./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/Ackermann04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:06:37,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:06:37,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:06:37,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:06:37,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:06:37,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:06:37,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:06:37,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:06:37,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:06:37,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:06:37,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:06:37,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:06:37,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:06:37,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:06:37,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:06:37,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:06:37,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:06:37,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:06:37,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:06:37,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:06:37,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:06:37,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:06:37,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:06:37,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:06:37,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:06:37,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:06:37,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:06:37,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:06:37,341 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:06:37,342 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:06:37,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:06:37,343 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:06:37,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:06:37,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:06:37,345 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:06:37,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:06:37,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:06:37,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:06:37,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:06:37,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:06:37,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:06:37,347 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-12-06 23:06:37,365 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:06:37,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:06:37,365 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:06:37,365 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:06:37,366 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:06:37,366 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:06:37,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:06:37,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:06:37,366 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:06:37,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:06:37,367 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:06:37,367 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 23:06:37,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:06:37,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:06:37,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:06:37,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:06:37,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:06:37,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:06:37,368 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-06 23:06:37,368 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:06:37,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:06:37,368 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:06:37,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:06:37,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:06:37,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:06:37,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:06:37,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:06:37,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:06:37,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:06:37,369 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:06:37,369 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:06:37,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:06:37,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:06:37,370 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:06:37,370 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 [2021-12-06 23:06:37,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:06:37,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:06:37,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:06:37,576 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:06:37,577 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:06:37,578 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/recursive/Ackermann04.c [2021-12-06 23:06:37,622 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/data/8cb4404b8/f526e63e32a24e988860ba3ca5a80433/FLAG3229e7d69 [2021-12-06 23:06:37,992 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:06:37,992 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/sv-benchmarks/c/recursive/Ackermann04.c [2021-12-06 23:06:37,997 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/data/8cb4404b8/f526e63e32a24e988860ba3ca5a80433/FLAG3229e7d69 [2021-12-06 23:06:38,008 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/data/8cb4404b8/f526e63e32a24e988860ba3ca5a80433 [2021-12-06 23:06:38,011 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:06:38,012 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:06:38,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:06:38,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:06:38,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:06:38,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:06:38" (1/1) ... [2021-12-06 23:06:38,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54b72d30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:38, skipping insertion in model container [2021-12-06 23:06:38,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:06:38" (1/1) ... [2021-12-06 23:06:38,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:06:38,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:06:38,138 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2021-12-06 23:06:38,139 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:06:38,145 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:06:38,156 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2021-12-06 23:06:38,157 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:06:38,166 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:06:38,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:38 WrapperNode [2021-12-06 23:06:38,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:06:38,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:06:38,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:06:38,167 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:06:38,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:38" (1/1) ... [2021-12-06 23:06:38,180 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:38" (1/1) ... [2021-12-06 23:06:38,196 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2021-12-06 23:06:38,196 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:06:38,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:06:38,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:06:38,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:06:38,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:38" (1/1) ... [2021-12-06 23:06:38,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:38" (1/1) ... [2021-12-06 23:06:38,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:38" (1/1) ... [2021-12-06 23:06:38,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:38" (1/1) ... [2021-12-06 23:06:38,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:38" (1/1) ... [2021-12-06 23:06:38,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:38" (1/1) ... [2021-12-06 23:06:38,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:38" (1/1) ... [2021-12-06 23:06:38,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:06:38,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:06:38,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:06:38,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:06:38,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:38" (1/1) ... [2021-12-06 23:06:38,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:06:38,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:38,236 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:06:38,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:06:38,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:06:38,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:06:38,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:06:38,276 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2021-12-06 23:06:38,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2021-12-06 23:06:38,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:06:38,326 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:06:38,327 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:06:38,435 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:06:38,439 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:06:38,440 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 23:06:38,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:06:38 BoogieIcfgContainer [2021-12-06 23:06:38,441 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:06:38,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:06:38,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:06:38,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:06:38,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:06:38" (1/3) ... [2021-12-06 23:06:38,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d61fff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:06:38, skipping insertion in model container [2021-12-06 23:06:38,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:38" (2/3) ... [2021-12-06 23:06:38,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d61fff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:06:38, skipping insertion in model container [2021-12-06 23:06:38,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:06:38" (3/3) ... [2021-12-06 23:06:38,448 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2021-12-06 23:06:38,452 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:06:38,452 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-12-06 23:06:38,486 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:06:38,491 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 [2021-12-06 23:06:38,491 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-12-06 23:06:38,504 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) [2021-12-06 23:06:38,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 23:06:38,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:38,508 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:06:38,508 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:06:38,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:38,512 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2021-12-06 23:06:38,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:38,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548711539] [2021-12-06 23:06:38,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:38,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:06:38,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:38,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548711539] [2021-12-06 23:06:38,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548711539] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:06:38,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:06:38,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:06:38,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344794154] [2021-12-06 23:06:38,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:06:38,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:06:38,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:38,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:06:38,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:06:38,676 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) [2021-12-06 23:06:38,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:38,765 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-12-06 23:06:38,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:06:38,767 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 [2021-12-06 23:06:38,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:38,773 INFO L225 Difference]: With dead ends: 73 [2021-12-06 23:06:38,773 INFO L226 Difference]: Without dead ends: 59 [2021-12-06 23:06:38,775 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 [2021-12-06 23:06:38,778 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2021-12-06 23:06:38,779 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] [2021-12-06 23:06:38,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-06 23:06:38,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2021-12-06 23:06:38,808 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) [2021-12-06 23:06:38,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2021-12-06 23:06:38,811 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2021-12-06 23:06:38,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:38,811 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2021-12-06 23:06:38,812 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) [2021-12-06 23:06:38,812 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2021-12-06 23:06:38,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 23:06:38,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:38,812 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:06:38,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:06:38,813 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:06:38,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:38,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2021-12-06 23:06:38,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:38,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137029966] [2021-12-06 23:06:38,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:38,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:06:38,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:38,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137029966] [2021-12-06 23:06:38,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137029966] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:06:38,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:06:38,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:06:38,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808444782] [2021-12-06 23:06:38,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:06:38,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:06:38,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:38,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:06:38,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:06:38,850 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) [2021-12-06 23:06:38,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:38,894 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-12-06 23:06:38,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:06:38,895 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 [2021-12-06 23:06:38,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:38,897 INFO L225 Difference]: With dead ends: 51 [2021-12-06 23:06:38,897 INFO L226 Difference]: Without dead ends: 49 [2021-12-06 23:06:38,897 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 [2021-12-06 23:06:38,899 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 [2021-12-06 23:06:38,900 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] [2021-12-06 23:06:38,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-06 23:06:38,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-06 23:06:38,909 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) [2021-12-06 23:06:38,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2021-12-06 23:06:38,912 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 9 [2021-12-06 23:06:38,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:38,912 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2021-12-06 23:06:38,913 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) [2021-12-06 23:06:38,913 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2021-12-06 23:06:38,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 23:06:38,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:38,914 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:06:38,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:06:38,914 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:06:38,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:38,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2021-12-06 23:06:38,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:38,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560862166] [2021-12-06 23:06:38,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:38,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:06:38,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:38,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560862166] [2021-12-06 23:06:38,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560862166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:06:38,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:06:38,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:06:38,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63801088] [2021-12-06 23:06:38,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:06:38,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:06:38,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:38,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:06:38,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:06:38,958 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) [2021-12-06 23:06:39,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:39,009 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-12-06 23:06:39,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:06:39,009 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 [2021-12-06 23:06:39,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:39,011 INFO L225 Difference]: With dead ends: 76 [2021-12-06 23:06:39,011 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 23:06:39,012 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 [2021-12-06 23:06:39,013 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 [2021-12-06 23:06:39,014 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] [2021-12-06 23:06:39,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 23:06:39,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-12-06 23:06:39,027 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) [2021-12-06 23:06:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2021-12-06 23:06:39,029 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 9 [2021-12-06 23:06:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:39,029 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2021-12-06 23:06:39,029 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) [2021-12-06 23:06:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2021-12-06 23:06:39,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 23:06:39,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:39,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:06:39,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 23:06:39,031 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:06:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:39,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2021-12-06 23:06:39,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:39,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269207994] [2021-12-06 23:06:39,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:39,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:06:39,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:39,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269207994] [2021-12-06 23:06:39,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269207994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:06:39,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:06:39,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:06:39,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889483007] [2021-12-06 23:06:39,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:06:39,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:06:39,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:39,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:06:39,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:06:39,070 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) [2021-12-06 23:06:39,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:39,115 INFO L93 Difference]: Finished difference Result 116 states and 154 transitions. [2021-12-06 23:06:39,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:06:39,115 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 [2021-12-06 23:06:39,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:39,116 INFO L225 Difference]: With dead ends: 116 [2021-12-06 23:06:39,117 INFO L226 Difference]: Without dead ends: 108 [2021-12-06 23:06:39,117 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 [2021-12-06 23:06:39,118 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 [2021-12-06 23:06:39,119 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] [2021-12-06 23:06:39,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-06 23:06:39,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2021-12-06 23:06:39,141 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) [2021-12-06 23:06:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2021-12-06 23:06:39,143 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 10 [2021-12-06 23:06:39,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:39,143 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2021-12-06 23:06:39,143 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) [2021-12-06 23:06:39,143 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2021-12-06 23:06:39,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 23:06:39,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:39,144 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:06:39,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 23:06:39,145 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:06:39,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:39,145 INFO L85 PathProgramCache]: Analyzing trace with hash 219392943, now seen corresponding path program 1 times [2021-12-06 23:06:39,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:39,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511816967] [2021-12-06 23:06:39,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:39,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:06:39,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:39,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511816967] [2021-12-06 23:06:39,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511816967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:06:39,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:06:39,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:06:39,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365960400] [2021-12-06 23:06:39,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:06:39,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:06:39,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:39,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:06:39,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:06:39,180 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) [2021-12-06 23:06:39,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:39,212 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2021-12-06 23:06:39,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:06:39,213 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 [2021-12-06 23:06:39,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:39,214 INFO L225 Difference]: With dead ends: 168 [2021-12-06 23:06:39,214 INFO L226 Difference]: Without dead ends: 97 [2021-12-06 23:06:39,216 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 [2021-12-06 23:06:39,217 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 [2021-12-06 23:06:39,217 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] [2021-12-06 23:06:39,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-06 23:06:39,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-12-06 23:06:39,225 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) [2021-12-06 23:06:39,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2021-12-06 23:06:39,227 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 16 [2021-12-06 23:06:39,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:39,227 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2021-12-06 23:06:39,227 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) [2021-12-06 23:06:39,227 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2021-12-06 23:06:39,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 23:06:39,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:39,228 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:06:39,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 23:06:39,228 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:06:39,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:39,229 INFO L85 PathProgramCache]: Analyzing trace with hash 219399894, now seen corresponding path program 1 times [2021-12-06 23:06:39,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:39,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006216241] [2021-12-06 23:06:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:39,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:39,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:06:39,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:39,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006216241] [2021-12-06 23:06:39,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006216241] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:39,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638908876] [2021-12-06 23:06:39,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:39,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:39,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:39,273 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:39,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:06:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:39,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:06:39,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:06:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:06:39,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:06:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:06:39,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638908876] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:06:39,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:06:39,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-06 23:06:39,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409076426] [2021-12-06 23:06:39,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:06:39,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:06:39,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:39,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:06:39,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:06:39,424 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) [2021-12-06 23:06:39,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:39,596 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2021-12-06 23:06:39,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 23:06:39,597 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 [2021-12-06 23:06:39,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:39,601 INFO L225 Difference]: With dead ends: 274 [2021-12-06 23:06:39,601 INFO L226 Difference]: Without dead ends: 272 [2021-12-06 23:06:39,602 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 [2021-12-06 23:06:39,603 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 250 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:06:39,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 180 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:06:39,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-06 23:06:39,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2021-12-06 23:06:39,636 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) [2021-12-06 23:06:39,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2021-12-06 23:06:39,638 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 16 [2021-12-06 23:06:39,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:39,638 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2021-12-06 23:06:39,639 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) [2021-12-06 23:06:39,639 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2021-12-06 23:06:39,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 23:06:39,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:39,639 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:06:39,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:06:39,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:39,841 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:06:39,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:39,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1162887243, now seen corresponding path program 1 times [2021-12-06 23:06:39,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:39,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11581430] [2021-12-06 23:06:39,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:39,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:40,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:06:40,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:40,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11581430] [2021-12-06 23:06:40,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11581430] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:40,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014224680] [2021-12-06 23:06:40,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:40,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:40,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:40,021 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:40,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:06:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:40,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:06:40,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:06:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:06:40,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:06:40,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014224680] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:06:40,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:06:40,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-12-06 23:06:40,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722941642] [2021-12-06 23:06:40,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:06:40,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:06:40,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:40,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:06:40,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:06:40,136 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:06:40,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:40,200 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2021-12-06 23:06:40,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:06:40,200 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-06 23:06:40,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:40,205 INFO L225 Difference]: With dead ends: 328 [2021-12-06 23:06:40,205 INFO L226 Difference]: Without dead ends: 327 [2021-12-06 23:06:40,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:06:40,207 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 49 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:06:40,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 91 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:06:40,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-06 23:06:40,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2021-12-06 23:06:40,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 227 states have (on average 1.2599118942731278) internal successors, (286), 234 states have internal predecessors, (286), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-06 23:06:40,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2021-12-06 23:06:40,242 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 17 [2021-12-06 23:06:40,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:40,243 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2021-12-06 23:06:40,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:06:40,243 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2021-12-06 23:06:40,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 23:06:40,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:40,244 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:06:40,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:06:40,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 23:06:40,445 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:06:40,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:40,446 INFO L85 PathProgramCache]: Analyzing trace with hash 523262015, now seen corresponding path program 1 times [2021-12-06 23:06:40,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:40,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499417662] [2021-12-06 23:06:40,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:40,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:06:40,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:40,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499417662] [2021-12-06 23:06:40,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499417662] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:40,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090240621] [2021-12-06 23:06:40,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:40,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:40,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:40,516 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:40,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:06:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:40,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:06:40,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:06:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:06:40,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:06:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:06:40,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090240621] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:06:40,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:06:40,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-06 23:06:40,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103540167] [2021-12-06 23:06:40,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:06:40,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:06:40,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:40,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:06:40,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:06:40,627 INFO L87 Difference]: Start difference. First operand 293 states and 373 transitions. Second operand has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:06:40,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:40,767 INFO L93 Difference]: Finished difference Result 591 states and 792 transitions. [2021-12-06 23:06:40,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 23:06:40,768 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 23:06:40,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:40,771 INFO L225 Difference]: With dead ends: 591 [2021-12-06 23:06:40,772 INFO L226 Difference]: Without dead ends: 590 [2021-12-06 23:06:40,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:06:40,773 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 167 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:06:40,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 237 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:06:40,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-12-06 23:06:40,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 521. [2021-12-06 23:06:40,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 407 states have (on average 1.203931203931204) internal successors, (490), 414 states have internal predecessors, (490), 81 states have call successors, (81), 28 states have call predecessors, (81), 27 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2021-12-06 23:06:40,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2021-12-06 23:06:40,808 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 20 [2021-12-06 23:06:40,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:40,809 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2021-12-06 23:06:40,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:06:40,809 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2021-12-06 23:06:40,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 23:06:40,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:40,810 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] [2021-12-06 23:06:40,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:06:41,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 23:06:41,011 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:06:41,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:41,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2021-12-06 23:06:41,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:41,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781761196] [2021-12-06 23:06:41,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:41,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:41,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:06:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:06:41,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:41,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781761196] [2021-12-06 23:06:41,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781761196] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:41,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734555372] [2021-12-06 23:06:41,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:41,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:41,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:41,064 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:41,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:06:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:41,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 23:06:41,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:06:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:06:41,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:06:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:06:41,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734555372] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:06:41,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:06:41,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-12-06 23:06:41,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728375507] [2021-12-06 23:06:41,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:06:41,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 23:06:41,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:41,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 23:06:41,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:06:41,236 INFO L87 Difference]: Start difference. First operand 521 states and 649 transitions. Second operand has 15 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:06:41,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:41,444 INFO L93 Difference]: Finished difference Result 870 states and 1257 transitions. [2021-12-06 23:06:41,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 23:06:41,444 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-12-06 23:06:41,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:41,450 INFO L225 Difference]: With dead ends: 870 [2021-12-06 23:06:41,450 INFO L226 Difference]: Without dead ends: 868 [2021-12-06 23:06:41,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2021-12-06 23:06:41,451 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 178 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:06:41,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 140 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:06:41,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-12-06 23:06:41,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 728. [2021-12-06 23:06:41,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 542 states have (on average 1.2011070110701108) internal successors, (651), 572 states have internal predecessors, (651), 123 states have call successors, (123), 35 states have call predecessors, (123), 57 states have return successors, (215), 120 states have call predecessors, (215), 119 states have call successors, (215) [2021-12-06 23:06:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 989 transitions. [2021-12-06 23:06:41,494 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 989 transitions. Word has length 24 [2021-12-06 23:06:41,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:41,495 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 989 transitions. [2021-12-06 23:06:41,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:06:41,495 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 989 transitions. [2021-12-06 23:06:41,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 23:06:41,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:41,496 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:06:41,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:06:41,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:41,697 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:06:41,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:41,698 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2021-12-06 23:06:41,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:41,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256924151] [2021-12-06 23:06:41,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:41,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:41,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:06:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:06:41,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:41,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256924151] [2021-12-06 23:06:41,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256924151] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:41,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174639421] [2021-12-06 23:06:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:41,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:41,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:41,776 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:41,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:06:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:41,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:06:41,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:06:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:06:41,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:06:41,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174639421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:06:41,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:06:41,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-06 23:06:41,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842847951] [2021-12-06 23:06:41,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:06:41,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:06:41,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:41,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:06:41,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:06:41,895 INFO L87 Difference]: Start difference. First operand 728 states and 989 transitions. Second operand has 5 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 23:06:41,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:41,962 INFO L93 Difference]: Finished difference Result 737 states and 999 transitions. [2021-12-06 23:06:41,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:06:41,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-06 23:06:41,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:41,968 INFO L225 Difference]: With dead ends: 737 [2021-12-06 23:06:41,969 INFO L226 Difference]: Without dead ends: 736 [2021-12-06 23:06:41,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:06:41,970 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 41 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:06:41,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 111 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:06:41,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-12-06 23:06:42,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 727. [2021-12-06 23:06:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 542 states have (on average 1.1863468634686347) internal successors, (643), 571 states have internal predecessors, (643), 123 states have call successors, (123), 35 states have call predecessors, (123), 57 states have return successors, (215), 120 states have call predecessors, (215), 119 states have call successors, (215) [2021-12-06 23:06:42,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 981 transitions. [2021-12-06 23:06:42,010 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 981 transitions. Word has length 25 [2021-12-06 23:06:42,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:42,010 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 981 transitions. [2021-12-06 23:06:42,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 23:06:42,010 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 981 transitions. [2021-12-06 23:06:42,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 23:06:42,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:42,012 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] [2021-12-06 23:06:42,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 23:06:42,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:42,213 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:06:42,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:42,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1583952330, now seen corresponding path program 1 times [2021-12-06 23:06:42,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:42,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368998745] [2021-12-06 23:06:42,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:42,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:42,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:06:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 23:06:42,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:42,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368998745] [2021-12-06 23:06:42,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368998745] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:42,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801463347] [2021-12-06 23:06:42,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:42,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:42,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:42,371 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:42,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:06:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:42,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 23:06:42,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:06:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:06:42,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:06:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:06:42,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801463347] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:42,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:06:42,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2021-12-06 23:06:42,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277595747] [2021-12-06 23:06:42,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:06:42,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:06:42,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:42,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:06:42,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:06:42,517 INFO L87 Difference]: Start difference. First operand 727 states and 981 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 23:06:42,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:42,669 INFO L93 Difference]: Finished difference Result 886 states and 1251 transitions. [2021-12-06 23:06:42,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:06:42,669 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-12-06 23:06:42,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:42,676 INFO L225 Difference]: With dead ends: 886 [2021-12-06 23:06:42,676 INFO L226 Difference]: Without dead ends: 885 [2021-12-06 23:06:42,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:06:42,678 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 52 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:06:42,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 119 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:06:42,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-12-06 23:06:42,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 812. [2021-12-06 23:06:42,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 602 states have (on average 1.1843853820598007) internal successors, (713), 633 states have internal predecessors, (713), 143 states have call successors, (143), 38 states have call predecessors, (143), 62 states have return successors, (220), 140 states have call predecessors, (220), 139 states have call successors, (220) [2021-12-06 23:06:42,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1076 transitions. [2021-12-06 23:06:42,719 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1076 transitions. Word has length 28 [2021-12-06 23:06:42,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:42,719 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1076 transitions. [2021-12-06 23:06:42,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 23:06:42,719 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1076 transitions. [2021-12-06 23:06:42,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 23:06:42,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:42,721 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] [2021-12-06 23:06:42,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 23:06:42,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 23:06:42,922 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:06:42,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:42,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1777813581, now seen corresponding path program 1 times [2021-12-06 23:06:42,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:42,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052906165] [2021-12-06 23:06:42,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:42,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:42,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:06:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:42,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:06:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:06:42,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:42,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052906165] [2021-12-06 23:06:42,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052906165] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:42,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709770981] [2021-12-06 23:06:42,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:42,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:42,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:42,989 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:42,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 23:06:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:43,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 23:06:43,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:06:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:06:43,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:06:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:06:43,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709770981] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:06:43,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:06:43,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-12-06 23:06:43,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342782003] [2021-12-06 23:06:43,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:06:43,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 23:06:43,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:43,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 23:06:43,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-06 23:06:43,199 INFO L87 Difference]: Start difference. First operand 812 states and 1076 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 23:06:43,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:43,555 INFO L93 Difference]: Finished difference Result 1503 states and 2506 transitions. [2021-12-06 23:06:43,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:06:43,555 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 [2021-12-06 23:06:43,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:43,565 INFO L225 Difference]: With dead ends: 1503 [2021-12-06 23:06:43,565 INFO L226 Difference]: Without dead ends: 1501 [2021-12-06 23:06:43,566 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 [2021-12-06 23:06:43,567 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 146 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:06:43,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 172 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:06:43,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2021-12-06 23:06:43,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1258. [2021-12-06 23:06:43,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 902 states have (on average 1.1696230598669624) internal successors, (1055), 947 states have internal predecessors, (1055), 241 states have call successors, (241), 53 states have call predecessors, (241), 110 states have return successors, (548), 257 states have call predecessors, (548), 236 states have call successors, (548) [2021-12-06 23:06:43,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1844 transitions. [2021-12-06 23:06:43,642 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1844 transitions. Word has length 33 [2021-12-06 23:06:43,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:43,642 INFO L470 AbstractCegarLoop]: Abstraction has 1258 states and 1844 transitions. [2021-12-06 23:06:43,642 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) [2021-12-06 23:06:43,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1844 transitions. [2021-12-06 23:06:43,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 23:06:43,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:43,644 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:06:43,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 23:06:43,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:43,844 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:06:43,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:43,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1227703372, now seen corresponding path program 2 times [2021-12-06 23:06:43,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:43,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901712891] [2021-12-06 23:06:43,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:43,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:43,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:06:43,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 23:06:43,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:43,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901712891] [2021-12-06 23:06:43,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901712891] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:43,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143689973] [2021-12-06 23:06:43,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:06:43,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:43,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:43,912 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:43,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 23:06:43,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:06:43,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:06:43,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 23:06:43,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:06:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 23:06:43,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:06:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 23:06:44,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143689973] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:06:44,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:06:44,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-12-06 23:06:44,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498497963] [2021-12-06 23:06:44,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:06:44,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 23:06:44,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:44,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 23:06:44,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:06:44,107 INFO L87 Difference]: Start difference. First operand 1258 states and 1844 transitions. Second operand has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:06:44,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:44,486 INFO L93 Difference]: Finished difference Result 2355 states and 3821 transitions. [2021-12-06 23:06:44,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 23:06:44,486 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2021-12-06 23:06:44,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:44,508 INFO L225 Difference]: With dead ends: 2355 [2021-12-06 23:06:44,508 INFO L226 Difference]: Without dead ends: 2338 [2021-12-06 23:06:44,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=323, Invalid=1009, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 23:06:44,511 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 266 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:06:44,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 162 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:06:44,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2021-12-06 23:06:44,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 1753. [2021-12-06 23:06:44,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1280 states have (on average 1.16484375) internal successors, (1491), 1338 states have internal predecessors, (1491), 308 states have call successors, (308), 82 states have call predecessors, (308), 160 states have return successors, (829), 332 states have call predecessors, (829), 300 states have call successors, (829) [2021-12-06 23:06:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2628 transitions. [2021-12-06 23:06:44,627 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2628 transitions. Word has length 36 [2021-12-06 23:06:44,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:44,628 INFO L470 AbstractCegarLoop]: Abstraction has 1753 states and 2628 transitions. [2021-12-06 23:06:44,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:06:44,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2628 transitions. [2021-12-06 23:06:44,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 23:06:44,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:44,629 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] [2021-12-06 23:06:44,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 23:06:44,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:44,830 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:06:44,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:44,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1699542727, now seen corresponding path program 1 times [2021-12-06 23:06:44,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:44,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267609368] [2021-12-06 23:06:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:44,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:44,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:06:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:44,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:06:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:44,887 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:06:44,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:44,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267609368] [2021-12-06 23:06:44,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267609368] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:44,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469980774] [2021-12-06 23:06:44,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:44,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:44,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:44,889 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:44,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 23:06:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:44,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 23:06:44,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:06:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:06:44,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:06:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:06:45,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469980774] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:45,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:06:45,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2021-12-06 23:06:45,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046704326] [2021-12-06 23:06:45,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:06:45,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:06:45,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:45,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:06:45,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-12-06 23:06:45,073 INFO L87 Difference]: Start difference. First operand 1753 states and 2628 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:06:45,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:45,256 INFO L93 Difference]: Finished difference Result 1910 states and 3114 transitions. [2021-12-06 23:06:45,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 23:06:45,257 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 [2021-12-06 23:06:45,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:45,268 INFO L225 Difference]: With dead ends: 1910 [2021-12-06 23:06:45,268 INFO L226 Difference]: Without dead ends: 1909 [2021-12-06 23:06:45,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-12-06 23:06:45,270 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:06:45,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 158 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:06:45,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2021-12-06 23:06:45,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1734. [2021-12-06 23:06:45,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1271 states have (on average 1.163650668764752) internal successors, (1479), 1329 states have internal predecessors, (1479), 305 states have call successors, (305), 82 states have call predecessors, (305), 153 states have return successors, (696), 322 states have call predecessors, (696), 297 states have call successors, (696) [2021-12-06 23:06:45,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2480 transitions. [2021-12-06 23:06:45,353 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2480 transitions. Word has length 37 [2021-12-06 23:06:45,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:45,353 INFO L470 AbstractCegarLoop]: Abstraction has 1734 states and 2480 transitions. [2021-12-06 23:06:45,354 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) [2021-12-06 23:06:45,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2480 transitions. [2021-12-06 23:06:45,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 23:06:45,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:45,356 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:06:45,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 23:06:45,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:45,557 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:06:45,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:45,558 INFO L85 PathProgramCache]: Analyzing trace with hash 865218898, now seen corresponding path program 1 times [2021-12-06 23:06:45,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:45,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039785545] [2021-12-06 23:06:45,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:45,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:45,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:45,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:06:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:45,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:06:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:45,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:06:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:45,705 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 23:06:45,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:45,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039785545] [2021-12-06 23:06:45,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039785545] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:45,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128132548] [2021-12-06 23:06:45,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:45,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:45,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:45,708 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:45,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 23:06:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:45,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:06:45,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:06:45,802 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 23:06:45,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:06:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 23:06:45,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128132548] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:06:45,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:06:45,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2021-12-06 23:06:45,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354697841] [2021-12-06 23:06:45,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:06:45,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:06:45,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:45,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:06:45,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:06:45,890 INFO L87 Difference]: Start difference. First operand 1734 states and 2480 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 23:06:45,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:45,979 INFO L93 Difference]: Finished difference Result 2467 states and 3685 transitions. [2021-12-06 23:06:45,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:06:45,980 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 43 [2021-12-06 23:06:45,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:45,985 INFO L225 Difference]: With dead ends: 2467 [2021-12-06 23:06:45,985 INFO L226 Difference]: Without dead ends: 869 [2021-12-06 23:06:45,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:06:45,996 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 53 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:06:45,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 107 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:06:45,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-12-06 23:06:46,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 850. [2021-12-06 23:06:46,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 633 states have (on average 1.1342812006319116) internal successors, (718), 653 states have internal predecessors, (718), 153 states have call successors, (153), 46 states have call predecessors, (153), 60 states have return successors, (244), 150 states have call predecessors, (244), 149 states have call successors, (244) [2021-12-06 23:06:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1115 transitions. [2021-12-06 23:06:46,040 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1115 transitions. Word has length 43 [2021-12-06 23:06:46,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:46,041 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 1115 transitions. [2021-12-06 23:06:46,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 23:06:46,041 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1115 transitions. [2021-12-06 23:06:46,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 23:06:46,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:46,042 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-06 23:06:46,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 23:06:46,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 23:06:46,243 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:06:46,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:46,244 INFO L85 PathProgramCache]: Analyzing trace with hash -151680771, now seen corresponding path program 2 times [2021-12-06 23:06:46,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:46,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227943148] [2021-12-06 23:06:46,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:46,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:06:46,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:46,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227943148] [2021-12-06 23:06:46,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227943148] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:46,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464617964] [2021-12-06 23:06:46,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:06:46,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:46,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:46,307 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:46,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 23:06:46,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:06:46,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:06:46,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 23:06:46,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:06:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:06:46,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:06:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:06:46,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464617964] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:06:46,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:06:46,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-12-06 23:06:46,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824585871] [2021-12-06 23:06:46,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:06:46,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 23:06:46,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:46,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 23:06:46,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-12-06 23:06:46,515 INFO L87 Difference]: Start difference. First operand 850 states and 1115 transitions. Second operand has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:06:46,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:46,798 INFO L93 Difference]: Finished difference Result 1623 states and 2347 transitions. [2021-12-06 23:06:46,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 23:06:46,798 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-06 23:06:46,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:46,806 INFO L225 Difference]: With dead ends: 1623 [2021-12-06 23:06:46,807 INFO L226 Difference]: Without dead ends: 1622 [2021-12-06 23:06:46,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 23:06:46,808 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 419 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:06:46,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 379 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:06:46,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-12-06 23:06:46,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1510. [2021-12-06 23:06:46,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1125 states have (on average 1.1075555555555556) internal successors, (1246), 1157 states have internal predecessors, (1246), 273 states have call successors, (273), 82 states have call predecessors, (273), 108 states have return successors, (436), 270 states have call predecessors, (436), 269 states have call successors, (436) [2021-12-06 23:06:46,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 1955 transitions. [2021-12-06 23:06:46,889 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 1955 transitions. Word has length 44 [2021-12-06 23:06:46,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:46,889 INFO L470 AbstractCegarLoop]: Abstraction has 1510 states and 1955 transitions. [2021-12-06 23:06:46,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:06:46,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 1955 transitions. [2021-12-06 23:06:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 23:06:46,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:46,891 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] [2021-12-06 23:06:46,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 23:06:47,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 23:06:47,092 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:06:47,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:47,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1560392739, now seen corresponding path program 2 times [2021-12-06 23:06:47,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:47,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604299297] [2021-12-06 23:06:47,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:47,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:47,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:06:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:47,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:06:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:06:47,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:47,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604299297] [2021-12-06 23:06:47,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604299297] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:47,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136329932] [2021-12-06 23:06:47,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:06:47,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:47,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:47,165 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:47,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 23:06:47,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:06:47,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:06:47,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 23:06:47,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:06:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:06:47,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:06:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:06:47,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136329932] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:06:47,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:06:47,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2021-12-06 23:06:47,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29676354] [2021-12-06 23:06:47,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:06:47,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 23:06:47,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:47,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 23:06:47,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-12-06 23:06:47,401 INFO L87 Difference]: Start difference. First operand 1510 states and 1955 transitions. Second operand has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 23:06:48,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:48,037 INFO L93 Difference]: Finished difference Result 3056 states and 4731 transitions. [2021-12-06 23:06:48,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 23:06:48,038 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 [2021-12-06 23:06:48,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:48,049 INFO L225 Difference]: With dead ends: 3056 [2021-12-06 23:06:48,049 INFO L226 Difference]: Without dead ends: 2163 [2021-12-06 23:06:48,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=508, Invalid=1748, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 23:06:48,055 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 203 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:06:48,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 298 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:06:48,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-12-06 23:06:48,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1621. [2021-12-06 23:06:48,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1208 states have (on average 1.1018211920529801) internal successors, (1331), 1240 states have internal predecessors, (1331), 292 states have call successors, (292), 91 states have call predecessors, (292), 117 states have return successors, (461), 289 states have call predecessors, (461), 288 states have call successors, (461) [2021-12-06 23:06:48,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2084 transitions. [2021-12-06 23:06:48,151 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2084 transitions. Word has length 45 [2021-12-06 23:06:48,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:48,151 INFO L470 AbstractCegarLoop]: Abstraction has 1621 states and 2084 transitions. [2021-12-06 23:06:48,151 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) [2021-12-06 23:06:48,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2084 transitions. [2021-12-06 23:06:48,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 23:06:48,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:48,154 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] [2021-12-06 23:06:48,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 23:06:48,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 23:06:48,354 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:06:48,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:48,355 INFO L85 PathProgramCache]: Analyzing trace with hash 442862615, now seen corresponding path program 1 times [2021-12-06 23:06:48,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:48,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729686728] [2021-12-06 23:06:48,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:48,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:48,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:06:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:48,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:06:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:48,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:06:48,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:48,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:06:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 23:06:48,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:48,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729686728] [2021-12-06 23:06:48,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729686728] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:48,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401057551] [2021-12-06 23:06:48,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:48,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:48,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:48,451 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:48,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 23:06:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:48,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 23:06:48,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:06:48,528 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 23:06:48,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:06:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 23:06:48,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401057551] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:06:48,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:06:48,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2021-12-06 23:06:48,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64194907] [2021-12-06 23:06:48,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:06:48,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 23:06:48,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:48,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 23:06:48,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-12-06 23:06:48,798 INFO L87 Difference]: Start difference. First operand 1621 states and 2084 transitions. Second operand has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-06 23:06:49,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:49,616 INFO L93 Difference]: Finished difference Result 4064 states and 7465 transitions. [2021-12-06 23:06:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-06 23:06:49,617 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 [2021-12-06 23:06:49,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:49,642 INFO L225 Difference]: With dead ends: 4064 [2021-12-06 23:06:49,642 INFO L226 Difference]: Without dead ends: 4060 [2021-12-06 23:06:49,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1682 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1158, Invalid=5004, Unknown=0, NotChecked=0, Total=6162 [2021-12-06 23:06:49,647 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 145 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:06:49,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 246 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:06:49,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4060 states. [2021-12-06 23:06:49,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4060 to 2916. [2021-12-06 23:06:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2015 states have (on average 1.078908188585608) internal successors, (2174), 2047 states have internal predecessors, (2174), 557 states have call successors, (557), 105 states have call predecessors, (557), 340 states have return successors, (3218), 763 states have call predecessors, (3218), 551 states have call successors, (3218) [2021-12-06 23:06:49,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 5949 transitions. [2021-12-06 23:06:49,835 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 5949 transitions. Word has length 52 [2021-12-06 23:06:49,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:49,835 INFO L470 AbstractCegarLoop]: Abstraction has 2916 states and 5949 transitions. [2021-12-06 23:06:49,835 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) [2021-12-06 23:06:49,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 5949 transitions. [2021-12-06 23:06:49,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 23:06:49,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:49,837 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 23:06:49,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 23:06:50,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 23:06:50,039 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:06:50,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:50,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1991697283, now seen corresponding path program 1 times [2021-12-06 23:06:50,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:50,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703759649] [2021-12-06 23:06:50,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:50,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:06:50,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:50,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703759649] [2021-12-06 23:06:50,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703759649] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:50,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521417323] [2021-12-06 23:06:50,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:50,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:50,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:50,258 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:50,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 23:06:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:50,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 23:06:50,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:06:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:06:50,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:06:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:06:50,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521417323] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:06:50,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:06:50,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-12-06 23:06:50,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496006997] [2021-12-06 23:06:50,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:06:50,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 23:06:50,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:50,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 23:06:50,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-12-06 23:06:50,462 INFO L87 Difference]: Start difference. First operand 2916 states and 5949 transitions. Second operand has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:06:51,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:51,037 INFO L93 Difference]: Finished difference Result 7961 states and 16550 transitions. [2021-12-06 23:06:51,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 23:06:51,038 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 [2021-12-06 23:06:51,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:51,093 INFO L225 Difference]: With dead ends: 7961 [2021-12-06 23:06:51,094 INFO L226 Difference]: Without dead ends: 7960 [2021-12-06 23:06:51,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 23:06:51,097 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 891 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:06:51,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 323 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:06:51,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7960 states. [2021-12-06 23:06:51,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7960 to 7884. [2021-12-06 23:06:51,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7884 states, 5489 states have (on average 1.0814355984696666) internal successors, (5936), 5593 states have internal predecessors, (5936), 1505 states have call successors, (1505), 303 states have call predecessors, (1505), 886 states have return successors, (8678), 1987 states have call predecessors, (8678), 1499 states have call successors, (8678) [2021-12-06 23:06:51,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7884 states to 7884 states and 16119 transitions. [2021-12-06 23:06:51,629 INFO L78 Accepts]: Start accepts. Automaton has 7884 states and 16119 transitions. Word has length 58 [2021-12-06 23:06:51,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:51,629 INFO L470 AbstractCegarLoop]: Abstraction has 7884 states and 16119 transitions. [2021-12-06 23:06:51,629 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) [2021-12-06 23:06:51,629 INFO L276 IsEmpty]: Start isEmpty. Operand 7884 states and 16119 transitions. [2021-12-06 23:06:51,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 23:06:51,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:51,631 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] [2021-12-06 23:06:51,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 23:06:51,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:51,833 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:06:51,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:51,834 INFO L85 PathProgramCache]: Analyzing trace with hash 526800899, now seen corresponding path program 1 times [2021-12-06 23:06:51,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:51,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985515359] [2021-12-06 23:06:51,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:51,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:51,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:06:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:51,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:06:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:51,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:06:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:52,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:06:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 23:06:52,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:52,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985515359] [2021-12-06 23:06:52,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985515359] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:52,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542512651] [2021-12-06 23:06:52,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:52,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:52,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:52,016 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:52,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 23:06:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:52,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 23:06:52,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:06:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 23:06:52,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:06:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 23:06:52,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542512651] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:06:52,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:06:52,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2021-12-06 23:06:52,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854293230] [2021-12-06 23:06:52,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:06:52,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 23:06:52,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:52,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 23:06:52,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-12-06 23:06:52,371 INFO L87 Difference]: Start difference. First operand 7884 states and 16119 transitions. Second operand has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-06 23:06:54,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:54,429 INFO L93 Difference]: Finished difference Result 29449 states and 111079 transitions. [2021-12-06 23:06:54,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 23:06:54,430 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 [2021-12-06 23:06:54,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:54,683 INFO L225 Difference]: With dead ends: 29449 [2021-12-06 23:06:54,683 INFO L226 Difference]: Without dead ends: 22920 [2021-12-06 23:06:54,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1251, Invalid=4755, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 23:06:54,777 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 106 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:06:54,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 297 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:06:54,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22920 states. [2021-12-06 23:06:56,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22920 to 16604. [2021-12-06 23:06:56,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16604 states, 10900 states have (on average 1.0543119266055045) internal successors, (11492), 10965 states have internal predecessors, (11492), 3293 states have call successors, (3293), 380 states have call predecessors, (3293), 2407 states have return successors, (45164), 5258 states have call predecessors, (45164), 3282 states have call successors, (45164) [2021-12-06 23:06:56,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16604 states to 16604 states and 59949 transitions. [2021-12-06 23:06:56,660 INFO L78 Accepts]: Start accepts. Automaton has 16604 states and 59949 transitions. Word has length 56 [2021-12-06 23:06:56,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:56,661 INFO L470 AbstractCegarLoop]: Abstraction has 16604 states and 59949 transitions. [2021-12-06 23:06:56,661 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) [2021-12-06 23:06:56,661 INFO L276 IsEmpty]: Start isEmpty. Operand 16604 states and 59949 transitions. [2021-12-06 23:06:56,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 23:06:56,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:56,664 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:06:56,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-06 23:06:56,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-12-06 23:06:56,865 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:06:56,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:56,867 INFO L85 PathProgramCache]: Analyzing trace with hash 55857866, now seen corresponding path program 2 times [2021-12-06 23:06:56,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:56,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604883677] [2021-12-06 23:06:56,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:56,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:56,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:06:56,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:56,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:06:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:56,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:06:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:56,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:06:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:57,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:06:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 23:06:57,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:57,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604883677] [2021-12-06 23:06:57,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604883677] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:57,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911309934] [2021-12-06 23:06:57,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:06:57,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:57,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:57,019 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:57,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 23:06:57,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:06:57,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:06:57,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 23:06:57,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:06:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 23 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-06 23:06:57,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:06:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 80 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 23:06:57,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911309934] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:06:57,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:06:57,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2021-12-06 23:06:57,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297338867] [2021-12-06 23:06:57,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:06:57,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 23:06:57,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:57,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 23:06:57,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 23:06:57,529 INFO L87 Difference]: Start difference. First operand 16604 states and 59949 transitions. Second operand has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 23:06:58,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:58,779 INFO L93 Difference]: Finished difference Result 25458 states and 94365 transitions. [2021-12-06 23:06:58,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 23:06:58,780 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 73 [2021-12-06 23:06:58,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:58,830 INFO L225 Difference]: With dead ends: 25458 [2021-12-06 23:06:58,830 INFO L226 Difference]: Without dead ends: 10209 [2021-12-06 23:06:58,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=673, Invalid=2633, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 23:06:58,971 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 182 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:06:58,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 283 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:06:58,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10209 states. [2021-12-06 23:06:59,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10209 to 9706. [2021-12-06 23:06:59,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9706 states, 6743 states have (on average 1.0793415393741659) internal successors, (7278), 6950 states have internal predecessors, (7278), 1900 states have call successors, (1900), 404 states have call predecessors, (1900), 1059 states have return successors, (6461), 2351 states have call predecessors, (6461), 1892 states have call successors, (6461) [2021-12-06 23:06:59,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9706 states to 9706 states and 15639 transitions. [2021-12-06 23:06:59,600 INFO L78 Accepts]: Start accepts. Automaton has 9706 states and 15639 transitions. Word has length 73 [2021-12-06 23:06:59,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:59,600 INFO L470 AbstractCegarLoop]: Abstraction has 9706 states and 15639 transitions. [2021-12-06 23:06:59,600 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) [2021-12-06 23:06:59,601 INFO L276 IsEmpty]: Start isEmpty. Operand 9706 states and 15639 transitions. [2021-12-06 23:06:59,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 23:06:59,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:59,604 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] [2021-12-06 23:06:59,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 23:06:59,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 23:06:59,804 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:06:59,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:59,805 INFO L85 PathProgramCache]: Analyzing trace with hash -131434271, now seen corresponding path program 3 times [2021-12-06 23:06:59,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:59,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354013594] [2021-12-06 23:06:59,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:59,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:59,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:59,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:06:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:59,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:06:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:06:59,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:59,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354013594] [2021-12-06 23:06:59,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354013594] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:59,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446562305] [2021-12-06 23:06:59,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:06:59,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:59,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:59,894 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:59,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 23:06:59,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-06 23:06:59,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:06:59,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 23:06:59,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:07:00,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:07:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 65 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:07:00,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446562305] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:07:00,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:07:00,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2021-12-06 23:07:00,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960514402] [2021-12-06 23:07:00,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:07:00,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 23:07:00,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:00,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 23:07:00,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 23:07:00,280 INFO L87 Difference]: Start difference. First operand 9706 states and 15639 transitions. Second operand has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 23:07:01,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:01,108 INFO L93 Difference]: Finished difference Result 10357 states and 16637 transitions. [2021-12-06 23:07:01,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 23:07:01,109 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 [2021-12-06 23:07:01,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:01,149 INFO L225 Difference]: With dead ends: 10357 [2021-12-06 23:07:01,149 INFO L226 Difference]: Without dead ends: 10356 [2021-12-06 23:07:01,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=577, Invalid=1973, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 23:07:01,155 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 203 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:01,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 249 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:07:01,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10356 states. [2021-12-06 23:07:01,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10356 to 9814. [2021-12-06 23:07:01,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9814 states, 6815 states have (on average 1.074688187820983) internal successors, (7324), 7022 states have internal predecessors, (7324), 1900 states have call successors, (1900), 404 states have call predecessors, (1900), 1095 states have return successors, (6555), 2387 states have call predecessors, (6555), 1892 states have call successors, (6555) [2021-12-06 23:07:01,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9814 states to 9814 states and 15779 transitions. [2021-12-06 23:07:01,729 INFO L78 Accepts]: Start accepts. Automaton has 9814 states and 15779 transitions. Word has length 69 [2021-12-06 23:07:01,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:01,729 INFO L470 AbstractCegarLoop]: Abstraction has 9814 states and 15779 transitions. [2021-12-06 23:07:01,729 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) [2021-12-06 23:07:01,730 INFO L276 IsEmpty]: Start isEmpty. Operand 9814 states and 15779 transitions. [2021-12-06 23:07:01,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-06 23:07:01,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:01,733 INFO L514 BasicCegarLoop]: trace histogram [10, 7, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:01,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 23:07:01,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 23:07:01,933 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:07:01,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:01,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1597804450, now seen corresponding path program 2 times [2021-12-06 23:07:01,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:01,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673833128] [2021-12-06 23:07:01,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:01,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:01,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 23:07:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:01,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:07:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:01,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:01,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:02,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:07:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:02,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:07:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:02,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:07:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-06 23:07:02,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:02,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673833128] [2021-12-06 23:07:02,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673833128] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:07:02,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631345028] [2021-12-06 23:07:02,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:07:02,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:02,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:02,012 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:07:02,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 23:07:02,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:07:02,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:07:02,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 23:07:02,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:02,136 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 100 proven. 15 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-06 23:07:02,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:07:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 100 proven. 26 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-06 23:07:02,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631345028] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:07:02,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:07:02,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2021-12-06 23:07:02,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83783340] [2021-12-06 23:07:02,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:07:02,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 23:07:02,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:02,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 23:07:02,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:07:02,368 INFO L87 Difference]: Start difference. First operand 9814 states and 15779 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-06 23:07:02,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:02,817 INFO L93 Difference]: Finished difference Result 18932 states and 34355 transitions. [2021-12-06 23:07:02,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:07:02,818 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) Word has length 88 [2021-12-06 23:07:02,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:02,861 INFO L225 Difference]: With dead ends: 18932 [2021-12-06 23:07:02,861 INFO L226 Difference]: Without dead ends: 10758 [2021-12-06 23:07:02,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-12-06 23:07:02,907 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 73 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:02,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 77 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:07:02,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10758 states. [2021-12-06 23:07:03,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10758 to 9808. [2021-12-06 23:07:03,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9808 states, 6812 states have (on average 1.0747210804462712) internal successors, (7321), 7019 states have internal predecessors, (7321), 1897 states have call successors, (1897), 404 states have call predecessors, (1897), 1095 states have return successors, (6475), 2384 states have call predecessors, (6475), 1862 states have call successors, (6475) [2021-12-06 23:07:03,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9808 states to 9808 states and 15693 transitions. [2021-12-06 23:07:03,516 INFO L78 Accepts]: Start accepts. Automaton has 9808 states and 15693 transitions. Word has length 88 [2021-12-06 23:07:03,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:03,516 INFO L470 AbstractCegarLoop]: Abstraction has 9808 states and 15693 transitions. [2021-12-06 23:07:03,516 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) [2021-12-06 23:07:03,516 INFO L276 IsEmpty]: Start isEmpty. Operand 9808 states and 15693 transitions. [2021-12-06 23:07:03,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 23:07:03,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:03,520 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] [2021-12-06 23:07:03,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 23:07:03,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 23:07:03,720 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:07:03,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:03,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1897499616, now seen corresponding path program 3 times [2021-12-06 23:07:03,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:03,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647027349] [2021-12-06 23:07:03,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:03,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:03,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:07:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:03,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:03,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:03,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:07:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:03,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:03,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:07:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:03,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:07:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:03,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:07:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:03,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 23:07:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 113 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-06 23:07:03,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:03,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647027349] [2021-12-06 23:07:03,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647027349] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:07:03,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729555501] [2021-12-06 23:07:03,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:07:03,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:03,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:03,849 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:07:03,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 23:07:03,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 23:07:03,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:07:03,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 23:07:03,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 150 proven. 26 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-06 23:07:04,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:07:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 119 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-06 23:07:04,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729555501] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:07:04,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:07:04,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2021-12-06 23:07:04,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038927652] [2021-12-06 23:07:04,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:07:04,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 23:07:04,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:04,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 23:07:04,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-12-06 23:07:04,468 INFO L87 Difference]: Start difference. First operand 9808 states and 15693 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2021-12-06 23:07:05,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:05,066 INFO L93 Difference]: Finished difference Result 20497 states and 41620 transitions. [2021-12-06 23:07:05,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:07:05,067 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 [2021-12-06 23:07:05,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:05,119 INFO L225 Difference]: With dead ends: 20497 [2021-12-06 23:07:05,119 INFO L226 Difference]: Without dead ends: 12358 [2021-12-06 23:07:05,161 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 [2021-12-06 23:07:05,162 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 67 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:05,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 175 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:07:05,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12358 states. [2021-12-06 23:07:05,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12358 to 11997. [2021-12-06 23:07:05,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11997 states, 8101 states have (on average 1.054684606838662) internal successors, (8544), 8288 states have internal predecessors, (8544), 2417 states have call successors, (2417), 424 states have call predecessors, (2417), 1475 states have return successors, (8115), 3284 states have call predecessors, (8115), 2362 states have call successors, (8115) [2021-12-06 23:07:05,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11997 states to 11997 states and 19076 transitions. [2021-12-06 23:07:05,833 INFO L78 Accepts]: Start accepts. Automaton has 11997 states and 19076 transitions. Word has length 99 [2021-12-06 23:07:05,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:05,834 INFO L470 AbstractCegarLoop]: Abstraction has 11997 states and 19076 transitions. [2021-12-06 23:07:05,834 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) [2021-12-06 23:07:05,834 INFO L276 IsEmpty]: Start isEmpty. Operand 11997 states and 19076 transitions. [2021-12-06 23:07:05,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-06 23:07:05,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:05,839 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] [2021-12-06 23:07:05,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 23:07:06,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 23:07:06,039 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:07:06,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:06,040 INFO L85 PathProgramCache]: Analyzing trace with hash -127918165, now seen corresponding path program 3 times [2021-12-06 23:07:06,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:06,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403214861] [2021-12-06 23:07:06,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:06,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:06,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:07:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:06,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:06,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:07:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:06,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:07:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 122 proven. 90 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 23:07:06,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:06,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403214861] [2021-12-06 23:07:06,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403214861] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:07:06,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817066664] [2021-12-06 23:07:06,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:07:06,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:06,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:06,217 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:07:06,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 23:07:06,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 23:07:06,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:07:06,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 23:07:06,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 119 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-06 23:07:06,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:07:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-06 23:07:06,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817066664] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:07:06,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:07:06,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2021-12-06 23:07:06,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703995531] [2021-12-06 23:07:06,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:07:06,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 23:07:06,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:06,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 23:07:06,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-12-06 23:07:06,551 INFO L87 Difference]: Start difference. First operand 11997 states and 19076 transitions. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 23:07:07,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:07,832 INFO L93 Difference]: Finished difference Result 20852 states and 35642 transitions. [2021-12-06 23:07:07,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 23:07:07,833 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 [2021-12-06 23:07:07,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:07,879 INFO L225 Difference]: With dead ends: 20852 [2021-12-06 23:07:07,880 INFO L226 Difference]: Without dead ends: 10359 [2021-12-06 23:07:07,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=989, Invalid=3433, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 23:07:07,937 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 218 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:07,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 156 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:07:07,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10359 states. [2021-12-06 23:07:08,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10359 to 8741. [2021-12-06 23:07:08,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8741 states, 5968 states have (on average 1.0464142091152815) internal successors, (6245), 6144 states have internal predecessors, (6245), 1711 states have call successors, (1711), 352 states have call predecessors, (1711), 1058 states have return successors, (4097), 2244 states have call predecessors, (4097), 1677 states have call successors, (4097) [2021-12-06 23:07:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8741 states to 8741 states and 12053 transitions. [2021-12-06 23:07:08,546 INFO L78 Accepts]: Start accepts. Automaton has 8741 states and 12053 transitions. Word has length 88 [2021-12-06 23:07:08,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:08,546 INFO L470 AbstractCegarLoop]: Abstraction has 8741 states and 12053 transitions. [2021-12-06 23:07:08,546 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) [2021-12-06 23:07:08,546 INFO L276 IsEmpty]: Start isEmpty. Operand 8741 states and 12053 transitions. [2021-12-06 23:07:08,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-06 23:07:08,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:08,550 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] [2021-12-06 23:07:08,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-06 23:07:08,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 23:07:08,751 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:07:08,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:08,753 INFO L85 PathProgramCache]: Analyzing trace with hash -635779733, now seen corresponding path program 4 times [2021-12-06 23:07:08,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:08,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411014410] [2021-12-06 23:07:08,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:08,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:08,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:08,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:07:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:08,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:08,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:08,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:08,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:07:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:08,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:07:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:08,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:07:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:08,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:07:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 51 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-06 23:07:08,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:08,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411014410] [2021-12-06 23:07:08,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411014410] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:07:08,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668059178] [2021-12-06 23:07:08,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:07:08,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:08,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:08,981 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:07:08,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 23:07:09,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:07:09,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:07:09,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 23:07:09,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 67 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-06 23:07:09,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:07:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 42 proven. 89 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-06 23:07:10,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668059178] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:07:10,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:07:10,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2021-12-06 23:07:10,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184873524] [2021-12-06 23:07:10,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:07:10,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 23:07:10,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:10,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 23:07:10,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 23:07:10,025 INFO L87 Difference]: Start difference. First operand 8741 states and 12053 transitions. Second operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2021-12-06 23:07:13,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:13,183 INFO L93 Difference]: Finished difference Result 29169 states and 46148 transitions. [2021-12-06 23:07:13,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-12-06 23:07:13,183 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 [2021-12-06 23:07:13,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:13,298 INFO L225 Difference]: With dead ends: 29169 [2021-12-06 23:07:13,298 INFO L226 Difference]: Without dead ends: 28067 [2021-12-06 23:07:13,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12286 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=5458, Invalid=27122, Unknown=0, NotChecked=0, Total=32580 [2021-12-06 23:07:13,329 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 219 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 985 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 2523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 985 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:13,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 360 Invalid, 2523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [985 Valid, 1538 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 23:07:13,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28067 states. [2021-12-06 23:07:14,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28067 to 17311. [2021-12-06 23:07:14,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17311 states, 11232 states have (on average 1.0269764957264957) internal successors, (11535), 11391 states have internal predecessors, (11535), 3626 states have call successors, (3626), 460 states have call predecessors, (3626), 2449 states have return successors, (11770), 5459 states have call predecessors, (11770), 3572 states have call successors, (11770) [2021-12-06 23:07:14,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17311 states to 17311 states and 26931 transitions. [2021-12-06 23:07:14,475 INFO L78 Accepts]: Start accepts. Automaton has 17311 states and 26931 transitions. Word has length 90 [2021-12-06 23:07:14,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:14,475 INFO L470 AbstractCegarLoop]: Abstraction has 17311 states and 26931 transitions. [2021-12-06 23:07:14,475 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) [2021-12-06 23:07:14,475 INFO L276 IsEmpty]: Start isEmpty. Operand 17311 states and 26931 transitions. [2021-12-06 23:07:14,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-06 23:07:14,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:14,478 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:14,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 23:07:14,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 23:07:14,679 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:07:14,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:14,679 INFO L85 PathProgramCache]: Analyzing trace with hash 147414137, now seen corresponding path program 3 times [2021-12-06 23:07:14,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:14,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432305398] [2021-12-06 23:07:14,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:14,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:14,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:14,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432305398] [2021-12-06 23:07:14,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432305398] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:07:14,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261145968] [2021-12-06 23:07:14,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:07:14,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:14,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:14,816 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:07:14,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 23:07:14,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-06 23:07:14,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:07:14,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 23:07:14,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:14,972 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:14,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:07:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:15,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261145968] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:07:15,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:07:15,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-12-06 23:07:15,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486459687] [2021-12-06 23:07:15,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:07:15,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 23:07:15,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:15,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 23:07:15,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 23:07:15,281 INFO L87 Difference]: Start difference. First operand 17311 states and 26931 transitions. Second operand has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:07:17,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:17,097 INFO L93 Difference]: Finished difference Result 28628 states and 44547 transitions. [2021-12-06 23:07:17,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-06 23:07:17,098 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-06 23:07:17,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:17,190 INFO L225 Difference]: With dead ends: 28628 [2021-12-06 23:07:17,190 INFO L226 Difference]: Without dead ends: 28627 [2021-12-06 23:07:17,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 23:07:17,202 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 1085 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1089 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:17,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1089 Valid, 754 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:07:17,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28627 states. [2021-12-06 23:07:18,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28627 to 28627. [2021-12-06 23:07:18,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28627 states, 18540 states have (on average 1.0279935275080907) internal successors, (19059), 18915 states have internal predecessors, (19059), 5846 states have call successors, (5846), 676 states have call predecessors, (5846), 4237 states have return successors, (19630), 9035 states have call predecessors, (19630), 5792 states have call successors, (19630) [2021-12-06 23:07:18,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28627 states to 28627 states and 44535 transitions. [2021-12-06 23:07:18,728 INFO L78 Accepts]: Start accepts. Automaton has 28627 states and 44535 transitions. Word has length 92 [2021-12-06 23:07:18,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:18,728 INFO L470 AbstractCegarLoop]: Abstraction has 28627 states and 44535 transitions. [2021-12-06 23:07:18,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:07:18,729 INFO L276 IsEmpty]: Start isEmpty. Operand 28627 states and 44535 transitions. [2021-12-06 23:07:18,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-06 23:07:18,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:18,738 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:18,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 23:07:18,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:18,940 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:07:18,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:18,941 INFO L85 PathProgramCache]: Analyzing trace with hash -570444405, now seen corresponding path program 2 times [2021-12-06 23:07:18,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:18,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547729727] [2021-12-06 23:07:18,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:18,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-06 23:07:19,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:19,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547729727] [2021-12-06 23:07:19,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547729727] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:07:19,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739700219] [2021-12-06 23:07:19,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:07:19,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:19,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:19,148 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:07:19,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 23:07:19,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:07:19,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:07:19,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 23:07:19,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-06 23:07:19,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:07:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-06 23:07:19,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739700219] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:07:19,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:07:19,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-12-06 23:07:19,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948070284] [2021-12-06 23:07:19,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:07:19,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 23:07:19,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:19,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 23:07:19,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 23:07:19,714 INFO L87 Difference]: Start difference. First operand 28627 states and 44535 transitions. Second operand has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:07:23,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:23,071 INFO L93 Difference]: Finished difference Result 64728 states and 101341 transitions. [2021-12-06 23:07:23,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-06 23:07:23,072 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-12-06 23:07:23,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:23,298 INFO L225 Difference]: With dead ends: 64728 [2021-12-06 23:07:23,298 INFO L226 Difference]: Without dead ends: 64727 [2021-12-06 23:07:23,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 23:07:23,324 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1618 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 669 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1621 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 669 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:23,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1621 Valid, 561 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [669 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 23:07:23,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64727 states. [2021-12-06 23:07:26,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64727 to 64675. [2021-12-06 23:07:26,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64675 states, 41976 states have (on average 1.028659233847913) internal successors, (43179), 42843 states have internal predecessors, (43179), 13190 states have call successors, (13190), 1564 states have call predecessors, (13190), 9505 states have return successors, (44950), 20267 states have call predecessors, (44950), 13076 states have call successors, (44950) [2021-12-06 23:07:26,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64675 states to 64675 states and 101319 transitions. [2021-12-06 23:07:26,979 INFO L78 Accepts]: Start accepts. Automaton has 64675 states and 101319 transitions. Word has length 142 [2021-12-06 23:07:26,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:26,980 INFO L470 AbstractCegarLoop]: Abstraction has 64675 states and 101319 transitions. [2021-12-06 23:07:26,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:07:26,980 INFO L276 IsEmpty]: Start isEmpty. Operand 64675 states and 101319 transitions. [2021-12-06 23:07:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-12-06 23:07:26,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:26,999 INFO L514 BasicCegarLoop]: trace histogram [28, 21, 17, 17, 17, 17, 16, 16, 16, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:27,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 23:07:27,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 23:07:27,200 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:07:27,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:27,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1542657745, now seen corresponding path program 1 times [2021-12-06 23:07:27,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:27,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955893758] [2021-12-06 23:07:27,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:27,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:07:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:07:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:07:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:27,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:07:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:07:27,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:07:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:07:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:07:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:07:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:07:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 23:07:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2009 backedges. 711 proven. 214 refuted. 0 times theorem prover too weak. 1084 trivial. 0 not checked. [2021-12-06 23:07:27,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:27,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955893758] [2021-12-06 23:07:27,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955893758] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:07:27,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230184766] [2021-12-06 23:07:27,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:27,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:27,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:27,641 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:07:27,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 23:07:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 23:07:27,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2009 backedges. 699 proven. 216 refuted. 0 times theorem prover too weak. 1094 trivial. 0 not checked. [2021-12-06 23:07:27,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:07:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2009 backedges. 715 proven. 263 refuted. 0 times theorem prover too weak. 1031 trivial. 0 not checked. [2021-12-06 23:07:29,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230184766] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:07:29,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:07:29,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 21] total 27 [2021-12-06 23:07:29,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309821269] [2021-12-06 23:07:29,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:07:29,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 23:07:29,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:29,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 23:07:29,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-12-06 23:07:29,140 INFO L87 Difference]: Start difference. First operand 64675 states and 101319 transitions. Second operand has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 24 states have internal predecessors, (122), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) [2021-12-06 23:07:33,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:33,817 INFO L93 Difference]: Finished difference Result 152847 states and 310280 transitions. [2021-12-06 23:07:33,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 23:07:33,818 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 24 states have internal predecessors, (122), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) Word has length 249 [2021-12-06 23:07:33,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:34,278 INFO L225 Difference]: With dead ends: 152847 [2021-12-06 23:07:34,279 INFO L226 Difference]: Without dead ends: 94875 [2021-12-06 23:07:34,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 528 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=423, Invalid=1557, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 23:07:34,602 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 161 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:34,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 265 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:07:34,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94875 states. [2021-12-06 23:07:39,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94875 to 64457. [2021-12-06 23:07:39,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64457 states, 41867 states have (on average 1.0287338476604486) internal successors, (43070), 42734 states have internal predecessors, (43070), 13081 states have call successors, (13081), 1564 states have call predecessors, (13081), 9505 states have return successors, (44883), 20158 states have call predecessors, (44883), 12967 states have call successors, (44883) [2021-12-06 23:07:39,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64457 states to 64457 states and 101034 transitions. [2021-12-06 23:07:39,563 INFO L78 Accepts]: Start accepts. Automaton has 64457 states and 101034 transitions. Word has length 249 [2021-12-06 23:07:39,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:39,564 INFO L470 AbstractCegarLoop]: Abstraction has 64457 states and 101034 transitions. [2021-12-06 23:07:39,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 24 states have internal predecessors, (122), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) [2021-12-06 23:07:39,564 INFO L276 IsEmpty]: Start isEmpty. Operand 64457 states and 101034 transitions. [2021-12-06 23:07:39,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-12-06 23:07:39,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:39,584 INFO L514 BasicCegarLoop]: trace histogram [28, 21, 17, 14, 14, 14, 14, 14, 14, 11, 10, 10, 10, 10, 10, 8, 8, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:39,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 23:07:39,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 23:07:39,785 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:07:39,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:39,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1417031478, now seen corresponding path program 5 times [2021-12-06 23:07:39,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:39,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772877580] [2021-12-06 23:07:39,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:39,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 23:07:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:07:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:07:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:07:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 23:07:39,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:07:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:07:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:07:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:07:40,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:07:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 23:07:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 23:07:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 23:07:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-06 23:07:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1997 backedges. 470 proven. 275 refuted. 0 times theorem prover too weak. 1252 trivial. 0 not checked. [2021-12-06 23:07:40,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:40,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772877580] [2021-12-06 23:07:40,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772877580] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:07:40,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665046684] [2021-12-06 23:07:40,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:07:40,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:40,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:40,244 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:07:40,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 23:07:40,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-06 23:07:40,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:07:40,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 23:07:40,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1997 backedges. 400 proven. 496 refuted. 0 times theorem prover too weak. 1101 trivial. 0 not checked. [2021-12-06 23:07:40,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:07:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1997 backedges. 410 proven. 506 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-12-06 23:07:41,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665046684] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:07:41,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:07:41,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 16, 19] total 50 [2021-12-06 23:07:41,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212878774] [2021-12-06 23:07:41,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:07:41,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 23:07:41,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:41,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 23:07:41,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2206, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 23:07:41,135 INFO L87 Difference]: Start difference. First operand 64457 states and 101034 transitions. Second operand has 50 states, 50 states have (on average 2.46) internal successors, (123), 37 states have internal predecessors, (123), 19 states have call successors, (23), 4 states have call predecessors, (23), 19 states have return successors, (35), 26 states have call predecessors, (35), 16 states have call successors, (35) [2021-12-06 23:07:52,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:52,474 INFO L93 Difference]: Finished difference Result 247404 states and 456761 transitions. [2021-12-06 23:07:52,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 296 states. [2021-12-06 23:07:52,474 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.46) internal successors, (123), 37 states have internal predecessors, (123), 19 states have call successors, (23), 4 states have call predecessors, (23), 19 states have return successors, (35), 26 states have call predecessors, (35), 16 states have call successors, (35) Word has length 251 [2021-12-06 23:07:52,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:53,484 INFO L225 Difference]: With dead ends: 247404 [2021-12-06 23:07:53,485 INFO L226 Difference]: Without dead ends: 183172 [2021-12-06 23:07:53,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 871 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51020 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=15454, Invalid=100486, Unknown=0, NotChecked=0, Total=115940 [2021-12-06 23:07:53,906 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 516 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 2990 mSolverCounterSat, 2715 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 5705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2715 IncrementalHoareTripleChecker+Valid, 2990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:53,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 592 Invalid, 5705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2715 Valid, 2990 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 23:07:53,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183172 states. [2021-12-06 23:08:00,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183172 to 68285. [2021-12-06 23:08:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68285 states, 44219 states have (on average 1.0267532056355866) internal successors, (45402), 45046 states have internal predecessors, (45402), 13829 states have call successors, (13829), 1606 states have call predecessors, (13829), 10233 states have return successors, (45915), 21632 states have call predecessors, (45915), 13736 states have call successors, (45915) [2021-12-06 23:08:00,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68285 states to 68285 states and 105146 transitions. [2021-12-06 23:08:00,737 INFO L78 Accepts]: Start accepts. Automaton has 68285 states and 105146 transitions. Word has length 251 [2021-12-06 23:08:00,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:00,737 INFO L470 AbstractCegarLoop]: Abstraction has 68285 states and 105146 transitions. [2021-12-06 23:08:00,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.46) internal successors, (123), 37 states have internal predecessors, (123), 19 states have call successors, (23), 4 states have call predecessors, (23), 19 states have return successors, (35), 26 states have call predecessors, (35), 16 states have call successors, (35) [2021-12-06 23:08:00,738 INFO L276 IsEmpty]: Start isEmpty. Operand 68285 states and 105146 transitions. [2021-12-06 23:08:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-12-06 23:08:00,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:00,759 INFO L514 BasicCegarLoop]: trace histogram [29, 23, 17, 14, 14, 14, 14, 14, 14, 12, 11, 11, 11, 11, 11, 9, 9, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:00,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-06 23:08:00,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:08:00,961 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:08:00,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:00,962 INFO L85 PathProgramCache]: Analyzing trace with hash -887006636, now seen corresponding path program 6 times [2021-12-06 23:08:00,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:00,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846710027] [2021-12-06 23:08:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:00,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:08:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:08:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:08:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:08:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 23:08:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:08:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:08:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:08:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:08:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:08:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:08:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:08:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:08:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:08:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:08:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:08:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 23:08:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 23:08:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 23:08:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-06 23:08:01,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-06 23:08:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2188 backedges. 524 proven. 350 refuted. 0 times theorem prover too weak. 1314 trivial. 0 not checked. [2021-12-06 23:08:01,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:01,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846710027] [2021-12-06 23:08:01,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846710027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:08:01,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017291229] [2021-12-06 23:08:01,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:08:01,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:08:01,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:08:01,479 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:08:01,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 23:08:01,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-06 23:08:01,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:08:01,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 23:08:01,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:08:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2188 backedges. 1041 proven. 60 refuted. 0 times theorem prover too weak. 1087 trivial. 0 not checked. [2021-12-06 23:08:01,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:08:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2188 backedges. 214 proven. 691 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2021-12-06 23:08:02,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017291229] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:08:02,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:08:02,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 19, 21] total 55 [2021-12-06 23:08:02,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523822159] [2021-12-06 23:08:02,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:08:02,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 23:08:02,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:02,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 23:08:02,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=2680, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 23:08:02,356 INFO L87 Difference]: Start difference. First operand 68285 states and 105146 transitions. Second operand has 55 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 38 states have internal predecessors, (122), 16 states have call successors, (22), 7 states have call predecessors, (22), 18 states have return successors, (32), 25 states have call predecessors, (32), 11 states have call successors, (32) [2021-12-06 23:08:14,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:14,739 INFO L93 Difference]: Finished difference Result 215628 states and 429697 transitions. [2021-12-06 23:08:14,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 371 states. [2021-12-06 23:08:14,739 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 38 states have internal predecessors, (122), 16 states have call successors, (22), 7 states have call predecessors, (22), 18 states have return successors, (32), 25 states have call predecessors, (32), 11 states have call successors, (32) Word has length 262 [2021-12-06 23:08:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:16,126 INFO L225 Difference]: With dead ends: 215628 [2021-12-06 23:08:16,126 INFO L226 Difference]: Without dead ends: 149906 [2021-12-06 23:08:16,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 972 GetRequests, 556 SyntacticMatches, 0 SemanticMatches, 416 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80903 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=22039, Invalid=152267, Unknown=0, NotChecked=0, Total=174306 [2021-12-06 23:08:16,446 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 502 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 4071 mSolverCounterSat, 3839 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 7910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3839 IncrementalHoareTripleChecker+Valid, 4071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:16,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 599 Invalid, 7910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3839 Valid, 4071 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 23:08:16,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149906 states. [2021-12-06 23:08:25,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149906 to 32636. [2021-12-06 23:08:25,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32636 states, 20971 states have (on average 1.015354537218063) internal successors, (21293), 20916 states have internal predecessors, (21293), 6679 states have call successors, (6679), 852 states have call predecessors, (6679), 4982 states have return successors, (26805), 10867 states have call predecessors, (26805), 6669 states have call successors, (26805) [2021-12-06 23:08:25,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32636 states to 32636 states and 54777 transitions. [2021-12-06 23:08:25,545 INFO L78 Accepts]: Start accepts. Automaton has 32636 states and 54777 transitions. Word has length 262 [2021-12-06 23:08:25,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:25,546 INFO L470 AbstractCegarLoop]: Abstraction has 32636 states and 54777 transitions. [2021-12-06 23:08:25,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 38 states have internal predecessors, (122), 16 states have call successors, (22), 7 states have call predecessors, (22), 18 states have return successors, (32), 25 states have call predecessors, (32), 11 states have call successors, (32) [2021-12-06 23:08:25,546 INFO L276 IsEmpty]: Start isEmpty. Operand 32636 states and 54777 transitions. [2021-12-06 23:08:25,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-06 23:08:25,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:25,550 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:25,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 23:08:25,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:08:25,751 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:08:25,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:25,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1134480241, now seen corresponding path program 4 times [2021-12-06 23:08:25,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:25,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674344018] [2021-12-06 23:08:25,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:25,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:08:26,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:26,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674344018] [2021-12-06 23:08:26,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674344018] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:08:26,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573980828] [2021-12-06 23:08:26,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:08:26,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:08:26,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:08:26,240 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:08:26,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 23:08:26,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:08:26,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:08:26,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 23:08:26,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:08:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:08:26,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:08:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:08:27,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573980828] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:08:27,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:08:27,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2021-12-06 23:08:27,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799948126] [2021-12-06 23:08:27,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:08:27,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-06 23:08:27,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:27,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-06 23:08:27,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2260, Invalid=6860, Unknown=0, NotChecked=0, Total=9120 [2021-12-06 23:08:27,538 INFO L87 Difference]: Start difference. First operand 32636 states and 54777 transitions. Second operand has 96 states, 93 states have (on average 3.5161290322580645) internal successors, (327), 50 states have internal predecessors, (327), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:08:32,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:32,377 INFO L93 Difference]: Finished difference Result 34941 states and 58233 transitions. [2021-12-06 23:08:32,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-12-06 23:08:32,377 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 93 states have (on average 3.5161290322580645) internal successors, (327), 50 states have internal predecessors, (327), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-12-06 23:08:32,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:32,513 INFO L225 Difference]: With dead ends: 34941 [2021-12-06 23:08:32,513 INFO L226 Difference]: Without dead ends: 34940 [2021-12-06 23:08:32,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8376 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=10814, Invalid=23968, Unknown=0, NotChecked=0, Total=34782 [2021-12-06 23:08:32,533 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 2814 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 2429 mSolverCounterSat, 1532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2818 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 3961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1532 IncrementalHoareTripleChecker+Valid, 2429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:32,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2818 Valid, 1330 Invalid, 3961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1532 Valid, 2429 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 23:08:32,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34940 states. [2021-12-06 23:08:34,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34940 to 34940. [2021-12-06 23:08:34,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34940 states, 22411 states have (on average 1.0154388469947793) internal successors, (22757), 22380 states have internal predecessors, (22757), 7135 states have call successors, (7135), 876 states have call predecessors, (7135), 5390 states have return successors, (28317), 11683 states have call predecessors, (28317), 7125 states have call successors, (28317) [2021-12-06 23:08:34,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34940 states to 34940 states and 58209 transitions. [2021-12-06 23:08:34,843 INFO L78 Accepts]: Start accepts. Automaton has 34940 states and 58209 transitions. Word has length 188 [2021-12-06 23:08:34,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:34,843 INFO L470 AbstractCegarLoop]: Abstraction has 34940 states and 58209 transitions. [2021-12-06 23:08:34,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 93 states have (on average 3.5161290322580645) internal successors, (327), 50 states have internal predecessors, (327), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:08:34,844 INFO L276 IsEmpty]: Start isEmpty. Operand 34940 states and 58209 transitions. [2021-12-06 23:08:34,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-06 23:08:34,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:34,850 INFO L514 BasicCegarLoop]: trace histogram [22, 20, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:34,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 23:08:35,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:08:35,051 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:08:35,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:35,052 INFO L85 PathProgramCache]: Analyzing trace with hash -227857049, now seen corresponding path program 7 times [2021-12-06 23:08:35,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:35,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531469994] [2021-12-06 23:08:35,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:35,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:08:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:08:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:08:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:08:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:08:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:08:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:08:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:08:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:08:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:08:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:08:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:08:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:08:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:08:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 23:08:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 23:08:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 23:08:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-06 23:08:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-06 23:08:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-06 23:08:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 189 proven. 434 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2021-12-06 23:08:35,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:35,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531469994] [2021-12-06 23:08:35,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531469994] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:08:35,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869668051] [2021-12-06 23:08:35,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 23:08:35,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:08:35,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:08:35,603 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:08:35,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 23:08:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:35,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-06 23:08:35,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:08:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 142 proven. 436 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2021-12-06 23:08:35,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:08:43,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 162 proven. 641 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2021-12-06 23:08:43,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869668051] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:08:43,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:08:43,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 53] total 90 [2021-12-06 23:08:43,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802250474] [2021-12-06 23:08:43,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:08:43,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-12-06 23:08:43,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:43,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-12-06 23:08:43,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=924, Invalid=7266, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 23:08:43,998 INFO L87 Difference]: Start difference. First operand 34940 states and 58209 transitions. Second operand has 91 states, 90 states have (on average 1.6) internal successors, (144), 69 states have internal predecessors, (144), 21 states have call successors, (23), 3 states have call predecessors, (23), 32 states have return successors, (41), 40 states have call predecessors, (41), 19 states have call successors, (41) [2021-12-06 23:09:19,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:09:19,221 INFO L93 Difference]: Finished difference Result 418846 states and 931284 transitions. [2021-12-06 23:09:19,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1031 states. [2021-12-06 23:09:19,222 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 1.6) internal successors, (144), 69 states have internal predecessors, (144), 21 states have call successors, (23), 3 states have call predecessors, (23), 32 states have return successors, (41), 40 states have call predecessors, (41), 19 states have call successors, (41) Word has length 204 [2021-12-06 23:09:19,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:09:23,628 INFO L225 Difference]: With dead ends: 418846 [2021-12-06 23:09:23,628 INFO L226 Difference]: Without dead ends: 418119 [2021-12-06 23:09:24,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1518 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 1115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673990 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=208672, Invalid=1037900, Unknown=0, NotChecked=0, Total=1246572 [2021-12-06 23:09:24,181 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 290 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 5727 mSolverCounterSat, 6269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 11996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6269 IncrementalHoareTripleChecker+Valid, 5727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:09:24,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 555 Invalid, 11996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6269 Valid, 5727 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-06 23:09:24,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418119 states. [2021-12-06 23:10:41,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418119 to 46232. [2021-12-06 23:10:41,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46232 states, 29158 states have (on average 1.0118320872487825) internal successors, (29503), 29106 states have internal predecessors, (29503), 9847 states have call successors, (9847), 959 states have call predecessors, (9847), 7223 states have return successors, (31751), 16166 states have call predecessors, (31751), 9837 states have call successors, (31751) [2021-12-06 23:10:41,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46232 states to 46232 states and 71101 transitions. [2021-12-06 23:10:41,308 INFO L78 Accepts]: Start accepts. Automaton has 46232 states and 71101 transitions. Word has length 204 [2021-12-06 23:10:41,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:41,308 INFO L470 AbstractCegarLoop]: Abstraction has 46232 states and 71101 transitions. [2021-12-06 23:10:41,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 1.6) internal successors, (144), 69 states have internal predecessors, (144), 21 states have call successors, (23), 3 states have call predecessors, (23), 32 states have return successors, (41), 40 states have call predecessors, (41), 19 states have call successors, (41) [2021-12-06 23:10:41,308 INFO L276 IsEmpty]: Start isEmpty. Operand 46232 states and 71101 transitions. [2021-12-06 23:10:41,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-12-06 23:10:41,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:41,331 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2021-12-06 23:10:41,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 23:10:41,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:10:41,532 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:10:41,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:41,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1149051225, now seen corresponding path program 3 times [2021-12-06 23:10:41,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:10:41,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810494331] [2021-12-06 23:10:41,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:41,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:10:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4623 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-06 23:10:42,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:10:42,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810494331] [2021-12-06 23:10:42,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810494331] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:10:42,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744134146] [2021-12-06 23:10:42,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:10:42,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:10:42,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:10:42,100 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:10:42,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 23:10:42,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2021-12-06 23:10:42,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:10:42,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-06 23:10:42,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:10:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4623 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-06 23:10:42,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:10:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4623 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-06 23:10:43,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744134146] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:10:43,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:10:43,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2021-12-06 23:10:43,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611332201] [2021-12-06 23:10:43,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:10:43,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-06 23:10:43,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:10:43,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-06 23:10:43,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2260, Invalid=6860, Unknown=0, NotChecked=0, Total=9120 [2021-12-06 23:10:43,732 INFO L87 Difference]: Start difference. First operand 46232 states and 71101 transitions. Second operand has 96 states, 95 states have (on average 4.6947368421052635) internal successors, (446), 50 states have internal predecessors, (446), 46 states have call successors, (88), 46 states have call predecessors, (88), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:10:52,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:52,249 INFO L93 Difference]: Finished difference Result 92595 states and 143485 transitions. [2021-12-06 23:10:52,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-12-06 23:10:52,250 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 4.6947368421052635) internal successors, (446), 50 states have internal predecessors, (446), 46 states have call successors, (88), 46 states have call predecessors, (88), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 310 [2021-12-06 23:10:52,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:52,603 INFO L225 Difference]: With dead ends: 92595 [2021-12-06 23:10:52,603 INFO L226 Difference]: Without dead ends: 92594 [2021-12-06 23:10:52,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 799 GetRequests, 614 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8376 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=10814, Invalid=23968, Unknown=0, NotChecked=0, Total=34782 [2021-12-06 23:10:52,639 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 4776 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 1857 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4779 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 3947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1857 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:52,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4779 Valid, 1074 Invalid, 3947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1857 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 23:10:52,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92594 states. [2021-12-06 23:10:58,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92594 to 92504. [2021-12-06 23:10:58,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92504 states, 58414 states have (on average 1.0116581641387339) internal successors, (59095), 58242 states have internal predecessors, (59095), 19759 states have call successors, (19759), 1991 states have call predecessors, (19759), 14327 states have return successors, (64607), 32270 states have call predecessors, (64607), 19749 states have call successors, (64607) [2021-12-06 23:10:59,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92504 states to 92504 states and 143461 transitions. [2021-12-06 23:10:59,063 INFO L78 Accepts]: Start accepts. Automaton has 92504 states and 143461 transitions. Word has length 310 [2021-12-06 23:10:59,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:59,064 INFO L470 AbstractCegarLoop]: Abstraction has 92504 states and 143461 transitions. [2021-12-06 23:10:59,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 4.6947368421052635) internal successors, (446), 50 states have internal predecessors, (446), 46 states have call successors, (88), 46 states have call predecessors, (88), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:10:59,064 INFO L276 IsEmpty]: Start isEmpty. Operand 92504 states and 143461 transitions. [2021-12-06 23:10:59,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2021-12-06 23:10:59,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:59,099 INFO L514 BasicCegarLoop]: trace histogram [66, 49, 43, 43, 43, 42, 42, 42, 39, 17, 17, 17, 17, 17, 17, 16, 16, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-12-06 23:10:59,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-06 23:10:59,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:10:59,300 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:10:59,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:59,301 INFO L85 PathProgramCache]: Analyzing trace with hash -832010463, now seen corresponding path program 2 times [2021-12-06 23:10:59,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:10:59,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232395954] [2021-12-06 23:10:59,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:59,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:10:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2021-12-06 23:10:59,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:10:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:10:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:10:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:10:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:10:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:10:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:10:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:10:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:10:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:10:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:10:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:10:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:10:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:10:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:10:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:10:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-06 23:10:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:10:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:10:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:10:59,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:10:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:10:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:10:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:10:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:10:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:10:59,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:10:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:10:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:10:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:10:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:59,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:11:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:00,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 23:11:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:00,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 23:11:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:00,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 23:11:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:00,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-06 23:11:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:00,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-06 23:11:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:00,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-06 23:11:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:00,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2021-12-06 23:11:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:00,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12103 backedges. 1387 proven. 5681 refuted. 0 times theorem prover too weak. 5035 trivial. 0 not checked. [2021-12-06 23:11:00,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:11:00,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232395954] [2021-12-06 23:11:00,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232395954] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:11:00,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79942934] [2021-12-06 23:11:00,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:11:00,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:11:00,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:11:00,030 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:11:00,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 23:11:00,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:11:00,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:11:00,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 1323 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 23:11:00,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:11:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12103 backedges. 3017 proven. 4754 refuted. 0 times theorem prover too weak. 4332 trivial. 0 not checked. [2021-12-06 23:11:01,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:11:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12103 backedges. 3017 proven. 4754 refuted. 0 times theorem prover too weak. 4332 trivial. 0 not checked. [2021-12-06 23:11:02,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79942934] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:11:02,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:11:02,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 57, 57] total 77 [2021-12-06 23:11:02,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926568911] [2021-12-06 23:11:02,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:11:02,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-06 23:11:02,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:11:02,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-06 23:11:02,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=931, Invalid=4921, Unknown=0, NotChecked=0, Total=5852 [2021-12-06 23:11:02,080 INFO L87 Difference]: Start difference. First operand 92504 states and 143461 transitions. Second operand has 77 states, 75 states have (on average 3.6933333333333334) internal successors, (277), 48 states have internal predecessors, (277), 40 states have call successors, (46), 31 states have call predecessors, (46), 9 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) [2021-12-06 23:11:14,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:11:14,809 INFO L93 Difference]: Finished difference Result 176673 states and 361745 transitions. [2021-12-06 23:11:14,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2021-12-06 23:11:14,810 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 75 states have (on average 3.6933333333333334) internal successors, (277), 48 states have internal predecessors, (277), 40 states have call successors, (46), 31 states have call predecessors, (46), 9 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) Word has length 585 [2021-12-06 23:11:14,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:11:15,235 INFO L225 Difference]: With dead ends: 176673 [2021-12-06 23:11:15,235 INFO L226 Difference]: Without dead ends: 81419 [2021-12-06 23:11:15,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1552 GetRequests, 1257 SyntacticMatches, 2 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27396 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=19488, Invalid=67242, Unknown=0, NotChecked=0, Total=86730 [2021-12-06 23:11:15,929 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 1711 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 5163 mSolverCounterSat, 3393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1711 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 8556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3393 IncrementalHoareTripleChecker+Valid, 5163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:11:15,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1711 Valid, 887 Invalid, 8556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3393 Valid, 5163 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 23:11:15,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81419 states. [2021-12-06 23:11:21,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81419 to 77706. [2021-12-06 23:11:21,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77706 states, 50851 states have (on average 1.016479518593538) internal successors, (51689), 50520 states have internal predecessors, (51689), 14726 states have call successors, (14726), 2397 states have call predecessors, (14726), 12125 states have return successors, (60203), 24788 states have call predecessors, (60203), 14467 states have call successors, (60203) [2021-12-06 23:11:21,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77706 states to 77706 states and 126618 transitions. [2021-12-06 23:11:21,787 INFO L78 Accepts]: Start accepts. Automaton has 77706 states and 126618 transitions. Word has length 585 [2021-12-06 23:11:21,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:11:21,788 INFO L470 AbstractCegarLoop]: Abstraction has 77706 states and 126618 transitions. [2021-12-06 23:11:21,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 75 states have (on average 3.6933333333333334) internal successors, (277), 48 states have internal predecessors, (277), 40 states have call successors, (46), 31 states have call predecessors, (46), 9 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) [2021-12-06 23:11:21,788 INFO L276 IsEmpty]: Start isEmpty. Operand 77706 states and 126618 transitions. [2021-12-06 23:11:21,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2021-12-06 23:11:21,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:11:21,827 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 46, 46, 1, 1, 1, 1, 1, 1] [2021-12-06 23:11:21,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-06 23:11:22,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:11:22,028 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:11:22,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:11:22,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1237268127, now seen corresponding path program 5 times [2021-12-06 23:11:22,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:11:22,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373311994] [2021-12-06 23:11:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:11:22,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:11:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8602 backedges. 0 proven. 8602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:11:23,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:11:23,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373311994] [2021-12-06 23:11:23,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373311994] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:11:23,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65529023] [2021-12-06 23:11:23,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:11:23,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:11:23,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:11:23,560 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:11:23,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 23:11:23,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-12-06 23:11:23,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:11:23,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-06 23:11:23,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:11:24,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8602 backedges. 0 proven. 8602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:11:24,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:11:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8602 backedges. 0 proven. 8602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:11:28,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65529023] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:11:28,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:11:28,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2021-12-06 23:11:28,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944930197] [2021-12-06 23:11:28,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:11:28,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-12-06 23:11:28,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:11:28,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-12-06 23:11:28,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9124, Invalid=27548, Unknown=0, NotChecked=0, Total=36672 [2021-12-06 23:11:28,009 INFO L87 Difference]: Start difference. First operand 77706 states and 126618 transitions. Second operand has 192 states, 189 states have (on average 3.507936507936508) internal successors, (663), 98 states have internal predecessors, (663), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:11:39,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:11:39,883 INFO L93 Difference]: Finished difference Result 78092 states and 127051 transitions. [2021-12-06 23:11:39,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2021-12-06 23:11:39,883 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 189 states have (on average 3.507936507936508) internal successors, (663), 98 states have internal predecessors, (663), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 380 [2021-12-06 23:11:39,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:11:40,230 INFO L225 Difference]: With dead ends: 78092 [2021-12-06 23:11:40,230 INFO L226 Difference]: Without dead ends: 78091 [2021-12-06 23:11:40,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 971 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21739 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=28869, Invalid=66303, Unknown=0, NotChecked=0, Total=95172 [2021-12-06 23:11:40,267 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 4897 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 1487 mSolverCounterSat, 1729 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4901 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1729 IncrementalHoareTripleChecker+Valid, 1487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:11:40,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4901 Valid, 1180 Invalid, 3216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1729 Valid, 1487 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 23:11:40,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78091 states. [2021-12-06 23:11:45,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78091 to 78090. [2021-12-06 23:11:45,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78090 states, 51187 states have (on average 1.0163713442866353) internal successors, (52025), 50856 states have internal predecessors, (52025), 14774 states have call successors, (14774), 2445 states have call predecessors, (14774), 12125 states have return successors, (60203), 24788 states have call predecessors, (60203), 14467 states have call successors, (60203) [2021-12-06 23:11:45,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78090 states to 78090 states and 127002 transitions. [2021-12-06 23:11:45,910 INFO L78 Accepts]: Start accepts. Automaton has 78090 states and 127002 transitions. Word has length 380 [2021-12-06 23:11:45,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:11:45,910 INFO L470 AbstractCegarLoop]: Abstraction has 78090 states and 127002 transitions. [2021-12-06 23:11:45,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 189 states have (on average 3.507936507936508) internal successors, (663), 98 states have internal predecessors, (663), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:11:45,911 INFO L276 IsEmpty]: Start isEmpty. Operand 78090 states and 127002 transitions. [2021-12-06 23:11:45,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2021-12-06 23:11:45,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:11:45,955 INFO L514 BasicCegarLoop]: trace histogram [65, 54, 38, 34, 34, 34, 34, 34, 34, 27, 26, 26, 26, 26, 26, 24, 24, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-06 23:11:45,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-06 23:11:46,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:11:46,156 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:11:46,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:11:46,158 INFO L85 PathProgramCache]: Analyzing trace with hash 378413589, now seen corresponding path program 8 times [2021-12-06 23:11:46,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:11:46,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307830760] [2021-12-06 23:11:46,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:11:46,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:11:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:11:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:11:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:11:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:11:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:11:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:46,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:11:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:11:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:11:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:11:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2021-12-06 23:11:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:46,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:47,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:11:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:11:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:11:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:11:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:11:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 23:11:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 23:11:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 23:11:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-06 23:11:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-06 23:11:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-06 23:11:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2021-12-06 23:11:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2021-12-06 23:11:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2021-12-06 23:11:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2021-12-06 23:11:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2021-12-06 23:11:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2021-12-06 23:11:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 309 [2021-12-06 23:11:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2021-12-06 23:11:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 347 [2021-12-06 23:11:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 366 [2021-12-06 23:11:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:11:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12156 backedges. 2789 proven. 1769 refuted. 0 times theorem prover too weak. 7598 trivial. 0 not checked. [2021-12-06 23:11:47,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:11:47,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307830760] [2021-12-06 23:11:47,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307830760] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:11:47,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945845331] [2021-12-06 23:11:47,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:11:47,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:11:47,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:11:47,780 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:11:47,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0788de8b-5094-4947-b7cd-8e175de273b3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 23:11:47,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:11:47,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:11:47,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-06 23:11:48,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:11:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12156 backedges. 4128 proven. 2840 refuted. 0 times theorem prover too weak. 5188 trivial. 0 not checked. [2021-12-06 23:11:48,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:12:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12156 backedges. 4198 proven. 4115 refuted. 0 times theorem prover too weak. 3843 trivial. 0 not checked. [2021-12-06 23:12:06,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945845331] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:12:06,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:12:06,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 44, 70] total 135 [2021-12-06 23:12:06,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585501569] [2021-12-06 23:12:06,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:12:06,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2021-12-06 23:12:06,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:12:06,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-12-06 23:12:06,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1646, Invalid=16444, Unknown=0, NotChecked=0, Total=18090 [2021-12-06 23:12:06,294 INFO L87 Difference]: Start difference. First operand 78090 states and 127002 transitions. Second operand has 135 states, 135 states have (on average 2.8518518518518516) internal successors, (385), 105 states have internal predecessors, (385), 71 states have call successors, (76), 10 states have call predecessors, (76), 48 states have return successors, (111), 65 states have call predecessors, (111), 63 states have call successors, (111)