 07:27:22,532 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 160 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:22,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 85 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 07:27:22,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2023-02-18 07:27:22,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 1867. [2023-02-18 07:27:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1405 states have (on average 1.1330960854092527) internal successors, (1592), 1467 states have internal predecessors, (1592), 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) [2023-02-18 07:27:22,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 2321 transitions. [2023-02-18 07:27:22,641 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 2321 transitions. Word has length 51 [2023-02-18 07:27:22,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:22,641 INFO L495 AbstractCegarLoop]: Abstraction has 1867 states and 2321 transitions. [2023-02-18 07:27:22,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 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) [2023-02-18 07:27:22,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 2321 transitions. [2023-02-18 07:27:22,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 07:27:22,642 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:22,642 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:22,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-18 07:27:22,849 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 [2023-02-18 07:27:22,850 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:22,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:22,851 INFO L85 PathProgramCache]: Analyzing trace with hash 357169897, now seen corresponding path program 3 times [2023-02-18 07:27:22,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:22,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181375242] [2023-02-18 07:27:22,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:22,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:22,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-18 07:27:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 07:27:22,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:22,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181375242] [2023-02-18 07:27:22,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181375242] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:22,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603381157] [2023-02-18 07:27:22,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 07:27:22,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:22,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:22,986 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:22,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 07:27:23,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 07:27:23,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:23,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 07:27:23,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 07:27:23,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 69 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 07:27:23,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603381157] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:23,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:23,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2023-02-18 07:27:23,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224940450] [2023-02-18 07:27:23,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:23,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 07:27:23,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:23,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 07:27:23,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2023-02-18 07:27:23,211 INFO L87 Difference]: Start difference. First operand 1867 states and 2321 transitions. Second operand has 27 states, 24 states have (on average 3.125) internal successors, (75), 19 states have internal predecessors, (75), 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) [2023-02-18 07:27:23,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:23,673 INFO L93 Difference]: Finished difference Result 2157 states and 2766 transitions. [2023-02-18 07:27:23,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-18 07:27:23,674 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 3.125) internal successors, (75), 19 states have internal predecessors, (75), 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 51 [2023-02-18 07:27:23,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:23,680 INFO L225 Difference]: With dead ends: 2157 [2023-02-18 07:27:23,681 INFO L226 Difference]: Without dead ends: 2156 [2023-02-18 07:27:23,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 81 SyntacticMatches, 11 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=634, Invalid=1916, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 07:27:23,682 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 468 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:23,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 182 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 07:27:23,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2023-02-18 07:27:23,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1895. [2023-02-18 07:27:23,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1895 states, 1428 states have (on average 1.1330532212885154) internal successors, (1618), 1490 states have internal predecessors, (1618), 291 states have call successors, (291), 105 states have call predecessors, (291), 172 states have return successors, (443), 299 states have call predecessors, (443), 245 states have call successors, (443) [2023-02-18 07:27:23,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 2352 transitions. [2023-02-18 07:27:23,801 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 2352 transitions. Word has length 51 [2023-02-18 07:27:23,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:23,802 INFO L495 AbstractCegarLoop]: Abstraction has 1895 states and 2352 transitions. [2023-02-18 07:27:23,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 3.125) internal successors, (75), 19 states have internal predecessors, (75), 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) [2023-02-18 07:27:23,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 2352 transitions. [2023-02-18 07:27:23,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-18 07:27:23,804 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:23,804 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:23,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:24,009 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 [2023-02-18 07:27:24,009 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:24,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:24,009 INFO L85 PathProgramCache]: Analyzing trace with hash 843839239, now seen corresponding path program 1 times [2023-02-18 07:27:24,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:24,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324554031] [2023-02-18 07:27:24,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:24,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:24,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:24,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:24,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:24,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 07:27:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 07:27:24,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:24,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324554031] [2023-02-18 07:27:24,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324554031] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:24,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575254915] [2023-02-18 07:27:24,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:24,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:24,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:24,166 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:24,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 07:27:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:24,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 07:27:24,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 07:27:24,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 07:27:24,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575254915] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:24,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:24,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-18 07:27:24,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018157708] [2023-02-18 07:27:24,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:24,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 07:27:24,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:24,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 07:27:24,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-02-18 07:27:24,408 INFO L87 Difference]: Start difference. First operand 1895 states and 2352 transitions. Second operand has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-18 07:27:25,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:25,451 INFO L93 Difference]: Finished difference Result 4390 states and 7701 transitions. [2023-02-18 07:27:25,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-18 07:27:25,452 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 53 [2023-02-18 07:27:25,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:25,489 INFO L225 Difference]: With dead ends: 4390 [2023-02-18 07:27:25,490 INFO L226 Difference]: Without dead ends: 4388 [2023-02-18 07:27:25,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2023-02-18 07:27:25,493 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 318 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 684 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:25,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 253 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [684 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 07:27:25,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4388 states. [2023-02-18 07:27:25,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4388 to 3212. [2023-02-18 07:27:25,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3212 states, 2254 states have (on average 1.1029281277728482) internal successors, (2486), 2319 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) [2023-02-18 07:27:25,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3212 states to 3212 states and 6170 transitions. [2023-02-18 07:27:25,676 INFO L78 Accepts]: Start accepts. Automaton has 3212 states and 6170 transitions. Word has length 53 [2023-02-18 07:27:25,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:25,676 INFO L495 AbstractCegarLoop]: Abstraction has 3212 states and 6170 transitions. [2023-02-18 07:27:25,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-18 07:27:25,676 INFO L276 IsEmpty]: Start isEmpty. Operand 3212 states and 6170 transitions. [2023-02-18 07:27:25,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-18 07:27:25,678 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:25,678 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:25,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:25,883 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 [2023-02-18 07:27:25,883 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:25,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:25,884 INFO L85 PathProgramCache]: Analyzing trace with hash 2013961680, now seen corresponding path program 1 times [2023-02-18 07:27:25,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:25,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474091627] [2023-02-18 07:27:25,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:25,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 07:27:25,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:25,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474091627] [2023-02-18 07:27:25,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474091627] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:25,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217518617] [2023-02-18 07:27:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:25,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:25,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:26,002 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:26,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 07:27:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:26,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 07:27:26,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 07:27:26,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 07:27:26,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217518617] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:26,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:26,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-02-18 07:27:26,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427736108] [2023-02-18 07:27:26,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:26,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 07:27:26,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:26,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 07:27:26,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-02-18 07:27:26,250 INFO L87 Difference]: Start difference. First operand 3212 states and 6170 transitions. Second operand has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:27,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:27,126 INFO L93 Difference]: Finished difference Result 9358 states and 17609 transitions. [2023-02-18 07:27:27,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 07:27:27,127 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-02-18 07:27:27,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:27,215 INFO L225 Difference]: With dead ends: 9358 [2023-02-18 07:27:27,215 INFO L226 Difference]: Without dead ends: 9357 [2023-02-18 07:27:27,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 91 SyntacticMatches, 17 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 07:27:27,221 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 722 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:27,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 340 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 07:27:27,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9357 states. [2023-02-18 07:27:27,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9357 to 8660. [2023-02-18 07:27:27,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8660 states, 6118 states have (on average 1.104609349460608) internal successors, (6758), 6273 states have internal predecessors, (6758), 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) [2023-02-18 07:27:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8660 states to 8660 states and 16472 transitions. [2023-02-18 07:27:27,920 INFO L78 Accepts]: Start accepts. Automaton has 8660 states and 16472 transitions. Word has length 57 [2023-02-18 07:27:27,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:27,920 INFO L495 AbstractCegarLoop]: Abstraction has 8660 states and 16472 transitions. [2023-02-18 07:27:27,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:27,921 INFO L276 IsEmpty]: Start isEmpty. Operand 8660 states and 16472 transitions. [2023-02-18 07:27:27,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 07:27:27,923 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:27,923 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:27,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:28,127 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 [2023-02-18 07:27:28,128 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:28,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:28,128 INFO L85 PathProgramCache]: Analyzing trace with hash -814290418, now seen corresponding path program 1 times [2023-02-18 07:27:28,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:28,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29077350] [2023-02-18 07:27:28,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:28,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:28,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:28,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:28,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:28,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:28,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 07:27:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 07:27:28,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:28,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29077350] [2023-02-18 07:27:28,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29077350] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:28,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092384050] [2023-02-18 07:27:28,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:28,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:28,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:28,287 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:28,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 07:27:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:28,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 07:27:28,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 07:27:28,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 07:27:28,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092384050] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:28,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:28,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-18 07:27:28,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770401487] [2023-02-18 07:27:28,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:28,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 07:27:28,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:28,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 07:27:28,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-02-18 07:27:28,600 INFO L87 Difference]: Start difference. First operand 8660 states and 16472 transitions. Second operand has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-18 07:27:30,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:30,428 INFO L93 Difference]: Finished difference Result 30195 states and 100270 transitions. [2023-02-18 07:27:30,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-18 07:27:30,429 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2023-02-18 07:27:30,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:30,740 INFO L225 Difference]: With dead ends: 30195 [2023-02-18 07:27:30,740 INFO L226 Difference]: Without dead ends: 22200 [2023-02-18 07:27:30,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 95 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=905, Invalid=3517, Unknown=0, NotChecked=0, Total=4422 [2023-02-18 07:27:30,825 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 158 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:30,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 305 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 07:27:30,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22200 states. [2023-02-18 07:27:32,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22200 to 17548. [2023-02-18 07:27:32,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17548 states, 11658 states have (on average 1.0686224052153028) internal successors, (12458), 11785 states have internal predecessors, (12458), 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) [2023-02-18 07:27:32,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17548 states to 17548 states and 59714 transitions. [2023-02-18 07:27:32,846 INFO L78 Accepts]: Start accepts. Automaton has 17548 states and 59714 transitions. Word has length 55 [2023-02-18 07:27:32,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:32,847 INFO L495 AbstractCegarLoop]: Abstraction has 17548 states and 59714 transitions. [2023-02-18 07:27:32,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-18 07:27:32,847 INFO L276 IsEmpty]: Start isEmpty. Operand 17548 states and 59714 transitions. [2023-02-18 07:27:32,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-18 07:27:32,850 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:32,850 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:32,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:33,055 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 [2023-02-18 07:27:33,056 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:33,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:33,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1106576793, now seen corresponding path program 2 times [2023-02-18 07:27:33,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:33,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580644396] [2023-02-18 07:27:33,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:33,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:33,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:33,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:33,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:33,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:33,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 07:27:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 70 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-18 07:27:33,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:33,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580644396] [2023-02-18 07:27:33,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580644396] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:33,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807071489] [2023-02-18 07:27:33,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 07:27:33,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:33,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:33,238 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:33,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 07:27:33,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 07:27:33,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:33,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 07:27:33,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 07:27:33,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:33,554 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 78 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-18 07:27:33,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807071489] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:33,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:33,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2023-02-18 07:27:33,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347016871] [2023-02-18 07:27:33,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:33,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 07:27:33,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:33,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 07:27:33,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 07:27:33,557 INFO L87 Difference]: Start difference. First operand 17548 states and 59714 transitions. Second operand has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-18 07:27:35,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:35,392 INFO L93 Difference]: Finished difference Result 29333 states and 97052 transitions. [2023-02-18 07:27:35,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-18 07:27:35,393 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 72 [2023-02-18 07:27:35,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:35,456 INFO L225 Difference]: With dead ends: 29333 [2023-02-18 07:27:35,457 INFO L226 Difference]: Without dead ends: 12445 [2023-02-18 07:27:35,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 126 SyntacticMatches, 14 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2023-02-18 07:27:35,670 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 229 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:35,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 299 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 07:27:35,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12445 states. [2023-02-18 07:27:36,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12445 to 11049. [2023-02-18 07:27:36,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11049 states, 7827 states have (on average 1.109237255653507) internal successors, (8682), 8130 states have internal predecessors, (8682), 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) [2023-02-18 07:27:36,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11049 states to 11049 states and 16599 transitions. [2023-02-18 07:27:36,643 INFO L78 Accepts]: Start accepts. Automaton has 11049 states and 16599 transitions. Word has length 72 [2023-02-18 07:27:36,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:36,644 INFO L495 AbstractCegarLoop]: Abstraction has 11049 states and 16599 transitions. [2023-02-18 07:27:36,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-18 07:27:36,644 INFO L276 IsEmpty]: Start isEmpty. Operand 11049 states and 16599 transitions. [2023-02-18 07:27:36,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 07:27:36,648 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:36,648 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:36,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:36,853 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 [2023-02-18 07:27:36,853 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:36,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:36,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2104709525, now seen corresponding path program 4 times [2023-02-18 07:27:36,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:36,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427735806] [2023-02-18 07:27:36,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:36,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:36,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 07:27:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 4 proven. 158 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 07:27:36,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:36,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427735806] [2023-02-18 07:27:36,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427735806] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:36,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710053202] [2023-02-18 07:27:36,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 07:27:36,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:36,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:37,000 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:37,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 07:27:37,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 07:27:37,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:37,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 07:27:37,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 103 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-18 07:27:37,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 103 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-18 07:27:37,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710053202] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:37,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:37,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 23 [2023-02-18 07:27:37,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868034893] [2023-02-18 07:27:37,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:37,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 07:27:37,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:37,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 07:27:37,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2023-02-18 07:27:37,124 INFO L87 Difference]: Start difference. First operand 11049 states and 16599 transitions. Second operand has 23 states, 22 states have (on average 3.5) internal successors, (77), 16 states have internal predecessors, (77), 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) [2023-02-18 07:27:37,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:37,771 INFO L93 Difference]: Finished difference Result 11583 states and 17379 transitions. [2023-02-18 07:27:37,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 07:27:37,772 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.5) internal successors, (77), 16 states have internal predecessors, (77), 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 67 [2023-02-18 07:27:37,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:37,805 INFO L225 Difference]: With dead ends: 11583 [2023-02-18 07:27:37,805 INFO L226 Difference]: Without dead ends: 9316 [2023-02-18 07:27:37,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=374, Invalid=1348, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 07:27:37,819 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 289 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:37,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 86 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 07:27:37,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9316 states. [2023-02-18 07:27:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9316 to 8750. [2023-02-18 07:27:38,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8750 states, 5956 states have (on average 1.0661517797179314) internal successors, (6350), 6082 states have internal predecessors, (6350), 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) [2023-02-18 07:27:38,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8750 states to 8750 states and 13768 transitions. [2023-02-18 07:27:38,445 INFO L78 Accepts]: Start accepts. Automaton has 8750 states and 13768 transitions. Word has length 67 [2023-02-18 07:27:38,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:38,445 INFO L495 AbstractCegarLoop]: Abstraction has 8750 states and 13768 transitions. [2023-02-18 07:27:38,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.5) internal successors, (77), 16 states have internal predecessors, (77), 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) [2023-02-18 07:27:38,446 INFO L276 IsEmpty]: Start isEmpty. Operand 8750 states and 13768 transitions. [2023-02-18 07:27:38,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-18 07:27:38,450 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:38,450 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:38,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:38,655 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 [2023-02-18 07:27:38,655 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:38,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:38,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1935422832, now seen corresponding path program 3 times [2023-02-18 07:27:38,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:38,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076371241] [2023-02-18 07:27:38,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:38,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:38,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:38,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 62 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:38,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:38,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076371241] [2023-02-18 07:27:38,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076371241] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:38,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509781605] [2023-02-18 07:27:38,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 07:27:38,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:38,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:38,803 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:38,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 07:27:38,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-18 07:27:38,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:38,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 07:27:38,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 60 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:39,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 64 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:39,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509781605] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:39,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:39,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2023-02-18 07:27:39,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550626654] [2023-02-18 07:27:39,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:39,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 07:27:39,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:39,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 07:27:39,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 07:27:39,191 INFO L87 Difference]: Start difference. First operand 8750 states and 13768 transitions. Second operand has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 07:27:39,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:39,952 INFO L93 Difference]: Finished difference Result 9401 states and 14766 transitions. [2023-02-18 07:27:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 07:27:39,953 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2023-02-18 07:27:39,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:39,981 INFO L225 Difference]: With dead ends: 9401 [2023-02-18 07:27:39,981 INFO L226 Difference]: Without dead ends: 9400 [2023-02-18 07:27:39,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 115 SyntacticMatches, 12 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=573, Invalid=1977, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 07:27:39,985 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 241 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:39,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 297 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 07:27:39,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9400 states. [2023-02-18 07:27:40,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9400 to 8858. [2023-02-18 07:27:40,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8858 states, 6028 states have (on average 1.0623755806237558) internal successors, (6404), 6154 states have internal predecessors, (6404), 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) [2023-02-18 07:27:40,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8858 states to 8858 states and 13916 transitions. [2023-02-18 07:27:40,521 INFO L78 Accepts]: Start accepts. Automaton has 8858 states and 13916 transitions. Word has length 68 [2023-02-18 07:27:40,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:40,521 INFO L495 AbstractCegarLoop]: Abstraction has 8858 states and 13916 transitions. [2023-02-18 07:27:40,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 07:27:40,521 INFO L276 IsEmpty]: Start isEmpty. Operand 8858 states and 13916 transitions. [2023-02-18 07:27:40,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-18 07:27:40,524 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:40,524 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:40,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-18 07:27:40,729 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 [2023-02-18 07:27:40,729 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:40,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:40,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1903746682, now seen corresponding path program 2 times [2023-02-18 07:27:40,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:40,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533314704] [2023-02-18 07:27:40,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:40,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:40,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:40,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:40,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:40,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:40,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:40,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 07:27:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:40,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 07:27:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 85 proven. 24 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-02-18 07:27:40,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:40,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533314704] [2023-02-18 07:27:40,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533314704] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:40,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351232232] [2023-02-18 07:27:40,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 07:27:40,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:40,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:40,877 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:40,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-18 07:27:40,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 07:27:40,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:40,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 07:27:40,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 85 proven. 15 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-02-18 07:27:40,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:41,038 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 85 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-18 07:27:41,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351232232] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:41,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:41,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2023-02-18 07:27:41,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114230919] [2023-02-18 07:27:41,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:41,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 07:27:41,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:41,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 07:27:41,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-18 07:27:41,041 INFO L87 Difference]: Start difference. First operand 8858 states and 13916 transitions. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2023-02-18 07:27:41,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:41,708 INFO L93 Difference]: Finished difference Result 17973 states and 31840 transitions. [2023-02-18 07:27:41,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 07:27:41,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 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 81 [2023-02-18 07:27:41,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:41,747 INFO L225 Difference]: With dead ends: 17973 [2023-02-18 07:27:41,747 INFO L226 Difference]: Without dead ends: 9802 [2023-02-18 07:27:41,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 165 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2023-02-18 07:27:41,779 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 70 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:41,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 108 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 07:27:41,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9802 states. [2023-02-18 07:27:42,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9802 to 8852. [2023-02-18 07:27:42,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8852 states, 6025 states have (on average 1.0624066390041493) internal successors, (6401), 6151 states have internal predecessors, (6401), 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) [2023-02-18 07:27:42,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8852 states to 8852 states and 13830 transitions. [2023-02-18 07:27:42,317 INFO L78 Accepts]: Start accepts. Automaton has 8852 states and 13830 transitions. Word has length 81 [2023-02-18 07:27:42,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:42,317 INFO L495 AbstractCegarLoop]: Abstraction has 8852 states and 13830 transitions. [2023-02-18 07:27:42,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2023-02-18 07:27:42,317 INFO L276 IsEmpty]: Start isEmpty. Operand 8852 states and 13830 transitions. [2023-02-18 07:27:42,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-18 07:27:42,322 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:42,322 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:42,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:42,527 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 [2023-02-18 07:27:42,527 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:42,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:42,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1307053986, now seen corresponding path program 3 times [2023-02-18 07:27:42,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:42,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978856258] [2023-02-18 07:27:42,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:42,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:42,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:42,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:42,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:42,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:42,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:42,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:42,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 07:27:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:42,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-18 07:27:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:42,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-02-18 07:27:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 117 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-02-18 07:27:42,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:42,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978856258] [2023-02-18 07:27:42,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978856258] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:42,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798989900] [2023-02-18 07:27:42,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 07:27:42,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:42,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:42,843 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:42,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-18 07:27:42,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-18 07:27:42,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:42,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 07:27:42,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 153 proven. 26 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-02-18 07:27:42,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 123 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-18 07:27:43,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798989900] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:43,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:43,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2023-02-18 07:27:43,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334118678] [2023-02-18 07:27:43,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:43,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 07:27:43,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:43,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 07:27:43,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-02-18 07:27:43,090 INFO L87 Difference]: Start difference. First operand 8852 states and 13830 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) [2023-02-18 07:27:43,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:43,868 INFO L93 Difference]: Finished difference Result 20482 states and 41518 transitions. [2023-02-18 07:27:43,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 07:27:43,869 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 100 [2023-02-18 07:27:43,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:43,926 INFO L225 Difference]: With dead ends: 20482 [2023-02-18 07:27:43,927 INFO L226 Difference]: Without dead ends: 12345 [2023-02-18 07:27:43,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 199 SyntacticMatches, 16 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2023-02-18 07:27:43,969 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 55 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:43,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 133 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 07:27:43,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12345 states. [2023-02-18 07:27:44,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12345 to 11980. [2023-02-18 07:27:44,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11980 states, 8084 states have (on average 1.053686293913904) internal successors, (8518), 8271 states have internal predecessors, (8518), 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) [2023-02-18 07:27:44,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11980 states to 11980 states and 19050 transitions. [2023-02-18 07:27:44,771 INFO L78 Accepts]: Start accepts. Automaton has 11980 states and 19050 transitions. Word has length 100 [2023-02-18 07:27:44,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:44,772 INFO L495 AbstractCegarLoop]: Abstraction has 11980 states and 19050 transitions. [2023-02-18 07:27:44,772 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) [2023-02-18 07:27:44,772 INFO L276 IsEmpty]: Start isEmpty. Operand 11980 states and 19050 transitions. [2023-02-18 07:27:44,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-18 07:27:44,777 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:44,777 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 7, 7, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:44,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:44,982 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 [2023-02-18 07:27:44,982 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:44,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:44,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1104252262, now seen corresponding path program 3 times [2023-02-18 07:27:44,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:44,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580644521] [2023-02-18 07:27:44,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:44,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:45,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:45,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:45,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:45,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 07:27:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 120 proven. 86 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 07:27:45,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:45,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580644521] [2023-02-18 07:27:45,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580644521] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:45,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691104485] [2023-02-18 07:27:45,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 07:27:45,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:45,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:45,241 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:45,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-18 07:27:45,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-18 07:27:45,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:45,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 07:27:45,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 113 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-02-18 07:27:45,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 142 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-18 07:27:45,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691104485] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:45,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:45,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2023-02-18 07:27:45,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194127176] [2023-02-18 07:27:45,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:45,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 07:27:45,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:45,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 07:27:45,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2023-02-18 07:27:45,453 INFO L87 Difference]: Start difference. First operand 11980 states and 19050 transitions. Second operand has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-18 07:27:46,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:46,772 INFO L93 Difference]: Finished difference Result 20826 states and 35598 transitions. [2023-02-18 07:27:46,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-18 07:27:46,772 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 87 [2023-02-18 07:27:46,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:46,817 INFO L225 Difference]: With dead ends: 20826 [2023-02-18 07:27:46,817 INFO L226 Difference]: Without dead ends: 10351 [2023-02-18 07:27:46,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 177 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=983, Invalid=3439, Unknown=0, NotChecked=0, Total=4422 [2023-02-18 07:27:46,859 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 202 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:46,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 177 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 07:27:46,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10351 states. [2023-02-18 07:27:47,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10351 to 8751. [2023-02-18 07:27:47,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8751 states, 5978 states have (on average 1.0463365674138507) internal successors, (6255), 6154 states have internal predecessors, (6255), 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) [2023-02-18 07:27:47,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8751 states to 8751 states and 12063 transitions. [2023-02-18 07:27:47,332 INFO L78 Accepts]: Start accepts. Automaton has 8751 states and 12063 transitions. Word has length 87 [2023-02-18 07:27:47,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:47,332 INFO L495 AbstractCegarLoop]: Abstraction has 8751 states and 12063 transitions. [2023-02-18 07:27:47,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-18 07:27:47,332 INFO L276 IsEmpty]: Start isEmpty. Operand 8751 states and 12063 transitions. [2023-02-18 07:27:47,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-02-18 07:27:47,335 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:47,335 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:47,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:47,539 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 [2023-02-18 07:27:47,540 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:47,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:47,540 INFO L85 PathProgramCache]: Analyzing trace with hash -133792040, now seen corresponding path program 3 times [2023-02-18 07:27:47,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:47,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801823545] [2023-02-18 07:27:47,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:47,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:47,794 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:47,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:47,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801823545] [2023-02-18 07:27:47,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801823545] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:47,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537845578] [2023-02-18 07:27:47,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 07:27:47,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:47,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:47,797 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:47,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-18 07:27:47,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-02-18 07:27:47,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:47,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 07:27:47,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:48,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:48,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537845578] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:48,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:48,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-02-18 07:27:48,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898985491] [2023-02-18 07:27:48,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:48,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-18 07:27:48,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:48,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-18 07:27:48,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 07:27:48,369 INFO L87 Difference]: Start difference. First operand 8751 states and 12063 transitions. Second operand has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 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) [2023-02-18 07:27:50,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:50,120 INFO L93 Difference]: Finished difference Result 15928 states and 22083 transitions. [2023-02-18 07:27:50,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-02-18 07:27:50,121 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 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 91 [2023-02-18 07:27:50,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:50,175 INFO L225 Difference]: With dead ends: 15928 [2023-02-18 07:27:50,175 INFO L226 Difference]: Without dead ends: 15927 [2023-02-18 07:27:50,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 139 SyntacticMatches, 20 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2023-02-18 07:27:50,187 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 1052 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:50,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1056 Valid, 678 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [617 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 07:27:50,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15927 states. [2023-02-18 07:27:51,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15927 to 15927. [2023-02-18 07:27:51,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15927 states, 10802 states have (on average 1.0456396963525274) internal successors, (11295), 11194 states have internal predecessors, (11295), 3103 states have call successors, (3103), 568 states have call predecessors, (3103), 2018 states have return successors, (7673), 4164 states have call predecessors, (7673), 3069 states have call successors, (7673) [2023-02-18 07:27:51,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15927 states to 15927 states and 22071 transitions. [2023-02-18 07:27:51,113 INFO L78 Accepts]: Start accepts. Automaton has 15927 states and 22071 transitions. Word has length 91 [2023-02-18 07:27:51,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:51,114 INFO L495 AbstractCegarLoop]: Abstraction has 15927 states and 22071 transitions. [2023-02-18 07:27:51,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 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) [2023-02-18 07:27:51,114 INFO L276 IsEmpty]: Start isEmpty. Operand 15927 states and 22071 transitions. [2023-02-18 07:27:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-02-18 07:27:51,117 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:51,117 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:51,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:51,322 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 [2023-02-18 07:27:51,323 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:51,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:51,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1765664819, now seen corresponding path program 4 times [2023-02-18 07:27:51,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:51,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802580599] [2023-02-18 07:27:51,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:51,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:51,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:51,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:51,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:51,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:51,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:51,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 07:27:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:51,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 07:27:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:51,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-02-18 07:27:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 51 proven. 69 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-02-18 07:27:51,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:51,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802580599] [2023-02-18 07:27:51,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802580599] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:51,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477794483] [2023-02-18 07:27:51,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 07:27:51,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:51,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:51,636 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:51,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-18 07:27:51,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 07:27:51,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:51,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-18 07:27:51,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-18 07:27:51,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 42 proven. 93 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-18 07:27:52,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477794483] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:52,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:52,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2023-02-18 07:27:52,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152473016] [2023-02-18 07:27:52,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:52,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-18 07:27:52,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:52,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-18 07:27:52,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 07:27:52,186 INFO L87 Difference]: Start difference. First operand 15927 states and 22071 transitions. Second operand has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2023-02-18 07:27:56,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:56,186 INFO L93 Difference]: Finished difference Result 45665 states and 72940 transitions. [2023-02-18 07:27:56,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-02-18 07:27:56,187 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) Word has length 91 [2023-02-18 07:27:56,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:56,355 INFO L225 Difference]: With dead ends: 45665 [2023-02-18 07:27:56,356 INFO L226 Difference]: Without dead ends: 44563 [2023-02-18 07:27:56,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 165 SyntacticMatches, 12 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12303 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=5454, Invalid=27126, Unknown=0, NotChecked=0, Total=32580 [2023-02-18 07:27:56,396 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 363 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 1043 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1043 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:56,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 262 Invalid, 2102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1043 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 07:27:56,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44563 states. [2023-02-18 07:27:58,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44563 to 28637. [2023-02-18 07:27:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28637 states, 18550 states have (on average 1.0279784366576818) internal successors, (19069), 18925 states have internal predecessors, (19069), 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) [2023-02-18 07:27:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28637 states to 28637 states and 44545 transitions. [2023-02-18 07:27:58,380 INFO L78 Accepts]: Start accepts. Automaton has 28637 states and 44545 transitions. Word has length 91 [2023-02-18 07:27:58,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:58,382 INFO L495 AbstractCegarLoop]: Abstraction has 28637 states and 44545 transitions. [2023-02-18 07:27:58,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2023-02-18 07:27:58,382 INFO L276 IsEmpty]: Start isEmpty. Operand 28637 states and 44545 transitions. [2023-02-18 07:27:58,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-02-18 07:27:58,393 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:58,393 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:58,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-02-18 07:27:58,596 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 [2023-02-18 07:27:58,597 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:58,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:58,597 INFO L85 PathProgramCache]: Analyzing trace with hash 951429890, now seen corresponding path program 2 times [2023-02-18 07:27:58,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:58,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892982680] [2023-02-18 07:27:58,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:58,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 07:27:59,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:59,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892982680] [2023-02-18 07:27:59,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892982680] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:59,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243405718] [2023-02-18 07:27:59,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 07:27:59,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:59,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:59,045 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) [2023-02-18 07:27:59,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-18 07:27:59,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 07:27:59,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:59,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-18 07:27:59,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 07:27:59,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 07:27:59,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243405718] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:59,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:59,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-02-18 07:27:59,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699896866] [2023-02-18 07:27:59,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:59,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-18 07:27:59,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:59,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-18 07:27:59,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 07:27:59,812 INFO L87 Difference]: Start difference. First operand 28637 states and 44545 transitions. Second operand has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:28:03,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:28:03,742 INFO L93 Difference]: Finished difference Result 64750 states and 101363 transitions. [2023-02-18 07:28:03,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-02-18 07:28:03,742 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2023-02-18 07:28:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:28:03,960 INFO L225 Difference]: With dead ends: 64750 [2023-02-18 07:28:03,960 INFO L226 Difference]: Without dead ends: 64749 [2023-02-18 07:28:03,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 229 SyntacticMatches, 47 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2560 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2023-02-18 07:28:03,989 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2174 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 873 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2177 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 873 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 07:28:03,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2177 Valid, 551 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [873 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 07:28:04,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64749 states. [2023-02-18 07:28:07,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64749 to 64697. [2023-02-18 07:28:07,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64697 states, 41998 states have (on average 1.0286442211533882) internal successors, (43201), 42865 states have internal predecessors, (43201), 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) [2023-02-18 07:28:07,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64697 states to 64697 states and 101341 transitions. [2023-02-18 07:28:07,931 INFO L78 Accepts]: Start accepts. Automaton has 64697 states and 101341 transitions. Word has length 141 [2023-02-18 07:28:07,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:28:07,931 INFO L495 AbstractCegarLoop]: Abstraction has 64697 states and 101341 transitions. [2023-02-18 07:28:07,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:28:07,932 INFO L276 IsEmpty]: Start isEmpty. Operand 64697 states and 101341 transitions. [2023-02-18 07:28:07,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-02-18 07:28:07,947 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:28:07,947 INFO L195 NwaCegarLoop]: trace histogram [28, 21, 17, 17, 17, 17, 17, 16, 16, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-18 07:28:07,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-18 07:28:08,151 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 [2023-02-18 07:28:08,152 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:28:08,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:28:08,152 INFO L85 PathProgramCache]: Analyzing trace with hash 577749920, now seen corresponding path program 1 times [2023-02-18 07:28:08,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:28:08,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067960332] [2023-02-18 07:28:08,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:28:08,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:28:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-02-18 07:28:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:28:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:28:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:28:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:28:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:28:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 07:28:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-18 07:28:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:28:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:28:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:09,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:28:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:09,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:28:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:09,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:28:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:09,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 07:28:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:09,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 07:28:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:09,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-02-18 07:28:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:09,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-18 07:28:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 727 proven. 214 refuted. 0 times theorem prover too weak. 1084 trivial. 0 not checked. [2023-02-18 07:28:09,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:28:09,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067960332] [2023-02-18 07:28:09,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067960332] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:28:09,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643779194] [2023-02-18 07:28:09,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:28:09,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:28:09,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:28:09,211 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) [2023-02-18 07:28:09,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-18 07:28:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:09,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-18 07:28:09,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:28:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 715 proven. 216 refuted. 0 times theorem prover too weak. 1094 trivial. 0 not checked. [2023-02-18 07:28:09,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:28:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 731 proven. 263 refuted. 0 times theorem prover too weak. 1031 trivial. 0 not checked. [2023-02-18 07:28:09,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643779194] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:28:09,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:28:09,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 21] total 27 [2023-02-18 07:28:09,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988030575] [2023-02-18 07:28:09,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:28:09,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 07:28:09,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:28:09,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 07:28:09,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2023-02-18 07:28:09,724 INFO L87 Difference]: Start difference. First operand 64697 states and 101341 transitions. Second operand has 27 states, 27 states have (on average 4.555555555555555) internal successors, (123), 24 states have internal predecessors, (123), 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) [2023-02-18 07:28:15,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:28:15,540 INFO L93 Difference]: Finished difference Result 152890 states and 310323 transitions. [2023-02-18 07:28:15,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 07:28:15,541 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.555555555555555) internal successors, (123), 24 states have internal predecessors, (123), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) Word has length 250 [2023-02-18 07:28:15,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:28:16,293 INFO L225 Difference]: With dead ends: 152890 [2023-02-18 07:28:16,294 INFO L226 Difference]: Without dead ends: 94897 [2023-02-18 07:28:16,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 504 SyntacticMatches, 30 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1557, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 07:28:16,896 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 112 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 07:28:16,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 283 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 07:28:16,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94897 states.