./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-numeric/Ackermann01-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 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/termination-numeric/Ackermann01-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 380ed529f726f53285b49ce40e57404dbe066b029b8c3af7ce337366515780a5 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 09:01:46,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 09:01:46,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 09:01:46,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 09:01:46,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 09:01:46,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 09:01:46,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 09:01:46,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 09:01:46,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 09:01:46,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 09:01:46,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 09:01:46,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 09:01:46,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 09:01:46,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 09:01:46,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 09:01:46,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 09:01:46,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 09:01:46,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 09:01:46,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 09:01:46,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 09:01:46,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 09:01:46,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 09:01:46,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 09:01:46,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 09:01:46,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 09:01:46,236 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 09:01:46,237 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 09:01:46,238 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 09:01:46,238 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 09:01:46,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 09:01:46,239 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 09:01:46,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 09:01:46,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 09:01:46,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 09:01:46,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 09:01:46,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 09:01:46,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 09:01:46,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 09:01:46,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 09:01:46,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 09:01:46,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 09:01:46,246 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-12-16 09:01:46,266 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 09:01:46,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 09:01:46,269 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 09:01:46,269 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 09:01:46,270 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 09:01:46,270 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 09:01:46,271 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 09:01:46,271 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 09:01:46,271 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 09:01:46,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 09:01:46,272 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 09:01:46,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 09:01:46,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 09:01:46,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 09:01:46,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 09:01:46,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 09:01:46,273 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-16 09:01:46,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 09:01:46,273 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 09:01:46,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 09:01:46,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 09:01:46,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 09:01:46,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 09:01:46,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 09:01:46,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 09:01:46,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 09:01:46,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 09:01:46,275 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 09:01:46,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 09:01:46,275 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 09:01:46,275 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 09:01:46,276 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 380ed529f726f53285b49ce40e57404dbe066b029b8c3af7ce337366515780a5 [2021-12-16 09:01:46,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 09:01:46,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 09:01:46,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 09:01:46,481 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 09:01:46,483 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 09:01:46,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/Ackermann01-1.c [2021-12-16 09:01:46,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c67b52ff/8ce225e1b6fd403db25e80685df0ccb0/FLAG226e1081f [2021-12-16 09:01:46,885 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 09:01:46,886 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/Ackermann01-1.c [2021-12-16 09:01:46,901 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c67b52ff/8ce225e1b6fd403db25e80685df0ccb0/FLAG226e1081f [2021-12-16 09:01:46,914 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c67b52ff/8ce225e1b6fd403db25e80685df0ccb0 [2021-12-16 09:01:46,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 09:01:46,918 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 09:01:46,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 09:01:46,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 09:01:46,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 09:01:46,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:01:46" (1/1) ... [2021-12-16 09:01:46,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fc4e29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:46, skipping insertion in model container [2021-12-16 09:01:46,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:01:46" (1/1) ... [2021-12-16 09:01:46,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 09:01:46,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 09:01:47,058 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/Ackermann01-1.c[944,957] [2021-12-16 09:01:47,058 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 09:01:47,066 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 09:01:47,084 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/Ackermann01-1.c[944,957] [2021-12-16 09:01:47,086 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 09:01:47,095 INFO L208 MainTranslator]: Completed translation [2021-12-16 09:01:47,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:47 WrapperNode [2021-12-16 09:01:47,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 09:01:47,097 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 09:01:47,097 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 09:01:47,097 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 09:01:47,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:47" (1/1) ... [2021-12-16 09:01:47,106 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:47" (1/1) ... [2021-12-16 09:01:47,117 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2021-12-16 09:01:47,117 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 09:01:47,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 09:01:47,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 09:01:47,118 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 09:01:47,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:47" (1/1) ... [2021-12-16 09:01:47,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:47" (1/1) ... [2021-12-16 09:01:47,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:47" (1/1) ... [2021-12-16 09:01:47,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:47" (1/1) ... [2021-12-16 09:01:47,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:47" (1/1) ... [2021-12-16 09:01:47,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:47" (1/1) ... [2021-12-16 09:01:47,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:47" (1/1) ... [2021-12-16 09:01:47,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 09:01:47,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 09:01:47,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 09:01:47,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 09:01:47,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:47" (1/1) ... [2021-12-16 09:01:47,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 09:01:47,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:47,175 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) [2021-12-16 09:01:47,191 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 [2021-12-16 09:01:47,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 09:01:47,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 09:01:47,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 09:01:47,206 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2021-12-16 09:01:47,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2021-12-16 09:01:47,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 09:01:47,248 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 09:01:47,249 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 09:01:47,345 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 09:01:47,350 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 09:01:47,350 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-16 09:01:47,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:01:47 BoogieIcfgContainer [2021-12-16 09:01:47,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 09:01:47,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 09:01:47,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 09:01:47,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 09:01:47,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 09:01:46" (1/3) ... [2021-12-16 09:01:47,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f43adb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 09:01:47, skipping insertion in model container [2021-12-16 09:01:47,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:47" (2/3) ... [2021-12-16 09:01:47,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f43adb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 09:01:47, skipping insertion in model container [2021-12-16 09:01:47,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:01:47" (3/3) ... [2021-12-16 09:01:47,359 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann01-1.c [2021-12-16 09:01:47,363 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 09:01:47,363 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-12-16 09:01:47,408 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 09:01:47,415 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 [2021-12-16 09:01:47,415 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-12-16 09:01:47,427 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) [2021-12-16 09:01:47,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 09:01:47,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:47,433 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:47,433 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:01:47,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:47,437 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2021-12-16 09:01:47,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:47,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774097987] [2021-12-16 09:01:47,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:47,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:47,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:47,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774097987] [2021-12-16 09:01:47,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774097987] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:01:47,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 09:01:47,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 09:01:47,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732076835] [2021-12-16 09:01:47,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:01:47,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 09:01:47,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:47,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 09:01:47,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 09:01:47,681 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) [2021-12-16 09:01:47,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:47,805 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-12-16 09:01:47,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 09:01:47,807 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 [2021-12-16 09:01:47,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:47,817 INFO L225 Difference]: With dead ends: 73 [2021-12-16 09:01:47,817 INFO L226 Difference]: Without dead ends: 59 [2021-12-16 09:01:47,819 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 [2021-12-16 09:01:47,825 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 [2021-12-16 09:01:47,826 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] [2021-12-16 09:01:47,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-16 09:01:47,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2021-12-16 09:01:47,857 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) [2021-12-16 09:01:47,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2021-12-16 09:01:47,864 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2021-12-16 09:01:47,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:47,865 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2021-12-16 09:01:47,865 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) [2021-12-16 09:01:47,865 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2021-12-16 09:01:47,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-16 09:01:47,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:47,865 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:47,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 09:01:47,867 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:01:47,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:47,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2021-12-16 09:01:47,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:47,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192428991] [2021-12-16 09:01:47,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:47,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:47,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:47,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:47,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192428991] [2021-12-16 09:01:47,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192428991] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:01:47,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 09:01:47,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 09:01:47,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710333989] [2021-12-16 09:01:47,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:01:47,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 09:01:47,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:47,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 09:01:47,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 09:01:47,918 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) [2021-12-16 09:01:47,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:47,982 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-12-16 09:01:47,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 09:01:47,983 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 [2021-12-16 09:01:47,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:47,984 INFO L225 Difference]: With dead ends: 51 [2021-12-16 09:01:47,984 INFO L226 Difference]: Without dead ends: 49 [2021-12-16 09:01:47,986 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 [2021-12-16 09:01:47,987 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:47,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 47 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 09:01:47,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-16 09:01:48,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-16 09:01:48,002 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) [2021-12-16 09:01:48,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2021-12-16 09:01:48,004 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 9 [2021-12-16 09:01:48,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:48,005 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2021-12-16 09:01:48,005 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) [2021-12-16 09:01:48,005 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2021-12-16 09:01:48,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-16 09:01:48,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:48,006 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:48,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 09:01:48,008 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:01:48,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:48,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2021-12-16 09:01:48,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:48,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919009707] [2021-12-16 09:01:48,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:48,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:48,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:48,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919009707] [2021-12-16 09:01:48,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919009707] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:01:48,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 09:01:48,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 09:01:48,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182613433] [2021-12-16 09:01:48,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:01:48,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 09:01:48,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:48,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 09:01:48,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 09:01:48,056 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) [2021-12-16 09:01:48,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:48,113 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-12-16 09:01:48,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 09:01:48,113 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 [2021-12-16 09:01:48,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:48,115 INFO L225 Difference]: With dead ends: 76 [2021-12-16 09:01:48,115 INFO L226 Difference]: Without dead ends: 74 [2021-12-16 09:01:48,116 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 [2021-12-16 09:01:48,120 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 [2021-12-16 09:01:48,120 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] [2021-12-16 09:01:48,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-16 09:01:48,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-12-16 09:01:48,141 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) [2021-12-16 09:01:48,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2021-12-16 09:01:48,142 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 9 [2021-12-16 09:01:48,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:48,142 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2021-12-16 09:01:48,143 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) [2021-12-16 09:01:48,143 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2021-12-16 09:01:48,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-16 09:01:48,143 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:48,143 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:48,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 09:01:48,143 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:01:48,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:48,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2021-12-16 09:01:48,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:48,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485463133] [2021-12-16 09:01:48,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:48,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:48,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:48,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485463133] [2021-12-16 09:01:48,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485463133] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:01:48,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 09:01:48,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 09:01:48,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076792660] [2021-12-16 09:01:48,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:01:48,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 09:01:48,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:48,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 09:01:48,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 09:01:48,179 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) [2021-12-16 09:01:48,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:48,224 INFO L93 Difference]: Finished difference Result 116 states and 154 transitions. [2021-12-16 09:01:48,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 09:01:48,225 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 [2021-12-16 09:01:48,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:48,227 INFO L225 Difference]: With dead ends: 116 [2021-12-16 09:01:48,227 INFO L226 Difference]: Without dead ends: 108 [2021-12-16 09:01:48,228 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 [2021-12-16 09:01:48,229 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 [2021-12-16 09:01:48,229 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] [2021-12-16 09:01:48,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-16 09:01:48,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2021-12-16 09:01:48,238 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) [2021-12-16 09:01:48,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2021-12-16 09:01:48,239 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 10 [2021-12-16 09:01:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:48,239 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2021-12-16 09:01:48,239 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) [2021-12-16 09:01:48,239 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2021-12-16 09:01:48,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 09:01:48,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:48,240 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:48,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 09:01:48,240 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:01:48,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:48,241 INFO L85 PathProgramCache]: Analyzing trace with hash 219392943, now seen corresponding path program 1 times [2021-12-16 09:01:48,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:48,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128249644] [2021-12-16 09:01:48,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:48,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:48,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:48,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128249644] [2021-12-16 09:01:48,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128249644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:01:48,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 09:01:48,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 09:01:48,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520583756] [2021-12-16 09:01:48,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:01:48,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 09:01:48,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:48,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 09:01:48,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 09:01:48,288 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) [2021-12-16 09:01:48,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:48,319 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2021-12-16 09:01:48,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 09:01:48,319 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 [2021-12-16 09:01:48,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:48,321 INFO L225 Difference]: With dead ends: 168 [2021-12-16 09:01:48,321 INFO L226 Difference]: Without dead ends: 97 [2021-12-16 09:01:48,324 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 [2021-12-16 09:01:48,325 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 [2021-12-16 09:01:48,325 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] [2021-12-16 09:01:48,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-16 09:01:48,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-12-16 09:01:48,333 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) [2021-12-16 09:01:48,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2021-12-16 09:01:48,334 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 16 [2021-12-16 09:01:48,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:48,335 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2021-12-16 09:01:48,335 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) [2021-12-16 09:01:48,335 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2021-12-16 09:01:48,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 09:01:48,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:48,335 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:48,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 09:01:48,336 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:01:48,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:48,336 INFO L85 PathProgramCache]: Analyzing trace with hash 219399894, now seen corresponding path program 1 times [2021-12-16 09:01:48,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:48,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35385147] [2021-12-16 09:01:48,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:48,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:48,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:48,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35385147] [2021-12-16 09:01:48,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35385147] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:48,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909618948] [2021-12-16 09:01:48,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:48,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:48,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:48,376 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) [2021-12-16 09:01:48,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 09:01:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:48,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 09:01:48,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:48,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:48,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909618948] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:48,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:48,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-16 09:01:48,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578244173] [2021-12-16 09:01:48,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:48,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 09:01:48,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:48,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 09:01:48,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-16 09:01:48,567 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) [2021-12-16 09:01:48,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:48,886 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2021-12-16 09:01:48,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 09:01:48,886 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 [2021-12-16 09:01:48,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:48,888 INFO L225 Difference]: With dead ends: 274 [2021-12-16 09:01:48,888 INFO L226 Difference]: Without dead ends: 272 [2021-12-16 09:01:48,889 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 [2021-12-16 09:01:48,889 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 250 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:48,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 180 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 09:01:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-16 09:01:48,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2021-12-16 09:01:48,907 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) [2021-12-16 09:01:48,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2021-12-16 09:01:48,909 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 16 [2021-12-16 09:01:48,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:48,915 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2021-12-16 09:01:48,915 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) [2021-12-16 09:01:48,916 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2021-12-16 09:01:48,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 09:01:48,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:48,916 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:48,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 09:01:49,123 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 [2021-12-16 09:01:49,124 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:01:49,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:49,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1162887243, now seen corresponding path program 1 times [2021-12-16 09:01:49,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:49,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374993356] [2021-12-16 09:01:49,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:49,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:49,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:49,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:49,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:49,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374993356] [2021-12-16 09:01:49,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374993356] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:49,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984836188] [2021-12-16 09:01:49,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:49,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:49,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:49,161 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) [2021-12-16 09:01:49,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 09:01:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:49,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 09:01:49,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:49,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:49,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984836188] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:49,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:49,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-16 09:01:49,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485436324] [2021-12-16 09:01:49,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:49,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 09:01:49,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:49,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 09:01:49,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-16 09:01:49,301 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) [2021-12-16 09:01:49,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:49,523 INFO L93 Difference]: Finished difference Result 512 states and 695 transitions. [2021-12-16 09:01:49,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 09:01:49,523 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 [2021-12-16 09:01:49,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:49,526 INFO L225 Difference]: With dead ends: 512 [2021-12-16 09:01:49,526 INFO L226 Difference]: Without dead ends: 510 [2021-12-16 09:01:49,527 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 [2021-12-16 09:01:49,527 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 [2021-12-16 09:01:49,527 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] [2021-12-16 09:01:49,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-12-16 09:01:49,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 445. [2021-12-16 09:01:49,561 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) [2021-12-16 09:01:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 561 transitions. [2021-12-16 09:01:49,563 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 561 transitions. Word has length 17 [2021-12-16 09:01:49,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:49,564 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 561 transitions. [2021-12-16 09:01:49,564 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) [2021-12-16 09:01:49,564 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 561 transitions. [2021-12-16 09:01:49,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-16 09:01:49,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:49,565 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] [2021-12-16 09:01:49,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 09:01:49,765 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 [2021-12-16 09:01:49,765 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:01:49,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:49,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2021-12-16 09:01:49,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:49,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066299207] [2021-12-16 09:01:49,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:49,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:49,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 09:01:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 09:01:49,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:49,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066299207] [2021-12-16 09:01:49,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066299207] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:49,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582185069] [2021-12-16 09:01:49,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:49,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:49,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:49,820 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) [2021-12-16 09:01:49,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 09:01:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:49,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 09:01:49,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 09:01:49,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 09:01:50,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582185069] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:50,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:50,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2021-12-16 09:01:50,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106497529] [2021-12-16 09:01:50,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:50,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 09:01:50,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:50,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 09:01:50,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-12-16 09:01:50,097 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) [2021-12-16 09:01:50,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:50,574 INFO L93 Difference]: Finished difference Result 1122 states and 1582 transitions. [2021-12-16 09:01:50,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 09:01:50,575 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 [2021-12-16 09:01:50,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:50,578 INFO L225 Difference]: With dead ends: 1122 [2021-12-16 09:01:50,579 INFO L226 Difference]: Without dead ends: 781 [2021-12-16 09:01:50,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2021-12-16 09:01:50,589 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 282 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:50,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 98 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 09:01:50,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-12-16 09:01:50,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 585. [2021-12-16 09:01:50,632 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) [2021-12-16 09:01:50,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 730 transitions. [2021-12-16 09:01:50,637 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 730 transitions. Word has length 24 [2021-12-16 09:01:50,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:50,637 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 730 transitions. [2021-12-16 09:01:50,638 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) [2021-12-16 09:01:50,638 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 730 transitions. [2021-12-16 09:01:50,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 09:01:50,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:50,648 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:50,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 09:01:50,849 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 [2021-12-16 09:01:50,849 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:01:50,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:50,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1403347671, now seen corresponding path program 1 times [2021-12-16 09:01:50,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:50,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112460315] [2021-12-16 09:01:50,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:50,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:50,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:50,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112460315] [2021-12-16 09:01:50,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112460315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:50,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944914888] [2021-12-16 09:01:50,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:50,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:50,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:50,920 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) [2021-12-16 09:01:50,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 09:01:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:50,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 09:01:50,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:50,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:51,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944914888] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:51,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:51,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-12-16 09:01:51,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055259799] [2021-12-16 09:01:51,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:51,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 09:01:51,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:51,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 09:01:51,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-12-16 09:01:51,081 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) [2021-12-16 09:01:51,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:51,381 INFO L93 Difference]: Finished difference Result 1053 states and 1343 transitions. [2021-12-16 09:01:51,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 09:01:51,382 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 [2021-12-16 09:01:51,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:51,386 INFO L225 Difference]: With dead ends: 1053 [2021-12-16 09:01:51,386 INFO L226 Difference]: Without dead ends: 1052 [2021-12-16 09:01:51,387 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 [2021-12-16 09:01:51,388 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:51,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 249 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 09:01:51,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-12-16 09:01:51,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 901. [2021-12-16 09:01:51,419 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) [2021-12-16 09:01:51,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1098 transitions. [2021-12-16 09:01:51,423 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1098 transitions. Word has length 28 [2021-12-16 09:01:51,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:51,423 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 1098 transitions. [2021-12-16 09:01:51,423 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) [2021-12-16 09:01:51,423 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1098 transitions. [2021-12-16 09:01:51,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 09:01:51,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:51,424 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] [2021-12-16 09:01:51,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 09:01:51,641 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 [2021-12-16 09:01:51,641 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:01:51,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:51,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1583952330, now seen corresponding path program 1 times [2021-12-16 09:01:51,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:51,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602983994] [2021-12-16 09:01:51,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:51,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:51,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 09:01:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 09:01:51,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:51,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602983994] [2021-12-16 09:01:51,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602983994] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:51,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403211217] [2021-12-16 09:01:51,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:51,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:51,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:51,712 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) [2021-12-16 09:01:51,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 09:01:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:51,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 09:01:51,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 09:01:51,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 09:01:51,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403211217] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:51,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:51,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-12-16 09:01:51,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500900884] [2021-12-16 09:01:51,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:51,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 09:01:51,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:51,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 09:01:51,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-16 09:01:51,920 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) [2021-12-16 09:01:52,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:52,112 INFO L93 Difference]: Finished difference Result 1027 states and 1299 transitions. [2021-12-16 09:01:52,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 09:01:52,113 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 [2021-12-16 09:01:52,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:52,118 INFO L225 Difference]: With dead ends: 1027 [2021-12-16 09:01:52,118 INFO L226 Difference]: Without dead ends: 1026 [2021-12-16 09:01:52,119 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 [2021-12-16 09:01:52,119 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 [2021-12-16 09:01:52,120 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] [2021-12-16 09:01:52,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-12-16 09:01:52,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 943. [2021-12-16 09:01:52,150 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) [2021-12-16 09:01:52,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1148 transitions. [2021-12-16 09:01:52,154 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1148 transitions. Word has length 28 [2021-12-16 09:01:52,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:52,154 INFO L470 AbstractCegarLoop]: Abstraction has 943 states and 1148 transitions. [2021-12-16 09:01:52,155 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) [2021-12-16 09:01:52,155 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1148 transitions. [2021-12-16 09:01:52,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-16 09:01:52,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:52,157 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] [2021-12-16 09:01:52,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 09:01:52,373 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 [2021-12-16 09:01:52,374 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:01:52,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:52,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1777813581, now seen corresponding path program 1 times [2021-12-16 09:01:52,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:52,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136152559] [2021-12-16 09:01:52,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:52,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:52,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 09:01:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:52,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 09:01:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:52,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 09:01:52,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:52,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136152559] [2021-12-16 09:01:52,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136152559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:52,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474220811] [2021-12-16 09:01:52,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:52,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:52,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:52,464 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) [2021-12-16 09:01:52,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 09:01:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:52,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 09:01:52,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 09:01:52,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 09:01:52,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474220811] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:52,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:52,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-12-16 09:01:52,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571023694] [2021-12-16 09:01:52,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:52,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 09:01:52,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:52,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 09:01:52,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-16 09:01:52,714 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) [2021-12-16 09:01:53,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:53,124 INFO L93 Difference]: Finished difference Result 1435 states and 2099 transitions. [2021-12-16 09:01:53,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 09:01:53,124 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 [2021-12-16 09:01:53,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:53,130 INFO L225 Difference]: With dead ends: 1435 [2021-12-16 09:01:53,131 INFO L226 Difference]: Without dead ends: 1433 [2021-12-16 09:01:53,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-12-16 09:01:53,133 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 143 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:53,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 208 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 09:01:53,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2021-12-16 09:01:53,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1237. [2021-12-16 09:01:53,175 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) [2021-12-16 09:01:53,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1651 transitions. [2021-12-16 09:01:53,181 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1651 transitions. Word has length 33 [2021-12-16 09:01:53,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:53,181 INFO L470 AbstractCegarLoop]: Abstraction has 1237 states and 1651 transitions. [2021-12-16 09:01:53,181 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) [2021-12-16 09:01:53,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1651 transitions. [2021-12-16 09:01:53,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 09:01:53,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:53,182 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] [2021-12-16 09:01:53,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 09:01:53,395 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 [2021-12-16 09:01:53,395 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:01:53,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:53,396 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2021-12-16 09:01:53,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:53,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982505465] [2021-12-16 09:01:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:53,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:53,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 09:01:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:53,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 09:01:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 09:01:53,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:53,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982505465] [2021-12-16 09:01:53,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982505465] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:53,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969261257] [2021-12-16 09:01:53,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:53,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:53,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:53,488 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) [2021-12-16 09:01:53,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 09:01:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:53,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 09:01:53,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 09:01:53,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 09:01:53,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969261257] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:53,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 09:01:53,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2021-12-16 09:01:53,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949163698] [2021-12-16 09:01:53,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:01:53,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 09:01:53,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:53,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 09:01:53,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-12-16 09:01:53,731 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) [2021-12-16 09:01:53,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:53,882 INFO L93 Difference]: Finished difference Result 1303 states and 1719 transitions. [2021-12-16 09:01:53,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 09:01:53,882 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 [2021-12-16 09:01:53,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:53,887 INFO L225 Difference]: With dead ends: 1303 [2021-12-16 09:01:53,887 INFO L226 Difference]: Without dead ends: 1302 [2021-12-16 09:01:53,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-12-16 09:01:53,888 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 [2021-12-16 09:01:53,888 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] [2021-12-16 09:01:53,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-12-16 09:01:53,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1236. [2021-12-16 09:01:53,934 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) [2021-12-16 09:01:53,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1643 transitions. [2021-12-16 09:01:53,939 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1643 transitions. Word has length 34 [2021-12-16 09:01:53,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:53,940 INFO L470 AbstractCegarLoop]: Abstraction has 1236 states and 1643 transitions. [2021-12-16 09:01:53,940 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) [2021-12-16 09:01:53,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1643 transitions. [2021-12-16 09:01:53,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-16 09:01:53,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:53,941 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] [2021-12-16 09:01:53,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 09:01:54,155 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 [2021-12-16 09:01:54,155 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:01:54,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:54,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1699542727, now seen corresponding path program 1 times [2021-12-16 09:01:54,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:54,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574907773] [2021-12-16 09:01:54,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:54,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:54,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 09:01:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:54,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 09:01:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 09:01:54,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:54,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574907773] [2021-12-16 09:01:54,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574907773] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:54,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360242432] [2021-12-16 09:01:54,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:54,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:54,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:54,219 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) [2021-12-16 09:01:54,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 09:01:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:54,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 09:01:54,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 09:01:54,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 09:01:54,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360242432] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:54,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 09:01:54,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2021-12-16 09:01:54,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358908988] [2021-12-16 09:01:54,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:01:54,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 09:01:54,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:54,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 09:01:54,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-12-16 09:01:54,484 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) [2021-12-16 09:01:54,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:54,681 INFO L93 Difference]: Finished difference Result 1343 states and 1866 transitions. [2021-12-16 09:01:54,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 09:01:54,681 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 [2021-12-16 09:01:54,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:54,686 INFO L225 Difference]: With dead ends: 1343 [2021-12-16 09:01:54,686 INFO L226 Difference]: Without dead ends: 1342 [2021-12-16 09:01:54,687 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 [2021-12-16 09:01:54,687 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 [2021-12-16 09:01:54,687 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] [2021-12-16 09:01:54,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-12-16 09:01:54,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1244. [2021-12-16 09:01:54,735 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) [2021-12-16 09:01:54,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1576 transitions. [2021-12-16 09:01:54,739 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1576 transitions. Word has length 37 [2021-12-16 09:01:54,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:54,740 INFO L470 AbstractCegarLoop]: Abstraction has 1244 states and 1576 transitions. [2021-12-16 09:01:54,740 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) [2021-12-16 09:01:54,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1576 transitions. [2021-12-16 09:01:54,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 09:01:54,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:54,741 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] [2021-12-16 09:01:54,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 09:01:54,957 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 [2021-12-16 09:01:54,957 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:01:54,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:54,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1975915362, now seen corresponding path program 2 times [2021-12-16 09:01:54,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:54,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043912366] [2021-12-16 09:01:54,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:54,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:55,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-16 09:01:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 09:01:55,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:55,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043912366] [2021-12-16 09:01:55,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043912366] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:55,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317066607] [2021-12-16 09:01:55,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 09:01:55,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:55,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:55,050 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) [2021-12-16 09:01:55,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 09:01:55,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 09:01:55,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:01:55,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 09:01:55,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 09:01:55,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 09:01:55,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317066607] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:55,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:55,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2021-12-16 09:01:55,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829001312] [2021-12-16 09:01:55,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:55,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 09:01:55,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:55,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 09:01:55,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-12-16 09:01:55,379 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) [2021-12-16 09:01:55,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:55,812 INFO L93 Difference]: Finished difference Result 1537 states and 1982 transitions. [2021-12-16 09:01:55,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-16 09:01:55,812 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 [2021-12-16 09:01:55,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:55,817 INFO L225 Difference]: With dead ends: 1537 [2021-12-16 09:01:55,817 INFO L226 Difference]: Without dead ends: 1536 [2021-12-16 09:01:55,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=420, Invalid=1302, Unknown=0, NotChecked=0, Total=1722 [2021-12-16 09:01:55,818 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 333 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:55,818 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] [2021-12-16 09:01:55,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-12-16 09:01:55,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1281. [2021-12-16 09:01:55,856 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) [2021-12-16 09:01:55,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1618 transitions. [2021-12-16 09:01:55,860 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1618 transitions. Word has length 44 [2021-12-16 09:01:55,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:55,861 INFO L470 AbstractCegarLoop]: Abstraction has 1281 states and 1618 transitions. [2021-12-16 09:01:55,861 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) [2021-12-16 09:01:55,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1618 transitions. [2021-12-16 09:01:55,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 09:01:55,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:55,862 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] [2021-12-16 09:01:55,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 09:01:56,075 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 [2021-12-16 09:01:56,075 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:01:56,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:56,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1560392739, now seen corresponding path program 2 times [2021-12-16 09:01:56,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:56,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894221338] [2021-12-16 09:01:56,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:56,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:56,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 09:01:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:56,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 09:01:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 09:01:56,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:56,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894221338] [2021-12-16 09:01:56,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894221338] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:56,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806754601] [2021-12-16 09:01:56,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 09:01:56,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:56,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:56,166 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) [2021-12-16 09:01:56,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 09:01:56,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 09:01:56,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:01:56,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 09:01:56,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 09:01:56,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 09:01:56,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806754601] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:56,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:56,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2021-12-16 09:01:56,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437947445] [2021-12-16 09:01:56,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:56,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 09:01:56,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:56,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 09:01:56,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-12-16 09:01:56,487 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) [2021-12-16 09:01:57,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:57,396 INFO L93 Difference]: Finished difference Result 2805 states and 4077 transitions. [2021-12-16 09:01:57,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-16 09:01:57,402 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 [2021-12-16 09:01:57,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:57,410 INFO L225 Difference]: With dead ends: 2805 [2021-12-16 09:01:57,410 INFO L226 Difference]: Without dead ends: 1937 [2021-12-16 09:01:57,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=586, Invalid=1964, Unknown=0, NotChecked=0, Total=2550 [2021-12-16 09:01:57,417 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 225 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2021-12-16 09:01:57,417 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] [2021-12-16 09:01:57,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-12-16 09:01:57,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1461. [2021-12-16 09:01:57,472 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) [2021-12-16 09:01:57,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 1829 transitions. [2021-12-16 09:01:57,476 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 1829 transitions. Word has length 45 [2021-12-16 09:01:57,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:57,477 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 1829 transitions. [2021-12-16 09:01:57,477 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) [2021-12-16 09:01:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 1829 transitions. [2021-12-16 09:01:57,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 09:01:57,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:57,479 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] [2021-12-16 09:01:57,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 09:01:57,695 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 [2021-12-16 09:01:57,695 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:01:57,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:57,696 INFO L85 PathProgramCache]: Analyzing trace with hash -242379077, now seen corresponding path program 1 times [2021-12-16 09:01:57,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:57,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938411774] [2021-12-16 09:01:57,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:57,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:57,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 09:01:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:57,752 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 09:01:57,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:57,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938411774] [2021-12-16 09:01:57,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938411774] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:57,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098547504] [2021-12-16 09:01:57,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:57,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:57,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:57,755 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) [2021-12-16 09:01:57,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 09:01:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:57,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 09:01:57,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 09:01:57,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 09:01:58,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098547504] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:58,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:58,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2021-12-16 09:01:58,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617130073] [2021-12-16 09:01:58,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:58,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 09:01:58,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:58,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 09:01:58,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-12-16 09:01:58,033 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) [2021-12-16 09:01:58,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:58,563 INFO L93 Difference]: Finished difference Result 1895 states and 2483 transitions. [2021-12-16 09:01:58,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-16 09:01:58,564 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 [2021-12-16 09:01:58,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:58,571 INFO L225 Difference]: With dead ends: 1895 [2021-12-16 09:01:58,571 INFO L226 Difference]: Without dead ends: 1824 [2021-12-16 09:01:58,572 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 [2021-12-16 09:01:58,572 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 [2021-12-16 09:01:58,572 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] [2021-12-16 09:01:58,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-12-16 09:01:58,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1397. [2021-12-16 09:01:58,626 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) [2021-12-16 09:01:58,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 1749 transitions. [2021-12-16 09:01:58,630 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 1749 transitions. Word has length 52 [2021-12-16 09:01:58,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:58,631 INFO L470 AbstractCegarLoop]: Abstraction has 1397 states and 1749 transitions. [2021-12-16 09:01:58,631 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) [2021-12-16 09:01:58,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 1749 transitions. [2021-12-16 09:01:58,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 09:01:58,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:58,632 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] [2021-12-16 09:01:58,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 09:01:58,851 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 [2021-12-16 09:01:58,851 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:01:58,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:58,852 INFO L85 PathProgramCache]: Analyzing trace with hash 442862615, now seen corresponding path program 1 times [2021-12-16 09:01:58,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:58,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775469068] [2021-12-16 09:01:58,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:58,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:58,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 09:01:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:58,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 09:01:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:58,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 09:01:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:58,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 09:01:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 09:01:58,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:58,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775469068] [2021-12-16 09:01:58,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775469068] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:58,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901322963] [2021-12-16 09:01:58,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:58,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:58,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:58,948 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) [2021-12-16 09:01:58,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 09:01:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:58,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-16 09:01:58,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-16 09:01:59,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 09:01:59,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901322963] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:59,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:59,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2021-12-16 09:01:59,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538273558] [2021-12-16 09:01:59,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:59,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-16 09:01:59,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:59,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-16 09:01:59,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-12-16 09:01:59,474 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) [2021-12-16 09:02:00,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:00,751 INFO L93 Difference]: Finished difference Result 3379 states and 6003 transitions. [2021-12-16 09:02:00,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-16 09:02:00,752 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 [2021-12-16 09:02:00,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:00,768 INFO L225 Difference]: With dead ends: 3379 [2021-12-16 09:02:00,768 INFO L226 Difference]: Without dead ends: 3377 [2021-12-16 09:02:00,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1158, Invalid=5004, Unknown=0, NotChecked=0, Total=6162 [2021-12-16 09:02:00,772 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 171 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:00,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 238 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 09:02:00,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3377 states. [2021-12-16 09:02:00,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3377 to 2467. [2021-12-16 09:02:00,903 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) [2021-12-16 09:02:00,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 4824 transitions. [2021-12-16 09:02:00,915 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 4824 transitions. Word has length 52 [2021-12-16 09:02:00,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:00,915 INFO L470 AbstractCegarLoop]: Abstraction has 2467 states and 4824 transitions. [2021-12-16 09:02:00,915 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) [2021-12-16 09:02:00,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 4824 transitions. [2021-12-16 09:02:00,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-16 09:02:00,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:00,918 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:00,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:01,135 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 [2021-12-16 09:02:01,135 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:02:01,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:01,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1991697283, now seen corresponding path program 1 times [2021-12-16 09:02:01,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:01,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650284872] [2021-12-16 09:02:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:01,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 09:02:01,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:01,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650284872] [2021-12-16 09:02:01,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650284872] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:01,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696624930] [2021-12-16 09:02:01,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:01,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:01,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:01,219 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) [2021-12-16 09:02:01,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 09:02:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:01,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 09:02:01,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 09:02:01,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 09:02:01,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696624930] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:01,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:01,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-12-16 09:02:01,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541165099] [2021-12-16 09:02:01,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:01,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 09:02:01,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:01,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 09:02:01,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-12-16 09:02:01,613 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) [2021-12-16 09:02:02,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:02,261 INFO L93 Difference]: Finished difference Result 7309 states and 13959 transitions. [2021-12-16 09:02:02,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-16 09:02:02,262 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 [2021-12-16 09:02:02,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:02,300 INFO L225 Difference]: With dead ends: 7309 [2021-12-16 09:02:02,300 INFO L226 Difference]: Without dead ends: 7308 [2021-12-16 09:02:02,305 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 [2021-12-16 09:02:02,305 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 875 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:02,306 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] [2021-12-16 09:02:02,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7308 states. [2021-12-16 09:02:02,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7308 to 6715. [2021-12-16 09:02:02,648 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) [2021-12-16 09:02:02,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6715 states to 6715 states and 13020 transitions. [2021-12-16 09:02:02,698 INFO L78 Accepts]: Start accepts. Automaton has 6715 states and 13020 transitions. Word has length 58 [2021-12-16 09:02:02,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:02,698 INFO L470 AbstractCegarLoop]: Abstraction has 6715 states and 13020 transitions. [2021-12-16 09:02:02,699 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) [2021-12-16 09:02:02,699 INFO L276 IsEmpty]: Start isEmpty. Operand 6715 states and 13020 transitions. [2021-12-16 09:02:02,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-16 09:02:02,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:02,701 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] [2021-12-16 09:02:02,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:02,907 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 [2021-12-16 09:02:02,907 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:02:02,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:02,908 INFO L85 PathProgramCache]: Analyzing trace with hash 526800899, now seen corresponding path program 1 times [2021-12-16 09:02:02,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:02,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057074034] [2021-12-16 09:02:02,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:02,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:02,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 09:02:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:02,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 09:02:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:02,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 09:02:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:03,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 09:02:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 09:02:03,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:03,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057074034] [2021-12-16 09:02:03,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057074034] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:03,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28292250] [2021-12-16 09:02:03,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:03,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:03,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:03,025 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) [2021-12-16 09:02:03,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 09:02:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:03,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-16 09:02:03,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-16 09:02:03,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 09:02:03,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28292250] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:03,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:03,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2021-12-16 09:02:03,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280157719] [2021-12-16 09:02:03,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:03,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-16 09:02:03,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:03,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-16 09:02:03,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-12-16 09:02:03,553 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) [2021-12-16 09:02:05,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:05,735 INFO L93 Difference]: Finished difference Result 26411 states and 94719 transitions. [2021-12-16 09:02:05,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-16 09:02:05,735 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 [2021-12-16 09:02:05,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:06,065 INFO L225 Difference]: With dead ends: 26411 [2021-12-16 09:02:06,066 INFO L226 Difference]: Without dead ends: 20152 [2021-12-16 09:02:06,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1251, Invalid=4755, Unknown=0, NotChecked=0, Total=6006 [2021-12-16 09:02:06,194 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 159 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:06,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 296 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 09:02:06,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20152 states. [2021-12-16 09:02:07,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20152 to 14221. [2021-12-16 09:02:07,595 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) [2021-12-16 09:02:07,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14221 states to 14221 states and 49139 transitions. [2021-12-16 09:02:07,806 INFO L78 Accepts]: Start accepts. Automaton has 14221 states and 49139 transitions. Word has length 56 [2021-12-16 09:02:07,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:07,807 INFO L470 AbstractCegarLoop]: Abstraction has 14221 states and 49139 transitions. [2021-12-16 09:02:07,807 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) [2021-12-16 09:02:07,807 INFO L276 IsEmpty]: Start isEmpty. Operand 14221 states and 49139 transitions. [2021-12-16 09:02:07,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-16 09:02:07,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:07,810 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:07,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:08,025 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 [2021-12-16 09:02:08,026 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:02:08,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:08,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1996075823, now seen corresponding path program 2 times [2021-12-16 09:02:08,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:08,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613303495] [2021-12-16 09:02:08,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:08,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:02:08,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:08,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613303495] [2021-12-16 09:02:08,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613303495] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:08,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564008836] [2021-12-16 09:02:08,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 09:02:08,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:08,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:08,132 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) [2021-12-16 09:02:08,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 09:02:08,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 09:02:08,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:02:08,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 09:02:08,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:02:08,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:02:08,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564008836] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:08,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:08,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2021-12-16 09:02:08,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399525923] [2021-12-16 09:02:08,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:08,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-16 09:02:08,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:08,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-16 09:02:08,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2021-12-16 09:02:08,572 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) [2021-12-16 09:02:10,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:10,128 INFO L93 Difference]: Finished difference Result 22021 states and 73282 transitions. [2021-12-16 09:02:10,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-16 09:02:10,129 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 [2021-12-16 09:02:10,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:10,276 INFO L225 Difference]: With dead ends: 22021 [2021-12-16 09:02:10,276 INFO L226 Difference]: Without dead ends: 22020 [2021-12-16 09:02:10,289 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 [2021-12-16 09:02:10,291 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:10,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 626 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 09:02:10,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22020 states. [2021-12-16 09:02:11,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22020 to 20851. [2021-12-16 09:02:11,817 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) [2021-12-16 09:02:12,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20851 states to 20851 states and 70586 transitions. [2021-12-16 09:02:12,052 INFO L78 Accepts]: Start accepts. Automaton has 20851 states and 70586 transitions. Word has length 60 [2021-12-16 09:02:12,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:12,052 INFO L470 AbstractCegarLoop]: Abstraction has 20851 states and 70586 transitions. [2021-12-16 09:02:12,052 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) [2021-12-16 09:02:12,052 INFO L276 IsEmpty]: Start isEmpty. Operand 20851 states and 70586 transitions. [2021-12-16 09:02:12,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-16 09:02:12,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:12,054 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] [2021-12-16 09:02:12,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:12,267 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 [2021-12-16 09:02:12,267 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:02:12,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:12,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1312915314, now seen corresponding path program 3 times [2021-12-16 09:02:12,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:12,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671808128] [2021-12-16 09:02:12,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:12,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:12,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-16 09:02:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 3 proven. 116 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 09:02:12,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:12,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671808128] [2021-12-16 09:02:12,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671808128] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:12,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725020283] [2021-12-16 09:02:12,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 09:02:12,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:12,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:12,369 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) [2021-12-16 09:02:12,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 09:02:12,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-16 09:02:12,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:02:12,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 09:02:12,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:12,486 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-16 09:02:12,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 09:02:12,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725020283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:02:12,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 09:02:12,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 19 [2021-12-16 09:02:12,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440420541] [2021-12-16 09:02:12,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:02:12,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 09:02:12,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:12,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 09:02:12,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-12-16 09:02:12,488 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) [2021-12-16 09:02:13,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:13,403 INFO L93 Difference]: Finished difference Result 20934 states and 72002 transitions. [2021-12-16 09:02:13,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 09:02:13,403 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 [2021-12-16 09:02:13,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:13,567 INFO L225 Difference]: With dead ends: 20934 [2021-12-16 09:02:13,567 INFO L226 Difference]: Without dead ends: 18654 [2021-12-16 09:02:13,589 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 [2021-12-16 09:02:13,590 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 [2021-12-16 09:02:13,591 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] [2021-12-16 09:02:13,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18654 states. [2021-12-16 09:02:14,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18654 to 18557. [2021-12-16 09:02:15,020 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) [2021-12-16 09:02:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18557 states to 18557 states and 67820 transitions. [2021-12-16 09:02:15,252 INFO L78 Accepts]: Start accepts. Automaton has 18557 states and 67820 transitions. Word has length 60 [2021-12-16 09:02:15,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:15,252 INFO L470 AbstractCegarLoop]: Abstraction has 18557 states and 67820 transitions. [2021-12-16 09:02:15,253 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) [2021-12-16 09:02:15,253 INFO L276 IsEmpty]: Start isEmpty. Operand 18557 states and 67820 transitions. [2021-12-16 09:02:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-16 09:02:15,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:15,257 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:15,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:15,473 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 [2021-12-16 09:02:15,474 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:02:15,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:15,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2027008992, now seen corresponding path program 2 times [2021-12-16 09:02:15,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:15,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714858399] [2021-12-16 09:02:15,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:15,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:15,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-16 09:02:15,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:15,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 09:02:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:15,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 09:02:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:15,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 09:02:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:15,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 09:02:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 89 proven. 17 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-16 09:02:15,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:15,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714858399] [2021-12-16 09:02:15,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714858399] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:15,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290730809] [2021-12-16 09:02:15,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 09:02:15,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:15,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:15,619 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) [2021-12-16 09:02:15,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 09:02:15,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 09:02:15,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:02:15,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 09:02:15,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:15,805 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 78 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-16 09:02:15,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 97 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-16 09:02:16,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290730809] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:16,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:16,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2021-12-16 09:02:16,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244595591] [2021-12-16 09:02:16,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:16,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 09:02:16,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:16,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 09:02:16,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 09:02:16,567 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) [2021-12-16 09:02:18,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:18,049 INFO L93 Difference]: Finished difference Result 29009 states and 107470 transitions. [2021-12-16 09:02:18,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-16 09:02:18,050 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 81 [2021-12-16 09:02:18,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:18,102 INFO L225 Difference]: With dead ends: 29009 [2021-12-16 09:02:18,103 INFO L226 Difference]: Without dead ends: 10982 [2021-12-16 09:02:18,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=673, Invalid=2633, Unknown=0, NotChecked=0, Total=3306 [2021-12-16 09:02:18,311 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 184 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:18,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 342 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 09:02:18,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10982 states. [2021-12-16 09:02:18,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10982 to 10399. [2021-12-16 09:02:18,824 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) [2021-12-16 09:02:18,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10399 states to 10399 states and 16302 transitions. [2021-12-16 09:02:18,868 INFO L78 Accepts]: Start accepts. Automaton has 10399 states and 16302 transitions. Word has length 81 [2021-12-16 09:02:18,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:18,869 INFO L470 AbstractCegarLoop]: Abstraction has 10399 states and 16302 transitions. [2021-12-16 09:02:18,869 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) [2021-12-16 09:02:18,869 INFO L276 IsEmpty]: Start isEmpty. Operand 10399 states and 16302 transitions. [2021-12-16 09:02:18,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-16 09:02:18,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:18,871 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] [2021-12-16 09:02:18,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:19,087 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 [2021-12-16 09:02:19,088 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:02:19,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:19,088 INFO L85 PathProgramCache]: Analyzing trace with hash -131434271, now seen corresponding path program 3 times [2021-12-16 09:02:19,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:19,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145624494] [2021-12-16 09:02:19,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:19,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:19,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 09:02:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:19,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 09:02:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 09:02:19,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:19,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145624494] [2021-12-16 09:02:19,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145624494] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:19,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844205211] [2021-12-16 09:02:19,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 09:02:19,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:19,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:19,204 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) [2021-12-16 09:02:19,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-16 09:02:19,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-16 09:02:19,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:02:19,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 09:02:19,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:19,466 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 09:02:19,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 65 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 09:02:19,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844205211] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:19,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:19,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2021-12-16 09:02:19,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066504962] [2021-12-16 09:02:19,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:19,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-16 09:02:19,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:19,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-16 09:02:19,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 09:02:19,810 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) [2021-12-16 09:02:20,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:20,513 INFO L93 Difference]: Finished difference Result 11154 states and 17444 transitions. [2021-12-16 09:02:20,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 09:02:20,513 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 [2021-12-16 09:02:20,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:20,543 INFO L225 Difference]: With dead ends: 11154 [2021-12-16 09:02:20,543 INFO L226 Difference]: Without dead ends: 11153 [2021-12-16 09:02:20,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=577, Invalid=1973, Unknown=0, NotChecked=0, Total=2550 [2021-12-16 09:02:20,549 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 177 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:20,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 242 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 09:02:20,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11153 states. [2021-12-16 09:02:21,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11153 to 10507. [2021-12-16 09:02:21,009 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) [2021-12-16 09:02:21,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10507 states to 10507 states and 16450 transitions. [2021-12-16 09:02:21,040 INFO L78 Accepts]: Start accepts. Automaton has 10507 states and 16450 transitions. Word has length 69 [2021-12-16 09:02:21,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:21,040 INFO L470 AbstractCegarLoop]: Abstraction has 10507 states and 16450 transitions. [2021-12-16 09:02:21,040 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) [2021-12-16 09:02:21,040 INFO L276 IsEmpty]: Start isEmpty. Operand 10507 states and 16450 transitions. [2021-12-16 09:02:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-16 09:02:21,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:21,043 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 7, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:21,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:21,259 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 [2021-12-16 09:02:21,259 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:02:21,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:21,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1701452426, now seen corresponding path program 2 times [2021-12-16 09:02:21,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:21,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132871461] [2021-12-16 09:02:21,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:21,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:21,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 09:02:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:21,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 09:02:21,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:21,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 09:02:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:21,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 09:02:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:21,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 09:02:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:21,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 09:02:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:21,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-16 09:02:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 136 proven. 24 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-16 09:02:21,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:21,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132871461] [2021-12-16 09:02:21,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132871461] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:21,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833103729] [2021-12-16 09:02:21,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 09:02:21,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:21,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:21,334 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) [2021-12-16 09:02:21,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-16 09:02:21,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 09:02:21,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:02:21,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 09:02:21,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 136 proven. 15 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-12-16 09:02:21,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 136 proven. 26 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 09:02:21,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833103729] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:21,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:21,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2021-12-16 09:02:21,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739265143] [2021-12-16 09:02:21,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:21,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 09:02:21,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:21,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 09:02:21,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-16 09:02:21,880 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) [2021-12-16 09:02:22,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:22,292 INFO L93 Difference]: Finished difference Result 21303 states and 37540 transitions. [2021-12-16 09:02:22,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 09:02:22,292 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) Word has length 104 [2021-12-16 09:02:22,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:22,330 INFO L225 Difference]: With dead ends: 21303 [2021-12-16 09:02:22,330 INFO L226 Difference]: Without dead ends: 11691 [2021-12-16 09:02:22,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-12-16 09:02:22,363 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 92 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:22,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 73 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 09:02:22,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11691 states. [2021-12-16 09:02:22,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11691 to 10501. [2021-12-16 09:02:22,817 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) [2021-12-16 09:02:22,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10501 states to 10501 states and 16364 transitions. [2021-12-16 09:02:22,848 INFO L78 Accepts]: Start accepts. Automaton has 10501 states and 16364 transitions. Word has length 104 [2021-12-16 09:02:22,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:22,848 INFO L470 AbstractCegarLoop]: Abstraction has 10501 states and 16364 transitions. [2021-12-16 09:02:22,848 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) [2021-12-16 09:02:22,848 INFO L276 IsEmpty]: Start isEmpty. Operand 10501 states and 16364 transitions. [2021-12-16 09:02:22,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-16 09:02:22,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:22,852 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] [2021-12-16 09:02:22,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:23,060 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 [2021-12-16 09:02:23,060 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:02:23,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:23,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1897499616, now seen corresponding path program 3 times [2021-12-16 09:02:23,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:23,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414255946] [2021-12-16 09:02:23,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:23,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:23,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 09:02:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:23,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 09:02:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:23,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 09:02:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:23,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 09:02:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:23,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 09:02:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:23,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 09:02:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:23,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 09:02:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:23,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 09:02:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:23,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 09:02:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 113 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-16 09:02:23,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:23,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414255946] [2021-12-16 09:02:23,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414255946] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:23,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612194403] [2021-12-16 09:02:23,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 09:02:23,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:23,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:23,188 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) [2021-12-16 09:02:23,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-16 09:02:23,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-16 09:02:23,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:02:23,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 09:02:23,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 150 proven. 26 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-16 09:02:23,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 119 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-16 09:02:23,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612194403] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:23,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:23,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2021-12-16 09:02:23,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892429199] [2021-12-16 09:02:23,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:23,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 09:02:23,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:23,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 09:02:23,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-12-16 09:02:23,991 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) [2021-12-16 09:02:24,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:24,745 INFO L93 Difference]: Finished difference Result 24332 states and 49250 transitions. [2021-12-16 09:02:24,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 09:02:24,746 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 [2021-12-16 09:02:24,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:24,825 INFO L225 Difference]: With dead ends: 24332 [2021-12-16 09:02:24,825 INFO L226 Difference]: Without dead ends: 14755 [2021-12-16 09:02:24,897 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 [2021-12-16 09:02:24,897 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 82 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:24,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 152 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 09:02:24,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14755 states. [2021-12-16 09:02:25,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14755 to 14389. [2021-12-16 09:02:25,624 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) [2021-12-16 09:02:25,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14389 states to 14389 states and 22812 transitions. [2021-12-16 09:02:25,676 INFO L78 Accepts]: Start accepts. Automaton has 14389 states and 22812 transitions. Word has length 99 [2021-12-16 09:02:25,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:25,676 INFO L470 AbstractCegarLoop]: Abstraction has 14389 states and 22812 transitions. [2021-12-16 09:02:25,676 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) [2021-12-16 09:02:25,677 INFO L276 IsEmpty]: Start isEmpty. Operand 14389 states and 22812 transitions. [2021-12-16 09:02:25,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-16 09:02:25,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:25,681 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] [2021-12-16 09:02:25,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:25,883 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 [2021-12-16 09:02:25,883 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:02:25,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:25,884 INFO L85 PathProgramCache]: Analyzing trace with hash -127918165, now seen corresponding path program 3 times [2021-12-16 09:02:25,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:25,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011892839] [2021-12-16 09:02:25,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:25,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:25,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 09:02:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:25,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 09:02:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:26,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 09:02:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:26,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 09:02:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 122 proven. 90 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 09:02:26,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:26,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011892839] [2021-12-16 09:02:26,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011892839] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:26,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646360990] [2021-12-16 09:02:26,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 09:02:26,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:26,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:26,070 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) [2021-12-16 09:02:26,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-16 09:02:26,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-16 09:02:26,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:02:26,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-16 09:02:26,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 119 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-16 09:02:26,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-16 09:02:26,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646360990] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:26,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:26,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2021-12-16 09:02:26,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203968248] [2021-12-16 09:02:26,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:26,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 09:02:26,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:26,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 09:02:26,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-12-16 09:02:26,511 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) [2021-12-16 09:02:27,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:27,915 INFO L93 Difference]: Finished difference Result 25356 states and 43274 transitions. [2021-12-16 09:02:27,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-16 09:02:27,915 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 [2021-12-16 09:02:27,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:27,977 INFO L225 Difference]: With dead ends: 25356 [2021-12-16 09:02:27,977 INFO L226 Difference]: Without dead ends: 13111 [2021-12-16 09:02:28,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=989, Invalid=3433, Unknown=0, NotChecked=0, Total=4422 [2021-12-16 09:02:28,043 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 209 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:28,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 145 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 09:02:28,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13111 states. [2021-12-16 09:02:28,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13111 to 11133. [2021-12-16 09:02:28,485 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) [2021-12-16 09:02:28,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11133 states to 11133 states and 15389 transitions. [2021-12-16 09:02:28,519 INFO L78 Accepts]: Start accepts. Automaton has 11133 states and 15389 transitions. Word has length 88 [2021-12-16 09:02:28,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:28,519 INFO L470 AbstractCegarLoop]: Abstraction has 11133 states and 15389 transitions. [2021-12-16 09:02:28,519 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) [2021-12-16 09:02:28,519 INFO L276 IsEmpty]: Start isEmpty. Operand 11133 states and 15389 transitions. [2021-12-16 09:02:28,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-16 09:02:28,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:28,522 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] [2021-12-16 09:02:28,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:28,734 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 [2021-12-16 09:02:28,734 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:02:28,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:28,735 INFO L85 PathProgramCache]: Analyzing trace with hash -635779733, now seen corresponding path program 4 times [2021-12-16 09:02:28,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:28,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55685279] [2021-12-16 09:02:28,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:28,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:28,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 09:02:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:28,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 09:02:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:28,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 09:02:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:28,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 09:02:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:28,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 09:02:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:28,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 09:02:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:28,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-16 09:02:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:28,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 09:02:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 51 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-16 09:02:28,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:28,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55685279] [2021-12-16 09:02:28,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55685279] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:28,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996934882] [2021-12-16 09:02:28,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 09:02:28,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:28,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:28,894 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) [2021-12-16 09:02:28,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-16 09:02:28,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 09:02:28,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:02:28,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-16 09:02:28,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 67 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-16 09:02:29,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 42 proven. 89 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-16 09:02:30,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996934882] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:30,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:30,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2021-12-16 09:02:30,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612977271] [2021-12-16 09:02:30,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:30,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-16 09:02:30,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:30,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-16 09:02:30,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-12-16 09:02:30,229 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) [2021-12-16 09:02:34,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:34,078 INFO L93 Difference]: Finished difference Result 34661 states and 55072 transitions. [2021-12-16 09:02:34,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-12-16 09:02:34,078 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 [2021-12-16 09:02:34,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:34,224 INFO L225 Difference]: With dead ends: 34661 [2021-12-16 09:02:34,224 INFO L226 Difference]: Without dead ends: 33559 [2021-12-16 09:02:34,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12101 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5458, Invalid=27122, Unknown=0, NotChecked=0, Total=32580 [2021-12-16 09:02:34,263 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 217 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 800 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 2360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 800 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:34,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 321 Invalid, 2360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [800 Valid, 1560 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 09:02:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33559 states. [2021-12-16 09:02:35,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33559 to 21083. [2021-12-16 09:02:35,410 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) [2021-12-16 09:02:35,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21083 states to 21083 states and 32799 transitions. [2021-12-16 09:02:35,494 INFO L78 Accepts]: Start accepts. Automaton has 21083 states and 32799 transitions. Word has length 90 [2021-12-16 09:02:35,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:35,495 INFO L470 AbstractCegarLoop]: Abstraction has 21083 states and 32799 transitions. [2021-12-16 09:02:35,495 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) [2021-12-16 09:02:35,495 INFO L276 IsEmpty]: Start isEmpty. Operand 21083 states and 32799 transitions. [2021-12-16 09:02:35,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-16 09:02:35,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:35,500 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:35,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:35,701 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 [2021-12-16 09:02:35,701 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:02:35,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:35,702 INFO L85 PathProgramCache]: Analyzing trace with hash -165426143, now seen corresponding path program 3 times [2021-12-16 09:02:35,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:35,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186217747] [2021-12-16 09:02:35,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:35,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:02:36,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:36,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186217747] [2021-12-16 09:02:36,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186217747] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:36,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559570433] [2021-12-16 09:02:36,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 09:02:36,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:36,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:36,041 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) [2021-12-16 09:02:36,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-16 09:02:36,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-16 09:02:36,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:02:36,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-16 09:02:36,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:02:36,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:02:37,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559570433] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:37,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:37,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2021-12-16 09:02:37,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092556491] [2021-12-16 09:02:37,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:37,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-16 09:02:37,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:37,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-16 09:02:37,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=3036, Unknown=0, NotChecked=0, Total=4032 [2021-12-16 09:02:37,057 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) [2021-12-16 09:02:39,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:39,973 INFO L93 Difference]: Finished difference Result 36172 states and 56287 transitions. [2021-12-16 09:02:39,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-16 09:02:39,974 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 [2021-12-16 09:02:39,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:40,102 INFO L225 Difference]: With dead ends: 36172 [2021-12-16 09:02:40,103 INFO L226 Difference]: Without dead ends: 36171 [2021-12-16 09:02:40,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3484 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4654, Invalid=10352, Unknown=0, NotChecked=0, Total=15006 [2021-12-16 09:02:40,124 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1264 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 705 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:40,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1268 Valid, 1015 Invalid, 1916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [705 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 09:02:40,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36171 states. [2021-12-16 09:02:41,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36171 to 36171. [2021-12-16 09:02:41,721 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) [2021-12-16 09:02:41,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36171 states to 36171 states and 56271 transitions. [2021-12-16 09:02:41,852 INFO L78 Accepts]: Start accepts. Automaton has 36171 states and 56271 transitions. Word has length 124 [2021-12-16 09:02:41,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:41,852 INFO L470 AbstractCegarLoop]: Abstraction has 36171 states and 56271 transitions. [2021-12-16 09:02:41,853 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) [2021-12-16 09:02:41,853 INFO L276 IsEmpty]: Start isEmpty. Operand 36171 states and 56271 transitions. [2021-12-16 09:02:41,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-16 09:02:41,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:41,861 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:41,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:42,079 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 [2021-12-16 09:02:42,080 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-16 09:02:42,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:42,080 INFO L85 PathProgramCache]: Analyzing trace with hash -570444405, now seen corresponding path program 2 times [2021-12-16 09:02:42,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:42,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953609856] [2021-12-16 09:02:42,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:42,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:42,310 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-16 09:02:42,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:42,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953609856] [2021-12-16 09:02:42,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953609856] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:42,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861973536] [2021-12-16 09:02:42,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 09:02:42,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:42,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:42,311 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) [2021-12-16 09:02:42,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-16 09:02:42,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 09:02:42,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:02:42,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-16 09:02:42,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-16 09:02:42,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-16 09:02:43,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861973536] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:43,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:43,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-12-16 09:02:43,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736936794] [2021-12-16 09:02:43,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:43,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-16 09:02:43,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:43,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-16 09:02:43,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2021-12-16 09:02:43,165 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)