./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 c3fed411 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-tmp.no-commuhash-c3fed41 [2021-12-19 14:58:52,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-19 14:58:52,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-19 14:58:52,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-19 14:58:52,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-19 14:58:52,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-19 14:58:52,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-19 14:58:52,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-19 14:58:52,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-19 14:58:52,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-19 14:58:52,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-19 14:58:52,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-19 14:58:52,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-19 14:58:52,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-19 14:58:52,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-19 14:58:52,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-19 14:58:52,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-19 14:58:52,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-19 14:58:52,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-19 14:58:52,664 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-19 14:58:52,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-19 14:58:52,666 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-19 14:58:52,667 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-19 14:58:52,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-19 14:58:52,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-19 14:58:52,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-19 14:58:52,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-19 14:58:52,671 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-19 14:58:52,671 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-19 14:58:52,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-19 14:58:52,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-19 14:58:52,672 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-19 14:58:52,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-19 14:58:52,674 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-19 14:58:52,675 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-19 14:58:52,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-19 14:58:52,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-19 14:58:52,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-19 14:58:52,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-19 14:58:52,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-19 14:58:52,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-19 14:58:52,677 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-12-19 14:58:52,703 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-19 14:58:52,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-19 14:58:52,703 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-19 14:58:52,704 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-19 14:58:52,704 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-19 14:58:52,704 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-19 14:58:52,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-19 14:58:52,705 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-19 14:58:52,705 INFO L138 SettingsManager]: * Use SBE=true [2021-12-19 14:58:52,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-19 14:58:52,706 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-19 14:58:52,706 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-19 14:58:52,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-19 14:58:52,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-19 14:58:52,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-19 14:58:52,707 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-19 14:58:52,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-19 14:58:52,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-19 14:58:52,707 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-19 14:58:52,707 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-19 14:58:52,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-19 14:58:52,707 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-19 14:58:52,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-19 14:58:52,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-19 14:58:52,708 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-19 14:58:52,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-19 14:58:52,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-19 14:58:52,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-19 14:58:52,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-19 14:58:52,709 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-19 14:58:52,710 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-19 14:58:52,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-19 14:58:52,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-19 14:58:52,710 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-19 14:58:52,710 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20c02b81d1b1bc312ccc75d6e9b31c6252d69e8a6e2560afe3a2a95a3e53102a [2021-12-19 14:58:52,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-19 14:58:52,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-19 14:58:52,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-19 14:58:52,924 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-19 14:58:52,924 INFO L275 PluginConnector]: CDTParser initialized [2021-12-19 14:58:52,925 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann02.c [2021-12-19 14:58:52,983 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c4e02c0d/ff2a7c4ab15b4f7489e05a075875fc05/FLAG65cecd0d2 [2021-12-19 14:58:53,335 INFO L306 CDTParser]: Found 1 translation units. [2021-12-19 14:58:53,335 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann02.c [2021-12-19 14:58:53,343 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c4e02c0d/ff2a7c4ab15b4f7489e05a075875fc05/FLAG65cecd0d2 [2021-12-19 14:58:53,359 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c4e02c0d/ff2a7c4ab15b4f7489e05a075875fc05 [2021-12-19 14:58:53,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-19 14:58:53,362 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-19 14:58:53,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-19 14:58:53,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-19 14:58:53,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-19 14:58:53,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 02:58:53" (1/1) ... [2021-12-19 14:58:53,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23cd4e45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:58:53, skipping insertion in model container [2021-12-19 14:58:53,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 02:58:53" (1/1) ... [2021-12-19 14:58:53,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-19 14:58:53,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-19 14:58:53,517 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann02.c[1157,1170] [2021-12-19 14:58:53,518 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-19 14:58:53,524 INFO L203 MainTranslator]: Completed pre-run [2021-12-19 14:58:53,542 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann02.c[1157,1170] [2021-12-19 14:58:53,545 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-19 14:58:53,554 INFO L208 MainTranslator]: Completed translation [2021-12-19 14:58:53,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:58:53 WrapperNode [2021-12-19 14:58:53,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-19 14:58:53,556 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-19 14:58:53,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-19 14:58:53,557 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-19 14:58:53,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:58:53" (1/1) ... [2021-12-19 14:58:53,566 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:58:53" (1/1) ... [2021-12-19 14:58:53,578 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2021-12-19 14:58:53,578 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-19 14:58:53,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-19 14:58:53,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-19 14:58:53,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-19 14:58:53,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:58:53" (1/1) ... [2021-12-19 14:58:53,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:58:53" (1/1) ... [2021-12-19 14:58:53,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:58:53" (1/1) ... [2021-12-19 14:58:53,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:58:53" (1/1) ... [2021-12-19 14:58:53,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:58:53" (1/1) ... [2021-12-19 14:58:53,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:58:53" (1/1) ... [2021-12-19 14:58:53,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:58:53" (1/1) ... [2021-12-19 14:58:53,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-19 14:58:53,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-19 14:58:53,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-19 14:58:53,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-19 14:58:53,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:58:53" (1/1) ... [2021-12-19 14:58:53,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-19 14:58:53,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:58:53,635 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) [2021-12-19 14:58:53,651 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 [2021-12-19 14:58:53,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-19 14:58:53,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-19 14:58:53,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-19 14:58:53,674 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2021-12-19 14:58:53,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2021-12-19 14:58:53,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-19 14:58:53,749 INFO L236 CfgBuilder]: Building ICFG [2021-12-19 14:58:53,751 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-19 14:58:53,919 INFO L277 CfgBuilder]: Performing block encoding [2021-12-19 14:58:53,924 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-19 14:58:53,924 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-19 14:58:53,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 02:58:53 BoogieIcfgContainer [2021-12-19 14:58:53,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-19 14:58:53,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-19 14:58:53,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-19 14:58:53,949 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-19 14:58:53,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 02:58:53" (1/3) ... [2021-12-19 14:58:53,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e9332a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 02:58:53, skipping insertion in model container [2021-12-19 14:58:53,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:58:53" (2/3) ... [2021-12-19 14:58:53,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e9332a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 02:58:53, skipping insertion in model container [2021-12-19 14:58:53,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 02:58:53" (3/3) ... [2021-12-19 14:58:53,951 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann02.c [2021-12-19 14:58:53,954 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-19 14:58:53,954 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-12-19 14:58:54,018 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-19 14:58:54,027 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-19 14:58:54,027 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-12-19 14:58:54,056 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) [2021-12-19 14:58:54,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-19 14:58:54,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:58:54,059 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:58:54,060 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:58:54,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:58:54,068 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2021-12-19 14:58:54,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:58:54,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374730113] [2021-12-19 14:58:54,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:58:54,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:58:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:58:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:58:54,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:58:54,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374730113] [2021-12-19 14:58:54,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374730113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 14:58:54,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 14:58:54,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-19 14:58:54,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461818959] [2021-12-19 14:58:54,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:58:54,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-19 14:58:54,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:58:54,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-19 14:58:54,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-19 14:58:54,290 INFO L87 Difference]: Start difference. First operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:58:54,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:58:54,429 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-12-19 14:58:54,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-19 14:58:54,431 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-19 14:58:54,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:58:54,464 INFO L225 Difference]: With dead ends: 73 [2021-12-19 14:58:54,465 INFO L226 Difference]: Without dead ends: 59 [2021-12-19 14:58:54,467 INFO L932 BasicCegarLoop]: 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 [2021-12-19 14:58:54,469 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 55 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:58:54,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 131 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:58:54,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-19 14:58:54,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2021-12-19 14:58:54,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 42 states have internal predecessors, (52), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-19 14:58:54,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2021-12-19 14:58:54,507 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2021-12-19 14:58:54,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:58:54,507 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2021-12-19 14:58:54,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:58:54,508 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2021-12-19 14:58:54,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-19 14:58:54,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:58:54,508 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:58:54,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-19 14:58:54,509 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:58:54,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:58:54,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2021-12-19 14:58:54,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:58:54,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179610985] [2021-12-19 14:58:54,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:58:54,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:58:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:58:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:58:54,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:58:54,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179610985] [2021-12-19 14:58:54,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179610985] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 14:58:54,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 14:58:54,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-19 14:58:54,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105114720] [2021-12-19 14:58:54,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:58:54,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-19 14:58:54,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:58:54,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-19 14:58:54,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-19 14:58:54,575 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:58:54,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:58:54,635 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-12-19 14:58:54,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-19 14:58:54,636 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 [2021-12-19 14:58:54,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:58:54,637 INFO L225 Difference]: With dead ends: 51 [2021-12-19 14:58:54,637 INFO L226 Difference]: Without dead ends: 49 [2021-12-19 14:58:54,638 INFO L932 BasicCegarLoop]: 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 [2021-12-19 14:58:54,639 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-19 14:58:54,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 47 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-19 14:58:54,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-19 14:58:54,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-19 14:58:54,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.411764705882353) internal successors, (48), 40 states have internal predecessors, (48), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-19 14:58:54,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2021-12-19 14:58:54,648 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 9 [2021-12-19 14:58:54,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:58:54,649 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2021-12-19 14:58:54,649 INFO L471 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) [2021-12-19 14:58:54,649 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2021-12-19 14:58:54,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-19 14:58:54,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:58:54,650 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:58:54,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-19 14:58:54,650 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:58:54,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:58:54,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2021-12-19 14:58:54,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:58:54,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796838277] [2021-12-19 14:58:54,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:58:54,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:58:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:58:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:58:54,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:58:54,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796838277] [2021-12-19 14:58:54,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796838277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 14:58:54,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 14:58:54,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-19 14:58:54,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958392193] [2021-12-19 14:58:54,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:58:54,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-19 14:58:54,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:58:54,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-19 14:58:54,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-19 14:58:54,687 INFO L87 Difference]: Start difference. First operand 49 states and 61 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) [2021-12-19 14:58:54,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:58:54,745 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-12-19 14:58:54,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-19 14:58:54,746 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 [2021-12-19 14:58:54,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:58:54,748 INFO L225 Difference]: With dead ends: 76 [2021-12-19 14:58:54,748 INFO L226 Difference]: Without dead ends: 74 [2021-12-19 14:58:54,749 INFO L932 BasicCegarLoop]: 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 [2021-12-19 14:58:54,750 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 39 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-19 14:58:54,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 104 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-19 14:58:54,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-19 14:58:54,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-12-19 14:58:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 55 states have internal predecessors, (67), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-19 14:58:54,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2021-12-19 14:58:54,764 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 9 [2021-12-19 14:58:54,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:58:54,764 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2021-12-19 14:58:54,764 INFO L471 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) [2021-12-19 14:58:54,764 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2021-12-19 14:58:54,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-19 14:58:54,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:58:54,765 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:58:54,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-19 14:58:54,766 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:58:54,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:58:54,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2021-12-19 14:58:54,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:58:54,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764246517] [2021-12-19 14:58:54,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:58:54,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:58:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:58:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:58:54,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:58:54,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764246517] [2021-12-19 14:58:54,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764246517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 14:58:54,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 14:58:54,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-19 14:58:54,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929002553] [2021-12-19 14:58:54,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:58:54,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-19 14:58:54,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:58:54,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-19 14:58:54,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-19 14:58:54,804 INFO L87 Difference]: Start difference. First operand 68 states and 86 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) [2021-12-19 14:58:54,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:58:54,864 INFO L93 Difference]: Finished difference Result 116 states and 154 transitions. [2021-12-19 14:58:54,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-19 14:58:54,865 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 [2021-12-19 14:58:54,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:58:54,866 INFO L225 Difference]: With dead ends: 116 [2021-12-19 14:58:54,867 INFO L226 Difference]: Without dead ends: 108 [2021-12-19 14:58:54,867 INFO L932 BasicCegarLoop]: 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 [2021-12-19 14:58:54,868 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 39 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-19 14:58:54,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 103 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-19 14:58:54,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-19 14:58:54,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2021-12-19 14:58:54,887 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) [2021-12-19 14:58:54,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2021-12-19 14:58:54,891 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 10 [2021-12-19 14:58:54,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:58:54,891 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2021-12-19 14:58:54,891 INFO L471 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) [2021-12-19 14:58:54,892 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2021-12-19 14:58:54,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-19 14:58:54,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:58:54,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:58:54,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-19 14:58:54,893 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:58:54,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:58:54,894 INFO L85 PathProgramCache]: Analyzing trace with hash 219392943, now seen corresponding path program 1 times [2021-12-19 14:58:54,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:58:54,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794394123] [2021-12-19 14:58:54,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:58:54,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:58:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:58:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:58:54,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:58:54,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794394123] [2021-12-19 14:58:54,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794394123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 14:58:54,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 14:58:54,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-19 14:58:54,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188463673] [2021-12-19 14:58:54,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:58:54,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-19 14:58:54,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:58:54,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-19 14:58:54,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-19 14:58:54,933 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:58:54,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:58:54,984 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2021-12-19 14:58:54,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-19 14:58:54,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-19 14:58:54,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:58:54,986 INFO L225 Difference]: With dead ends: 168 [2021-12-19 14:58:54,987 INFO L226 Difference]: Without dead ends: 97 [2021-12-19 14:58:54,988 INFO L932 BasicCegarLoop]: 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 [2021-12-19 14:58:54,989 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-19 14:58:54,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 89 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-19 14:58:54,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-19 14:58:54,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-12-19 14:58:54,997 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) [2021-12-19 14:58:54,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2021-12-19 14:58:54,998 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 16 [2021-12-19 14:58:54,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:58:54,998 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2021-12-19 14:58:54,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:58:54,998 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2021-12-19 14:58:54,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-19 14:58:54,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:58:54,999 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:58:54,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-19 14:58:54,999 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:58:54,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:58:55,000 INFO L85 PathProgramCache]: Analyzing trace with hash 219399894, now seen corresponding path program 1 times [2021-12-19 14:58:55,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:58:55,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759198157] [2021-12-19 14:58:55,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:58:55,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:58:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:58:55,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:58:55,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:58:55,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759198157] [2021-12-19 14:58:55,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759198157] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:58:55,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410980504] [2021-12-19 14:58:55,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:58:55,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:58:55,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:58:55,065 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) [2021-12-19 14:58:55,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-19 14:58:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:58:55,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-19 14:58:55,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:58:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:58:55,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:58:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:58:55,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410980504] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:58:55,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:58:55,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-19 14:58:55,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321920502] [2021-12-19 14:58:55,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:58:55,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-19 14:58:55,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:58:55,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-19 14:58:55,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-19 14:58:55,260 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:58:55,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:58:55,544 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2021-12-19 14:58:55,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-19 14:58:55,545 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-19 14:58:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:58:55,548 INFO L225 Difference]: With dead ends: 274 [2021-12-19 14:58:55,548 INFO L226 Difference]: Without dead ends: 272 [2021-12-19 14:58:55,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-12-19 14:58:55,550 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 250 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-19 14:58:55,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 180 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-19 14:58:55,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-19 14:58:55,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2021-12-19 14:58:55,574 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) [2021-12-19 14:58:55,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2021-12-19 14:58:55,580 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 16 [2021-12-19 14:58:55,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:58:55,580 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2021-12-19 14:58:55,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:58:55,581 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2021-12-19 14:58:55,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-19 14:58:55,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:58:55,582 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:58:55,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-19 14:58:55,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-19 14:58:55,798 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:58:55,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:58:55,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1162887243, now seen corresponding path program 1 times [2021-12-19 14:58:55,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:58:55,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428203131] [2021-12-19 14:58:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:58:55,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:58:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:58:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:58:55,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:58:55,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428203131] [2021-12-19 14:58:55,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428203131] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:58:55,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716968658] [2021-12-19 14:58:55,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:58:55,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:58:55,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:58:55,850 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) [2021-12-19 14:58:55,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-19 14:58:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:58:55,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-19 14:58:55,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:58:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:58:55,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:58:56,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:58:56,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716968658] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:58:56,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:58:56,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-19 14:58:56,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011234691] [2021-12-19 14:58:56,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:58:56,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-19 14:58:56,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:58:56,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-19 14:58:56,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-19 14:58:56,005 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 12 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 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) [2021-12-19 14:58:56,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:58:56,212 INFO L93 Difference]: Finished difference Result 512 states and 695 transitions. [2021-12-19 14:58:56,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-19 14:58:56,213 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 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 17 [2021-12-19 14:58:56,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:58:56,216 INFO L225 Difference]: With dead ends: 512 [2021-12-19 14:58:56,216 INFO L226 Difference]: Without dead ends: 510 [2021-12-19 14:58:56,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-12-19 14:58:56,217 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 196 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:58:56,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 194 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:58:56,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-12-19 14:58:56,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 445. [2021-12-19 14:58:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 347 states have (on average 1.2276657060518732) internal successors, (426), 354 states have internal predecessors, (426), 69 states have call successors, (69), 24 states have call predecessors, (69), 23 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-12-19 14:58:56,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 561 transitions. [2021-12-19 14:58:56,244 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 561 transitions. Word has length 17 [2021-12-19 14:58:56,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:58:56,244 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 561 transitions. [2021-12-19 14:58:56,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 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) [2021-12-19 14:58:56,244 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 561 transitions. [2021-12-19 14:58:56,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-19 14:58:56,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:58:56,245 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:58:56,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-19 14:58:56,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-19 14:58:56,446 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:58:56,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:58:56,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2021-12-19 14:58:56,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:58:56,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296579351] [2021-12-19 14:58:56,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:58:56,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:58:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:58:56,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 14:58:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:58:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-19 14:58:56,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:58:56,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296579351] [2021-12-19 14:58:56,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296579351] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:58:56,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695753039] [2021-12-19 14:58:56,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:58:56,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:58:56,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:58:56,490 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) [2021-12-19 14:58:56,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-19 14:58:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:58:56,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-19 14:58:56,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:58:56,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-19 14:58:56,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:58:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-19 14:58:56,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695753039] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:58:56,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:58:56,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2021-12-19 14:58:56,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093054414] [2021-12-19 14:58:56,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:58:56,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-19 14:58:56,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:58:56,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-19 14:58:56,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-12-19 14:58:56,759 INFO L87 Difference]: Start difference. First operand 445 states and 561 transitions. Second operand has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-19 14:58:57,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:58:57,245 INFO L93 Difference]: Finished difference Result 1122 states and 1582 transitions. [2021-12-19 14:58:57,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-19 14:58:57,245 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2021-12-19 14:58:57,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:58:57,249 INFO L225 Difference]: With dead ends: 1122 [2021-12-19 14:58:57,249 INFO L226 Difference]: Without dead ends: 781 [2021-12-19 14:58:57,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2021-12-19 14:58:57,252 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 282 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-19 14:58:57,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 98 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-19 14:58:57,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-12-19 14:58:57,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 585. [2021-12-19 14:58:57,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 455 states have (on average 1.2175824175824175) internal successors, (554), 475 states have internal predecessors, (554), 86 states have call successors, (86), 36 states have call predecessors, (86), 38 states have return successors, (90), 73 states have call predecessors, (90), 66 states have call successors, (90) [2021-12-19 14:58:57,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 730 transitions. [2021-12-19 14:58:57,286 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 730 transitions. Word has length 24 [2021-12-19 14:58:57,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:58:57,286 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 730 transitions. [2021-12-19 14:58:57,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-19 14:58:57,287 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 730 transitions. [2021-12-19 14:58:57,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-19 14:58:57,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:58:57,288 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-19 14:58:57,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-19 14:58:57,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:58:57,507 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:58:57,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:58:57,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1403347671, now seen corresponding path program 1 times [2021-12-19 14:58:57,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:58:57,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904515882] [2021-12-19 14:58:57,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:58:57,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:58:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:58:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:58:57,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:58:57,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904515882] [2021-12-19 14:58:57,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904515882] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:58:57,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473926767] [2021-12-19 14:58:57,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:58:57,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:58:57,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:58:57,559 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) [2021-12-19 14:58:57,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-19 14:58:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:58:57,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-19 14:58:57,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:58:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:58:57,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:58:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:58:57,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473926767] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:58:57,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:58:57,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-12-19 14:58:57,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623472405] [2021-12-19 14:58:57,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:58:57,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-19 14:58:57,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:58:57,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-19 14:58:57,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-12-19 14:58:57,710 INFO L87 Difference]: Start difference. First operand 585 states and 730 transitions. Second operand has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 10 states have internal predecessors, (47), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:58:57,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:58:57,943 INFO L93 Difference]: Finished difference Result 1053 states and 1343 transitions. [2021-12-19 14:58:57,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-19 14:58:57,943 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 10 states have internal predecessors, (47), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-19 14:58:57,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:58:57,947 INFO L225 Difference]: With dead ends: 1053 [2021-12-19 14:58:57,947 INFO L226 Difference]: Without dead ends: 1052 [2021-12-19 14:58:57,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2021-12-19 14:58:57,949 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 309 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:58:57,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 249 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:58:57,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-12-19 14:58:57,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 901. [2021-12-19 14:58:57,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 703 states have (on average 1.1806543385490753) internal successors, (830), 735 states have internal predecessors, (830), 130 states have call successors, (130), 56 states have call predecessors, (130), 62 states have return successors, (138), 109 states have call predecessors, (138), 102 states have call successors, (138) [2021-12-19 14:58:57,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1098 transitions. [2021-12-19 14:58:57,989 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1098 transitions. Word has length 28 [2021-12-19 14:58:57,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:58:57,990 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 1098 transitions. [2021-12-19 14:58:57,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 10 states have internal predecessors, (47), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:58:57,991 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1098 transitions. [2021-12-19 14:58:57,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-19 14:58:57,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:58:57,994 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:58:58,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-19 14:58:58,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:58:58,203 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:58:58,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:58:58,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1583952330, now seen corresponding path program 1 times [2021-12-19 14:58:58,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:58:58,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832385115] [2021-12-19 14:58:58,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:58:58,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:58:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:58:58,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 14:58:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:58:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-19 14:58:58,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:58:58,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832385115] [2021-12-19 14:58:58,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832385115] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:58:58,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451927605] [2021-12-19 14:58:58,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:58:58,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:58:58,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:58:58,276 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) [2021-12-19 14:58:58,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-19 14:58:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:58:58,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-19 14:58:58,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:58:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-19 14:58:58,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:58:58,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-19 14:58:58,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451927605] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:58:58,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:58:58,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-12-19 14:58:58,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951705135] [2021-12-19 14:58:58,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:58:58,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-19 14:58:58,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:58:58,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-19 14:58:58,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-19 14:58:58,476 INFO L87 Difference]: Start difference. First operand 901 states and 1098 transitions. Second operand has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-19 14:58:58,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:58:58,685 INFO L93 Difference]: Finished difference Result 1027 states and 1299 transitions. [2021-12-19 14:58:58,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-19 14:58:58,685 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-12-19 14:58:58,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:58:58,691 INFO L225 Difference]: With dead ends: 1027 [2021-12-19 14:58:58,691 INFO L226 Difference]: Without dead ends: 1026 [2021-12-19 14:58:58,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-12-19 14:58:58,693 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 119 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:58:58,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 126 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:58:58,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-12-19 14:58:58,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 943. [2021-12-19 14:58:58,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 740 states have (on average 1.1824324324324325) internal successors, (875), 768 states have internal predecessors, (875), 135 states have call successors, (135), 61 states have call predecessors, (135), 62 states have return successors, (138), 113 states have call predecessors, (138), 102 states have call successors, (138) [2021-12-19 14:58:58,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1148 transitions. [2021-12-19 14:58:58,743 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1148 transitions. Word has length 28 [2021-12-19 14:58:58,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:58:58,743 INFO L470 AbstractCegarLoop]: Abstraction has 943 states and 1148 transitions. [2021-12-19 14:58:58,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-19 14:58:58,744 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1148 transitions. [2021-12-19 14:58:58,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-19 14:58:58,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:58:58,745 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:58:58,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-19 14:58:58,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-19 14:58:58,964 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:58:58,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:58:58,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1777813581, now seen corresponding path program 1 times [2021-12-19 14:58:58,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:58:58,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821143280] [2021-12-19 14:58:58,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:58:58,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:58:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:58:59,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 14:58:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:58:59,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:58:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:58:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:58:59,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:58:59,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821143280] [2021-12-19 14:58:59,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821143280] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:58:59,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213624431] [2021-12-19 14:58:59,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:58:59,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:58:59,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:58:59,069 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) [2021-12-19 14:58:59,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-19 14:58:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:58:59,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-19 14:58:59,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:58:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:58:59,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:58:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:58:59,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213624431] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:58:59,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:58:59,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-12-19 14:58:59,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457829705] [2021-12-19 14:58:59,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:58:59,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-19 14:58:59,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:58:59,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-19 14:58:59,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-19 14:58:59,314 INFO L87 Difference]: Start difference. First operand 943 states and 1148 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-19 14:58:59,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:58:59,753 INFO L93 Difference]: Finished difference Result 1435 states and 2099 transitions. [2021-12-19 14:58:59,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-19 14:58:59,754 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-12-19 14:58:59,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:58:59,762 INFO L225 Difference]: With dead ends: 1435 [2021-12-19 14:58:59,763 INFO L226 Difference]: Without dead ends: 1433 [2021-12-19 14:58:59,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-12-19 14:58:59,765 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 143 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-19 14:58:59,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 208 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-19 14:58:59,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2021-12-19 14:58:59,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1237. [2021-12-19 14:58:59,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 932 states have (on average 1.1727467811158798) internal successors, (1093), 971 states have internal predecessors, (1093), 192 states have call successors, (192), 68 states have call predecessors, (192), 107 states have return successors, (366), 197 states have call predecessors, (366), 158 states have call successors, (366) [2021-12-19 14:58:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1651 transitions. [2021-12-19 14:58:59,844 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1651 transitions. Word has length 33 [2021-12-19 14:58:59,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:58:59,845 INFO L470 AbstractCegarLoop]: Abstraction has 1237 states and 1651 transitions. [2021-12-19 14:58:59,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-19 14:58:59,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1651 transitions. [2021-12-19 14:58:59,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-19 14:58:59,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:58:59,846 INFO L514 BasicCegarLoop]: 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] [2021-12-19 14:58:59,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:00,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:00,065 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:00,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:00,066 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2021-12-19 14:59:00,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:00,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590647967] [2021-12-19 14:59:00,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:00,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:00,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 14:59:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:00,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:00,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:00,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590647967] [2021-12-19 14:59:00,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590647967] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:00,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585796814] [2021-12-19 14:59:00,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:00,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:00,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:00,131 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) [2021-12-19 14:59:00,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-19 14:59:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:00,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-19 14:59:00,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:00,225 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:00,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:00,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585796814] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:00,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-19 14:59:00,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2021-12-19 14:59:00,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144117024] [2021-12-19 14:59:00,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:59:00,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-19 14:59:00,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:00,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-19 14:59:00,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-12-19 14:59:00,393 INFO L87 Difference]: Start difference. First operand 1237 states and 1651 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-19 14:59:00,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:00,537 INFO L93 Difference]: Finished difference Result 1303 states and 1719 transitions. [2021-12-19 14:59:00,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-19 14:59:00,537 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2021-12-19 14:59:00,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:00,542 INFO L225 Difference]: With dead ends: 1303 [2021-12-19 14:59:00,542 INFO L226 Difference]: Without dead ends: 1302 [2021-12-19 14:59:00,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-12-19 14:59:00,543 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 45 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:00,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 125 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:59:00,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-12-19 14:59:00,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1236. [2021-12-19 14:59:00,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 932 states have (on average 1.1641630901287554) internal successors, (1085), 970 states have internal predecessors, (1085), 192 states have call successors, (192), 68 states have call predecessors, (192), 107 states have return successors, (366), 197 states have call predecessors, (366), 158 states have call successors, (366) [2021-12-19 14:59:00,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1643 transitions. [2021-12-19 14:59:00,591 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1643 transitions. Word has length 34 [2021-12-19 14:59:00,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:00,591 INFO L470 AbstractCegarLoop]: Abstraction has 1236 states and 1643 transitions. [2021-12-19 14:59:00,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-19 14:59:00,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1643 transitions. [2021-12-19 14:59:00,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-19 14:59:00,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:00,592 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:00,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:00,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:00,807 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:00,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:00,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1699542727, now seen corresponding path program 1 times [2021-12-19 14:59:00,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:00,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475986388] [2021-12-19 14:59:00,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:00,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:00,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 14:59:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:00,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:00,875 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:00,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:00,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475986388] [2021-12-19 14:59:00,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475986388] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:00,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093047209] [2021-12-19 14:59:00,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:00,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:00,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:00,882 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) [2021-12-19 14:59:00,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-19 14:59:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:00,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-19 14:59:00,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:00,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:01,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093047209] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:01,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-19 14:59:01,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2021-12-19 14:59:01,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938778885] [2021-12-19 14:59:01,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:59:01,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-19 14:59:01,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:01,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-19 14:59:01,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-12-19 14:59:01,165 INFO L87 Difference]: Start difference. First operand 1236 states and 1643 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-19 14:59:01,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:01,393 INFO L93 Difference]: Finished difference Result 1343 states and 1866 transitions. [2021-12-19 14:59:01,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-19 14:59:01,394 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2021-12-19 14:59:01,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:01,399 INFO L225 Difference]: With dead ends: 1343 [2021-12-19 14:59:01,399 INFO L226 Difference]: Without dead ends: 1342 [2021-12-19 14:59:01,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-12-19 14:59:01,401 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 65 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:01,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 176 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:59:01,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-12-19 14:59:01,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1244. [2021-12-19 14:59:01,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 940 states have (on average 1.1595744680851063) internal successors, (1090), 974 states have internal predecessors, (1090), 196 states have call successors, (196), 68 states have call predecessors, (196), 103 states have return successors, (290), 201 states have call predecessors, (290), 162 states have call successors, (290) [2021-12-19 14:59:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1576 transitions. [2021-12-19 14:59:01,445 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1576 transitions. Word has length 37 [2021-12-19 14:59:01,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:01,446 INFO L470 AbstractCegarLoop]: Abstraction has 1244 states and 1576 transitions. [2021-12-19 14:59:01,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-19 14:59:01,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1576 transitions. [2021-12-19 14:59:01,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-19 14:59:01,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:01,447 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:01,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:01,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-19 14:59:01,663 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:01,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:01,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1975915362, now seen corresponding path program 2 times [2021-12-19 14:59:01,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:01,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478862817] [2021-12-19 14:59:01,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:01,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:01,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-19 14:59:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:01,739 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-19 14:59:01,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:01,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478862817] [2021-12-19 14:59:01,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478862817] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:01,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897773817] [2021-12-19 14:59:01,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 14:59:01,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:01,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:01,741 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) [2021-12-19 14:59:01,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-19 14:59:01,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 14:59:01,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 14:59:01,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-19 14:59:01,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:01,876 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-19 14:59:01,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-19 14:59:02,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897773817] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:02,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:02,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2021-12-19 14:59:02,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444269334] [2021-12-19 14:59:02,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:02,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-19 14:59:02,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:02,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-19 14:59:02,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-12-19 14:59:02,074 INFO L87 Difference]: Start difference. First operand 1244 states and 1576 transitions. Second operand has 23 states, 20 states have (on average 3.15) internal successors, (63), 17 states have internal predecessors, (63), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-19 14:59:02,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:02,493 INFO L93 Difference]: Finished difference Result 1537 states and 1982 transitions. [2021-12-19 14:59:02,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-19 14:59:02,494 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.15) internal successors, (63), 17 states have internal predecessors, (63), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-19 14:59:02,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:02,498 INFO L225 Difference]: With dead ends: 1537 [2021-12-19 14:59:02,498 INFO L226 Difference]: Without dead ends: 1536 [2021-12-19 14:59:02,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=420, Invalid=1302, Unknown=0, NotChecked=0, Total=1722 [2021-12-19 14:59:02,500 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 333 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:02,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 202 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-19 14:59:02,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-12-19 14:59:02,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1281. [2021-12-19 14:59:02,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 970 states have (on average 1.1597938144329898) internal successors, (1125), 1003 states have internal predecessors, (1125), 203 states have call successors, (203), 72 states have call predecessors, (203), 103 states have return successors, (290), 205 states have call predecessors, (290), 162 states have call successors, (290) [2021-12-19 14:59:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1618 transitions. [2021-12-19 14:59:02,538 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1618 transitions. Word has length 44 [2021-12-19 14:59:02,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:02,538 INFO L470 AbstractCegarLoop]: Abstraction has 1281 states and 1618 transitions. [2021-12-19 14:59:02,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.15) internal successors, (63), 17 states have internal predecessors, (63), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-19 14:59:02,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1618 transitions. [2021-12-19 14:59:02,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-19 14:59:02,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:02,540 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:02,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:02,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-19 14:59:02,756 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:02,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:02,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1560392739, now seen corresponding path program 2 times [2021-12-19 14:59:02,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:02,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570763029] [2021-12-19 14:59:02,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:02,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:02,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 14:59:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:02,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:02,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:02,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570763029] [2021-12-19 14:59:02,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570763029] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:02,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015240234] [2021-12-19 14:59:02,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 14:59:02,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:02,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:02,835 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) [2021-12-19 14:59:02,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-19 14:59:02,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 14:59:02,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 14:59:02,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-19 14:59:02,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:02,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:03,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015240234] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:03,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:03,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2021-12-19 14:59:03,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632135368] [2021-12-19 14:59:03,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:03,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-19 14:59:03,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:03,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-19 14:59:03,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-12-19 14:59:03,183 INFO L87 Difference]: Start difference. First operand 1281 states and 1618 transitions. Second operand has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-19 14:59:04,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:04,082 INFO L93 Difference]: Finished difference Result 2805 states and 4077 transitions. [2021-12-19 14:59:04,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-19 14:59:04,085 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 45 [2021-12-19 14:59:04,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:04,094 INFO L225 Difference]: With dead ends: 2805 [2021-12-19 14:59:04,094 INFO L226 Difference]: Without dead ends: 1937 [2021-12-19 14:59:04,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=586, Invalid=1964, Unknown=0, NotChecked=0, Total=2550 [2021-12-19 14:59:04,100 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 225 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:04,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 304 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-19 14:59:04,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-12-19 14:59:04,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1461. [2021-12-19 14:59:04,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1108 states have (on average 1.1498194945848375) internal successors, (1274), 1147 states have internal predecessors, (1274), 227 states have call successors, (227), 86 states have call predecessors, (227), 121 states have return successors, (328), 227 states have call predecessors, (328), 181 states have call successors, (328) [2021-12-19 14:59:04,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 1829 transitions. [2021-12-19 14:59:04,171 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 1829 transitions. Word has length 45 [2021-12-19 14:59:04,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:04,171 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 1829 transitions. [2021-12-19 14:59:04,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-19 14:59:04,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 1829 transitions. [2021-12-19 14:59:04,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-19 14:59:04,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:04,174 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:04,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:04,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-19 14:59:04,390 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:04,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:04,390 INFO L85 PathProgramCache]: Analyzing trace with hash -242379077, now seen corresponding path program 1 times [2021-12-19 14:59:04,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:04,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254516959] [2021-12-19 14:59:04,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:04,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:04,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-19 14:59:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-19 14:59:04,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:04,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254516959] [2021-12-19 14:59:04,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254516959] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:04,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899924391] [2021-12-19 14:59:04,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:04,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:04,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:04,472 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) [2021-12-19 14:59:04,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-19 14:59:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:04,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-19 14:59:04,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-19 14:59:04,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-19 14:59:04,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899924391] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:04,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:04,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2021-12-19 14:59:04,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798592548] [2021-12-19 14:59:04,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:04,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-19 14:59:04,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:04,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-19 14:59:04,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-12-19 14:59:04,758 INFO L87 Difference]: Start difference. First operand 1461 states and 1829 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-19 14:59:05,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:05,232 INFO L93 Difference]: Finished difference Result 1895 states and 2483 transitions. [2021-12-19 14:59:05,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-19 14:59:05,232 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2021-12-19 14:59:05,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:05,238 INFO L225 Difference]: With dead ends: 1895 [2021-12-19 14:59:05,238 INFO L226 Difference]: Without dead ends: 1824 [2021-12-19 14:59:05,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2021-12-19 14:59:05,239 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 198 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:05,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 75 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-19 14:59:05,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-12-19 14:59:05,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1397. [2021-12-19 14:59:05,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1056 states have (on average 1.1410984848484849) internal successors, (1205), 1099 states have internal predecessors, (1205), 216 states have call successors, (216), 79 states have call predecessors, (216), 121 states have return successors, (328), 218 states have call predecessors, (328), 181 states have call successors, (328) [2021-12-19 14:59:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 1749 transitions. [2021-12-19 14:59:05,287 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 1749 transitions. Word has length 52 [2021-12-19 14:59:05,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:05,288 INFO L470 AbstractCegarLoop]: Abstraction has 1397 states and 1749 transitions. [2021-12-19 14:59:05,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-19 14:59:05,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 1749 transitions. [2021-12-19 14:59:05,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-19 14:59:05,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:05,289 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:05,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:05,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-19 14:59:05,506 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:05,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:05,506 INFO L85 PathProgramCache]: Analyzing trace with hash 442862615, now seen corresponding path program 1 times [2021-12-19 14:59:05,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:05,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148746806] [2021-12-19 14:59:05,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:05,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:05,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 14:59:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:05,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 14:59:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:05,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:05,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 14:59:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:05,633 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-19 14:59:05,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:05,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148746806] [2021-12-19 14:59:05,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148746806] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:05,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675758090] [2021-12-19 14:59:05,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:05,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:05,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:05,635 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) [2021-12-19 14:59:05,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-19 14:59:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:05,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-19 14:59:05,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-19 14:59:05,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-19 14:59:06,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675758090] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:06,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:06,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2021-12-19 14:59:06,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485104384] [2021-12-19 14:59:06,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:06,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-19 14:59:06,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:06,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-19 14:59:06,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-12-19 14:59:06,134 INFO L87 Difference]: Start difference. First operand 1397 states and 1749 transitions. Second operand has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-19 14:59:07,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:07,408 INFO L93 Difference]: Finished difference Result 3379 states and 6003 transitions. [2021-12-19 14:59:07,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-19 14:59:07,420 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 52 [2021-12-19 14:59:07,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:07,446 INFO L225 Difference]: With dead ends: 3379 [2021-12-19 14:59:07,446 INFO L226 Difference]: Without dead ends: 3377 [2021-12-19 14:59:07,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1158, Invalid=5004, Unknown=0, NotChecked=0, Total=6162 [2021-12-19 14:59:07,451 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 171 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 530 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 530 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:07,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 238 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [530 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-19 14:59:07,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3377 states. [2021-12-19 14:59:07,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3377 to 2467. [2021-12-19 14:59:07,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2467 states, 1731 states have (on average 1.1103408434430966) internal successors, (1922), 1777 states have internal predecessors, (1922), 433 states have call successors, (433), 93 states have call predecessors, (433), 299 states have return successors, (2469), 596 states have call predecessors, (2469), 396 states have call successors, (2469) [2021-12-19 14:59:07,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 4824 transitions. [2021-12-19 14:59:07,636 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 4824 transitions. Word has length 52 [2021-12-19 14:59:07,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:07,637 INFO L470 AbstractCegarLoop]: Abstraction has 2467 states and 4824 transitions. [2021-12-19 14:59:07,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-19 14:59:07,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 4824 transitions. [2021-12-19 14:59:07,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-19 14:59:07,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:07,639 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:07,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:07,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-19 14:59:07,855 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:07,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:07,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1991697283, now seen corresponding path program 1 times [2021-12-19 14:59:07,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:07,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197138489] [2021-12-19 14:59:07,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:07,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-19 14:59:07,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:07,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197138489] [2021-12-19 14:59:07,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197138489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:07,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257551700] [2021-12-19 14:59:07,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:07,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:07,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:07,956 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:59:07,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-19 14:59:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:07,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-19 14:59:07,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-19 14:59:08,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:08,277 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-19 14:59:08,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257551700] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:08,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:08,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-12-19 14:59:08,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002914356] [2021-12-19 14:59:08,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:08,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-19 14:59:08,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:08,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-19 14:59:08,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-12-19 14:59:08,279 INFO L87 Difference]: Start difference. First operand 2467 states and 4824 transitions. Second operand has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:08,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:08,958 INFO L93 Difference]: Finished difference Result 7309 states and 13959 transitions. [2021-12-19 14:59:08,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-19 14:59:08,958 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-19 14:59:08,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:09,004 INFO L225 Difference]: With dead ends: 7309 [2021-12-19 14:59:09,004 INFO L226 Difference]: Without dead ends: 7308 [2021-12-19 14:59:09,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2021-12-19 14:59:09,010 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 875 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:09,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 341 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-19 14:59:09,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7308 states. [2021-12-19 14:59:09,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7308 to 6715. [2021-12-19 14:59:09,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6715 states, 4743 states have (on average 1.1123761332489985) internal successors, (5276), 4849 states have internal predecessors, (5276), 1177 states have call successors, (1177), 273 states have call predecessors, (1177), 791 states have return successors, (6567), 1592 states have call predecessors, (6567), 1050 states have call successors, (6567) [2021-12-19 14:59:09,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6715 states to 6715 states and 13020 transitions. [2021-12-19 14:59:09,396 INFO L78 Accepts]: Start accepts. Automaton has 6715 states and 13020 transitions. Word has length 58 [2021-12-19 14:59:09,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:09,396 INFO L470 AbstractCegarLoop]: Abstraction has 6715 states and 13020 transitions. [2021-12-19 14:59:09,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:09,397 INFO L276 IsEmpty]: Start isEmpty. Operand 6715 states and 13020 transitions. [2021-12-19 14:59:09,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-19 14:59:09,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:09,398 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:09,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:09,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-19 14:59:09,611 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:09,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:09,612 INFO L85 PathProgramCache]: Analyzing trace with hash 526800899, now seen corresponding path program 1 times [2021-12-19 14:59:09,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:09,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391838667] [2021-12-19 14:59:09,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:09,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:09,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 14:59:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:09,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 14:59:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:09,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:09,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 14:59:09,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-19 14:59:09,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:09,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391838667] [2021-12-19 14:59:09,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391838667] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:09,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936222225] [2021-12-19 14:59:09,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:09,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:09,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:09,749 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) [2021-12-19 14:59:09,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-19 14:59:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:09,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-19 14:59:09,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-19 14:59:09,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-19 14:59:10,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936222225] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:10,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:10,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2021-12-19 14:59:10,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870925782] [2021-12-19 14:59:10,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:10,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-19 14:59:10,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:10,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-19 14:59:10,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-12-19 14:59:10,294 INFO L87 Difference]: Start difference. First operand 6715 states and 13020 transitions. Second operand has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-19 14:59:12,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:12,555 INFO L93 Difference]: Finished difference Result 26411 states and 94719 transitions. [2021-12-19 14:59:12,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-19 14:59:12,564 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2021-12-19 14:59:12,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:12,772 INFO L225 Difference]: With dead ends: 26411 [2021-12-19 14:59:12,773 INFO L226 Difference]: Without dead ends: 20152 [2021-12-19 14:59:12,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1251, Invalid=4755, Unknown=0, NotChecked=0, Total=6006 [2021-12-19 14:59:12,950 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 159 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:12,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 296 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-19 14:59:12,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20152 states. [2021-12-19 14:59:14,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20152 to 14221. [2021-12-19 14:59:14,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14221 states, 9461 states have (on average 1.0752563154000634) internal successors, (10173), 9539 states have internal predecessors, (10173), 2706 states have call successors, (2706), 364 states have call predecessors, (2706), 2050 states have return successors, (36260), 4317 states have call predecessors, (36260), 2553 states have call successors, (36260) [2021-12-19 14:59:14,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14221 states to 14221 states and 49139 transitions. [2021-12-19 14:59:14,613 INFO L78 Accepts]: Start accepts. Automaton has 14221 states and 49139 transitions. Word has length 56 [2021-12-19 14:59:14,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:14,614 INFO L470 AbstractCegarLoop]: Abstraction has 14221 states and 49139 transitions. [2021-12-19 14:59:14,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-19 14:59:14,614 INFO L276 IsEmpty]: Start isEmpty. Operand 14221 states and 49139 transitions. [2021-12-19 14:59:14,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-19 14:59:14,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:14,616 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:14,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:14,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:14,824 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:14,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:14,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1996075823, now seen corresponding path program 2 times [2021-12-19 14:59:14,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:14,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940395389] [2021-12-19 14:59:14,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:14,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:14,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:14,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940395389] [2021-12-19 14:59:14,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940395389] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:14,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166547851] [2021-12-19 14:59:14,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 14:59:14,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:14,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:14,941 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) [2021-12-19 14:59:14,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-19 14:59:14,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 14:59:14,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 14:59:14,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-19 14:59:14,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:15,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:15,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166547851] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:15,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:15,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2021-12-19 14:59:15,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123027074] [2021-12-19 14:59:15,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:15,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-19 14:59:15,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:15,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-19 14:59:15,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2021-12-19 14:59:15,314 INFO L87 Difference]: Start difference. First operand 14221 states and 49139 transitions. Second operand has 32 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 18 states have internal predecessors, (103), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:16,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:16,983 INFO L93 Difference]: Finished difference Result 22021 states and 73282 transitions. [2021-12-19 14:59:16,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-19 14:59:16,983 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 18 states have internal predecessors, (103), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-19 14:59:16,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:17,134 INFO L225 Difference]: With dead ends: 22021 [2021-12-19 14:59:17,135 INFO L226 Difference]: Without dead ends: 22020 [2021-12-19 14:59:17,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1054, Invalid=2368, Unknown=0, NotChecked=0, Total=3422 [2021-12-19 14:59:17,149 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 772 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:17,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 626 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-19 14:59:17,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22020 states. [2021-12-19 14:59:18,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22020 to 20851. [2021-12-19 14:59:18,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20851 states, 13848 states have (on average 1.0675909878682843) internal successors, (14784), 14025 states have internal predecessors, (14784), 3890 states have call successors, (3890), 508 states have call predecessors, (3890), 3109 states have return successors, (51912), 6317 states have call predecessors, (51912), 3673 states have call successors, (51912) [2021-12-19 14:59:18,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20851 states to 20851 states and 70586 transitions. [2021-12-19 14:59:18,855 INFO L78 Accepts]: Start accepts. Automaton has 20851 states and 70586 transitions. Word has length 60 [2021-12-19 14:59:18,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:18,855 INFO L470 AbstractCegarLoop]: Abstraction has 20851 states and 70586 transitions. [2021-12-19 14:59:18,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 18 states have internal predecessors, (103), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:18,856 INFO L276 IsEmpty]: Start isEmpty. Operand 20851 states and 70586 transitions. [2021-12-19 14:59:18,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-19 14:59:18,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:18,859 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:18,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:19,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:19,075 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:19,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:19,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1312915314, now seen corresponding path program 3 times [2021-12-19 14:59:19,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:19,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932253561] [2021-12-19 14:59:19,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:19,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:19,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-19 14:59:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 3 proven. 116 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-19 14:59:19,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:19,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932253561] [2021-12-19 14:59:19,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932253561] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:19,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908481367] [2021-12-19 14:59:19,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-19 14:59:19,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:19,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:19,189 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) [2021-12-19 14:59:19,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-19 14:59:19,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-19 14:59:19,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 14:59:19,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-19 14:59:19,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-19 14:59:19,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-19 14:59:19,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908481367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 14:59:19,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-19 14:59:19,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 19 [2021-12-19 14:59:19,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546772506] [2021-12-19 14:59:19,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:59:19,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-19 14:59:19,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:19,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-19 14:59:19,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-12-19 14:59:19,339 INFO L87 Difference]: Start difference. First operand 20851 states and 70586 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 14:59:20,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:20,197 INFO L93 Difference]: Finished difference Result 20934 states and 72002 transitions. [2021-12-19 14:59:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-19 14:59:20,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-12-19 14:59:20,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:20,371 INFO L225 Difference]: With dead ends: 20934 [2021-12-19 14:59:20,372 INFO L226 Difference]: Without dead ends: 18654 [2021-12-19 14:59:20,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-12-19 14:59:20,398 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:20,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 50 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-19 14:59:20,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18654 states. [2021-12-19 14:59:21,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18654 to 18557. [2021-12-19 14:59:21,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18557 states, 11972 states have (on average 1.0447711326428333) internal successors, (12508), 11966 states have internal predecessors, (12508), 3684 states have call successors, (3684), 332 states have call predecessors, (3684), 2897 states have return successors, (51628), 6258 states have call predecessors, (51628), 3673 states have call successors, (51628) [2021-12-19 14:59:22,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18557 states to 18557 states and 67820 transitions. [2021-12-19 14:59:22,057 INFO L78 Accepts]: Start accepts. Automaton has 18557 states and 67820 transitions. Word has length 60 [2021-12-19 14:59:22,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:22,058 INFO L470 AbstractCegarLoop]: Abstraction has 18557 states and 67820 transitions. [2021-12-19 14:59:22,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 14:59:22,058 INFO L276 IsEmpty]: Start isEmpty. Operand 18557 states and 67820 transitions. [2021-12-19 14:59:22,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-19 14:59:22,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:22,062 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:22,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:22,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:22,275 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:22,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:22,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2027008992, now seen corresponding path program 2 times [2021-12-19 14:59:22,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:22,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420554834] [2021-12-19 14:59:22,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:22,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:22,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-19 14:59:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:22,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:22,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 14:59:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:22,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:22,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 14:59:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 89 proven. 17 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-19 14:59:22,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:22,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420554834] [2021-12-19 14:59:22,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420554834] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:22,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460526301] [2021-12-19 14:59:22,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 14:59:22,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:22,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:22,456 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) [2021-12-19 14:59:22,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-19 14:59:22,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 14:59:22,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 14:59:22,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-19 14:59:22,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:22,622 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 78 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-19 14:59:22,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 97 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-19 14:59:23,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460526301] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:23,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:23,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2021-12-19 14:59:23,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050186356] [2021-12-19 14:59:23,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:23,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-19 14:59:23,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:23,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-19 14:59:23,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-12-19 14:59:23,292 INFO L87 Difference]: Start difference. First operand 18557 states and 67820 transitions. Second operand has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-19 14:59:25,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:25,020 INFO L93 Difference]: Finished difference Result 29009 states and 107470 transitions. [2021-12-19 14:59:25,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-19 14:59:25,021 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 81 [2021-12-19 14:59:25,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:25,085 INFO L225 Difference]: With dead ends: 29009 [2021-12-19 14:59:25,085 INFO L226 Difference]: Without dead ends: 10982 [2021-12-19 14:59:25,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=673, Invalid=2633, Unknown=0, NotChecked=0, Total=3306 [2021-12-19 14:59:25,280 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 184 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:25,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 342 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-19 14:59:25,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10982 states. [2021-12-19 14:59:25,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10982 to 10399. [2021-12-19 14:59:25,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10399 states, 7045 states have (on average 1.0679914833215045) internal successors, (7524), 7211 states have internal predecessors, (7524), 2051 states have call successors, (2051), 356 states have call predecessors, (2051), 1299 states have return successors, (6727), 2831 states have call predecessors, (6727), 2043 states have call successors, (6727) [2021-12-19 14:59:25,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10399 states to 10399 states and 16302 transitions. [2021-12-19 14:59:25,797 INFO L78 Accepts]: Start accepts. Automaton has 10399 states and 16302 transitions. Word has length 81 [2021-12-19 14:59:25,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:25,797 INFO L470 AbstractCegarLoop]: Abstraction has 10399 states and 16302 transitions. [2021-12-19 14:59:25,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-19 14:59:25,798 INFO L276 IsEmpty]: Start isEmpty. Operand 10399 states and 16302 transitions. [2021-12-19 14:59:25,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-19 14:59:25,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:25,800 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:25,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:26,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:26,001 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:26,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:26,002 INFO L85 PathProgramCache]: Analyzing trace with hash -131434271, now seen corresponding path program 3 times [2021-12-19 14:59:26,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:26,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574452779] [2021-12-19 14:59:26,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:26,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:26,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 14:59:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:26,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:26,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:26,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574452779] [2021-12-19 14:59:26,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574452779] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:26,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807503122] [2021-12-19 14:59:26,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-19 14:59:26,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:26,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:26,129 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) [2021-12-19 14:59:26,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-19 14:59:26,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-19 14:59:26,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 14:59:26,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-19 14:59:26,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:26,312 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:26,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 65 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:26,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807503122] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:26,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:26,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2021-12-19 14:59:26,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982660462] [2021-12-19 14:59:26,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:26,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-19 14:59:26,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:26,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-19 14:59:26,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-12-19 14:59:26,659 INFO L87 Difference]: Start difference. First operand 10399 states and 16302 transitions. Second operand has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-19 14:59:27,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:27,487 INFO L93 Difference]: Finished difference Result 11154 states and 17444 transitions. [2021-12-19 14:59:27,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-19 14:59:27,487 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2021-12-19 14:59:27,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:27,517 INFO L225 Difference]: With dead ends: 11154 [2021-12-19 14:59:27,517 INFO L226 Difference]: Without dead ends: 11153 [2021-12-19 14:59:27,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=577, Invalid=1973, Unknown=0, NotChecked=0, Total=2550 [2021-12-19 14:59:27,523 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 177 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:27,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 242 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-19 14:59:27,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11153 states. [2021-12-19 14:59:27,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11153 to 10507. [2021-12-19 14:59:27,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10507 states, 7117 states have (on average 1.0647744836307433) internal successors, (7578), 7283 states have internal predecessors, (7578), 2051 states have call successors, (2051), 356 states have call predecessors, (2051), 1335 states have return successors, (6821), 2867 states have call predecessors, (6821), 2043 states have call successors, (6821) [2021-12-19 14:59:27,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10507 states to 10507 states and 16450 transitions. [2021-12-19 14:59:27,986 INFO L78 Accepts]: Start accepts. Automaton has 10507 states and 16450 transitions. Word has length 69 [2021-12-19 14:59:27,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:27,986 INFO L470 AbstractCegarLoop]: Abstraction has 10507 states and 16450 transitions. [2021-12-19 14:59:27,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-19 14:59:27,986 INFO L276 IsEmpty]: Start isEmpty. Operand 10507 states and 16450 transitions. [2021-12-19 14:59:27,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-19 14:59:27,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:27,989 INFO L514 BasicCegarLoop]: trace histogram [10, 7, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:28,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:28,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:28,201 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:28,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:28,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1597804450, now seen corresponding path program 2 times [2021-12-19 14:59:28,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:28,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351068070] [2021-12-19 14:59:28,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:28,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:28,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-19 14:59:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:28,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:28,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 14:59:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:28,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 14:59:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:28,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:28,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 14:59:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:28,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-19 14:59:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-19 14:59:28,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:28,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351068070] [2021-12-19 14:59:28,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351068070] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:28,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242272632] [2021-12-19 14:59:28,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 14:59:28,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:28,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:28,272 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) [2021-12-19 14:59:28,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-19 14:59:28,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 14:59:28,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 14:59:28,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-19 14:59:28,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 100 proven. 15 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-19 14:59:28,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 100 proven. 26 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-19 14:59:28,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242272632] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:28,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:28,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2021-12-19 14:59:28,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724713650] [2021-12-19 14:59:28,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:28,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-19 14:59:28,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:28,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-19 14:59:28,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-19 14:59:28,783 INFO L87 Difference]: Start difference. First operand 10507 states and 16450 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-19 14:59:29,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:29,282 INFO L93 Difference]: Finished difference Result 21303 states and 37540 transitions. [2021-12-19 14:59:29,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-19 14:59:29,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) Word has length 88 [2021-12-19 14:59:29,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:29,317 INFO L225 Difference]: With dead ends: 21303 [2021-12-19 14:59:29,317 INFO L226 Difference]: Without dead ends: 11691 [2021-12-19 14:59:29,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-12-19 14:59:29,354 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 61 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:29,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 77 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:59:29,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11691 states. [2021-12-19 14:59:29,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11691 to 10501. [2021-12-19 14:59:29,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10501 states, 7114 states have (on average 1.064801799269047) internal successors, (7575), 7280 states have internal predecessors, (7575), 2048 states have call successors, (2048), 356 states have call predecessors, (2048), 1335 states have return successors, (6741), 2864 states have call predecessors, (6741), 2013 states have call successors, (6741) [2021-12-19 14:59:29,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10501 states to 10501 states and 16364 transitions. [2021-12-19 14:59:29,882 INFO L78 Accepts]: Start accepts. Automaton has 10501 states and 16364 transitions. Word has length 88 [2021-12-19 14:59:29,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:29,882 INFO L470 AbstractCegarLoop]: Abstraction has 10501 states and 16364 transitions. [2021-12-19 14:59:29,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-19 14:59:29,883 INFO L276 IsEmpty]: Start isEmpty. Operand 10501 states and 16364 transitions. [2021-12-19 14:59:29,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-19 14:59:29,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:29,886 INFO L514 BasicCegarLoop]: trace histogram [11, 9, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:29,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:30,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:30,099 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:30,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:30,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1897499616, now seen corresponding path program 3 times [2021-12-19 14:59:30,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:30,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815903984] [2021-12-19 14:59:30,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:30,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:30,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 14:59:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:30,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 14:59:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:30,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 14:59:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:30,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:30,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 14:59:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:30,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:30,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 14:59:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:30,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-19 14:59:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:30,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-19 14:59:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 113 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-19 14:59:30,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:30,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815903984] [2021-12-19 14:59:30,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815903984] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:30,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224493869] [2021-12-19 14:59:30,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-19 14:59:30,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:30,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:30,234 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) [2021-12-19 14:59:30,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-19 14:59:30,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-19 14:59:30,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 14:59:30,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-19 14:59:30,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 150 proven. 26 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-19 14:59:30,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:31,211 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 119 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-19 14:59:31,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224493869] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:31,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:31,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2021-12-19 14:59:31,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930973633] [2021-12-19 14:59:31,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:31,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-19 14:59:31,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:31,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-19 14:59:31,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-12-19 14:59:31,213 INFO L87 Difference]: Start difference. First operand 10501 states and 16364 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) [2021-12-19 14:59:31,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:31,779 INFO L93 Difference]: Finished difference Result 24332 states and 49250 transitions. [2021-12-19 14:59:31,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-19 14:59:31,780 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) Word has length 99 [2021-12-19 14:59:31,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:31,901 INFO L225 Difference]: With dead ends: 24332 [2021-12-19 14:59:31,901 INFO L226 Difference]: Without dead ends: 14755 [2021-12-19 14:59:31,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-12-19 14:59:31,935 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 98 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:31,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 121 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:59:31,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14755 states. [2021-12-19 14:59:32,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14755 to 14389. [2021-12-19 14:59:32,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14389 states, 9709 states have (on average 1.0530435678236687) internal successors, (10224), 9968 states have internal predecessors, (10224), 2881 states have call successors, (2881), 496 states have call predecessors, (2881), 1795 states have return successors, (9707), 3924 states have call predecessors, (9707), 2826 states have call successors, (9707) [2021-12-19 14:59:32,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14389 states to 14389 states and 22812 transitions. [2021-12-19 14:59:32,651 INFO L78 Accepts]: Start accepts. Automaton has 14389 states and 22812 transitions. Word has length 99 [2021-12-19 14:59:32,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:32,652 INFO L470 AbstractCegarLoop]: Abstraction has 14389 states and 22812 transitions. [2021-12-19 14:59:32,652 INFO L471 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) [2021-12-19 14:59:32,652 INFO L276 IsEmpty]: Start isEmpty. Operand 14389 states and 22812 transitions. [2021-12-19 14:59:32,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-19 14:59:32,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:32,656 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 7, 7, 7, 7, 6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:32,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-19 14:59:32,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-19 14:59:32,871 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:32,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:32,872 INFO L85 PathProgramCache]: Analyzing trace with hash -127918165, now seen corresponding path program 3 times [2021-12-19 14:59:32,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:32,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505405459] [2021-12-19 14:59:32,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:32,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:32,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 14:59:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:32,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 14:59:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:32,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:33,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 14:59:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 122 proven. 90 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-19 14:59:33,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:33,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505405459] [2021-12-19 14:59:33,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505405459] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:33,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369940710] [2021-12-19 14:59:33,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-19 14:59:33,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:33,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:33,058 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) [2021-12-19 14:59:33,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-19 14:59:33,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-19 14:59:33,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 14:59:33,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-19 14:59:33,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:33,324 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 119 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-19 14:59:33,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-19 14:59:33,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369940710] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:33,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:33,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2021-12-19 14:59:33,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043830101] [2021-12-19 14:59:33,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:33,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-19 14:59:33,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:33,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-19 14:59:33,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-12-19 14:59:33,529 INFO L87 Difference]: Start difference. First operand 14389 states and 22812 transitions. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-19 14:59:34,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:34,959 INFO L93 Difference]: Finished difference Result 25356 states and 43274 transitions. [2021-12-19 14:59:34,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-19 14:59:34,959 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 88 [2021-12-19 14:59:34,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:35,120 INFO L225 Difference]: With dead ends: 25356 [2021-12-19 14:59:35,121 INFO L226 Difference]: Without dead ends: 13111 [2021-12-19 14:59:35,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=989, Invalid=3433, Unknown=0, NotChecked=0, Total=4422 [2021-12-19 14:59:35,171 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 223 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:35,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 161 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-19 14:59:35,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13111 states. [2021-12-19 14:59:35,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13111 to 11133. [2021-12-19 14:59:35,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11133 states, 7576 states have (on average 1.046066525871172) internal successors, (7925), 7824 states have internal predecessors, (7925), 2175 states have call successors, (2175), 424 states have call predecessors, (2175), 1378 states have return successors, (5289), 2884 states have call predecessors, (5289), 2141 states have call successors, (5289) [2021-12-19 14:59:35,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11133 states to 11133 states and 15389 transitions. [2021-12-19 14:59:35,623 INFO L78 Accepts]: Start accepts. Automaton has 11133 states and 15389 transitions. Word has length 88 [2021-12-19 14:59:35,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:35,623 INFO L470 AbstractCegarLoop]: Abstraction has 11133 states and 15389 transitions. [2021-12-19 14:59:35,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-19 14:59:35,623 INFO L276 IsEmpty]: Start isEmpty. Operand 11133 states and 15389 transitions. [2021-12-19 14:59:35,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-19 14:59:35,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:35,626 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:35,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:35,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-19 14:59:35,839 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:35,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:35,840 INFO L85 PathProgramCache]: Analyzing trace with hash -635779733, now seen corresponding path program 4 times [2021-12-19 14:59:35,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:35,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091250155] [2021-12-19 14:59:35,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:35,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:35,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 14:59:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:35,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 14:59:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:35,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 14:59:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:35,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 14:59:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:35,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:35,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 14:59:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:35,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-19 14:59:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:36,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-19 14:59:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 51 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-19 14:59:36,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:36,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091250155] [2021-12-19 14:59:36,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091250155] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:36,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369919977] [2021-12-19 14:59:36,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-19 14:59:36,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:36,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:36,017 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) [2021-12-19 14:59:36,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-19 14:59:36,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-19 14:59:36,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 14:59:36,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-19 14:59:36,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 67 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-19 14:59:36,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 42 proven. 89 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-19 14:59:37,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369919977] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:37,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:37,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2021-12-19 14:59:37,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635144500] [2021-12-19 14:59:37,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:37,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-19 14:59:37,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:37,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-19 14:59:37,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-12-19 14:59:37,408 INFO L87 Difference]: Start difference. First operand 11133 states and 15389 transitions. Second operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2021-12-19 14:59:41,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:41,162 INFO L93 Difference]: Finished difference Result 34661 states and 55072 transitions. [2021-12-19 14:59:41,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-12-19 14:59:41,163 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) Word has length 90 [2021-12-19 14:59:41,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:41,293 INFO L225 Difference]: With dead ends: 34661 [2021-12-19 14:59:41,293 INFO L226 Difference]: Without dead ends: 33559 [2021-12-19 14:59:41,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12151 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5458, Invalid=27122, Unknown=0, NotChecked=0, Total=32580 [2021-12-19 14:59:41,319 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 299 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 1204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 2764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1204 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:41,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 345 Invalid, 2764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1204 Valid, 1560 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-19 14:59:41,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33559 states. [2021-12-19 14:59:42,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33559 to 21083. [2021-12-19 14:59:42,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21083 states, 13668 states have (on average 1.0274363476733976) internal successors, (14043), 13899 states have internal predecessors, (14043), 4366 states have call successors, (4366), 532 states have call predecessors, (4366), 3045 states have return successors, (14390), 6651 states have call predecessors, (14390), 4312 states have call successors, (14390) [2021-12-19 14:59:42,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21083 states to 21083 states and 32799 transitions. [2021-12-19 14:59:42,473 INFO L78 Accepts]: Start accepts. Automaton has 21083 states and 32799 transitions. Word has length 90 [2021-12-19 14:59:42,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:42,473 INFO L470 AbstractCegarLoop]: Abstraction has 21083 states and 32799 transitions. [2021-12-19 14:59:42,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2021-12-19 14:59:42,473 INFO L276 IsEmpty]: Start isEmpty. Operand 21083 states and 32799 transitions. [2021-12-19 14:59:42,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-19 14:59:42,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:42,479 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:42,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:42,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-19 14:59:42,680 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:42,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:42,680 INFO L85 PathProgramCache]: Analyzing trace with hash -165426143, now seen corresponding path program 3 times [2021-12-19 14:59:42,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:42,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445140559] [2021-12-19 14:59:42,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:42,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:42,998 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:42,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:42,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445140559] [2021-12-19 14:59:42,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445140559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:42,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616731649] [2021-12-19 14:59:42,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-19 14:59:42,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:42,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:43,003 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) [2021-12-19 14:59:43,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-19 14:59:43,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-19 14:59:43,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 14:59:43,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-19 14:59:43,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:43,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:44,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616731649] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:44,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:44,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2021-12-19 14:59:44,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194931229] [2021-12-19 14:59:44,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:44,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-19 14:59:44,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:44,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-19 14:59:44,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=3036, Unknown=0, NotChecked=0, Total=4032 [2021-12-19 14:59:44,093 INFO L87 Difference]: Start difference. First operand 21083 states and 32799 transitions. Second operand has 64 states, 61 states have (on average 3.5245901639344264) internal successors, (215), 34 states have internal predecessors, (215), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:46,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:46,807 INFO L93 Difference]: Finished difference Result 36172 states and 56287 transitions. [2021-12-19 14:59:46,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-19 14:59:46,807 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 61 states have (on average 3.5245901639344264) internal successors, (215), 34 states have internal predecessors, (215), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-12-19 14:59:46,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:46,962 INFO L225 Difference]: With dead ends: 36172 [2021-12-19 14:59:46,962 INFO L226 Difference]: Without dead ends: 36171 [2021-12-19 14:59:46,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3484 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4654, Invalid=10352, Unknown=0, NotChecked=0, Total=15006 [2021-12-19 14:59:46,988 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1302 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 799 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1306 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 799 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:46,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1306 Valid, 881 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [799 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-19 14:59:47,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36171 states. [2021-12-19 14:59:48,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36171 to 36171. [2021-12-19 14:59:48,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36171 states, 23412 states have (on average 1.0283188108662225) internal successors, (24075), 23931 states have internal predecessors, (24075), 7326 states have call successors, (7326), 820 states have call predecessors, (7326), 5429 states have return successors, (24870), 11419 states have call predecessors, (24870), 7272 states have call successors, (24870) [2021-12-19 14:59:49,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36171 states to 36171 states and 56271 transitions. [2021-12-19 14:59:49,011 INFO L78 Accepts]: Start accepts. Automaton has 36171 states and 56271 transitions. Word has length 124 [2021-12-19 14:59:49,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:49,011 INFO L470 AbstractCegarLoop]: Abstraction has 36171 states and 56271 transitions. [2021-12-19 14:59:49,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 61 states have (on average 3.5245901639344264) internal successors, (215), 34 states have internal predecessors, (215), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:49,012 INFO L276 IsEmpty]: Start isEmpty. Operand 36171 states and 56271 transitions. [2021-12-19 14:59:49,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-19 14:59:49,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:49,019 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:49,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:49,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:49,235 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:49,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:49,235 INFO L85 PathProgramCache]: Analyzing trace with hash -570444405, now seen corresponding path program 2 times [2021-12-19 14:59:49,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:49,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701231744] [2021-12-19 14:59:49,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:49,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-19 14:59:49,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:49,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701231744] [2021-12-19 14:59:49,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701231744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:49,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528743872] [2021-12-19 14:59:49,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 14:59:49,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:49,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:49,449 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) [2021-12-19 14:59:49,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-19 14:59:49,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 14:59:49,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 14:59:49,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-19 14:59:49,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-19 14:59:49,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-19 14:59:50,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528743872] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:50,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:50,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-12-19 14:59:50,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840762416] [2021-12-19 14:59:50,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:50,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-19 14:59:50,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:50,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-19 14:59:50,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2021-12-19 14:59:50,279 INFO L87 Difference]: Start difference. First operand 36171 states and 56271 transitions. Second operand has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:54,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:54,127 INFO L93 Difference]: Finished difference Result 81584 states and 127861 transitions. [2021-12-19 14:59:54,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-19 14:59:54,127 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-12-19 14:59:54,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:54,438 INFO L225 Difference]: With dead ends: 81584 [2021-12-19 14:59:54,439 INFO L226 Difference]: Without dead ends: 81583 [2021-12-19 14:59:54,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2021-12-19 14:59:54,473 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1475 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 638 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1478 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 638 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:54,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1478 Valid, 568 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [638 Valid, 954 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-19 14:59:54,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81583 states. [2021-12-19 14:59:58,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81583 to 81531. [2021-12-19 14:59:58,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81531 states, 52896 states have (on average 1.0290948275862069) internal successors, (54435), 54099 states have internal predecessors, (54435), 16494 states have call successors, (16494), 1900 states have call predecessors, (16494), 12137 states have return successors, (56910), 25531 states have call predecessors, (56910), 16380 states have call successors, (56910) [2021-12-19 14:59:58,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81531 states to 81531 states and 127839 transitions. [2021-12-19 14:59:58,794 INFO L78 Accepts]: Start accepts. Automaton has 81531 states and 127839 transitions. Word has length 142 [2021-12-19 14:59:58,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:58,794 INFO L470 AbstractCegarLoop]: Abstraction has 81531 states and 127839 transitions. [2021-12-19 14:59:58,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:58,794 INFO L276 IsEmpty]: Start isEmpty. Operand 81531 states and 127839 transitions. [2021-12-19 14:59:58,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-12-19 14:59:58,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:58,810 INFO L514 BasicCegarLoop]: trace histogram [32, 25, 21, 21, 21, 20, 20, 20, 17, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:58,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-19 14:59:59,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-19 14:59:59,011 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:59,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:59,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1541003223, now seen corresponding path program 1 times [2021-12-19 14:59:59,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:59,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174479117] [2021-12-19 14:59:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:59,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:59,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-19 14:59:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 14:59:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 14:59:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 14:59:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-19 14:59:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 14:59:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 14:59:59,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 14:59:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 14:59:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 14:59:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-19 14:59:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-19 14:59:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-19 14:59:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2697 backedges. 863 proven. 214 refuted. 0 times theorem prover too weak. 1620 trivial. 0 not checked. [2021-12-19 14:59:59,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:59,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174479117] [2021-12-19 14:59:59,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174479117] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:59,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544902343] [2021-12-19 14:59:59,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:59,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:59,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:59,356 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) [2021-12-19 14:59:59,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-19 14:59:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-19 14:59:59,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:59,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2697 backedges. 851 proven. 216 refuted. 0 times theorem prover too weak. 1630 trivial. 0 not checked. [2021-12-19 14:59:59,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2697 backedges. 867 proven. 263 refuted. 0 times theorem prover too weak. 1567 trivial. 0 not checked. [2021-12-19 15:00:01,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544902343] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:01,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:01,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 21] total 27 [2021-12-19 15:00:01,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377962825] [2021-12-19 15:00:01,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:01,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-19 15:00:01,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:01,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-19 15:00:01,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-12-19 15:00:01,765 INFO L87 Difference]: Start difference. First operand 81531 states and 127839 transitions. Second operand has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 24 states have internal predecessors, (122), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) [2021-12-19 15:00:07,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:07,089 INFO L93 Difference]: Finished difference Result 191463 states and 387224 transitions. [2021-12-19 15:00:07,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-19 15:00:07,089 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 24 states have internal predecessors, (122), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) Word has length 281 [2021-12-19 15:00:07,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:08,032 INFO L225 Difference]: With dead ends: 191463 [2021-12-19 15:00:08,032 INFO L226 Difference]: Without dead ends: 119291 [2021-12-19 15:00:08,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 592 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1557, Unknown=0, NotChecked=0, Total=1980 [2021-12-19 15:00:08,692 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 216 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:08,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 299 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-19 15:00:08,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119291 states.