./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Ackermann01-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 839c364b 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/Ackermann01-2.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 93bcf8b6df587e0bc8cb137c6415932ffc9083999b1b09826c5b148989ca1a7b --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 22:40:42,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 22:40:42,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 22:40:42,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 22:40:42,834 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 22:40:42,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 22:40:42,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 22:40:42,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 22:40:42,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 22:40:42,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 22:40:42,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 22:40:42,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 22:40:42,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 22:40:42,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 22:40:42,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 22:40:42,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 22:40:42,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 22:40:42,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 22:40:42,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 22:40:42,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 22:40:42,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 22:40:42,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 22:40:42,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 22:40:42,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 22:40:42,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 22:40:42,868 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 22:40:42,868 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 22:40:42,869 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 22:40:42,869 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 22:40:42,870 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 22:40:42,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 22:40:42,871 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 22:40:42,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 22:40:42,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 22:40:42,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 22:40:42,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 22:40:42,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 22:40:42,874 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 22:40:42,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 22:40:42,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 22:40:42,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 22:40:42,876 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-12-14 22:40:42,902 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 22:40:42,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 22:40:42,903 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 22:40:42,903 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 22:40:42,904 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 22:40:42,904 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 22:40:42,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 22:40:42,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 22:40:42,905 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 22:40:42,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 22:40:42,906 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 22:40:42,906 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 22:40:42,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 22:40:42,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 22:40:42,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 22:40:42,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 22:40:42,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 22:40:42,907 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 22:40:42,907 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-14 22:40:42,907 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 22:40:42,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 22:40:42,907 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 22:40:42,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 22:40:42,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 22:40:42,908 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 22:40:42,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 22:40:42,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 22:40:42,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 22:40:42,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 22:40:42,909 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 22:40:42,909 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 22:40:42,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 22:40:42,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 22:40:42,910 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 22:40:42,910 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93bcf8b6df587e0bc8cb137c6415932ffc9083999b1b09826c5b148989ca1a7b [2021-12-14 22:40:43,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 22:40:43,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 22:40:43,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 22:40:43,112 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 22:40:43,113 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 22:40:43,114 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann01-2.c [2021-12-14 22:40:43,163 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39242fc4c/0c622394008d4bea95becf3090678f0c/FLAG4cab6403c [2021-12-14 22:40:43,454 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 22:40:43,455 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann01-2.c [2021-12-14 22:40:43,459 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39242fc4c/0c622394008d4bea95becf3090678f0c/FLAG4cab6403c [2021-12-14 22:40:43,890 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39242fc4c/0c622394008d4bea95becf3090678f0c [2021-12-14 22:40:43,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 22:40:43,896 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 22:40:43,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 22:40:43,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 22:40:43,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 22:40:43,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:40:43" (1/1) ... [2021-12-14 22:40:43,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49402895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:43, skipping insertion in model container [2021-12-14 22:40:43,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:40:43" (1/1) ... [2021-12-14 22:40:43,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 22:40:43,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 22:40:44,008 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/Ackermann01-2.c[1234,1247] [2021-12-14 22:40:44,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 22:40:44,013 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 22:40:44,044 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/Ackermann01-2.c[1234,1247] [2021-12-14 22:40:44,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 22:40:44,055 INFO L208 MainTranslator]: Completed translation [2021-12-14 22:40:44,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:44 WrapperNode [2021-12-14 22:40:44,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 22:40:44,057 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 22:40:44,057 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 22:40:44,057 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 22:40:44,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:44" (1/1) ... [2021-12-14 22:40:44,067 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:44" (1/1) ... [2021-12-14 22:40:44,078 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2021-12-14 22:40:44,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 22:40:44,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 22:40:44,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 22:40:44,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 22:40:44,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:44" (1/1) ... [2021-12-14 22:40:44,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:44" (1/1) ... [2021-12-14 22:40:44,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:44" (1/1) ... [2021-12-14 22:40:44,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:44" (1/1) ... [2021-12-14 22:40:44,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:44" (1/1) ... [2021-12-14 22:40:44,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:44" (1/1) ... [2021-12-14 22:40:44,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:44" (1/1) ... [2021-12-14 22:40:44,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 22:40:44,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 22:40:44,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 22:40:44,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 22:40:44,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:44" (1/1) ... [2021-12-14 22:40:44,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 22:40:44,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:44,137 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) [2021-12-14 22:40:44,138 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 [2021-12-14 22:40:44,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 22:40:44,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 22:40:44,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 22:40:44,169 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2021-12-14 22:40:44,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2021-12-14 22:40:44,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 22:40:44,215 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 22:40:44,216 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 22:40:44,292 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 22:40:44,297 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 22:40:44,297 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 22:40:44,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:40:44 BoogieIcfgContainer [2021-12-14 22:40:44,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 22:40:44,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 22:40:44,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 22:40:44,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 22:40:44,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:40:43" (1/3) ... [2021-12-14 22:40:44,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7787b717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:40:44, skipping insertion in model container [2021-12-14 22:40:44,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:44" (2/3) ... [2021-12-14 22:40:44,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7787b717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:40:44, skipping insertion in model container [2021-12-14 22:40:44,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:40:44" (3/3) ... [2021-12-14 22:40:44,304 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2021-12-14 22:40:44,307 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 22:40:44,307 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-12-14 22:40:44,337 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 22:40:44,349 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 [2021-12-14 22:40:44,355 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-12-14 22:40:44,380 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) [2021-12-14 22:40:44,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 22:40:44,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:44,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:44,383 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:40:44,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:44,386 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2021-12-14 22:40:44,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:44,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127502677] [2021-12-14 22:40:44,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:44,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:40:44,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:44,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127502677] [2021-12-14 22:40:44,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127502677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:40:44,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:40:44,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 22:40:44,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875030983] [2021-12-14 22:40:44,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:40:44,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 22:40:44,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:44,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 22:40:44,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 22:40:44,632 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) [2021-12-14 22:40:44,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:44,743 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-12-14 22:40:44,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 22:40:44,746 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 [2021-12-14 22:40:44,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:44,752 INFO L225 Difference]: With dead ends: 73 [2021-12-14 22:40:44,752 INFO L226 Difference]: Without dead ends: 59 [2021-12-14 22:40:44,754 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 [2021-12-14 22:40:44,756 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:44,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 125 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 22:40:44,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-14 22:40:44,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2021-12-14 22:40:44,783 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) [2021-12-14 22:40:44,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2021-12-14 22:40:44,785 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2021-12-14 22:40:44,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:44,785 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2021-12-14 22:40:44,785 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) [2021-12-14 22:40:44,786 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2021-12-14 22:40:44,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-14 22:40:44,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:44,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:44,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 22:40:44,786 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:40:44,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:44,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2021-12-14 22:40:44,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:44,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578490728] [2021-12-14 22:40:44,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:44,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:44,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:40:44,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:44,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578490728] [2021-12-14 22:40:44,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578490728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:40:44,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:40:44,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 22:40:44,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616892035] [2021-12-14 22:40:44,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:40:44,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 22:40:44,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:44,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 22:40:44,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 22:40:44,840 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) [2021-12-14 22:40:44,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:44,878 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-12-14 22:40:44,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 22:40:44,879 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 [2021-12-14 22:40:44,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:44,879 INFO L225 Difference]: With dead ends: 51 [2021-12-14 22:40:44,880 INFO L226 Difference]: Without dead ends: 49 [2021-12-14 22:40:44,880 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 [2021-12-14 22:40:44,881 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 [2021-12-14 22:40:44,881 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] [2021-12-14 22:40:44,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-14 22:40:44,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-14 22:40:44,887 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) [2021-12-14 22:40:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2021-12-14 22:40:44,889 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 9 [2021-12-14 22:40:44,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:44,889 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2021-12-14 22:40:44,889 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) [2021-12-14 22:40:44,889 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2021-12-14 22:40:44,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-14 22:40:44,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:44,890 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:44,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 22:40:44,890 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:40:44,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:44,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2021-12-14 22:40:44,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:44,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16834484] [2021-12-14 22:40:44,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:44,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:40:44,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:44,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16834484] [2021-12-14 22:40:44,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16834484] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:40:44,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:40:44,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 22:40:44,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866818125] [2021-12-14 22:40:44,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:40:44,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 22:40:44,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:44,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 22:40:44,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 22:40:44,935 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) [2021-12-14 22:40:45,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:45,005 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-12-14 22:40:45,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 22:40:45,006 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 [2021-12-14 22:40:45,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:45,007 INFO L225 Difference]: With dead ends: 76 [2021-12-14 22:40:45,009 INFO L226 Difference]: Without dead ends: 74 [2021-12-14 22:40:45,010 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 [2021-12-14 22:40:45,011 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 [2021-12-14 22:40:45,011 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] [2021-12-14 22:40:45,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-14 22:40:45,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-12-14 22:40:45,020 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) [2021-12-14 22:40:45,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2021-12-14 22:40:45,022 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 9 [2021-12-14 22:40:45,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:45,022 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2021-12-14 22:40:45,022 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) [2021-12-14 22:40:45,022 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2021-12-14 22:40:45,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 22:40:45,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:45,023 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:45,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 22:40:45,023 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:40:45,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:45,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2021-12-14 22:40:45,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:45,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423344648] [2021-12-14 22:40:45,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:45,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:40:45,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:45,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423344648] [2021-12-14 22:40:45,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423344648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:40:45,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:40:45,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 22:40:45,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177840851] [2021-12-14 22:40:45,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:40:45,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 22:40:45,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:45,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 22:40:45,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 22:40:45,075 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) [2021-12-14 22:40:45,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:45,132 INFO L93 Difference]: Finished difference Result 116 states and 154 transitions. [2021-12-14 22:40:45,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 22:40:45,135 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 [2021-12-14 22:40:45,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:45,136 INFO L225 Difference]: With dead ends: 116 [2021-12-14 22:40:45,136 INFO L226 Difference]: Without dead ends: 108 [2021-12-14 22:40:45,137 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 [2021-12-14 22:40:45,138 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 [2021-12-14 22:40:45,138 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] [2021-12-14 22:40:45,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-14 22:40:45,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2021-12-14 22:40:45,149 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) [2021-12-14 22:40:45,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2021-12-14 22:40:45,150 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 10 [2021-12-14 22:40:45,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:45,151 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2021-12-14 22:40:45,151 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) [2021-12-14 22:40:45,151 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2021-12-14 22:40:45,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 22:40:45,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:45,151 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:45,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 22:40:45,152 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:40:45,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:45,152 INFO L85 PathProgramCache]: Analyzing trace with hash 219392943, now seen corresponding path program 1 times [2021-12-14 22:40:45,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:45,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175560345] [2021-12-14 22:40:45,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:45,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:40:45,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:45,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175560345] [2021-12-14 22:40:45,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175560345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:40:45,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:40:45,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 22:40:45,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112657781] [2021-12-14 22:40:45,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:40:45,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 22:40:45,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:45,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 22:40:45,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 22:40:45,216 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) [2021-12-14 22:40:45,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:45,249 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2021-12-14 22:40:45,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 22:40:45,250 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 [2021-12-14 22:40:45,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:45,251 INFO L225 Difference]: With dead ends: 168 [2021-12-14 22:40:45,251 INFO L226 Difference]: Without dead ends: 97 [2021-12-14 22:40:45,252 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 [2021-12-14 22:40:45,253 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 [2021-12-14 22:40:45,253 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] [2021-12-14 22:40:45,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-14 22:40:45,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-12-14 22:40:45,269 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) [2021-12-14 22:40:45,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2021-12-14 22:40:45,272 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 16 [2021-12-14 22:40:45,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:45,275 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2021-12-14 22:40:45,275 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) [2021-12-14 22:40:45,275 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2021-12-14 22:40:45,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 22:40:45,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:45,276 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:45,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 22:40:45,276 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:40:45,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:45,280 INFO L85 PathProgramCache]: Analyzing trace with hash 219399894, now seen corresponding path program 1 times [2021-12-14 22:40:45,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:45,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340517384] [2021-12-14 22:40:45,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:45,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:40:45,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:45,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340517384] [2021-12-14 22:40:45,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340517384] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:45,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849141584] [2021-12-14 22:40:45,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:45,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:45,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:45,334 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) [2021-12-14 22:40:45,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 22:40:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:45,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 22:40:45,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:40:45,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:40:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:40:45,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849141584] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:40:45,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:40:45,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-14 22:40:45,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042329125] [2021-12-14 22:40:45,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:40:45,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 22:40:45,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:45,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 22:40:45,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-14 22:40:45,516 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) [2021-12-14 22:40:45,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:45,691 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2021-12-14 22:40:45,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 22:40:45,692 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 [2021-12-14 22:40:45,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:45,693 INFO L225 Difference]: With dead ends: 274 [2021-12-14 22:40:45,693 INFO L226 Difference]: Without dead ends: 272 [2021-12-14 22:40:45,694 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 [2021-12-14 22:40:45,695 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:45,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 180 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 22:40:45,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-14 22:40:45,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2021-12-14 22:40:45,711 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) [2021-12-14 22:40:45,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2021-12-14 22:40:45,713 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 16 [2021-12-14 22:40:45,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:45,713 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2021-12-14 22:40:45,713 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) [2021-12-14 22:40:45,713 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2021-12-14 22:40:45,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 22:40:45,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:45,714 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:45,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 22:40:45,927 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 [2021-12-14 22:40:45,928 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:40:45,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:45,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1162887243, now seen corresponding path program 1 times [2021-12-14 22:40:45,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:45,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428835971] [2021-12-14 22:40:45,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:45,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:40:45,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:45,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428835971] [2021-12-14 22:40:45,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428835971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:45,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748482429] [2021-12-14 22:40:45,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:45,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:45,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:45,973 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) [2021-12-14 22:40:45,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 22:40:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:45,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 22:40:46,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:46,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:40:46,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 22:40:46,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748482429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:40:46,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 22:40:46,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-12-14 22:40:46,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447227062] [2021-12-14 22:40:46,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:40:46,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 22:40:46,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:46,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 22:40:46,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-14 22:40:46,063 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:40:46,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:46,128 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2021-12-14 22:40:46,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 22:40:46,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-14 22:40:46,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:46,134 INFO L225 Difference]: With dead ends: 328 [2021-12-14 22:40:46,135 INFO L226 Difference]: Without dead ends: 327 [2021-12-14 22:40:46,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-14 22:40:46,137 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 49 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:46,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 91 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 22:40:46,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-14 22:40:46,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2021-12-14 22:40:46,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 227 states have (on average 1.2599118942731278) internal successors, (286), 234 states have internal predecessors, (286), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-14 22:40:46,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2021-12-14 22:40:46,171 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 17 [2021-12-14 22:40:46,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:46,171 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2021-12-14 22:40:46,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:40:46,171 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2021-12-14 22:40:46,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 22:40:46,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:46,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:46,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 22:40:46,383 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 [2021-12-14 22:40:46,387 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:40:46,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:46,387 INFO L85 PathProgramCache]: Analyzing trace with hash 523262015, now seen corresponding path program 1 times [2021-12-14 22:40:46,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:46,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044612295] [2021-12-14 22:40:46,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:46,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:40:46,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:46,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044612295] [2021-12-14 22:40:46,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044612295] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:46,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970458703] [2021-12-14 22:40:46,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:46,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:46,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:46,431 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) [2021-12-14 22:40:46,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 22:40:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:46,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 22:40:46,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:40:46,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:40:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:40:46,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970458703] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:40:46,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:40:46,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-14 22:40:46,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091798121] [2021-12-14 22:40:46,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:40:46,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 22:40:46,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:46,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 22:40:46,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-14 22:40:46,578 INFO L87 Difference]: Start difference. First operand 293 states and 373 transitions. Second operand has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:40:46,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:46,757 INFO L93 Difference]: Finished difference Result 591 states and 792 transitions. [2021-12-14 22:40:46,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 22:40:46,758 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-14 22:40:46,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:46,760 INFO L225 Difference]: With dead ends: 591 [2021-12-14 22:40:46,761 INFO L226 Difference]: Without dead ends: 590 [2021-12-14 22:40:46,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-12-14 22:40:46,762 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 167 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:46,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 237 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 22:40:46,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-12-14 22:40:46,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 521. [2021-12-14 22:40:46,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 407 states have (on average 1.203931203931204) internal successors, (490), 414 states have internal predecessors, (490), 81 states have call successors, (81), 28 states have call predecessors, (81), 27 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2021-12-14 22:40:46,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2021-12-14 22:40:46,784 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 20 [2021-12-14 22:40:46,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:46,784 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2021-12-14 22:40:46,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:40:46,784 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2021-12-14 22:40:46,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-14 22:40:46,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:46,785 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] [2021-12-14 22:40:46,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 22:40:46,999 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 [2021-12-14 22:40:47,000 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:40:47,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:47,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2021-12-14 22:40:47,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:47,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543511873] [2021-12-14 22:40:47,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:47,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:47,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 22:40:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 22:40:47,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:47,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543511873] [2021-12-14 22:40:47,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543511873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:47,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708311105] [2021-12-14 22:40:47,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:47,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:47,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:47,069 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) [2021-12-14 22:40:47,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 22:40:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:47,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 22:40:47,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 22:40:47,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:40:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 22:40:47,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708311105] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:40:47,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:40:47,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-12-14 22:40:47,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11720964] [2021-12-14 22:40:47,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:40:47,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 22:40:47,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:47,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 22:40:47,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-12-14 22:40:47,283 INFO L87 Difference]: Start difference. First operand 521 states and 649 transitions. Second operand has 15 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 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) [2021-12-14 22:40:47,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:47,513 INFO L93 Difference]: Finished difference Result 870 states and 1257 transitions. [2021-12-14 22:40:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 22:40:47,514 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 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 24 [2021-12-14 22:40:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:47,517 INFO L225 Difference]: With dead ends: 870 [2021-12-14 22:40:47,517 INFO L226 Difference]: Without dead ends: 868 [2021-12-14 22:40:47,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2021-12-14 22:40:47,520 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 178 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:47,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 140 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 22:40:47,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-12-14 22:40:47,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 728. [2021-12-14 22:40:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 542 states have (on average 1.2011070110701108) internal successors, (651), 572 states have internal predecessors, (651), 123 states have call successors, (123), 35 states have call predecessors, (123), 57 states have return successors, (215), 120 states have call predecessors, (215), 119 states have call successors, (215) [2021-12-14 22:40:47,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 989 transitions. [2021-12-14 22:40:47,558 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 989 transitions. Word has length 24 [2021-12-14 22:40:47,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:47,559 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 989 transitions. [2021-12-14 22:40:47,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 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) [2021-12-14 22:40:47,560 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 989 transitions. [2021-12-14 22:40:47,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-14 22:40:47,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:47,562 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:47,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 22:40:47,771 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 [2021-12-14 22:40:47,771 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:40:47,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:47,772 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2021-12-14 22:40:47,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:47,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586641428] [2021-12-14 22:40:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:47,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:47,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 22:40:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 22:40:47,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:47,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586641428] [2021-12-14 22:40:47,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586641428] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:47,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608735533] [2021-12-14 22:40:47,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:47,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:47,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:47,842 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) [2021-12-14 22:40:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:47,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 22:40:47,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 22:40:47,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 22:40:47,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 22:40:47,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608735533] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:40:47,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 22:40:47,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-14 22:40:47,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106853496] [2021-12-14 22:40:47,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:40:47,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 22:40:47,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:47,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 22:40:47,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-14 22:40:47,931 INFO L87 Difference]: Start difference. First operand 728 states and 989 transitions. Second operand has 5 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:40:47,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:47,993 INFO L93 Difference]: Finished difference Result 737 states and 999 transitions. [2021-12-14 22:40:47,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 22:40:47,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-14 22:40:47,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:47,997 INFO L225 Difference]: With dead ends: 737 [2021-12-14 22:40:47,997 INFO L226 Difference]: Without dead ends: 736 [2021-12-14 22:40:47,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-14 22:40:47,998 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 41 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:47,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 111 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 22:40:47,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-12-14 22:40:48,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 727. [2021-12-14 22:40:48,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 542 states have (on average 1.1863468634686347) internal successors, (643), 571 states have internal predecessors, (643), 123 states have call successors, (123), 35 states have call predecessors, (123), 57 states have return successors, (215), 120 states have call predecessors, (215), 119 states have call successors, (215) [2021-12-14 22:40:48,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 981 transitions. [2021-12-14 22:40:48,024 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 981 transitions. Word has length 25 [2021-12-14 22:40:48,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:48,024 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 981 transitions. [2021-12-14 22:40:48,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:40:48,025 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 981 transitions. [2021-12-14 22:40:48,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-14 22:40:48,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:48,025 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] [2021-12-14 22:40:48,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 22:40:48,241 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 [2021-12-14 22:40:48,242 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:40:48,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:48,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1583952330, now seen corresponding path program 1 times [2021-12-14 22:40:48,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:48,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073715047] [2021-12-14 22:40:48,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:48,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:48,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 22:40:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 22:40:48,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:48,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073715047] [2021-12-14 22:40:48,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073715047] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:48,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672327184] [2021-12-14 22:40:48,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:48,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:48,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:48,299 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) [2021-12-14 22:40:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:48,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 22:40:48,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:48,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 22:40:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 22:40:48,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:40:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 22:40:48,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672327184] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:48,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 22:40:48,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2021-12-14 22:40:48,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126681459] [2021-12-14 22:40:48,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:40:48,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 22:40:48,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:48,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 22:40:48,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-14 22:40:48,479 INFO L87 Difference]: Start difference. First operand 727 states and 981 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:40:48,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:48,612 INFO L93 Difference]: Finished difference Result 886 states and 1251 transitions. [2021-12-14 22:40:48,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 22:40:48,612 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-12-14 22:40:48,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:48,616 INFO L225 Difference]: With dead ends: 886 [2021-12-14 22:40:48,616 INFO L226 Difference]: Without dead ends: 885 [2021-12-14 22:40:48,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-12-14 22:40:48,617 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 52 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:48,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 119 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 22:40:48,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-12-14 22:40:48,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 812. [2021-12-14 22:40:48,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 602 states have (on average 1.1843853820598007) internal successors, (713), 633 states have internal predecessors, (713), 143 states have call successors, (143), 38 states have call predecessors, (143), 62 states have return successors, (220), 140 states have call predecessors, (220), 139 states have call successors, (220) [2021-12-14 22:40:48,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1076 transitions. [2021-12-14 22:40:48,648 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1076 transitions. Word has length 28 [2021-12-14 22:40:48,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:48,648 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1076 transitions. [2021-12-14 22:40:48,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:40:48,649 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1076 transitions. [2021-12-14 22:40:48,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-14 22:40:48,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:48,651 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] [2021-12-14 22:40:48,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 22:40:48,867 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 [2021-12-14 22:40:48,868 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:40:48,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:48,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1777813581, now seen corresponding path program 1 times [2021-12-14 22:40:48,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:48,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547503465] [2021-12-14 22:40:48,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:48,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:48,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 22:40:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:48,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:40:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 22:40:48,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:48,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547503465] [2021-12-14 22:40:48,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547503465] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:48,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933502608] [2021-12-14 22:40:48,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:48,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:48,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:48,951 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) [2021-12-14 22:40:48,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 22:40:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:48,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 22:40:48,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 22:40:49,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:40:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 22:40:49,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933502608] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:40:49,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:40:49,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-12-14 22:40:49,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796928480] [2021-12-14 22:40:49,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:40:49,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 22:40:49,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:49,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 22:40:49,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-14 22:40:49,210 INFO L87 Difference]: Start difference. First operand 812 states and 1076 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) [2021-12-14 22:40:49,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:49,607 INFO L93 Difference]: Finished difference Result 1503 states and 2506 transitions. [2021-12-14 22:40:49,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 22:40:49,607 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 [2021-12-14 22:40:49,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:49,614 INFO L225 Difference]: With dead ends: 1503 [2021-12-14 22:40:49,614 INFO L226 Difference]: Without dead ends: 1501 [2021-12-14 22:40:49,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-12-14 22:40:49,616 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 146 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:49,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 172 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 22:40:49,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2021-12-14 22:40:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1258. [2021-12-14 22:40:49,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 902 states have (on average 1.1696230598669624) internal successors, (1055), 947 states have internal predecessors, (1055), 241 states have call successors, (241), 53 states have call predecessors, (241), 110 states have return successors, (548), 257 states have call predecessors, (548), 236 states have call successors, (548) [2021-12-14 22:40:49,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1844 transitions. [2021-12-14 22:40:49,686 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1844 transitions. Word has length 33 [2021-12-14 22:40:49,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:49,686 INFO L470 AbstractCegarLoop]: Abstraction has 1258 states and 1844 transitions. [2021-12-14 22:40:49,686 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) [2021-12-14 22:40:49,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1844 transitions. [2021-12-14 22:40:49,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-14 22:40:49,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:49,687 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:49,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 22:40:49,919 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 [2021-12-14 22:40:49,920 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:40:49,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:49,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1227703372, now seen corresponding path program 2 times [2021-12-14 22:40:49,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:49,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961212108] [2021-12-14 22:40:49,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:49,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:49,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 22:40:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 22:40:49,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:49,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961212108] [2021-12-14 22:40:49,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961212108] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:49,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340488271] [2021-12-14 22:40:49,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 22:40:49,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:49,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:49,988 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) [2021-12-14 22:40:49,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 22:40:50,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 22:40:50,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:40:50,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 22:40:50,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 22:40:50,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:40:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 22:40:50,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340488271] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:40:50,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:40:50,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-12-14 22:40:50,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623919448] [2021-12-14 22:40:50,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:40:50,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 22:40:50,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:50,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 22:40:50,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-12-14 22:40:50,215 INFO L87 Difference]: Start difference. First operand 1258 states and 1844 transitions. Second operand has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:40:50,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:50,678 INFO L93 Difference]: Finished difference Result 2355 states and 3821 transitions. [2021-12-14 22:40:50,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-14 22:40:50,678 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2021-12-14 22:40:50,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:50,692 INFO L225 Difference]: With dead ends: 2355 [2021-12-14 22:40:50,692 INFO L226 Difference]: Without dead ends: 2338 [2021-12-14 22:40:50,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=323, Invalid=1009, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 22:40:50,694 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 266 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:50,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 162 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 22:40:50,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2021-12-14 22:40:50,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 1753. [2021-12-14 22:40:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1280 states have (on average 1.16484375) internal successors, (1491), 1338 states have internal predecessors, (1491), 308 states have call successors, (308), 82 states have call predecessors, (308), 160 states have return successors, (829), 332 states have call predecessors, (829), 300 states have call successors, (829) [2021-12-14 22:40:50,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2628 transitions. [2021-12-14 22:40:50,780 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2628 transitions. Word has length 36 [2021-12-14 22:40:50,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:50,780 INFO L470 AbstractCegarLoop]: Abstraction has 1753 states and 2628 transitions. [2021-12-14 22:40:50,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:40:50,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2628 transitions. [2021-12-14 22:40:50,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-14 22:40:50,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:50,783 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] [2021-12-14 22:40:50,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 22:40:50,999 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 [2021-12-14 22:40:51,000 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:40:51,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:51,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1699542727, now seen corresponding path program 1 times [2021-12-14 22:40:51,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:51,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882217260] [2021-12-14 22:40:51,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:51,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:51,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 22:40:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:51,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:40:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 22:40:51,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:51,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882217260] [2021-12-14 22:40:51,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882217260] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:51,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115642547] [2021-12-14 22:40:51,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:51,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:51,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:51,075 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) [2021-12-14 22:40:51,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 22:40:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:51,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 22:40:51,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 22:40:51,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:40:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 22:40:51,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115642547] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:51,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 22:40:51,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2021-12-14 22:40:51,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89685837] [2021-12-14 22:40:51,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:40:51,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 22:40:51,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:51,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 22:40:51,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-12-14 22:40:51,328 INFO L87 Difference]: Start difference. First operand 1753 states and 2628 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) [2021-12-14 22:40:51,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:51,522 INFO L93 Difference]: Finished difference Result 1910 states and 3114 transitions. [2021-12-14 22:40:51,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 22:40:51,522 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 [2021-12-14 22:40:51,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:51,531 INFO L225 Difference]: With dead ends: 1910 [2021-12-14 22:40:51,531 INFO L226 Difference]: Without dead ends: 1909 [2021-12-14 22:40:51,532 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 [2021-12-14 22:40:51,532 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:51,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 158 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 22:40:51,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2021-12-14 22:40:51,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1734. [2021-12-14 22:40:51,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1271 states have (on average 1.163650668764752) internal successors, (1479), 1329 states have internal predecessors, (1479), 305 states have call successors, (305), 82 states have call predecessors, (305), 153 states have return successors, (696), 322 states have call predecessors, (696), 297 states have call successors, (696) [2021-12-14 22:40:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2480 transitions. [2021-12-14 22:40:51,614 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2480 transitions. Word has length 37 [2021-12-14 22:40:51,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:51,615 INFO L470 AbstractCegarLoop]: Abstraction has 1734 states and 2480 transitions. [2021-12-14 22:40:51,615 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) [2021-12-14 22:40:51,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2480 transitions. [2021-12-14 22:40:51,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 22:40:51,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:51,616 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:51,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 22:40:51,827 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 [2021-12-14 22:40:51,827 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:40:51,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:51,828 INFO L85 PathProgramCache]: Analyzing trace with hash 865218898, now seen corresponding path program 1 times [2021-12-14 22:40:51,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:51,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033834707] [2021-12-14 22:40:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:51,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:51,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 22:40:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:51,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 22:40:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:51,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 22:40:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 22:40:51,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:51,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033834707] [2021-12-14 22:40:51,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033834707] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:51,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089654846] [2021-12-14 22:40:51,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:51,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:51,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:51,863 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) [2021-12-14 22:40:51,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 22:40:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:51,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 22:40:51,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:51,961 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 22:40:51,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:40:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 22:40:52,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089654846] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:40:52,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:40:52,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2021-12-14 22:40:52,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73105779] [2021-12-14 22:40:52,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:40:52,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 22:40:52,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:52,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 22:40:52,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-14 22:40:52,120 INFO L87 Difference]: Start difference. First operand 1734 states and 2480 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-14 22:40:52,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:52,256 INFO L93 Difference]: Finished difference Result 2467 states and 3685 transitions. [2021-12-14 22:40:52,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 22:40:52,256 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 43 [2021-12-14 22:40:52,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:52,260 INFO L225 Difference]: With dead ends: 2467 [2021-12-14 22:40:52,260 INFO L226 Difference]: Without dead ends: 869 [2021-12-14 22:40:52,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-12-14 22:40:52,266 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 53 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:52,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 107 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 22:40:52,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-12-14 22:40:52,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 850. [2021-12-14 22:40:52,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 633 states have (on average 1.1342812006319116) internal successors, (718), 653 states have internal predecessors, (718), 153 states have call successors, (153), 46 states have call predecessors, (153), 60 states have return successors, (244), 150 states have call predecessors, (244), 149 states have call successors, (244) [2021-12-14 22:40:52,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1115 transitions. [2021-12-14 22:40:52,293 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1115 transitions. Word has length 43 [2021-12-14 22:40:52,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:52,293 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 1115 transitions. [2021-12-14 22:40:52,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-14 22:40:52,293 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1115 transitions. [2021-12-14 22:40:52,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 22:40:52,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:52,294 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:52,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 22:40:52,506 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 [2021-12-14 22:40:52,506 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:40:52,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:52,507 INFO L85 PathProgramCache]: Analyzing trace with hash -151680771, now seen corresponding path program 2 times [2021-12-14 22:40:52,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:52,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062221451] [2021-12-14 22:40:52,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:52,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:40:52,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:52,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062221451] [2021-12-14 22:40:52,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062221451] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:52,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097242410] [2021-12-14 22:40:52,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 22:40:52,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:52,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:52,588 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) [2021-12-14 22:40:52,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 22:40:52,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 22:40:52,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:40:52,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 22:40:52,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:40:52,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:40:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:40:52,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097242410] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:40:52,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:40:52,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-12-14 22:40:52,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166590822] [2021-12-14 22:40:52,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:40:52,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-14 22:40:52,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:52,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-14 22:40:52,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-12-14 22:40:52,813 INFO L87 Difference]: Start difference. First operand 850 states and 1115 transitions. Second operand has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:40:53,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:53,205 INFO L93 Difference]: Finished difference Result 1623 states and 2347 transitions. [2021-12-14 22:40:53,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-14 22:40:53,205 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-14 22:40:53,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:53,211 INFO L225 Difference]: With dead ends: 1623 [2021-12-14 22:40:53,211 INFO L226 Difference]: Without dead ends: 1622 [2021-12-14 22:40:53,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2021-12-14 22:40:53,212 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 419 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:53,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 379 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 22:40:53,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-12-14 22:40:53,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1510. [2021-12-14 22:40:53,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1125 states have (on average 1.1075555555555556) internal successors, (1246), 1157 states have internal predecessors, (1246), 273 states have call successors, (273), 82 states have call predecessors, (273), 108 states have return successors, (436), 270 states have call predecessors, (436), 269 states have call successors, (436) [2021-12-14 22:40:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 1955 transitions. [2021-12-14 22:40:53,264 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 1955 transitions. Word has length 44 [2021-12-14 22:40:53,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:53,265 INFO L470 AbstractCegarLoop]: Abstraction has 1510 states and 1955 transitions. [2021-12-14 22:40:53,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:40:53,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 1955 transitions. [2021-12-14 22:40:53,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 22:40:53,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:53,266 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] [2021-12-14 22:40:53,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-14 22:40:53,479 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 [2021-12-14 22:40:53,479 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:40:53,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:53,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1560392739, now seen corresponding path program 2 times [2021-12-14 22:40:53,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:53,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506508438] [2021-12-14 22:40:53,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:53,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:53,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 22:40:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:53,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:40:53,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 22:40:53,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:53,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506508438] [2021-12-14 22:40:53,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506508438] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:53,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43687040] [2021-12-14 22:40:53,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 22:40:53,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:53,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:53,545 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) [2021-12-14 22:40:53,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 22:40:53,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 22:40:53,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:40:53,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-14 22:40:53,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 22:40:53,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:40:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 22:40:53,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43687040] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:40:53,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:40:53,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2021-12-14 22:40:53,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461958524] [2021-12-14 22:40:53,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:40:53,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-14 22:40:53,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:53,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-14 22:40:53,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-12-14 22:40:53,872 INFO L87 Difference]: Start difference. First operand 1510 states and 1955 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) [2021-12-14 22:40:54,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:54,755 INFO L93 Difference]: Finished difference Result 3056 states and 4731 transitions. [2021-12-14 22:40:54,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-14 22:40:54,755 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 [2021-12-14 22:40:54,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:54,765 INFO L225 Difference]: With dead ends: 3056 [2021-12-14 22:40:54,766 INFO L226 Difference]: Without dead ends: 2163 [2021-12-14 22:40:54,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=508, Invalid=1748, Unknown=0, NotChecked=0, Total=2256 [2021-12-14 22:40:54,772 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 204 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:54,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 298 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 22:40:54,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-12-14 22:40:54,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1621. [2021-12-14 22:40:54,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1208 states have (on average 1.1018211920529801) internal successors, (1331), 1240 states have internal predecessors, (1331), 292 states have call successors, (292), 91 states have call predecessors, (292), 117 states have return successors, (461), 289 states have call predecessors, (461), 288 states have call successors, (461) [2021-12-14 22:40:54,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2084 transitions. [2021-12-14 22:40:54,844 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2084 transitions. Word has length 45 [2021-12-14 22:40:54,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:54,844 INFO L470 AbstractCegarLoop]: Abstraction has 1621 states and 2084 transitions. [2021-12-14 22:40:54,845 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) [2021-12-14 22:40:54,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2084 transitions. [2021-12-14 22:40:54,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-14 22:40:54,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:54,846 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] [2021-12-14 22:40:54,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-14 22:40:55,055 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 [2021-12-14 22:40:55,055 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:40:55,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:55,056 INFO L85 PathProgramCache]: Analyzing trace with hash 442862615, now seen corresponding path program 1 times [2021-12-14 22:40:55,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:55,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187738459] [2021-12-14 22:40:55,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:55,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:55,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 22:40:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:55,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 22:40:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:55,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:40:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:55,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 22:40:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 22:40:55,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:55,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187738459] [2021-12-14 22:40:55,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187738459] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:55,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536950185] [2021-12-14 22:40:55,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:55,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:55,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:55,180 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) [2021-12-14 22:40:55,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 22:40:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:55,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-14 22:40:55,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-14 22:40:55,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:40:55,667 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 22:40:55,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536950185] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:40:55,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:40:55,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2021-12-14 22:40:55,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161722090] [2021-12-14 22:40:55,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:40:55,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-14 22:40:55,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:55,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-14 22:40:55,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-12-14 22:40:55,669 INFO L87 Difference]: Start difference. First operand 1621 states and 2084 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) [2021-12-14 22:40:56,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:56,846 INFO L93 Difference]: Finished difference Result 4064 states and 7465 transitions. [2021-12-14 22:40:56,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-14 22:40:56,847 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 [2021-12-14 22:40:56,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:56,868 INFO L225 Difference]: With dead ends: 4064 [2021-12-14 22:40:56,869 INFO L226 Difference]: Without dead ends: 4060 [2021-12-14 22:40:56,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1682 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1158, Invalid=5004, Unknown=0, NotChecked=0, Total=6162 [2021-12-14 22:40:56,872 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 145 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:56,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 246 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 22:40:56,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4060 states. [2021-12-14 22:40:57,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4060 to 2916. [2021-12-14 22:40:57,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2015 states have (on average 1.078908188585608) internal successors, (2174), 2047 states have internal predecessors, (2174), 557 states have call successors, (557), 105 states have call predecessors, (557), 340 states have return successors, (3218), 763 states have call predecessors, (3218), 551 states have call successors, (3218) [2021-12-14 22:40:57,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 5949 transitions. [2021-12-14 22:40:57,029 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 5949 transitions. Word has length 52 [2021-12-14 22:40:57,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:57,029 INFO L470 AbstractCegarLoop]: Abstraction has 2916 states and 5949 transitions. [2021-12-14 22:40:57,030 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) [2021-12-14 22:40:57,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 5949 transitions. [2021-12-14 22:40:57,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-14 22:40:57,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:57,031 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:57,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-14 22:40:57,247 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 [2021-12-14 22:40:57,247 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:40:57,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:57,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1991697283, now seen corresponding path program 1 times [2021-12-14 22:40:57,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:57,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42786402] [2021-12-14 22:40:57,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:57,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 22:40:57,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:57,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42786402] [2021-12-14 22:40:57,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42786402] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:57,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435444090] [2021-12-14 22:40:57,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:57,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:57,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:57,342 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) [2021-12-14 22:40:57,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-14 22:40:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:57,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 22:40:57,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 22:40:57,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:40:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 22:40:57,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435444090] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:40:57,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:40:57,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-12-14 22:40:57,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538093906] [2021-12-14 22:40:57,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:40:57,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-14 22:40:57,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:57,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-14 22:40:57,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-12-14 22:40:57,652 INFO L87 Difference]: Start difference. First operand 2916 states and 5949 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) [2021-12-14 22:40:58,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:58,301 INFO L93 Difference]: Finished difference Result 7961 states and 16550 transitions. [2021-12-14 22:40:58,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-14 22:40:58,301 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 [2021-12-14 22:40:58,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:58,366 INFO L225 Difference]: With dead ends: 7961 [2021-12-14 22:40:58,367 INFO L226 Difference]: Without dead ends: 7960 [2021-12-14 22:40:58,369 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 [2021-12-14 22:40:58,370 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 891 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:58,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 323 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 22:40:58,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7960 states. [2021-12-14 22:40:58,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7960 to 7884. [2021-12-14 22:40:58,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7884 states, 5489 states have (on average 1.0814355984696666) internal successors, (5936), 5593 states have internal predecessors, (5936), 1505 states have call successors, (1505), 303 states have call predecessors, (1505), 886 states have return successors, (8678), 1987 states have call predecessors, (8678), 1499 states have call successors, (8678) [2021-12-14 22:40:58,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7884 states to 7884 states and 16119 transitions. [2021-12-14 22:40:58,785 INFO L78 Accepts]: Start accepts. Automaton has 7884 states and 16119 transitions. Word has length 58 [2021-12-14 22:40:58,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:58,785 INFO L470 AbstractCegarLoop]: Abstraction has 7884 states and 16119 transitions. [2021-12-14 22:40:58,786 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) [2021-12-14 22:40:58,786 INFO L276 IsEmpty]: Start isEmpty. Operand 7884 states and 16119 transitions. [2021-12-14 22:40:58,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-14 22:40:58,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:58,792 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] [2021-12-14 22:40:58,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-14 22:40:58,994 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 [2021-12-14 22:40:58,994 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:40:58,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:58,995 INFO L85 PathProgramCache]: Analyzing trace with hash 526800899, now seen corresponding path program 1 times [2021-12-14 22:40:58,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:58,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144391562] [2021-12-14 22:40:58,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:58,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:59,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 22:40:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:59,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 22:40:59,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:59,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:40:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:59,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 22:40:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 22:40:59,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:59,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144391562] [2021-12-14 22:40:59,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144391562] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:59,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072360710] [2021-12-14 22:40:59,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:59,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:59,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:59,087 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) [2021-12-14 22:40:59,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-14 22:40:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:59,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-14 22:40:59,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-14 22:40:59,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:40:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 22:40:59,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072360710] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:40:59,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:40:59,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2021-12-14 22:40:59,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982728927] [2021-12-14 22:40:59,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:40:59,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-14 22:40:59,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:59,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-14 22:40:59,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-12-14 22:40:59,708 INFO L87 Difference]: Start difference. First operand 7884 states and 16119 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) [2021-12-14 22:41:02,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:02,061 INFO L93 Difference]: Finished difference Result 29449 states and 111079 transitions. [2021-12-14 22:41:02,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-14 22:41:02,062 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 [2021-12-14 22:41:02,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:02,410 INFO L225 Difference]: With dead ends: 29449 [2021-12-14 22:41:02,410 INFO L226 Difference]: Without dead ends: 22920 [2021-12-14 22:41:02,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1251, Invalid=4755, Unknown=0, NotChecked=0, Total=6006 [2021-12-14 22:41:02,519 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 106 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:02,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 297 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 22:41:02,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22920 states. [2021-12-14 22:41:04,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22920 to 16604. [2021-12-14 22:41:04,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16604 states, 10900 states have (on average 1.0543119266055045) internal successors, (11492), 10965 states have internal predecessors, (11492), 3293 states have call successors, (3293), 380 states have call predecessors, (3293), 2407 states have return successors, (45164), 5258 states have call predecessors, (45164), 3282 states have call successors, (45164) [2021-12-14 22:41:04,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16604 states to 16604 states and 59949 transitions. [2021-12-14 22:41:04,377 INFO L78 Accepts]: Start accepts. Automaton has 16604 states and 59949 transitions. Word has length 56 [2021-12-14 22:41:04,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:04,377 INFO L470 AbstractCegarLoop]: Abstraction has 16604 states and 59949 transitions. [2021-12-14 22:41:04,377 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) [2021-12-14 22:41:04,378 INFO L276 IsEmpty]: Start isEmpty. Operand 16604 states and 59949 transitions. [2021-12-14 22:41:04,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-14 22:41:04,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:04,380 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:04,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-14 22:41:04,597 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 [2021-12-14 22:41:04,597 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:41:04,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:04,597 INFO L85 PathProgramCache]: Analyzing trace with hash 55857866, now seen corresponding path program 2 times [2021-12-14 22:41:04,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:04,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789962516] [2021-12-14 22:41:04,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:04,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:04,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 22:41:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:04,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:41:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:04,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 22:41:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:04,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:41:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:04,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 22:41:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-14 22:41:04,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:04,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789962516] [2021-12-14 22:41:04,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789962516] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:41:04,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893815219] [2021-12-14 22:41:04,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 22:41:04,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:04,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:41:04,720 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) [2021-12-14 22:41:04,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-14 22:41:04,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 22:41:04,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:41:04,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-14 22:41:04,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:41:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 23 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-14 22:41:04,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:41:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 80 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-14 22:41:05,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893815219] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:41:05,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:41:05,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2021-12-14 22:41:05,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003045059] [2021-12-14 22:41:05,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:41:05,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 22:41:05,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:05,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 22:41:05,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 22:41:05,517 INFO L87 Difference]: Start difference. First operand 16604 states and 59949 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) [2021-12-14 22:41:06,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:06,836 INFO L93 Difference]: Finished difference Result 25458 states and 94365 transitions. [2021-12-14 22:41:06,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-14 22:41:06,836 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 73 [2021-12-14 22:41:06,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:06,882 INFO L225 Difference]: With dead ends: 25458 [2021-12-14 22:41:06,882 INFO L226 Difference]: Without dead ends: 10209 [2021-12-14 22:41:07,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=673, Invalid=2633, Unknown=0, NotChecked=0, Total=3306 [2021-12-14 22:41:07,058 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 182 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:07,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 283 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 22:41:07,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10209 states. [2021-12-14 22:41:07,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10209 to 9706. [2021-12-14 22:41:07,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9706 states, 6743 states have (on average 1.0793415393741659) internal successors, (7278), 6950 states have internal predecessors, (7278), 1900 states have call successors, (1900), 404 states have call predecessors, (1900), 1059 states have return successors, (6461), 2351 states have call predecessors, (6461), 1892 states have call successors, (6461) [2021-12-14 22:41:07,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9706 states to 9706 states and 15639 transitions. [2021-12-14 22:41:07,640 INFO L78 Accepts]: Start accepts. Automaton has 9706 states and 15639 transitions. Word has length 73 [2021-12-14 22:41:07,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:07,641 INFO L470 AbstractCegarLoop]: Abstraction has 9706 states and 15639 transitions. [2021-12-14 22:41:07,641 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) [2021-12-14 22:41:07,641 INFO L276 IsEmpty]: Start isEmpty. Operand 9706 states and 15639 transitions. [2021-12-14 22:41:07,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 22:41:07,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:07,643 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] [2021-12-14 22:41:07,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-14 22:41:07,858 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 [2021-12-14 22:41:07,859 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:41:07,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:07,859 INFO L85 PathProgramCache]: Analyzing trace with hash -131434271, now seen corresponding path program 3 times [2021-12-14 22:41:07,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:07,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23724816] [2021-12-14 22:41:07,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:07,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:07,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 22:41:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:07,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:41:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 22:41:07,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:07,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23724816] [2021-12-14 22:41:07,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23724816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:41:07,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924957130] [2021-12-14 22:41:07,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 22:41:07,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:07,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:41:07,978 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) [2021-12-14 22:41:07,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-14 22:41:08,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-14 22:41:08,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:41:08,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-14 22:41:08,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:41:08,154 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 22:41:08,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:41:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 65 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 22:41:08,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924957130] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:41:08,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:41:08,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2021-12-14 22:41:08,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480897180] [2021-12-14 22:41:08,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:41:08,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-14 22:41:08,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:08,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-14 22:41:08,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-12-14 22:41:08,471 INFO L87 Difference]: Start difference. First operand 9706 states and 15639 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) [2021-12-14 22:41:09,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:09,313 INFO L93 Difference]: Finished difference Result 10357 states and 16637 transitions. [2021-12-14 22:41:09,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-14 22:41:09,313 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 [2021-12-14 22:41:09,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:09,345 INFO L225 Difference]: With dead ends: 10357 [2021-12-14 22:41:09,345 INFO L226 Difference]: Without dead ends: 10356 [2021-12-14 22:41:09,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=577, Invalid=1973, Unknown=0, NotChecked=0, Total=2550 [2021-12-14 22:41:09,351 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 203 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:09,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 249 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 22:41:09,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10356 states. [2021-12-14 22:41:09,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10356 to 9814. [2021-12-14 22:41:09,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9814 states, 6815 states have (on average 1.074688187820983) internal successors, (7324), 7022 states have internal predecessors, (7324), 1900 states have call successors, (1900), 404 states have call predecessors, (1900), 1095 states have return successors, (6555), 2387 states have call predecessors, (6555), 1892 states have call successors, (6555) [2021-12-14 22:41:09,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9814 states to 9814 states and 15779 transitions. [2021-12-14 22:41:09,900 INFO L78 Accepts]: Start accepts. Automaton has 9814 states and 15779 transitions. Word has length 69 [2021-12-14 22:41:09,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:09,901 INFO L470 AbstractCegarLoop]: Abstraction has 9814 states and 15779 transitions. [2021-12-14 22:41:09,901 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) [2021-12-14 22:41:09,901 INFO L276 IsEmpty]: Start isEmpty. Operand 9814 states and 15779 transitions. [2021-12-14 22:41:09,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-14 22:41:09,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:09,904 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 7, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:09,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-14 22:41:10,119 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 [2021-12-14 22:41:10,120 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:41:10,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:10,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1701452426, now seen corresponding path program 2 times [2021-12-14 22:41:10,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:10,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108756024] [2021-12-14 22:41:10,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:10,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:10,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 22:41:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:10,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:41:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:10,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 22:41:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:10,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 22:41:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:10,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:41:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:10,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 22:41:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:10,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 22:41:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:10,206 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 136 proven. 24 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-14 22:41:10,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:10,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108756024] [2021-12-14 22:41:10,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108756024] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:41:10,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798425433] [2021-12-14 22:41:10,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 22:41:10,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:10,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:41:10,208 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) [2021-12-14 22:41:10,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-14 22:41:10,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 22:41:10,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:41:10,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 22:41:10,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:41:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 136 proven. 15 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-12-14 22:41:10,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:41:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 136 proven. 26 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-14 22:41:10,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798425433] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:41:10,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:41:10,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2021-12-14 22:41:10,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794732754] [2021-12-14 22:41:10,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:41:10,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 22:41:10,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:10,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 22:41:10,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-14 22:41:10,722 INFO L87 Difference]: Start difference. First operand 9814 states and 15779 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) [2021-12-14 22:41:11,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:11,164 INFO L93 Difference]: Finished difference Result 18932 states and 34355 transitions. [2021-12-14 22:41:11,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 22:41:11,165 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 104 [2021-12-14 22:41:11,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:11,208 INFO L225 Difference]: With dead ends: 18932 [2021-12-14 22:41:11,208 INFO L226 Difference]: Without dead ends: 10758 [2021-12-14 22:41:11,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-12-14 22:41:11,250 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 54 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:11,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 93 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 22:41:11,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10758 states. [2021-12-14 22:41:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10758 to 9808. [2021-12-14 22:41:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9808 states, 6812 states have (on average 1.0747210804462712) internal successors, (7321), 7019 states have internal predecessors, (7321), 1897 states have call successors, (1897), 404 states have call predecessors, (1897), 1095 states have return successors, (6475), 2384 states have call predecessors, (6475), 1862 states have call successors, (6475) [2021-12-14 22:41:11,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9808 states to 9808 states and 15693 transitions. [2021-12-14 22:41:11,730 INFO L78 Accepts]: Start accepts. Automaton has 9808 states and 15693 transitions. Word has length 104 [2021-12-14 22:41:11,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:11,731 INFO L470 AbstractCegarLoop]: Abstraction has 9808 states and 15693 transitions. [2021-12-14 22:41:11,731 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) [2021-12-14 22:41:11,731 INFO L276 IsEmpty]: Start isEmpty. Operand 9808 states and 15693 transitions. [2021-12-14 22:41:11,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-14 22:41:11,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:11,735 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] [2021-12-14 22:41:11,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-14 22:41:11,939 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 [2021-12-14 22:41:11,939 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:41:11,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:11,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1897499616, now seen corresponding path program 3 times [2021-12-14 22:41:11,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:11,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207003421] [2021-12-14 22:41:11,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:11,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:11,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 22:41:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:11,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 22:41:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:11,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 22:41:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:12,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:41:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:12,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 22:41:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:12,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:41:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:12,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 22:41:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:12,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 22:41:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:12,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 22:41:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 113 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-14 22:41:12,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:12,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207003421] [2021-12-14 22:41:12,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207003421] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:41:12,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480429114] [2021-12-14 22:41:12,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 22:41:12,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:12,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:41:12,073 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) [2021-12-14 22:41:12,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-14 22:41:12,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-14 22:41:12,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:41:12,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 22:41:12,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:41:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 150 proven. 26 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-14 22:41:12,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:41:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 119 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-14 22:41:12,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480429114] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:41:12,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:41:12,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2021-12-14 22:41:12,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964824311] [2021-12-14 22:41:12,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:41:12,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 22:41:12,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:12,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 22:41:12,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-12-14 22:41:12,932 INFO L87 Difference]: Start difference. First operand 9808 states and 15693 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) [2021-12-14 22:41:13,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:13,564 INFO L93 Difference]: Finished difference Result 20497 states and 41620 transitions. [2021-12-14 22:41:13,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 22:41:13,565 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 [2021-12-14 22:41:13,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:13,626 INFO L225 Difference]: With dead ends: 20497 [2021-12-14 22:41:13,626 INFO L226 Difference]: Without dead ends: 12358 [2021-12-14 22:41:13,683 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 [2021-12-14 22:41:13,683 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 90 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:13,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 122 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 22:41:13,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12358 states. [2021-12-14 22:41:14,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12358 to 11997. [2021-12-14 22:41:14,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11997 states, 8101 states have (on average 1.054684606838662) internal successors, (8544), 8288 states have internal predecessors, (8544), 2417 states have call successors, (2417), 424 states have call predecessors, (2417), 1475 states have return successors, (8115), 3284 states have call predecessors, (8115), 2362 states have call successors, (8115) [2021-12-14 22:41:14,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11997 states to 11997 states and 19076 transitions. [2021-12-14 22:41:14,380 INFO L78 Accepts]: Start accepts. Automaton has 11997 states and 19076 transitions. Word has length 99 [2021-12-14 22:41:14,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:14,381 INFO L470 AbstractCegarLoop]: Abstraction has 11997 states and 19076 transitions. [2021-12-14 22:41:14,381 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) [2021-12-14 22:41:14,381 INFO L276 IsEmpty]: Start isEmpty. Operand 11997 states and 19076 transitions. [2021-12-14 22:41:14,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-14 22:41:14,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:14,387 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] [2021-12-14 22:41:14,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-14 22:41:14,602 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 [2021-12-14 22:41:14,602 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:41:14,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:14,603 INFO L85 PathProgramCache]: Analyzing trace with hash -127918165, now seen corresponding path program 3 times [2021-12-14 22:41:14,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:14,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927476172] [2021-12-14 22:41:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:14,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:14,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 22:41:14,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:14,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 22:41:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:14,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:41:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:14,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 22:41:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 122 proven. 90 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 22:41:14,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:14,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927476172] [2021-12-14 22:41:14,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927476172] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:41:14,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941918383] [2021-12-14 22:41:14,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 22:41:14,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:14,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:41:14,808 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) [2021-12-14 22:41:14,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-14 22:41:14,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-14 22:41:14,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:41:14,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-14 22:41:14,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:41:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 119 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-14 22:41:15,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:41:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-14 22:41:15,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941918383] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:41:15,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:41:15,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2021-12-14 22:41:15,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641841994] [2021-12-14 22:41:15,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:41:15,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-14 22:41:15,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:15,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-14 22:41:15,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-12-14 22:41:15,218 INFO L87 Difference]: Start difference. First operand 11997 states and 19076 transitions. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-14 22:41:16,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:16,688 INFO L93 Difference]: Finished difference Result 20852 states and 35642 transitions. [2021-12-14 22:41:16,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-14 22:41:16,689 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 [2021-12-14 22:41:16,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:16,735 INFO L225 Difference]: With dead ends: 20852 [2021-12-14 22:41:16,735 INFO L226 Difference]: Without dead ends: 10359 [2021-12-14 22:41:16,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=989, Invalid=3433, Unknown=0, NotChecked=0, Total=4422 [2021-12-14 22:41:16,808 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 212 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:16,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 168 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 22:41:16,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10359 states. [2021-12-14 22:41:17,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10359 to 8741. [2021-12-14 22:41:17,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8741 states, 5968 states have (on average 1.0464142091152815) internal successors, (6245), 6144 states have internal predecessors, (6245), 1711 states have call successors, (1711), 352 states have call predecessors, (1711), 1058 states have return successors, (4097), 2244 states have call predecessors, (4097), 1677 states have call successors, (4097) [2021-12-14 22:41:17,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8741 states to 8741 states and 12053 transitions. [2021-12-14 22:41:17,322 INFO L78 Accepts]: Start accepts. Automaton has 8741 states and 12053 transitions. Word has length 88 [2021-12-14 22:41:17,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:17,323 INFO L470 AbstractCegarLoop]: Abstraction has 8741 states and 12053 transitions. [2021-12-14 22:41:17,323 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) [2021-12-14 22:41:17,323 INFO L276 IsEmpty]: Start isEmpty. Operand 8741 states and 12053 transitions. [2021-12-14 22:41:17,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-14 22:41:17,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:17,328 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] [2021-12-14 22:41:17,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-14 22:41:17,543 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 [2021-12-14 22:41:17,543 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:41:17,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:17,544 INFO L85 PathProgramCache]: Analyzing trace with hash -635779733, now seen corresponding path program 4 times [2021-12-14 22:41:17,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:17,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596301011] [2021-12-14 22:41:17,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:17,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:17,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 22:41:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:17,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 22:41:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:17,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 22:41:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:17,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 22:41:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:17,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:41:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:17,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 22:41:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:17,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 22:41:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:17,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 22:41:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 51 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-14 22:41:17,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:17,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596301011] [2021-12-14 22:41:17,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596301011] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:41:17,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356087474] [2021-12-14 22:41:17,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 22:41:17,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:17,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:41:17,724 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) [2021-12-14 22:41:17,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-14 22:41:17,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 22:41:17,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:41:17,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-14 22:41:17,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:41:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 67 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-14 22:41:17,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:41:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 42 proven. 89 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-14 22:41:19,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356087474] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:41:19,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:41:19,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2021-12-14 22:41:19,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163931657] [2021-12-14 22:41:19,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:41:19,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-14 22:41:19,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:19,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-14 22:41:19,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-12-14 22:41:19,048 INFO L87 Difference]: Start difference. First operand 8741 states and 12053 transitions. Second operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2021-12-14 22:41:22,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:22,457 INFO L93 Difference]: Finished difference Result 29169 states and 46148 transitions. [2021-12-14 22:41:22,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-12-14 22:41:22,457 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 [2021-12-14 22:41:22,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:22,575 INFO L225 Difference]: With dead ends: 29169 [2021-12-14 22:41:22,575 INFO L226 Difference]: Without dead ends: 28067 [2021-12-14 22:41:22,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12268 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5458, Invalid=27122, Unknown=0, NotChecked=0, Total=32580 [2021-12-14 22:41:22,604 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 176 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 793 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 793 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:22,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 280 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [793 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 22:41:22,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28067 states. [2021-12-14 22:41:23,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28067 to 17311. [2021-12-14 22:41:23,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17311 states, 11232 states have (on average 1.0269764957264957) internal successors, (11535), 11391 states have internal predecessors, (11535), 3626 states have call successors, (3626), 460 states have call predecessors, (3626), 2449 states have return successors, (11770), 5459 states have call predecessors, (11770), 3572 states have call successors, (11770) [2021-12-14 22:41:23,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17311 states to 17311 states and 26931 transitions. [2021-12-14 22:41:23,594 INFO L78 Accepts]: Start accepts. Automaton has 17311 states and 26931 transitions. Word has length 90 [2021-12-14 22:41:23,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:23,595 INFO L470 AbstractCegarLoop]: Abstraction has 17311 states and 26931 transitions. [2021-12-14 22:41:23,595 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) [2021-12-14 22:41:23,595 INFO L276 IsEmpty]: Start isEmpty. Operand 17311 states and 26931 transitions. [2021-12-14 22:41:23,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-14 22:41:23,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:23,598 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:23,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-14 22:41:23,811 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 [2021-12-14 22:41:23,811 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:41:23,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:23,812 INFO L85 PathProgramCache]: Analyzing trace with hash 147414137, now seen corresponding path program 3 times [2021-12-14 22:41:23,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:23,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567618512] [2021-12-14 22:41:23,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:23,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:41:24,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:24,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567618512] [2021-12-14 22:41:24,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567618512] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:41:24,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168119176] [2021-12-14 22:41:24,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 22:41:24,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:24,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:41:24,018 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) [2021-12-14 22:41:24,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-14 22:41:24,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-14 22:41:24,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:41:24,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 22:41:24,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:41:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:41:24,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:41:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:41:24,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168119176] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:41:24,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:41:24,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-12-14 22:41:24,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768478240] [2021-12-14 22:41:24,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:41:24,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-14 22:41:24,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:24,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-14 22:41:24,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2021-12-14 22:41:24,711 INFO L87 Difference]: Start difference. First operand 17311 states and 26931 transitions. Second operand has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:41:26,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:26,664 INFO L93 Difference]: Finished difference Result 28628 states and 44547 transitions. [2021-12-14 22:41:26,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-14 22:41:26,664 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-14 22:41:26,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:26,756 INFO L225 Difference]: With dead ends: 28628 [2021-12-14 22:41:26,756 INFO L226 Difference]: Without dead ends: 28627 [2021-12-14 22:41:26,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2021-12-14 22:41:26,766 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 937 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:26,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [941 Valid, 777 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 22:41:26,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28627 states. [2021-12-14 22:41:28,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28627 to 28627. [2021-12-14 22:41:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28627 states, 18540 states have (on average 1.0279935275080907) internal successors, (19059), 18915 states have internal predecessors, (19059), 5846 states have call successors, (5846), 676 states have call predecessors, (5846), 4237 states have return successors, (19630), 9035 states have call predecessors, (19630), 5792 states have call successors, (19630) [2021-12-14 22:41:28,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28627 states to 28627 states and 44535 transitions. [2021-12-14 22:41:28,228 INFO L78 Accepts]: Start accepts. Automaton has 28627 states and 44535 transitions. Word has length 92 [2021-12-14 22:41:28,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:28,229 INFO L470 AbstractCegarLoop]: Abstraction has 28627 states and 44535 transitions. [2021-12-14 22:41:28,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:41:28,229 INFO L276 IsEmpty]: Start isEmpty. Operand 28627 states and 44535 transitions. [2021-12-14 22:41:28,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-14 22:41:28,239 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:28,239 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:28,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-14 22:41:28,455 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 [2021-12-14 22:41:28,455 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:41:28,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:28,456 INFO L85 PathProgramCache]: Analyzing trace with hash -570444405, now seen corresponding path program 2 times [2021-12-14 22:41:28,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:28,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311145400] [2021-12-14 22:41:28,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:28,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-14 22:41:28,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:28,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311145400] [2021-12-14 22:41:28,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311145400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:41:28,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088934490] [2021-12-14 22:41:28,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 22:41:28,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:28,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:41:28,683 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) [2021-12-14 22:41:28,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-14 22:41:28,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 22:41:28,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:41:28,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-14 22:41:28,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:41:28,990 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-14 22:41:28,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:41:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-14 22:41:29,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088934490] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:41:29,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:41:29,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-12-14 22:41:29,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184467239] [2021-12-14 22:41:29,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:41:29,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-14 22:41:29,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:29,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-14 22:41:29,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2021-12-14 22:41:29,514 INFO L87 Difference]: Start difference. First operand 28627 states and 44535 transitions. Second operand has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:41:32,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:32,728 INFO L93 Difference]: Finished difference Result 64728 states and 101341 transitions. [2021-12-14 22:41:32,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-14 22:41:32,728 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 [2021-12-14 22:41:32,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:32,972 INFO L225 Difference]: With dead ends: 64728 [2021-12-14 22:41:32,972 INFO L226 Difference]: Without dead ends: 64727 [2021-12-14 22:41:33,008 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 [2021-12-14 22:41:33,008 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2278 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 847 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2281 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 847 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:33,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2281 Valid, 549 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [847 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 22:41:33,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64727 states. [2021-12-14 22:41:35,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64727 to 64675. [2021-12-14 22:41:35,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64675 states, 41976 states have (on average 1.028659233847913) internal successors, (43179), 42843 states have internal predecessors, (43179), 13190 states have call successors, (13190), 1564 states have call predecessors, (13190), 9505 states have return successors, (44950), 20267 states have call predecessors, (44950), 13076 states have call successors, (44950) [2021-12-14 22:41:36,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64675 states to 64675 states and 101319 transitions. [2021-12-14 22:41:36,268 INFO L78 Accepts]: Start accepts. Automaton has 64675 states and 101319 transitions. Word has length 142 [2021-12-14 22:41:36,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:36,270 INFO L470 AbstractCegarLoop]: Abstraction has 64675 states and 101319 transitions. [2021-12-14 22:41:36,270 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) [2021-12-14 22:41:36,270 INFO L276 IsEmpty]: Start isEmpty. Operand 64675 states and 101319 transitions. [2021-12-14 22:41:36,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-14 22:41:36,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:36,286 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 14, 10, 10, 10, 9, 9, 9, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:36,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-14 22:41:36,503 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 [2021-12-14 22:41:36,503 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-14 22:41:36,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:36,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1518151305, now seen corresponding path program 1 times [2021-12-14 22:41:36,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:36,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372769499] [2021-12-14 22:41:36,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:36,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:36,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 22:41:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:36,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:41:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:36,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 22:41:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:36,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:41:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:36,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 22:41:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:36,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:41:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:36,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 22:41:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:36,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 22:41:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:36,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 22:41:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:36,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 22:41:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:36,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 22:41:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:36,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 22:41:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:36,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 22:41:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:36,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 22:41:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:36,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 22:41:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:36,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 22:41:36,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:36,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-14 22:41:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 445 proven. 214 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2021-12-14 22:41:36,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:36,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372769499] [2021-12-14 22:41:36,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372769499] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:41:36,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857858085] [2021-12-14 22:41:36,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:36,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:36,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:41:36,994 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) [2021-12-14 22:41:36,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-14 22:41:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:37,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-14 22:41:37,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:41:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 433 proven. 216 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2021-12-14 22:41:37,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:41:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 449 proven. 263 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2021-12-14 22:41:39,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857858085] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:41:39,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:41:39,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 21] total 27 [2021-12-14 22:41:39,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144800518] [2021-12-14 22:41:39,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:41:39,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-14 22:41:39,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:39,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-14 22:41:39,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-12-14 22:41:39,225 INFO L87 Difference]: Start difference. First operand 64675 states and 101319 transitions. Second operand has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 24 states have internal predecessors, (122), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) [2021-12-14 22:41:43,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:43,586 INFO L93 Difference]: Finished difference Result 152847 states and 310280 transitions. [2021-12-14 22:41:43,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-14 22:41:43,586 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 193 [2021-12-14 22:41:43,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:44,053 INFO L225 Difference]: With dead ends: 152847 [2021-12-14 22:41:44,053 INFO L226 Difference]: Without dead ends: 94875