./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Ackermann03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/Ackermann03.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-19 14:59:37,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-19 14:59:37,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-19 14:59:37,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-19 14:59:37,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-19 14:59:37,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-19 14:59:37,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-19 14:59:37,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-19 14:59:37,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-19 14:59:37,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-19 14:59:37,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-19 14:59:37,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-19 14:59:37,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-19 14:59:37,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-19 14:59:37,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-19 14:59:37,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-19 14:59:37,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-19 14:59:37,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-19 14:59:37,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-19 14:59:37,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-19 14:59:37,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-19 14:59:37,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-19 14:59:37,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-19 14:59:37,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-19 14:59:37,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-19 14:59:37,138 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-19 14:59:37,138 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-19 14:59:37,139 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-19 14:59:37,140 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-19 14:59:37,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-19 14:59:37,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-19 14:59:37,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-19 14:59:37,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-19 14:59:37,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-19 14:59:37,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-19 14:59:37,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-19 14:59:37,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-19 14:59:37,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-19 14:59:37,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-19 14:59:37,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-19 14:59:37,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-19 14:59:37,148 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-12-19 14:59:37,178 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-19 14:59:37,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-19 14:59:37,179 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-19 14:59:37,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-19 14:59:37,180 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-19 14:59:37,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-19 14:59:37,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-19 14:59:37,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-19 14:59:37,181 INFO L138 SettingsManager]: * Use SBE=true [2021-12-19 14:59:37,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-19 14:59:37,182 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-19 14:59:37,182 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-19 14:59:37,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-19 14:59:37,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-19 14:59:37,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-19 14:59:37,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-19 14:59:37,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-19 14:59:37,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-19 14:59:37,183 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-19 14:59:37,184 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-19 14:59:37,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-19 14:59:37,184 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-19 14:59:37,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-19 14:59:37,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-19 14:59:37,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-19 14:59:37,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-19 14:59:37,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-19 14:59:37,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-19 14:59:37,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-19 14:59:37,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-19 14:59:37,187 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-19 14:59:37,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-19 14:59:37,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-19 14:59:37,187 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-19 14:59:37,188 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd [2021-12-19 14:59:37,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-19 14:59:37,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-19 14:59:37,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-19 14:59:37,426 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-19 14:59:37,427 INFO L275 PluginConnector]: CDTParser initialized [2021-12-19 14:59:37,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann03.c [2021-12-19 14:59:37,502 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f97044da8/7438170b671441079764d9af40dcd4fb/FLAGa709436bf [2021-12-19 14:59:37,870 INFO L306 CDTParser]: Found 1 translation units. [2021-12-19 14:59:37,871 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann03.c [2021-12-19 14:59:37,879 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f97044da8/7438170b671441079764d9af40dcd4fb/FLAGa709436bf [2021-12-19 14:59:37,892 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f97044da8/7438170b671441079764d9af40dcd4fb [2021-12-19 14:59:37,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-19 14:59:37,897 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-19 14:59:37,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-19 14:59:37,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-19 14:59:37,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-19 14:59:37,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 02:59:37" (1/1) ... [2021-12-19 14:59:37,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42c1c413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:37, skipping insertion in model container [2021-12-19 14:59:37,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 02:59:37" (1/1) ... [2021-12-19 14:59:37,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-19 14:59:37,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-19 14:59:38,067 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann03.c[1168,1181] [2021-12-19 14:59:38,068 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-19 14:59:38,081 INFO L203 MainTranslator]: Completed pre-run [2021-12-19 14:59:38,096 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann03.c[1168,1181] [2021-12-19 14:59:38,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-19 14:59:38,107 INFO L208 MainTranslator]: Completed translation [2021-12-19 14:59:38,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:38 WrapperNode [2021-12-19 14:59:38,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-19 14:59:38,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-19 14:59:38,109 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-19 14:59:38,109 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-19 14:59:38,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:38" (1/1) ... [2021-12-19 14:59:38,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:38" (1/1) ... [2021-12-19 14:59:38,136 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2021-12-19 14:59:38,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-19 14:59:38,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-19 14:59:38,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-19 14:59:38,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-19 14:59:38,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:38" (1/1) ... [2021-12-19 14:59:38,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:38" (1/1) ... [2021-12-19 14:59:38,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:38" (1/1) ... [2021-12-19 14:59:38,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:38" (1/1) ... [2021-12-19 14:59:38,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:38" (1/1) ... [2021-12-19 14:59:38,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:38" (1/1) ... [2021-12-19 14:59:38,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:38" (1/1) ... [2021-12-19 14:59:38,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-19 14:59:38,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-19 14:59:38,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-19 14:59:38,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-19 14:59:38,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:38" (1/1) ... [2021-12-19 14:59:38,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-19 14:59:38,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:38,180 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-19 14:59:38,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-19 14:59:38,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-19 14:59:38,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-19 14:59:38,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-19 14:59:38,216 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2021-12-19 14:59:38,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2021-12-19 14:59:38,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-19 14:59:38,263 INFO L236 CfgBuilder]: Building ICFG [2021-12-19 14:59:38,264 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-19 14:59:38,382 INFO L277 CfgBuilder]: Performing block encoding [2021-12-19 14:59:38,389 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-19 14:59:38,393 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-19 14:59:38,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 02:59:38 BoogieIcfgContainer [2021-12-19 14:59:38,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-19 14:59:38,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-19 14:59:38,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-19 14:59:38,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-19 14:59:38,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 02:59:37" (1/3) ... [2021-12-19 14:59:38,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49ccc780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 02:59:38, skipping insertion in model container [2021-12-19 14:59:38,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:38" (2/3) ... [2021-12-19 14:59:38,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49ccc780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 02:59:38, skipping insertion in model container [2021-12-19 14:59:38,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 02:59:38" (3/3) ... [2021-12-19 14:59:38,415 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2021-12-19 14:59:38,423 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-19 14:59:38,424 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-12-19 14:59:38,484 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-19 14:59:38,492 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-19 14:59:38,493 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-12-19 14:59:38,510 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-19 14:59:38,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-19 14:59:38,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:38,519 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:38,520 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:38,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:38,525 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2021-12-19 14:59:38,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:38,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358705545] [2021-12-19 14:59:38,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:38,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:38,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:38,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358705545] [2021-12-19 14:59:38,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358705545] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 14:59:38,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 14:59:38,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-19 14:59:38,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519350614] [2021-12-19 14:59:38,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:59:38,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-19 14:59:38,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:38,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-19 14:59:38,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-19 14:59:38,741 INFO L87 Difference]: Start difference. First operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:38,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:38,884 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-12-19 14:59:38,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-19 14:59:38,887 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-19 14:59:38,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:38,902 INFO L225 Difference]: With dead ends: 73 [2021-12-19 14:59:38,902 INFO L226 Difference]: Without dead ends: 59 [2021-12-19 14:59:38,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-19 14:59:38,911 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 [2021-12-19 14:59:38,912 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] [2021-12-19 14:59:38,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-19 14:59:38,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2021-12-19 14:59:38,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 42 states have internal predecessors, (52), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-19 14:59:38,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2021-12-19 14:59:38,963 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2021-12-19 14:59:38,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:38,964 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2021-12-19 14:59:38,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:38,964 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2021-12-19 14:59:38,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-19 14:59:38,965 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:38,965 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:38,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-19 14:59:38,967 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:38,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:38,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2021-12-19 14:59:38,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:38,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530330155] [2021-12-19 14:59:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:38,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:39,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:39,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530330155] [2021-12-19 14:59:39,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530330155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 14:59:39,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 14:59:39,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-19 14:59:39,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556787443] [2021-12-19 14:59:39,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:59:39,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-19 14:59:39,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:39,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-19 14:59:39,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-19 14:59:39,041 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:39,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:39,156 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-12-19 14:59:39,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-19 14:59:39,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-19 14:59:39,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:39,158 INFO L225 Difference]: With dead ends: 51 [2021-12-19 14:59:39,158 INFO L226 Difference]: Without dead ends: 49 [2021-12-19 14:59:39,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-19 14:59:39,160 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:39,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 47 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:59:39,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-19 14:59:39,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-19 14:59:39,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.411764705882353) internal successors, (48), 40 states have internal predecessors, (48), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-19 14:59:39,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2021-12-19 14:59:39,168 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 9 [2021-12-19 14:59:39,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:39,168 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2021-12-19 14:59:39,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:39,168 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2021-12-19 14:59:39,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-19 14:59:39,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:39,169 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:39,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-19 14:59:39,170 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:39,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:39,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2021-12-19 14:59:39,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:39,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843415131] [2021-12-19 14:59:39,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:39,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:39,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:39,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:39,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843415131] [2021-12-19 14:59:39,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843415131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 14:59:39,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 14:59:39,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-19 14:59:39,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706952536] [2021-12-19 14:59:39,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:59:39,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-19 14:59:39,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:39,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-19 14:59:39,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-19 14:59:39,206 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:39,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:39,274 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-12-19 14:59:39,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-19 14:59:39,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-19 14:59:39,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:39,276 INFO L225 Difference]: With dead ends: 76 [2021-12-19 14:59:39,276 INFO L226 Difference]: Without dead ends: 74 [2021-12-19 14:59:39,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-19 14:59:39,278 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 39 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:39,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 104 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-19 14:59:39,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-19 14:59:39,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-12-19 14:59:39,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 55 states have internal predecessors, (67), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-19 14:59:39,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2021-12-19 14:59:39,297 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 9 [2021-12-19 14:59:39,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:39,298 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2021-12-19 14:59:39,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:39,298 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2021-12-19 14:59:39,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-19 14:59:39,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:39,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:39,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-19 14:59:39,300 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:39,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:39,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2021-12-19 14:59:39,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:39,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082259980] [2021-12-19 14:59:39,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:39,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:39,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:39,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082259980] [2021-12-19 14:59:39,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082259980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 14:59:39,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 14:59:39,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-19 14:59:39,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755773991] [2021-12-19 14:59:39,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:59:39,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-19 14:59:39,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:39,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-19 14:59:39,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-19 14:59:39,356 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:39,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:39,409 INFO L93 Difference]: Finished difference Result 116 states and 154 transitions. [2021-12-19 14:59:39,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-19 14:59:39,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-19 14:59:39,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:39,411 INFO L225 Difference]: With dead ends: 116 [2021-12-19 14:59:39,411 INFO L226 Difference]: Without dead ends: 108 [2021-12-19 14:59:39,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-19 14:59:39,413 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 39 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:39,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 103 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-19 14:59:39,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-19 14:59:39,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2021-12-19 14:59:39,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 81 states have internal predecessors, (97), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-19 14:59:39,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2021-12-19 14:59:39,428 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 10 [2021-12-19 14:59:39,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:39,429 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2021-12-19 14:59:39,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:39,429 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2021-12-19 14:59:39,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-19 14:59:39,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:39,430 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:39,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-19 14:59:39,430 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:39,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:39,431 INFO L85 PathProgramCache]: Analyzing trace with hash 219392943, now seen corresponding path program 1 times [2021-12-19 14:59:39,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:39,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565747429] [2021-12-19 14:59:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:39,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:39,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:39,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565747429] [2021-12-19 14:59:39,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565747429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 14:59:39,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 14:59:39,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-19 14:59:39,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432672431] [2021-12-19 14:59:39,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:59:39,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-19 14:59:39,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:39,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-19 14:59:39,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-19 14:59:39,467 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:39,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:39,506 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2021-12-19 14:59:39,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-19 14:59:39,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-19 14:59:39,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:39,508 INFO L225 Difference]: With dead ends: 168 [2021-12-19 14:59:39,508 INFO L226 Difference]: Without dead ends: 97 [2021-12-19 14:59:39,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-19 14:59:39,510 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:39,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 89 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-19 14:59:39,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-19 14:59:39,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-12-19 14:59:39,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.295774647887324) internal successors, (92), 78 states have internal predecessors, (92), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-19 14:59:39,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2021-12-19 14:59:39,521 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 16 [2021-12-19 14:59:39,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:39,522 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2021-12-19 14:59:39,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:39,522 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2021-12-19 14:59:39,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-19 14:59:39,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:39,523 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:39,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-19 14:59:39,523 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:39,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:39,524 INFO L85 PathProgramCache]: Analyzing trace with hash 219399894, now seen corresponding path program 1 times [2021-12-19 14:59:39,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:39,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284830227] [2021-12-19 14:59:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:39,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:39,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:39,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284830227] [2021-12-19 14:59:39,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284830227] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:39,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933638655] [2021-12-19 14:59:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:39,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:39,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:39,573 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:59:39,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-19 14:59:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:39,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-19 14:59:39,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:39,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:39,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:39,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:39,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933638655] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:39,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:39,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-19 14:59:39,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901457204] [2021-12-19 14:59:39,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:39,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-19 14:59:39,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:39,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-19 14:59:39,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-19 14:59:39,844 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:40,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:40,082 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2021-12-19 14:59:40,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-19 14:59:40,084 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-19 14:59:40,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:40,093 INFO L225 Difference]: With dead ends: 274 [2021-12-19 14:59:40,093 INFO L226 Difference]: Without dead ends: 272 [2021-12-19 14:59:40,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-12-19 14:59:40,101 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 [2021-12-19 14:59:40,102 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] [2021-12-19 14:59:40,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-19 14:59:40,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2021-12-19 14:59:40,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 182 states have (on average 1.2637362637362637) internal successors, (230), 189 states have internal predecessors, (230), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-19 14:59:40,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2021-12-19 14:59:40,131 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 16 [2021-12-19 14:59:40,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:40,132 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2021-12-19 14:59:40,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:40,132 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2021-12-19 14:59:40,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-19 14:59:40,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:40,133 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:40,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:40,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-19 14:59:40,356 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:40,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:40,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1162887243, now seen corresponding path program 1 times [2021-12-19 14:59:40,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:40,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536600764] [2021-12-19 14:59:40,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:40,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:40,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:40,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:40,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536600764] [2021-12-19 14:59:40,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536600764] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:40,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117606488] [2021-12-19 14:59:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:40,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:40,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:40,417 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:59:40,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-19 14:59:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:40,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-19 14:59:40,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:40,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:40,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117606488] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:40,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:40,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-19 14:59:40,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337959442] [2021-12-19 14:59:40,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:40,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-19 14:59:40,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:40,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-19 14:59:40,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-19 14:59:40,580 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 12 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:40,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:40,799 INFO L93 Difference]: Finished difference Result 512 states and 695 transitions. [2021-12-19 14:59:40,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-19 14:59:40,800 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-19 14:59:40,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:40,804 INFO L225 Difference]: With dead ends: 512 [2021-12-19 14:59:40,804 INFO L226 Difference]: Without dead ends: 510 [2021-12-19 14:59:40,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-12-19 14:59:40,805 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 196 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:40,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 194 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:59:40,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-12-19 14:59:40,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 445. [2021-12-19 14:59:40,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 347 states have (on average 1.2276657060518732) internal successors, (426), 354 states have internal predecessors, (426), 69 states have call successors, (69), 24 states have call predecessors, (69), 23 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-12-19 14:59:40,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 561 transitions. [2021-12-19 14:59:40,837 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 561 transitions. Word has length 17 [2021-12-19 14:59:40,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:40,837 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 561 transitions. [2021-12-19 14:59:40,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:40,837 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 561 transitions. [2021-12-19 14:59:40,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-19 14:59:40,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:40,838 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:40,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:41,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-19 14:59:41,062 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:41,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:41,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2021-12-19 14:59:41,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:41,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254003826] [2021-12-19 14:59:41,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:41,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:41,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 14:59:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-19 14:59:41,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:41,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254003826] [2021-12-19 14:59:41,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254003826] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:41,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638389654] [2021-12-19 14:59:41,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:41,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:41,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:41,124 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:59:41,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-19 14:59:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:41,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-19 14:59:41,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:41,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-19 14:59:41,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-19 14:59:41,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638389654] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:41,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:41,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2021-12-19 14:59:41,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575360852] [2021-12-19 14:59:41,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:41,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-19 14:59:41,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:41,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-19 14:59:41,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-12-19 14:59:41,440 INFO L87 Difference]: Start difference. First operand 445 states and 561 transitions. Second operand has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-19 14:59:42,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:42,054 INFO L93 Difference]: Finished difference Result 1122 states and 1582 transitions. [2021-12-19 14:59:42,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-19 14:59:42,055 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2021-12-19 14:59:42,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:42,060 INFO L225 Difference]: With dead ends: 1122 [2021-12-19 14:59:42,060 INFO L226 Difference]: Without dead ends: 781 [2021-12-19 14:59:42,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2021-12-19 14:59:42,064 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 282 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:42,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 98 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-19 14:59:42,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-12-19 14:59:42,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 585. [2021-12-19 14:59:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 455 states have (on average 1.2175824175824175) internal successors, (554), 475 states have internal predecessors, (554), 86 states have call successors, (86), 36 states have call predecessors, (86), 38 states have return successors, (90), 73 states have call predecessors, (90), 66 states have call successors, (90) [2021-12-19 14:59:42,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 730 transitions. [2021-12-19 14:59:42,098 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 730 transitions. Word has length 24 [2021-12-19 14:59:42,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:42,098 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 730 transitions. [2021-12-19 14:59:42,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-19 14:59:42,098 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 730 transitions. [2021-12-19 14:59:42,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-19 14:59:42,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:42,100 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:42,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:42,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:42,324 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:42,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:42,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1403347671, now seen corresponding path program 1 times [2021-12-19 14:59:42,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:42,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213822948] [2021-12-19 14:59:42,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:42,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:42,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:42,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213822948] [2021-12-19 14:59:42,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213822948] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:42,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908898315] [2021-12-19 14:59:42,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:42,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:42,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:42,387 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:59:42,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-19 14:59:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:42,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-19 14:59:42,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:42,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:42,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908898315] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:42,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:42,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-12-19 14:59:42,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371650631] [2021-12-19 14:59:42,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:42,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-19 14:59:42,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:42,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-19 14:59:42,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-12-19 14:59:42,598 INFO L87 Difference]: Start difference. First operand 585 states and 730 transitions. Second operand has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 10 states have internal predecessors, (47), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:42,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:42,884 INFO L93 Difference]: Finished difference Result 1053 states and 1343 transitions. [2021-12-19 14:59:42,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-19 14:59:42,885 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 10 states have internal predecessors, (47), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-19 14:59:42,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:42,890 INFO L225 Difference]: With dead ends: 1053 [2021-12-19 14:59:42,890 INFO L226 Difference]: Without dead ends: 1052 [2021-12-19 14:59:42,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2021-12-19 14:59:42,893 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 309 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:42,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 249 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:59:42,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-12-19 14:59:42,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 901. [2021-12-19 14:59:42,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 703 states have (on average 1.1806543385490753) internal successors, (830), 735 states have internal predecessors, (830), 130 states have call successors, (130), 56 states have call predecessors, (130), 62 states have return successors, (138), 109 states have call predecessors, (138), 102 states have call successors, (138) [2021-12-19 14:59:42,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1098 transitions. [2021-12-19 14:59:42,945 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1098 transitions. Word has length 28 [2021-12-19 14:59:42,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:42,947 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 1098 transitions. [2021-12-19 14:59:42,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 10 states have internal predecessors, (47), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:42,947 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1098 transitions. [2021-12-19 14:59:42,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-19 14:59:42,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:42,951 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:42,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:43,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:43,167 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:43,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:43,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1583952330, now seen corresponding path program 1 times [2021-12-19 14:59:43,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:43,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509838407] [2021-12-19 14:59:43,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:43,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:43,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 14:59:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-19 14:59:43,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:43,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509838407] [2021-12-19 14:59:43,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509838407] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:43,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84866736] [2021-12-19 14:59:43,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:43,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:43,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:43,256 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:59:43,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-19 14:59:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:43,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-19 14:59:43,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-19 14:59:43,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-19 14:59:43,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84866736] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:43,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:43,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-12-19 14:59:43,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129336037] [2021-12-19 14:59:43,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:43,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-19 14:59:43,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:43,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-19 14:59:43,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-19 14:59:43,489 INFO L87 Difference]: Start difference. First operand 901 states and 1098 transitions. Second operand has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-19 14:59:43,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:43,691 INFO L93 Difference]: Finished difference Result 1027 states and 1299 transitions. [2021-12-19 14:59:43,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-19 14:59:43,691 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-12-19 14:59:43,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:43,696 INFO L225 Difference]: With dead ends: 1027 [2021-12-19 14:59:43,696 INFO L226 Difference]: Without dead ends: 1026 [2021-12-19 14:59:43,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-12-19 14:59:43,697 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 119 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:43,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 126 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:59:43,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-12-19 14:59:43,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 943. [2021-12-19 14:59:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 740 states have (on average 1.1824324324324325) internal successors, (875), 768 states have internal predecessors, (875), 135 states have call successors, (135), 61 states have call predecessors, (135), 62 states have return successors, (138), 113 states have call predecessors, (138), 102 states have call successors, (138) [2021-12-19 14:59:43,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1148 transitions. [2021-12-19 14:59:43,759 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1148 transitions. Word has length 28 [2021-12-19 14:59:43,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:43,760 INFO L470 AbstractCegarLoop]: Abstraction has 943 states and 1148 transitions. [2021-12-19 14:59:43,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-19 14:59:43,760 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1148 transitions. [2021-12-19 14:59:43,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-19 14:59:43,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:43,763 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:43,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:43,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-19 14:59:43,979 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:43,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:43,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1777813581, now seen corresponding path program 1 times [2021-12-19 14:59:43,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:43,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273121080] [2021-12-19 14:59:43,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:43,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:44,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 14:59:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:44,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:44,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:44,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:44,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273121080] [2021-12-19 14:59:44,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273121080] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:44,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129870693] [2021-12-19 14:59:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:44,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:44,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:44,066 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:59:44,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-19 14:59:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:44,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-19 14:59:44,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:44,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:44,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129870693] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:44,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:44,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-12-19 14:59:44,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381725245] [2021-12-19 14:59:44,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:44,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-19 14:59:44,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:44,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-19 14:59:44,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-19 14:59:44,389 INFO L87 Difference]: Start difference. First operand 943 states and 1148 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-19 14:59:44,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:44,907 INFO L93 Difference]: Finished difference Result 1435 states and 2099 transitions. [2021-12-19 14:59:44,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-19 14:59:44,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-12-19 14:59:44,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:44,915 INFO L225 Difference]: With dead ends: 1435 [2021-12-19 14:59:44,915 INFO L226 Difference]: Without dead ends: 1433 [2021-12-19 14:59:44,916 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 [2021-12-19 14:59:44,917 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 143 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:44,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 208 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-19 14:59:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2021-12-19 14:59:44,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1237. [2021-12-19 14:59:44,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 932 states have (on average 1.1727467811158798) internal successors, (1093), 971 states have internal predecessors, (1093), 192 states have call successors, (192), 68 states have call predecessors, (192), 107 states have return successors, (366), 197 states have call predecessors, (366), 158 states have call successors, (366) [2021-12-19 14:59:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1651 transitions. [2021-12-19 14:59:44,989 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1651 transitions. Word has length 33 [2021-12-19 14:59:44,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:44,990 INFO L470 AbstractCegarLoop]: Abstraction has 1237 states and 1651 transitions. [2021-12-19 14:59:44,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-19 14:59:44,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1651 transitions. [2021-12-19 14:59:44,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-19 14:59:44,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:44,991 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:45,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:45,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:45,212 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:45,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:45,213 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2021-12-19 14:59:45,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:45,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277760445] [2021-12-19 14:59:45,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:45,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:45,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 14:59:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:45,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:45,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:45,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277760445] [2021-12-19 14:59:45,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277760445] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:45,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313379755] [2021-12-19 14:59:45,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:45,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:45,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:45,292 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:59:45,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-19 14:59:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:45,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-19 14:59:45,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:45,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:45,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313379755] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:45,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-19 14:59:45,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2021-12-19 14:59:45,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459005901] [2021-12-19 14:59:45,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:59:45,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-19 14:59:45,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:45,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-19 14:59:45,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-12-19 14:59:45,599 INFO L87 Difference]: Start difference. First operand 1237 states and 1651 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-19 14:59:45,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:45,797 INFO L93 Difference]: Finished difference Result 1303 states and 1719 transitions. [2021-12-19 14:59:45,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-19 14:59:45,798 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2021-12-19 14:59:45,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:45,805 INFO L225 Difference]: With dead ends: 1303 [2021-12-19 14:59:45,806 INFO L226 Difference]: Without dead ends: 1302 [2021-12-19 14:59:45,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-12-19 14:59:45,807 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 45 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:45,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 125 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:59:45,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-12-19 14:59:45,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1236. [2021-12-19 14:59:45,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 932 states have (on average 1.1641630901287554) internal successors, (1085), 970 states have internal predecessors, (1085), 192 states have call successors, (192), 68 states have call predecessors, (192), 107 states have return successors, (366), 197 states have call predecessors, (366), 158 states have call successors, (366) [2021-12-19 14:59:45,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1643 transitions. [2021-12-19 14:59:45,870 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1643 transitions. Word has length 34 [2021-12-19 14:59:45,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:45,871 INFO L470 AbstractCegarLoop]: Abstraction has 1236 states and 1643 transitions. [2021-12-19 14:59:45,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-19 14:59:45,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1643 transitions. [2021-12-19 14:59:45,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-19 14:59:45,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:45,873 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:45,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:46,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:46,088 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:46,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:46,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1699542727, now seen corresponding path program 1 times [2021-12-19 14:59:46,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:46,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438315493] [2021-12-19 14:59:46,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:46,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:46,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 14:59:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:46,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:46,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:46,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438315493] [2021-12-19 14:59:46,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438315493] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:46,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940981802] [2021-12-19 14:59:46,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:46,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:46,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:46,165 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:59:46,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-19 14:59:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:46,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-19 14:59:46,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:46,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:46,487 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:46,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940981802] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:46,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-19 14:59:46,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2021-12-19 14:59:46,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540899218] [2021-12-19 14:59:46,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:59:46,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-19 14:59:46,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:46,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-19 14:59:46,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-12-19 14:59:46,489 INFO L87 Difference]: Start difference. First operand 1236 states and 1643 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-19 14:59:46,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:46,723 INFO L93 Difference]: Finished difference Result 1343 states and 1866 transitions. [2021-12-19 14:59:46,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-19 14:59:46,724 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2021-12-19 14:59:46,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:46,730 INFO L225 Difference]: With dead ends: 1343 [2021-12-19 14:59:46,730 INFO L226 Difference]: Without dead ends: 1342 [2021-12-19 14:59:46,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-12-19 14:59:46,732 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 65 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:46,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 176 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:59:46,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-12-19 14:59:46,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1244. [2021-12-19 14:59:46,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 940 states have (on average 1.1595744680851063) internal successors, (1090), 974 states have internal predecessors, (1090), 196 states have call successors, (196), 68 states have call predecessors, (196), 103 states have return successors, (290), 201 states have call predecessors, (290), 162 states have call successors, (290) [2021-12-19 14:59:46,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1576 transitions. [2021-12-19 14:59:46,789 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1576 transitions. Word has length 37 [2021-12-19 14:59:46,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:46,790 INFO L470 AbstractCegarLoop]: Abstraction has 1244 states and 1576 transitions. [2021-12-19 14:59:46,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-19 14:59:46,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1576 transitions. [2021-12-19 14:59:46,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-19 14:59:46,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:46,791 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:46,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:47,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-19 14:59:47,011 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:47,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:47,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1975915362, now seen corresponding path program 2 times [2021-12-19 14:59:47,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:47,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018945349] [2021-12-19 14:59:47,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:47,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:47,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-19 14:59:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-19 14:59:47,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:47,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018945349] [2021-12-19 14:59:47,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018945349] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:47,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724580284] [2021-12-19 14:59:47,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 14:59:47,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:47,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:47,103 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:59:47,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-19 14:59:47,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 14:59:47,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 14:59:47,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-19 14:59:47,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:47,251 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-19 14:59:47,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-19 14:59:47,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724580284] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:47,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:47,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2021-12-19 14:59:47,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501861714] [2021-12-19 14:59:47,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:47,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-19 14:59:47,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:47,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-19 14:59:47,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-12-19 14:59:47,496 INFO L87 Difference]: Start difference. First operand 1244 states and 1576 transitions. Second operand has 23 states, 20 states have (on average 3.15) internal successors, (63), 17 states have internal predecessors, (63), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-19 14:59:48,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:48,037 INFO L93 Difference]: Finished difference Result 1537 states and 1982 transitions. [2021-12-19 14:59:48,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-19 14:59:48,038 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.15) internal successors, (63), 17 states have internal predecessors, (63), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-19 14:59:48,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:48,044 INFO L225 Difference]: With dead ends: 1537 [2021-12-19 14:59:48,044 INFO L226 Difference]: Without dead ends: 1536 [2021-12-19 14:59:48,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=420, Invalid=1302, Unknown=0, NotChecked=0, Total=1722 [2021-12-19 14:59:48,046 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 333 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:48,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 202 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-19 14:59:48,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-12-19 14:59:48,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1281. [2021-12-19 14:59:48,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 970 states have (on average 1.1597938144329898) internal successors, (1125), 1003 states have internal predecessors, (1125), 203 states have call successors, (203), 72 states have call predecessors, (203), 103 states have return successors, (290), 205 states have call predecessors, (290), 162 states have call successors, (290) [2021-12-19 14:59:48,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1618 transitions. [2021-12-19 14:59:48,112 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1618 transitions. Word has length 44 [2021-12-19 14:59:48,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:48,112 INFO L470 AbstractCegarLoop]: Abstraction has 1281 states and 1618 transitions. [2021-12-19 14:59:48,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.15) internal successors, (63), 17 states have internal predecessors, (63), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-19 14:59:48,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1618 transitions. [2021-12-19 14:59:48,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-19 14:59:48,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:48,114 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:48,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:48,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-19 14:59:48,327 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:48,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:48,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1560392739, now seen corresponding path program 2 times [2021-12-19 14:59:48,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:48,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653963389] [2021-12-19 14:59:48,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:48,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:48,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 14:59:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:48,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:48,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:48,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653963389] [2021-12-19 14:59:48,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653963389] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:48,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456069003] [2021-12-19 14:59:48,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 14:59:48,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:48,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:48,424 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:59:48,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-19 14:59:48,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 14:59:48,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 14:59:48,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-19 14:59:48,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:48,559 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:48,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 14:59:48,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456069003] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:48,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:48,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2021-12-19 14:59:48,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118459181] [2021-12-19 14:59:48,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:48,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-19 14:59:48,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:48,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-19 14:59:48,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-12-19 14:59:48,820 INFO L87 Difference]: Start difference. First operand 1281 states and 1618 transitions. Second operand has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-19 14:59:49,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:49,901 INFO L93 Difference]: Finished difference Result 2805 states and 4077 transitions. [2021-12-19 14:59:49,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-19 14:59:49,902 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 45 [2021-12-19 14:59:49,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:49,911 INFO L225 Difference]: With dead ends: 2805 [2021-12-19 14:59:49,912 INFO L226 Difference]: Without dead ends: 1937 [2021-12-19 14:59:49,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=586, Invalid=1964, Unknown=0, NotChecked=0, Total=2550 [2021-12-19 14:59:49,919 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 225 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:49,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 304 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-19 14:59:49,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-12-19 14:59:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1461. [2021-12-19 14:59:50,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1108 states have (on average 1.1498194945848375) internal successors, (1274), 1147 states have internal predecessors, (1274), 227 states have call successors, (227), 86 states have call predecessors, (227), 121 states have return successors, (328), 227 states have call predecessors, (328), 181 states have call successors, (328) [2021-12-19 14:59:50,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 1829 transitions. [2021-12-19 14:59:50,014 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 1829 transitions. Word has length 45 [2021-12-19 14:59:50,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:50,014 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 1829 transitions. [2021-12-19 14:59:50,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-19 14:59:50,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 1829 transitions. [2021-12-19 14:59:50,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-19 14:59:50,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:50,017 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:50,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:50,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-19 14:59:50,230 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:50,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:50,230 INFO L85 PathProgramCache]: Analyzing trace with hash -242379077, now seen corresponding path program 1 times [2021-12-19 14:59:50,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:50,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806749029] [2021-12-19 14:59:50,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:50,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:50,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-19 14:59:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-19 14:59:50,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:50,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806749029] [2021-12-19 14:59:50,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806749029] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:50,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412344061] [2021-12-19 14:59:50,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:50,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:50,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:50,298 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:59:50,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-19 14:59:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:50,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-19 14:59:50,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-19 14:59:50,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-19 14:59:50,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412344061] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:50,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:50,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2021-12-19 14:59:50,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80722214] [2021-12-19 14:59:50,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:50,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-19 14:59:50,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:50,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-19 14:59:50,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-12-19 14:59:50,594 INFO L87 Difference]: Start difference. First operand 1461 states and 1829 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-19 14:59:51,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:51,191 INFO L93 Difference]: Finished difference Result 1895 states and 2483 transitions. [2021-12-19 14:59:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-19 14:59:51,191 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2021-12-19 14:59:51,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:51,200 INFO L225 Difference]: With dead ends: 1895 [2021-12-19 14:59:51,200 INFO L226 Difference]: Without dead ends: 1824 [2021-12-19 14:59:51,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2021-12-19 14:59:51,202 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 198 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:51,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 75 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-19 14:59:51,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-12-19 14:59:51,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1397. [2021-12-19 14:59:51,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1056 states have (on average 1.1410984848484849) internal successors, (1205), 1099 states have internal predecessors, (1205), 216 states have call successors, (216), 79 states have call predecessors, (216), 121 states have return successors, (328), 218 states have call predecessors, (328), 181 states have call successors, (328) [2021-12-19 14:59:51,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 1749 transitions. [2021-12-19 14:59:51,281 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 1749 transitions. Word has length 52 [2021-12-19 14:59:51,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:51,281 INFO L470 AbstractCegarLoop]: Abstraction has 1397 states and 1749 transitions. [2021-12-19 14:59:51,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-19 14:59:51,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 1749 transitions. [2021-12-19 14:59:51,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-19 14:59:51,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:51,284 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:51,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:51,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-19 14:59:51,499 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:51,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:51,500 INFO L85 PathProgramCache]: Analyzing trace with hash 442862615, now seen corresponding path program 1 times [2021-12-19 14:59:51,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:51,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635772680] [2021-12-19 14:59:51,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:51,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:51,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 14:59:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:51,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 14:59:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:51,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:51,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 14:59:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-19 14:59:51,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:51,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635772680] [2021-12-19 14:59:51,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635772680] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:51,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870230885] [2021-12-19 14:59:51,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:51,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:51,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:51,627 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:59:51,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-19 14:59:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:51,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-19 14:59:51,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:51,777 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-19 14:59:51,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-19 14:59:52,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870230885] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:52,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:52,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2021-12-19 14:59:52,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353304721] [2021-12-19 14:59:52,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:52,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-19 14:59:52,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:52,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-19 14:59:52,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-12-19 14:59:52,216 INFO L87 Difference]: Start difference. First operand 1397 states and 1749 transitions. Second operand has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-19 14:59:53,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:53,564 INFO L93 Difference]: Finished difference Result 3379 states and 6003 transitions. [2021-12-19 14:59:53,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-19 14:59:53,565 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 52 [2021-12-19 14:59:53,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:53,587 INFO L225 Difference]: With dead ends: 3379 [2021-12-19 14:59:53,588 INFO L226 Difference]: Without dead ends: 3377 [2021-12-19 14:59:53,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1158, Invalid=5004, Unknown=0, NotChecked=0, Total=6162 [2021-12-19 14:59:53,593 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 171 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:53,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 238 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-19 14:59:53,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3377 states. [2021-12-19 14:59:53,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3377 to 2467. [2021-12-19 14:59:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2467 states, 1731 states have (on average 1.1103408434430966) internal successors, (1922), 1777 states have internal predecessors, (1922), 433 states have call successors, (433), 93 states have call predecessors, (433), 299 states have return successors, (2469), 596 states have call predecessors, (2469), 396 states have call successors, (2469) [2021-12-19 14:59:53,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 4824 transitions. [2021-12-19 14:59:53,793 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 4824 transitions. Word has length 52 [2021-12-19 14:59:53,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:53,793 INFO L470 AbstractCegarLoop]: Abstraction has 2467 states and 4824 transitions. [2021-12-19 14:59:53,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-19 14:59:53,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 4824 transitions. [2021-12-19 14:59:53,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-19 14:59:53,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:53,796 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:53,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:54,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-19 14:59:54,013 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:54,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:54,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1991697283, now seen corresponding path program 1 times [2021-12-19 14:59:54,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:54,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832778766] [2021-12-19 14:59:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:54,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-19 14:59:54,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:54,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832778766] [2021-12-19 14:59:54,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832778766] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:54,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402646999] [2021-12-19 14:59:54,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:54,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:54,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:54,105 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:59:54,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-19 14:59:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:54,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-19 14:59:54,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-19 14:59:54,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-19 14:59:54,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402646999] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:54,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:54,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-12-19 14:59:54,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308829991] [2021-12-19 14:59:54,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:54,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-19 14:59:54,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:54,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-19 14:59:54,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-12-19 14:59:54,468 INFO L87 Difference]: Start difference. First operand 2467 states and 4824 transitions. Second operand has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:55,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:55,236 INFO L93 Difference]: Finished difference Result 7309 states and 13959 transitions. [2021-12-19 14:59:55,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-19 14:59:55,236 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-19 14:59:55,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:55,287 INFO L225 Difference]: With dead ends: 7309 [2021-12-19 14:59:55,287 INFO L226 Difference]: Without dead ends: 7308 [2021-12-19 14:59:55,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2021-12-19 14:59:55,293 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 875 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:55,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 341 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-19 14:59:55,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7308 states. [2021-12-19 14:59:55,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7308 to 6715. [2021-12-19 14:59:55,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6715 states, 4743 states have (on average 1.1123761332489985) internal successors, (5276), 4849 states have internal predecessors, (5276), 1177 states have call successors, (1177), 273 states have call predecessors, (1177), 791 states have return successors, (6567), 1592 states have call predecessors, (6567), 1050 states have call successors, (6567) [2021-12-19 14:59:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6715 states to 6715 states and 13020 transitions. [2021-12-19 14:59:55,842 INFO L78 Accepts]: Start accepts. Automaton has 6715 states and 13020 transitions. Word has length 58 [2021-12-19 14:59:55,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:55,842 INFO L470 AbstractCegarLoop]: Abstraction has 6715 states and 13020 transitions. [2021-12-19 14:59:55,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:55,843 INFO L276 IsEmpty]: Start isEmpty. Operand 6715 states and 13020 transitions. [2021-12-19 14:59:55,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-19 14:59:55,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:55,845 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:55,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-19 14:59:56,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-19 14:59:56,046 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:56,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:56,046 INFO L85 PathProgramCache]: Analyzing trace with hash 526800899, now seen corresponding path program 1 times [2021-12-19 14:59:56,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:56,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290677856] [2021-12-19 14:59:56,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:56,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:56,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 14:59:56,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:56,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 14:59:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:56,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 14:59:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:56,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 14:59:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-19 14:59:56,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:56,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290677856] [2021-12-19 14:59:56,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290677856] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:56,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864667565] [2021-12-19 14:59:56,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:56,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:56,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:56,191 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:59:56,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-19 14:59:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:56,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-19 14:59:56,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:56,333 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-19 14:59:56,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-19 14:59:56,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864667565] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:56,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:56,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2021-12-19 14:59:56,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927466089] [2021-12-19 14:59:56,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:56,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-19 14:59:56,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:56,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-19 14:59:56,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-12-19 14:59:56,742 INFO L87 Difference]: Start difference. First operand 6715 states and 13020 transitions. Second operand has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-19 14:59:59,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:59,076 INFO L93 Difference]: Finished difference Result 26411 states and 94719 transitions. [2021-12-19 14:59:59,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-19 14:59:59,076 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2021-12-19 14:59:59,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:59,408 INFO L225 Difference]: With dead ends: 26411 [2021-12-19 14:59:59,409 INFO L226 Difference]: Without dead ends: 20152 [2021-12-19 14:59:59,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1251, Invalid=4755, Unknown=0, NotChecked=0, Total=6006 [2021-12-19 14:59:59,551 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 159 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:59,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 296 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-19 14:59:59,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20152 states. [2021-12-19 15:00:01,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20152 to 14221. [2021-12-19 15:00:01,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14221 states, 9461 states have (on average 1.0752563154000634) internal successors, (10173), 9539 states have internal predecessors, (10173), 2706 states have call successors, (2706), 364 states have call predecessors, (2706), 2050 states have return successors, (36260), 4317 states have call predecessors, (36260), 2553 states have call successors, (36260) [2021-12-19 15:00:01,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14221 states to 14221 states and 49139 transitions. [2021-12-19 15:00:01,838 INFO L78 Accepts]: Start accepts. Automaton has 14221 states and 49139 transitions. Word has length 56 [2021-12-19 15:00:01,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:01,838 INFO L470 AbstractCegarLoop]: Abstraction has 14221 states and 49139 transitions. [2021-12-19 15:00:01,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-19 15:00:01,839 INFO L276 IsEmpty]: Start isEmpty. Operand 14221 states and 49139 transitions. [2021-12-19 15:00:01,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-19 15:00:01,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:01,842 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:01,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-19 15:00:02,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:02,055 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:02,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:02,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1996075823, now seen corresponding path program 2 times [2021-12-19 15:00:02,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:02,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37747381] [2021-12-19 15:00:02,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:02,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:02,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 15:00:02,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:02,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37747381] [2021-12-19 15:00:02,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37747381] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:02,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993878953] [2021-12-19 15:00:02,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 15:00:02,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:02,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:02,304 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 15:00:02,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-19 15:00:02,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 15:00:02,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 15:00:02,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-19 15:00:02,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:02,443 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 15:00:02,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 15:00:02,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993878953] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:02,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:02,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2021-12-19 15:00:02,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607211232] [2021-12-19 15:00:02,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:02,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-19 15:00:02,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:02,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-19 15:00:02,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2021-12-19 15:00:02,698 INFO L87 Difference]: Start difference. First operand 14221 states and 49139 transitions. Second operand has 32 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 18 states have internal predecessors, (103), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 15:00:04,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:04,283 INFO L93 Difference]: Finished difference Result 22021 states and 73282 transitions. [2021-12-19 15:00:04,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-19 15:00:04,284 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 18 states have internal predecessors, (103), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-19 15:00:04,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:04,629 INFO L225 Difference]: With dead ends: 22021 [2021-12-19 15:00:04,629 INFO L226 Difference]: Without dead ends: 22020 [2021-12-19 15:00:04,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1054, Invalid=2368, Unknown=0, NotChecked=0, Total=3422 [2021-12-19 15:00:04,646 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 772 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:04,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 626 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-19 15:00:04,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22020 states. [2021-12-19 15:00:06,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22020 to 20851. [2021-12-19 15:00:06,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20851 states, 13848 states have (on average 1.0675909878682843) internal successors, (14784), 14025 states have internal predecessors, (14784), 3890 states have call successors, (3890), 508 states have call predecessors, (3890), 3109 states have return successors, (51912), 6317 states have call predecessors, (51912), 3673 states have call successors, (51912) [2021-12-19 15:00:07,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20851 states to 20851 states and 70586 transitions. [2021-12-19 15:00:07,282 INFO L78 Accepts]: Start accepts. Automaton has 20851 states and 70586 transitions. Word has length 60 [2021-12-19 15:00:07,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:07,283 INFO L470 AbstractCegarLoop]: Abstraction has 20851 states and 70586 transitions. [2021-12-19 15:00:07,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 18 states have internal predecessors, (103), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 15:00:07,283 INFO L276 IsEmpty]: Start isEmpty. Operand 20851 states and 70586 transitions. [2021-12-19 15:00:07,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-19 15:00:07,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:07,286 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:07,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:07,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:07,495 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:07,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:07,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1312915314, now seen corresponding path program 3 times [2021-12-19 15:00:07,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:07,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201048939] [2021-12-19 15:00:07,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:07,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:07,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:07,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-19 15:00:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 3 proven. 116 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-19 15:00:07,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:07,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201048939] [2021-12-19 15:00:07,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201048939] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:07,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852342608] [2021-12-19 15:00:07,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-19 15:00:07,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:07,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:07,620 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 15:00:07,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-19 15:00:07,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-19 15:00:07,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 15:00:07,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-19 15:00:07,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-19 15:00:07,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-19 15:00:07,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852342608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 15:00:07,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-19 15:00:07,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 19 [2021-12-19 15:00:07,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75475168] [2021-12-19 15:00:07,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 15:00:07,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-19 15:00:07,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:07,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-19 15:00:07,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-12-19 15:00:07,754 INFO L87 Difference]: Start difference. First operand 20851 states and 70586 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 15:00:08,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:08,667 INFO L93 Difference]: Finished difference Result 20934 states and 72002 transitions. [2021-12-19 15:00:08,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-19 15:00:08,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-12-19 15:00:08,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:08,985 INFO L225 Difference]: With dead ends: 20934 [2021-12-19 15:00:08,985 INFO L226 Difference]: Without dead ends: 18654 [2021-12-19 15:00:09,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-12-19 15:00:09,015 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:09,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 50 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-19 15:00:09,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18654 states. [2021-12-19 15:00:10,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18654 to 18557. [2021-12-19 15:00:10,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18557 states, 11972 states have (on average 1.0447711326428333) internal successors, (12508), 11966 states have internal predecessors, (12508), 3684 states have call successors, (3684), 332 states have call predecessors, (3684), 2897 states have return successors, (51628), 6258 states have call predecessors, (51628), 3673 states have call successors, (51628) [2021-12-19 15:00:10,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18557 states to 18557 states and 67820 transitions. [2021-12-19 15:00:10,826 INFO L78 Accepts]: Start accepts. Automaton has 18557 states and 67820 transitions. Word has length 60 [2021-12-19 15:00:10,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:10,827 INFO L470 AbstractCegarLoop]: Abstraction has 18557 states and 67820 transitions. [2021-12-19 15:00:10,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 15:00:10,827 INFO L276 IsEmpty]: Start isEmpty. Operand 18557 states and 67820 transitions. [2021-12-19 15:00:10,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-19 15:00:10,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:10,833 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] [2021-12-19 15:00:10,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:11,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:11,055 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:11,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:11,056 INFO L85 PathProgramCache]: Analyzing trace with hash 55857866, now seen corresponding path program 2 times [2021-12-19 15:00:11,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:11,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047846193] [2021-12-19 15:00:11,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:11,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:11,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 15:00:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:11,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:11,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:00:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:11,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:11,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 15:00:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-19 15:00:11,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:11,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047846193] [2021-12-19 15:00:11,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047846193] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:11,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962070142] [2021-12-19 15:00:11,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 15:00:11,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:11,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:11,238 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 15:00:11,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-19 15:00:11,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 15:00:11,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 15:00:11,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-19 15:00:11,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 23 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-19 15:00:11,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 80 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-19 15:00:12,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962070142] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:12,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:12,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2021-12-19 15:00:12,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74357281] [2021-12-19 15:00:12,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:12,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-19 15:00:12,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:12,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-19 15:00:12,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-12-19 15:00:12,174 INFO L87 Difference]: Start difference. First operand 18557 states and 67820 transitions. Second operand has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-19 15:00:13,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:13,885 INFO L93 Difference]: Finished difference Result 29009 states and 107470 transitions. [2021-12-19 15:00:13,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-19 15:00:13,886 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 [2021-12-19 15:00:13,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:13,963 INFO L225 Difference]: With dead ends: 29009 [2021-12-19 15:00:13,963 INFO L226 Difference]: Without dead ends: 10982 [2021-12-19 15:00:14,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=673, Invalid=2633, Unknown=0, NotChecked=0, Total=3306 [2021-12-19 15:00:14,223 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 159 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:14,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 307 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-19 15:00:14,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10982 states. [2021-12-19 15:00:14,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10982 to 10399. [2021-12-19 15:00:14,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10399 states, 7045 states have (on average 1.0679914833215045) internal successors, (7524), 7211 states have internal predecessors, (7524), 2051 states have call successors, (2051), 356 states have call predecessors, (2051), 1299 states have return successors, (6727), 2831 states have call predecessors, (6727), 2043 states have call successors, (6727) [2021-12-19 15:00:14,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10399 states to 10399 states and 16302 transitions. [2021-12-19 15:00:14,882 INFO L78 Accepts]: Start accepts. Automaton has 10399 states and 16302 transitions. Word has length 73 [2021-12-19 15:00:14,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:14,883 INFO L470 AbstractCegarLoop]: Abstraction has 10399 states and 16302 transitions. [2021-12-19 15:00:14,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-19 15:00:14,883 INFO L276 IsEmpty]: Start isEmpty. Operand 10399 states and 16302 transitions. [2021-12-19 15:00:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-19 15:00:14,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:14,888 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:14,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:15,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:15,104 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:15,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:15,104 INFO L85 PathProgramCache]: Analyzing trace with hash -131434271, now seen corresponding path program 3 times [2021-12-19 15:00:15,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:15,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532649395] [2021-12-19 15:00:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:15,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:15,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:15,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 15:00:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:15,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:15,253 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 15:00:15,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:15,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532649395] [2021-12-19 15:00:15,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532649395] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:15,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694990934] [2021-12-19 15:00:15,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-19 15:00:15,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:15,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:15,256 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 15:00:15,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-19 15:00:15,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-19 15:00:15,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 15:00:15,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-19 15:00:15,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 15:00:15,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 65 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 15:00:15,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694990934] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:15,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:15,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2021-12-19 15:00:15,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868092137] [2021-12-19 15:00:15,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:15,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-19 15:00:15,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:15,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-19 15:00:15,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-12-19 15:00:15,876 INFO L87 Difference]: Start difference. First operand 10399 states and 16302 transitions. Second operand has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-19 15:00:16,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:16,743 INFO L93 Difference]: Finished difference Result 11154 states and 17444 transitions. [2021-12-19 15:00:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-19 15:00:16,744 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2021-12-19 15:00:16,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:16,782 INFO L225 Difference]: With dead ends: 11154 [2021-12-19 15:00:16,783 INFO L226 Difference]: Without dead ends: 11153 [2021-12-19 15:00:16,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=577, Invalid=1973, Unknown=0, NotChecked=0, Total=2550 [2021-12-19 15:00:16,790 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 209 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:16,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 224 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-19 15:00:16,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11153 states. [2021-12-19 15:00:17,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11153 to 10507. [2021-12-19 15:00:17,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10507 states, 7117 states have (on average 1.0647744836307433) internal successors, (7578), 7283 states have internal predecessors, (7578), 2051 states have call successors, (2051), 356 states have call predecessors, (2051), 1335 states have return successors, (6821), 2867 states have call predecessors, (6821), 2043 states have call successors, (6821) [2021-12-19 15:00:17,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10507 states to 10507 states and 16450 transitions. [2021-12-19 15:00:17,330 INFO L78 Accepts]: Start accepts. Automaton has 10507 states and 16450 transitions. Word has length 69 [2021-12-19 15:00:17,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:17,330 INFO L470 AbstractCegarLoop]: Abstraction has 10507 states and 16450 transitions. [2021-12-19 15:00:17,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-19 15:00:17,331 INFO L276 IsEmpty]: Start isEmpty. Operand 10507 states and 16450 transitions. [2021-12-19 15:00:17,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-19 15:00:17,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:17,334 INFO L514 BasicCegarLoop]: trace histogram [10, 7, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:17,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:17,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:17,558 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:17,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:17,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1597804450, now seen corresponding path program 2 times [2021-12-19 15:00:17,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:17,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193706068] [2021-12-19 15:00:17,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:17,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:17,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-19 15:00:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:17,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:17,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:00:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:17,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:00:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:17,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:17,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 15:00:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:17,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-19 15:00:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-19 15:00:17,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:17,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193706068] [2021-12-19 15:00:17,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193706068] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:17,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62354414] [2021-12-19 15:00:17,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 15:00:17,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:17,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:17,675 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 15:00:17,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-19 15:00:17,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 15:00:17,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 15:00:17,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-19 15:00:17,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 100 proven. 15 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-19 15:00:17,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 100 proven. 26 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-19 15:00:18,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62354414] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:18,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:18,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2021-12-19 15:00:18,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716252870] [2021-12-19 15:00:18,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:18,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-19 15:00:18,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:18,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-19 15:00:18,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-19 15:00:18,288 INFO L87 Difference]: Start difference. First operand 10507 states and 16450 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-19 15:00:18,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:18,827 INFO L93 Difference]: Finished difference Result 21303 states and 37540 transitions. [2021-12-19 15:00:18,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-19 15:00:18,828 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) Word has length 88 [2021-12-19 15:00:18,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:18,891 INFO L225 Difference]: With dead ends: 21303 [2021-12-19 15:00:18,891 INFO L226 Difference]: Without dead ends: 11691 [2021-12-19 15:00:18,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-12-19 15:00:18,959 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 54 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:18,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 81 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 15:00:18,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11691 states. [2021-12-19 15:00:19,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11691 to 10501. [2021-12-19 15:00:19,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10501 states, 7114 states have (on average 1.064801799269047) internal successors, (7575), 7280 states have internal predecessors, (7575), 2048 states have call successors, (2048), 356 states have call predecessors, (2048), 1335 states have return successors, (6741), 2864 states have call predecessors, (6741), 2013 states have call successors, (6741) [2021-12-19 15:00:19,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10501 states to 10501 states and 16364 transitions. [2021-12-19 15:00:19,582 INFO L78 Accepts]: Start accepts. Automaton has 10501 states and 16364 transitions. Word has length 88 [2021-12-19 15:00:19,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:19,583 INFO L470 AbstractCegarLoop]: Abstraction has 10501 states and 16364 transitions. [2021-12-19 15:00:19,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-19 15:00:19,583 INFO L276 IsEmpty]: Start isEmpty. Operand 10501 states and 16364 transitions. [2021-12-19 15:00:19,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-19 15:00:19,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:19,588 INFO L514 BasicCegarLoop]: trace histogram [11, 9, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:19,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:19,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:19,811 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:19,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:19,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1897499616, now seen corresponding path program 3 times [2021-12-19 15:00:19,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:19,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523518550] [2021-12-19 15:00:19,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:19,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:19,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 15:00:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:19,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:00:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:19,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:00:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:19,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:19,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:00:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:19,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:19,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 15:00:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:19,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-19 15:00:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:19,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-19 15:00:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:19,940 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 113 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-19 15:00:19,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:19,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523518550] [2021-12-19 15:00:19,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523518550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:19,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709109030] [2021-12-19 15:00:19,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-19 15:00:19,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:19,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:19,942 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 15:00:19,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-19 15:00:20,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-19 15:00:20,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 15:00:20,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-19 15:00:20,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 150 proven. 26 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-19 15:00:20,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 119 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-19 15:00:20,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709109030] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:20,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:20,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2021-12-19 15:00:20,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883394074] [2021-12-19 15:00:20,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:20,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-19 15:00:20,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:20,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-19 15:00:20,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-12-19 15:00:20,941 INFO L87 Difference]: Start difference. First operand 10501 states and 16364 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2021-12-19 15:00:21,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:21,611 INFO L93 Difference]: Finished difference Result 24332 states and 49250 transitions. [2021-12-19 15:00:21,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-19 15:00:21,611 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) Word has length 99 [2021-12-19 15:00:21,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:21,679 INFO L225 Difference]: With dead ends: 24332 [2021-12-19 15:00:21,680 INFO L226 Difference]: Without dead ends: 14755 [2021-12-19 15:00:21,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-12-19 15:00:21,742 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 92 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:21,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 132 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 15:00:21,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14755 states. [2021-12-19 15:00:22,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14755 to 14389. [2021-12-19 15:00:22,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14389 states, 9709 states have (on average 1.0530435678236687) internal successors, (10224), 9968 states have internal predecessors, (10224), 2881 states have call successors, (2881), 496 states have call predecessors, (2881), 1795 states have return successors, (9707), 3924 states have call predecessors, (9707), 2826 states have call successors, (9707) [2021-12-19 15:00:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14389 states to 14389 states and 22812 transitions. [2021-12-19 15:00:22,654 INFO L78 Accepts]: Start accepts. Automaton has 14389 states and 22812 transitions. Word has length 99 [2021-12-19 15:00:22,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:22,654 INFO L470 AbstractCegarLoop]: Abstraction has 14389 states and 22812 transitions. [2021-12-19 15:00:22,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2021-12-19 15:00:22,655 INFO L276 IsEmpty]: Start isEmpty. Operand 14389 states and 22812 transitions. [2021-12-19 15:00:22,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-19 15:00:22,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:22,661 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 7, 7, 7, 7, 6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:22,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:22,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-19 15:00:22,883 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:22,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:22,883 INFO L85 PathProgramCache]: Analyzing trace with hash -127918165, now seen corresponding path program 3 times [2021-12-19 15:00:22,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:22,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676134869] [2021-12-19 15:00:22,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:22,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:22,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:22,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 15:00:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:23,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:00:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:23,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:23,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 15:00:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 122 proven. 90 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-19 15:00:23,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:23,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676134869] [2021-12-19 15:00:23,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676134869] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:23,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953201568] [2021-12-19 15:00:23,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-19 15:00:23,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:23,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:23,132 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 15:00:23,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-19 15:00:23,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-19 15:00:23,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 15:00:23,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-19 15:00:23,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 119 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-19 15:00:23,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-19 15:00:23,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953201568] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:23,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:23,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2021-12-19 15:00:23,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112351835] [2021-12-19 15:00:23,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:23,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-19 15:00:23,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:23,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-19 15:00:23,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-12-19 15:00:23,649 INFO L87 Difference]: Start difference. First operand 14389 states and 22812 transitions. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-19 15:00:25,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:25,330 INFO L93 Difference]: Finished difference Result 25356 states and 43274 transitions. [2021-12-19 15:00:25,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-19 15:00:25,330 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 88 [2021-12-19 15:00:25,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:25,402 INFO L225 Difference]: With dead ends: 25356 [2021-12-19 15:00:25,402 INFO L226 Difference]: Without dead ends: 13111 [2021-12-19 15:00:25,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=989, Invalid=3433, Unknown=0, NotChecked=0, Total=4422 [2021-12-19 15:00:25,483 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 235 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:25,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 141 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 954 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-19 15:00:25,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13111 states. [2021-12-19 15:00:26,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13111 to 11133. [2021-12-19 15:00:26,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11133 states, 7576 states have (on average 1.046066525871172) internal successors, (7925), 7824 states have internal predecessors, (7925), 2175 states have call successors, (2175), 424 states have call predecessors, (2175), 1378 states have return successors, (5289), 2884 states have call predecessors, (5289), 2141 states have call successors, (5289) [2021-12-19 15:00:26,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11133 states to 11133 states and 15389 transitions. [2021-12-19 15:00:26,142 INFO L78 Accepts]: Start accepts. Automaton has 11133 states and 15389 transitions. Word has length 88 [2021-12-19 15:00:26,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:26,143 INFO L470 AbstractCegarLoop]: Abstraction has 11133 states and 15389 transitions. [2021-12-19 15:00:26,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-19 15:00:26,143 INFO L276 IsEmpty]: Start isEmpty. Operand 11133 states and 15389 transitions. [2021-12-19 15:00:26,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-19 15:00:26,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:26,146 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:26,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-19 15:00:26,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-19 15:00:26,347 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:26,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:26,347 INFO L85 PathProgramCache]: Analyzing trace with hash -635779733, now seen corresponding path program 4 times [2021-12-19 15:00:26,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:26,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883247238] [2021-12-19 15:00:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:26,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:26,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 15:00:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:26,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:00:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:26,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:00:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:26,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:00:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:26,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:26,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 15:00:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:26,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-19 15:00:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:26,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-19 15:00:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 51 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-19 15:00:26,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:26,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883247238] [2021-12-19 15:00:26,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883247238] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:26,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477287466] [2021-12-19 15:00:26,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-19 15:00:26,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:26,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:26,576 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 15:00:26,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-19 15:00:26,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-19 15:00:26,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 15:00:26,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-19 15:00:26,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 67 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-19 15:00:26,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 42 proven. 89 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-19 15:00:28,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477287466] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:28,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:28,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2021-12-19 15:00:28,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355451317] [2021-12-19 15:00:28,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:28,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-19 15:00:28,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:28,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-19 15:00:28,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-12-19 15:00:28,250 INFO L87 Difference]: Start difference. First operand 11133 states and 15389 transitions. Second operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2021-12-19 15:00:32,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:32,774 INFO L93 Difference]: Finished difference Result 34661 states and 55072 transitions. [2021-12-19 15:00:32,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-12-19 15:00:32,774 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) Word has length 90 [2021-12-19 15:00:32,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:32,929 INFO L225 Difference]: With dead ends: 34661 [2021-12-19 15:00:32,929 INFO L226 Difference]: Without dead ends: 33559 [2021-12-19 15:00:32,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12224 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5458, Invalid=27122, Unknown=0, NotChecked=0, Total=32580 [2021-12-19 15:00:32,949 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 260 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 1235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 2321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1235 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:32,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 282 Invalid, 2321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1235 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-19 15:00:32,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33559 states. [2021-12-19 15:00:34,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33559 to 21083. [2021-12-19 15:00:34,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21083 states, 13668 states have (on average 1.0274363476733976) internal successors, (14043), 13899 states have internal predecessors, (14043), 4366 states have call successors, (4366), 532 states have call predecessors, (4366), 3045 states have return successors, (14390), 6651 states have call predecessors, (14390), 4312 states have call successors, (14390) [2021-12-19 15:00:34,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21083 states to 21083 states and 32799 transitions. [2021-12-19 15:00:34,295 INFO L78 Accepts]: Start accepts. Automaton has 21083 states and 32799 transitions. Word has length 90 [2021-12-19 15:00:34,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:34,296 INFO L470 AbstractCegarLoop]: Abstraction has 21083 states and 32799 transitions. [2021-12-19 15:00:34,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2021-12-19 15:00:34,296 INFO L276 IsEmpty]: Start isEmpty. Operand 21083 states and 32799 transitions. [2021-12-19 15:00:34,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-19 15:00:34,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:34,301 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:34,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:34,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-19 15:00:34,502 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:34,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:34,502 INFO L85 PathProgramCache]: Analyzing trace with hash -165426143, now seen corresponding path program 3 times [2021-12-19 15:00:34,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:34,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185573235] [2021-12-19 15:00:34,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:34,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 15:00:34,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:34,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185573235] [2021-12-19 15:00:34,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185573235] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:34,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374226213] [2021-12-19 15:00:34,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-19 15:00:34,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:34,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:34,953 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 15:00:34,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-19 15:00:35,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-19 15:00:35,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 15:00:35,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-19 15:00:35,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 15:00:35,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 15:00:36,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374226213] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:36,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:36,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2021-12-19 15:00:36,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929969350] [2021-12-19 15:00:36,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:36,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-19 15:00:36,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:36,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-19 15:00:36,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=3036, Unknown=0, NotChecked=0, Total=4032 [2021-12-19 15:00:36,086 INFO L87 Difference]: Start difference. First operand 21083 states and 32799 transitions. Second operand has 64 states, 61 states have (on average 3.5245901639344264) internal successors, (215), 34 states have internal predecessors, (215), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 15:00:38,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:38,957 INFO L93 Difference]: Finished difference Result 36172 states and 56287 transitions. [2021-12-19 15:00:38,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-19 15:00:38,957 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 61 states have (on average 3.5245901639344264) internal successors, (215), 34 states have internal predecessors, (215), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-12-19 15:00:38,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:39,070 INFO L225 Difference]: With dead ends: 36172 [2021-12-19 15:00:39,070 INFO L226 Difference]: Without dead ends: 36171 [2021-12-19 15:00:39,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3484 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4654, Invalid=10352, Unknown=0, NotChecked=0, Total=15006 [2021-12-19 15:00:39,087 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1562 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 932 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1566 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 932 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:39,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1566 Valid, 825 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [932 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-19 15:00:39,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36171 states. [2021-12-19 15:00:40,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36171 to 36171. [2021-12-19 15:00:40,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36171 states, 23412 states have (on average 1.0283188108662225) internal successors, (24075), 23931 states have internal predecessors, (24075), 7326 states have call successors, (7326), 820 states have call predecessors, (7326), 5429 states have return successors, (24870), 11419 states have call predecessors, (24870), 7272 states have call successors, (24870) [2021-12-19 15:00:40,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36171 states to 36171 states and 56271 transitions. [2021-12-19 15:00:40,817 INFO L78 Accepts]: Start accepts. Automaton has 36171 states and 56271 transitions. Word has length 124 [2021-12-19 15:00:40,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:40,818 INFO L470 AbstractCegarLoop]: Abstraction has 36171 states and 56271 transitions. [2021-12-19 15:00:40,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 61 states have (on average 3.5245901639344264) internal successors, (215), 34 states have internal predecessors, (215), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 15:00:40,818 INFO L276 IsEmpty]: Start isEmpty. Operand 36171 states and 56271 transitions. [2021-12-19 15:00:40,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-19 15:00:40,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:40,826 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:40,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:41,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:41,049 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:41,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:41,049 INFO L85 PathProgramCache]: Analyzing trace with hash -570444405, now seen corresponding path program 2 times [2021-12-19 15:00:41,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:41,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876522120] [2021-12-19 15:00:41,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:41,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:41,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-19 15:00:41,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:41,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876522120] [2021-12-19 15:00:41,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876522120] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:41,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765964138] [2021-12-19 15:00:41,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 15:00:41,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:41,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:41,328 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 15:00:41,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-19 15:00:41,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 15:00:41,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 15:00:41,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-19 15:00:41,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-19 15:00:41,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-19 15:00:42,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765964138] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:42,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:42,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-12-19 15:00:42,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192209278] [2021-12-19 15:00:42,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:42,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-19 15:00:42,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:42,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-19 15:00:42,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2021-12-19 15:00:42,285 INFO L87 Difference]: Start difference. First operand 36171 states and 56271 transitions. Second operand has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 15:00:46,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:46,161 INFO L93 Difference]: Finished difference Result 81584 states and 127861 transitions. [2021-12-19 15:00:46,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-19 15:00:46,162 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-12-19 15:00:46,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:46,472 INFO L225 Difference]: With dead ends: 81584 [2021-12-19 15:00:46,472 INFO L226 Difference]: Without dead ends: 81583 [2021-12-19 15:00:46,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2021-12-19 15:00:46,515 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2499 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2502 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 900 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:46,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2502 Valid, 538 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [900 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-19 15:00:46,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81583 states.