./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/Ackermann03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:12:05,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:12:05,798 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:12:05,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:12:05,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:12:05,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:12:05,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:12:05,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:12:05,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:12:05,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:12:05,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:12:05,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:12:05,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:12:05,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:12:05,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:12:05,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:12:05,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:12:05,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:12:05,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:12:05,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:12:05,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:12:05,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:12:05,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:12:05,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:12:05,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:12:05,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:12:05,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:12:05,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:12:05,888 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:12:05,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:12:05,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:12:05,891 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:12:05,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:12:05,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:12:05,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:12:05,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:12:05,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:12:05,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:12:05,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:12:05,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:12:05,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:12:05,904 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-11-19 05:12:05,953 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:12:05,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:12:05,954 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:12:05,955 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:12:05,955 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:12:05,956 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:12:05,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:12:05,957 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:12:05,957 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:12:05,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:12:05,958 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 05:12:05,959 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 05:12:05,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:12:05,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 05:12:05,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:12:05,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 05:12:05,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:12:05,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 05:12:05,961 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-19 05:12:05,961 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 05:12:05,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:12:05,961 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:12:05,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 05:12:05,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:12:05,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:12:05,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:12:05,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:12:05,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:12:05,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:12:05,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 05:12:05,965 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:12:05,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:12:05,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 05:12:05,966 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:12:05,966 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_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd [2021-11-19 05:12:06,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:12:06,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:12:06,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:12:06,318 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:12:06,319 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:12:06,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/recursive/Ackermann03.c [2021-11-19 05:12:06,394 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/data/97fd1ebc2/e76f9b90b866462a8004347eac8d9874/FLAG6ef98605a [2021-11-19 05:12:06,840 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:12:06,841 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/sv-benchmarks/c/recursive/Ackermann03.c [2021-11-19 05:12:06,854 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/data/97fd1ebc2/e76f9b90b866462a8004347eac8d9874/FLAG6ef98605a [2021-11-19 05:12:07,245 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/data/97fd1ebc2/e76f9b90b866462a8004347eac8d9874 [2021-11-19 05:12:07,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:12:07,252 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:12:07,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:12:07,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:12:07,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:12:07,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:12:07" (1/1) ... [2021-11-19 05:12:07,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20b21233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:07, skipping insertion in model container [2021-11-19 05:12:07,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:12:07" (1/1) ... [2021-11-19 05:12:07,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:12:07,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:12:07,537 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_6d10ad6d-988b-45d4-a683-a61cfc6336f9/sv-benchmarks/c/recursive/Ackermann03.c[1168,1181] [2021-11-19 05:12:07,538 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:12:07,549 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:12:07,582 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_6d10ad6d-988b-45d4-a683-a61cfc6336f9/sv-benchmarks/c/recursive/Ackermann03.c[1168,1181] [2021-11-19 05:12:07,583 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:12:07,596 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:12:07,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:07 WrapperNode [2021-11-19 05:12:07,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:12:07,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:12:07,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:12:07,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:12:07,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:07" (1/1) ... [2021-11-19 05:12:07,618 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:07" (1/1) ... [2021-11-19 05:12:07,638 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2021-11-19 05:12:07,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:12:07,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:12:07,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:12:07,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:12:07,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:07" (1/1) ... [2021-11-19 05:12:07,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:07" (1/1) ... [2021-11-19 05:12:07,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:07" (1/1) ... [2021-11-19 05:12:07,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:07" (1/1) ... [2021-11-19 05:12:07,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:07" (1/1) ... [2021-11-19 05:12:07,677 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:07" (1/1) ... [2021-11-19 05:12:07,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:07" (1/1) ... [2021-11-19 05:12:07,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:12:07,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:12:07,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:12:07,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:12:07,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:07" (1/1) ... [2021-11-19 05:12:07,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:12:07,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:07,723 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:12:07,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:12:07,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:12:07,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:12:07,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:12:07,774 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2021-11-19 05:12:07,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2021-11-19 05:12:07,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 05:12:07,840 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:12:07,842 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:12:07,974 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:12:07,981 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:12:07,981 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 05:12:07,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:12:07 BoogieIcfgContainer [2021-11-19 05:12:07,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:12:07,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:12:07,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:12:07,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:12:07,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:12:07" (1/3) ... [2021-11-19 05:12:07,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1adc5062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:12:07, skipping insertion in model container [2021-11-19 05:12:07,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:07" (2/3) ... [2021-11-19 05:12:07,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1adc5062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:12:07, skipping insertion in model container [2021-11-19 05:12:07,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:12:07" (3/3) ... [2021-11-19 05:12:07,992 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2021-11-19 05:12:07,997 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:12:07,997 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-11-19 05:12:08,047 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:12:08,054 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 [2021-11-19 05:12:08,054 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-11-19 05:12:08,089 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) [2021-11-19 05:12:08,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 05:12:08,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:08,094 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:08,095 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:08,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:08,124 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2021-11-19 05:12:08,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:08,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321054535] [2021-11-19 05:12:08,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:08,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:08,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:08,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321054535] [2021-11-19 05:12:08,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321054535] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:08,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:08,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:12:08,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817095908] [2021-11-19 05:12:08,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:08,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:12:08,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:08,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:12:08,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:12:08,462 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) [2021-11-19 05:12:08,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:08,602 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-11-19 05:12:08,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:12:08,605 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 [2021-11-19 05:12:08,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:08,614 INFO L225 Difference]: With dead ends: 73 [2021-11-19 05:12:08,615 INFO L226 Difference]: Without dead ends: 59 [2021-11-19 05:12:08,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:12:08,622 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:12:08,623 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] [2021-11-19 05:12:08,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-19 05:12:08,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2021-11-19 05:12:08,666 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) [2021-11-19 05:12:08,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2021-11-19 05:12:08,671 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2021-11-19 05:12:08,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:08,671 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2021-11-19 05:12:08,672 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) [2021-11-19 05:12:08,672 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2021-11-19 05:12:08,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-19 05:12:08,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:08,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:08,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:12:08,673 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:08,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:08,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2021-11-19 05:12:08,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:08,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680333582] [2021-11-19 05:12:08,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:08,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:08,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:08,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680333582] [2021-11-19 05:12:08,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680333582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:08,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:08,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:12:08,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000497207] [2021-11-19 05:12:08,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:08,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:12:08,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:08,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:12:08,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:12:08,745 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) [2021-11-19 05:12:08,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:08,847 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-11-19 05:12:08,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:12:08,848 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 [2021-11-19 05:12:08,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:08,851 INFO L225 Difference]: With dead ends: 51 [2021-11-19 05:12:08,854 INFO L226 Difference]: Without dead ends: 49 [2021-11-19 05:12:08,855 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 [2021-11-19 05:12:08,856 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, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:12:08,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 47 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:12:08,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-19 05:12:08,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-19 05:12:08,871 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) [2021-11-19 05:12:08,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2021-11-19 05:12:08,874 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 9 [2021-11-19 05:12:08,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:08,874 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2021-11-19 05:12:08,875 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) [2021-11-19 05:12:08,875 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2021-11-19 05:12:08,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-19 05:12:08,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:08,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:08,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 05:12:08,877 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:08,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:08,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2021-11-19 05:12:08,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:08,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126431082] [2021-11-19 05:12:08,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:08,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:08,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:08,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126431082] [2021-11-19 05:12:08,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126431082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:08,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:08,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:12:08,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141885855] [2021-11-19 05:12:08,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:08,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:12:08,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:08,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:12:08,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:12:08,927 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) [2021-11-19 05:12:09,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:09,033 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-11-19 05:12:09,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:12:09,034 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 [2021-11-19 05:12:09,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:09,036 INFO L225 Difference]: With dead ends: 76 [2021-11-19 05:12:09,039 INFO L226 Difference]: Without dead ends: 74 [2021-11-19 05:12:09,040 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 [2021-11-19 05:12:09,042 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, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:12:09,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 104 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:12:09,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-19 05:12:09,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-11-19 05:12:09,073 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) [2021-11-19 05:12:09,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2021-11-19 05:12:09,084 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 9 [2021-11-19 05:12:09,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:09,085 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2021-11-19 05:12:09,085 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) [2021-11-19 05:12:09,085 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2021-11-19 05:12:09,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 05:12:09,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:09,086 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:09,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 05:12:09,087 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:09,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:09,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2021-11-19 05:12:09,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:09,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825659105] [2021-11-19 05:12:09,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:09,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:09,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:09,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825659105] [2021-11-19 05:12:09,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825659105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:09,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:09,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:12:09,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639325232] [2021-11-19 05:12:09,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:09,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:12:09,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:09,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:12:09,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:12:09,135 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) [2021-11-19 05:12:09,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:09,210 INFO L93 Difference]: Finished difference Result 116 states and 154 transitions. [2021-11-19 05:12:09,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:12:09,211 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 [2021-11-19 05:12:09,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:09,218 INFO L225 Difference]: With dead ends: 116 [2021-11-19 05:12:09,218 INFO L226 Difference]: Without dead ends: 108 [2021-11-19 05:12:09,219 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 [2021-11-19 05:12:09,221 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 [2021-11-19 05:12:09,225 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] [2021-11-19 05:12:09,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-19 05:12:09,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2021-11-19 05:12:09,261 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) [2021-11-19 05:12:09,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2021-11-19 05:12:09,267 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 10 [2021-11-19 05:12:09,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:09,268 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2021-11-19 05:12:09,268 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) [2021-11-19 05:12:09,269 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2021-11-19 05:12:09,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-19 05:12:09,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:09,271 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:09,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 05:12:09,272 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:09,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:09,274 INFO L85 PathProgramCache]: Analyzing trace with hash 219392943, now seen corresponding path program 1 times [2021-11-19 05:12:09,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:09,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480766646] [2021-11-19 05:12:09,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:09,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:09,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:09,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480766646] [2021-11-19 05:12:09,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480766646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:09,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:12:09,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:12:09,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117622551] [2021-11-19 05:12:09,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:09,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:12:09,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:09,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:12:09,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:12:09,363 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) [2021-11-19 05:12:09,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:09,442 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2021-11-19 05:12:09,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:12:09,443 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 [2021-11-19 05:12:09,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:09,444 INFO L225 Difference]: With dead ends: 168 [2021-11-19 05:12:09,445 INFO L226 Difference]: Without dead ends: 97 [2021-11-19 05:12:09,447 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 [2021-11-19 05:12:09,449 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 [2021-11-19 05:12:09,449 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] [2021-11-19 05:12:09,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-19 05:12:09,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-11-19 05:12:09,474 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) [2021-11-19 05:12:09,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2021-11-19 05:12:09,477 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 16 [2021-11-19 05:12:09,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:09,477 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2021-11-19 05:12:09,477 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) [2021-11-19 05:12:09,478 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2021-11-19 05:12:09,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-19 05:12:09,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:09,479 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:09,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 05:12:09,479 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:09,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:09,480 INFO L85 PathProgramCache]: Analyzing trace with hash 219399894, now seen corresponding path program 1 times [2021-11-19 05:12:09,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:09,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087807906] [2021-11-19 05:12:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:09,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:09,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:09,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:09,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087807906] [2021-11-19 05:12:09,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087807906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:09,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051112573] [2021-11-19 05:12:09,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:09,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:09,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:09,588 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:09,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 05:12:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:09,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 05:12:09,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:09,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:12:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:09,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051112573] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:12:09,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:12:09,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-19 05:12:09,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903227217] [2021-11-19 05:12:09,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:12:09,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 05:12:09,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:09,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 05:12:09,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:12:09,906 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) [2021-11-19 05:12:10,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:10,227 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2021-11-19 05:12:10,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 05:12:10,228 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 [2021-11-19 05:12:10,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:10,242 INFO L225 Difference]: With dead ends: 274 [2021-11-19 05:12:10,242 INFO L226 Difference]: Without dead ends: 272 [2021-11-19 05:12:10,247 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 [2021-11-19 05:12:10,251 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 250 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:12:10,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 180 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:12:10,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-19 05:12:10,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2021-11-19 05:12:10,320 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) [2021-11-19 05:12:10,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2021-11-19 05:12:10,324 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 16 [2021-11-19 05:12:10,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:10,325 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2021-11-19 05:12:10,325 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) [2021-11-19 05:12:10,325 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2021-11-19 05:12:10,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-19 05:12:10,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:10,327 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:10,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 05:12:10,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-19 05:12:10,543 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:10,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:10,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1162887243, now seen corresponding path program 1 times [2021-11-19 05:12:10,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:10,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034780121] [2021-11-19 05:12:10,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:10,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:10,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:10,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034780121] [2021-11-19 05:12:10,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034780121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:10,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562685725] [2021-11-19 05:12:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:10,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:10,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:10,628 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:10,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 05:12:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:10,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 05:12:10,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:10,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:12:10,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562685725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:10,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:12:10,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 05:12:10,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057689113] [2021-11-19 05:12:10,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:10,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:12:10,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:10,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:12:10,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:12:10,767 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) [2021-11-19 05:12:10,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:10,894 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2021-11-19 05:12:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:12:10,894 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 [2021-11-19 05:12:10,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:10,899 INFO L225 Difference]: With dead ends: 328 [2021-11-19 05:12:10,899 INFO L226 Difference]: Without dead ends: 327 [2021-11-19 05:12:10,902 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 [2021-11-19 05:12:10,905 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 49 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:12:10,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 91 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:12:10,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-19 05:12:10,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2021-11-19 05:12:10,957 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) [2021-11-19 05:12:10,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2021-11-19 05:12:10,961 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 17 [2021-11-19 05:12:10,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:10,962 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2021-11-19 05:12:10,962 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) [2021-11-19 05:12:10,962 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2021-11-19 05:12:10,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-19 05:12:10,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:10,964 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:10,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 05:12:11,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-19 05:12:11,179 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:11,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:11,179 INFO L85 PathProgramCache]: Analyzing trace with hash 523262015, now seen corresponding path program 1 times [2021-11-19 05:12:11,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:11,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134200625] [2021-11-19 05:12:11,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:11,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:11,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:11,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134200625] [2021-11-19 05:12:11,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134200625] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:11,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553207383] [2021-11-19 05:12:11,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:11,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:11,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:11,279 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:11,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 05:12:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:11,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 05:12:11,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:11,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:11,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:12:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:11,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553207383] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:12:11,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:12:11,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-19 05:12:11,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034001778] [2021-11-19 05:12:11,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:12:11,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 05:12:11,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:11,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 05:12:11,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:12:11,466 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) [2021-11-19 05:12:11,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:11,752 INFO L93 Difference]: Finished difference Result 591 states and 792 transitions. [2021-11-19 05:12:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 05:12:11,753 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 [2021-11-19 05:12:11,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:11,759 INFO L225 Difference]: With dead ends: 591 [2021-11-19 05:12:11,760 INFO L226 Difference]: Without dead ends: 590 [2021-11-19 05:12:11,760 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 [2021-11-19 05:12:11,763 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, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:12:11,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 237 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:12:11,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-11-19 05:12:11,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 521. [2021-11-19 05:12:11,810 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) [2021-11-19 05:12:11,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2021-11-19 05:12:11,818 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 20 [2021-11-19 05:12:11,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:11,820 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2021-11-19 05:12:11,820 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) [2021-11-19 05:12:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2021-11-19 05:12:11,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 05:12:11,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:11,827 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] [2021-11-19 05:12:11,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 05:12:12,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:12,044 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:12,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:12,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2021-11-19 05:12:12,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:12,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733583680] [2021-11-19 05:12:12,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:12,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:12,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:12:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 05:12:12,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:12,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733583680] [2021-11-19 05:12:12,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733583680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:12,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77705873] [2021-11-19 05:12:12,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:12,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:12,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:12,162 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:12,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 05:12:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:12,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 05:12:12,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 05:12:12,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:12:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 05:12:12,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77705873] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:12:12,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:12:12,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-11-19 05:12:12,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518188554] [2021-11-19 05:12:12,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:12:12,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 05:12:12,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:12,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 05:12:12,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-19 05:12:12,493 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) [2021-11-19 05:12:12,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:12,843 INFO L93 Difference]: Finished difference Result 870 states and 1257 transitions. [2021-11-19 05:12:12,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 05:12:12,844 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 [2021-11-19 05:12:12,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:12,851 INFO L225 Difference]: With dead ends: 870 [2021-11-19 05:12:12,852 INFO L226 Difference]: Without dead ends: 868 [2021-11-19 05:12:12,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2021-11-19 05:12:12,854 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, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:12:12,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 140 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:12:12,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-11-19 05:12:12,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 728. [2021-11-19 05:12:12,923 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) [2021-11-19 05:12:12,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 989 transitions. [2021-11-19 05:12:12,932 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 989 transitions. Word has length 24 [2021-11-19 05:12:12,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:12,933 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 989 transitions. [2021-11-19 05:12:12,933 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) [2021-11-19 05:12:12,933 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 989 transitions. [2021-11-19 05:12:12,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 05:12:12,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:12,934 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] [2021-11-19 05:12:12,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 05:12:13,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:13,159 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:13,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:13,159 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2021-11-19 05:12:13,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:13,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870492068] [2021-11-19 05:12:13,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:13,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:13,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:12:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 05:12:13,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:13,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870492068] [2021-11-19 05:12:13,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870492068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:13,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839639248] [2021-11-19 05:12:13,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:13,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:13,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:13,247 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:13,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 05:12:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:13,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 05:12:13,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:13,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 05:12:13,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:12:13,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839639248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:12:13,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:12:13,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-11-19 05:12:13,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328689058] [2021-11-19 05:12:13,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:13,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:12:13,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:13,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:12:13,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:12:13,358 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) [2021-11-19 05:12:13,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:13,471 INFO L93 Difference]: Finished difference Result 737 states and 999 transitions. [2021-11-19 05:12:13,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 05:12:13,472 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 [2021-11-19 05:12:13,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:13,480 INFO L225 Difference]: With dead ends: 737 [2021-11-19 05:12:13,480 INFO L226 Difference]: Without dead ends: 736 [2021-11-19 05:12:13,481 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 [2021-11-19 05:12:13,482 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 [2021-11-19 05:12:13,483 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] [2021-11-19 05:12:13,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-11-19 05:12:13,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 727. [2021-11-19 05:12:13,539 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) [2021-11-19 05:12:13,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 981 transitions. [2021-11-19 05:12:13,548 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 981 transitions. Word has length 25 [2021-11-19 05:12:13,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:13,548 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 981 transitions. [2021-11-19 05:12:13,548 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) [2021-11-19 05:12:13,549 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 981 transitions. [2021-11-19 05:12:13,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 05:12:13,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:13,550 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] [2021-11-19 05:12:13,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 05:12:13,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:13,767 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:13,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:13,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1583952330, now seen corresponding path program 1 times [2021-11-19 05:12:13,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:13,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133164872] [2021-11-19 05:12:13,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:13,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:13,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:12:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 05:12:13,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:13,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133164872] [2021-11-19 05:12:13,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133164872] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:13,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057387707] [2021-11-19 05:12:13,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:13,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:13,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:13,871 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:13,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 05:12:13,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:13,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:12:13,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:14,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:12:14,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:12:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:12:14,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057387707] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:14,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:12:14,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2021-11-19 05:12:14,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504178652] [2021-11-19 05:12:14,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:14,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 05:12:14,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:14,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 05:12:14,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-19 05:12:14,175 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) [2021-11-19 05:12:14,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:14,401 INFO L93 Difference]: Finished difference Result 886 states and 1251 transitions. [2021-11-19 05:12:14,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 05:12:14,402 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 [2021-11-19 05:12:14,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:14,409 INFO L225 Difference]: With dead ends: 886 [2021-11-19 05:12:14,410 INFO L226 Difference]: Without dead ends: 885 [2021-11-19 05:12:14,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:12:14,411 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 [2021-11-19 05:12:14,412 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] [2021-11-19 05:12:14,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-11-19 05:12:14,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 812. [2021-11-19 05:12:14,472 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) [2021-11-19 05:12:14,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1076 transitions. [2021-11-19 05:12:14,482 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1076 transitions. Word has length 28 [2021-11-19 05:12:14,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:14,483 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1076 transitions. [2021-11-19 05:12:14,483 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) [2021-11-19 05:12:14,483 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1076 transitions. [2021-11-19 05:12:14,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-19 05:12:14,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:14,487 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] [2021-11-19 05:12:14,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 05:12:14,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:14,715 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:14,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:14,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1777813581, now seen corresponding path program 1 times [2021-11-19 05:12:14,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:14,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138298140] [2021-11-19 05:12:14,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:14,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:14,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:12:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:14,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:12:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:12:14,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:14,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138298140] [2021-11-19 05:12:14,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138298140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:14,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821242821] [2021-11-19 05:12:14,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:14,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:14,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:14,856 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:14,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 05:12:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:14,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 05:12:14,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:12:14,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:12:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:12:15,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821242821] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:12:15,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:12:15,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-11-19 05:12:15,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947055841] [2021-11-19 05:12:15,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:12:15,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:12:15,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:15,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:12:15,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:12:15,235 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) [2021-11-19 05:12:15,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:15,827 INFO L93 Difference]: Finished difference Result 1503 states and 2506 transitions. [2021-11-19 05:12:15,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 05:12:15,827 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 [2021-11-19 05:12:15,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:15,843 INFO L225 Difference]: With dead ends: 1503 [2021-11-19 05:12:15,843 INFO L226 Difference]: Without dead ends: 1501 [2021-11-19 05:12:15,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-11-19 05:12:15,846 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 146 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2021-11-19 05:12:15,846 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] [2021-11-19 05:12:15,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2021-11-19 05:12:15,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1258. [2021-11-19 05:12:15,973 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) [2021-11-19 05:12:15,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1844 transitions. [2021-11-19 05:12:15,988 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1844 transitions. Word has length 33 [2021-11-19 05:12:15,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:15,988 INFO L470 AbstractCegarLoop]: Abstraction has 1258 states and 1844 transitions. [2021-11-19 05:12:15,988 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) [2021-11-19 05:12:15,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1844 transitions. [2021-11-19 05:12:15,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 05:12:15,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:15,990 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] [2021-11-19 05:12:16,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 05:12:16,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-19 05:12:16,219 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:16,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:16,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1227703372, now seen corresponding path program 2 times [2021-11-19 05:12:16,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:16,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940166015] [2021-11-19 05:12:16,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:16,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:16,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:12:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:12:16,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:16,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940166015] [2021-11-19 05:12:16,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940166015] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:16,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252372853] [2021-11-19 05:12:16,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:12:16,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:16,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:16,336 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:16,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 05:12:16,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:12:16,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:12:16,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 05:12:16,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:12:16,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:12:16,682 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:12:16,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252372853] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:12:16,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:12:16,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-11-19 05:12:16,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182034253] [2021-11-19 05:12:16,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:12:16,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:12:16,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:16,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:12:16,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:12:16,685 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) [2021-11-19 05:12:17,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:17,345 INFO L93 Difference]: Finished difference Result 2355 states and 3821 transitions. [2021-11-19 05:12:17,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 05:12:17,346 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 [2021-11-19 05:12:17,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:17,377 INFO L225 Difference]: With dead ends: 2355 [2021-11-19 05:12:17,377 INFO L226 Difference]: Without dead ends: 2338 [2021-11-19 05:12:17,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=1009, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 05:12:17,383 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 266 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:12:17,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 162 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:12:17,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2021-11-19 05:12:17,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 1753. [2021-11-19 05:12:17,574 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) [2021-11-19 05:12:17,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2628 transitions. [2021-11-19 05:12:17,594 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2628 transitions. Word has length 36 [2021-11-19 05:12:17,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:17,595 INFO L470 AbstractCegarLoop]: Abstraction has 1753 states and 2628 transitions. [2021-11-19 05:12:17,595 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) [2021-11-19 05:12:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2628 transitions. [2021-11-19 05:12:17,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 05:12:17,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:17,598 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] [2021-11-19 05:12:17,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 05:12:17,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-19 05:12:17,811 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:17,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:17,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1699542727, now seen corresponding path program 1 times [2021-11-19 05:12:17,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:17,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450943553] [2021-11-19 05:12:17,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:17,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:17,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:12:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:17,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:12:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:12:17,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:17,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450943553] [2021-11-19 05:12:17,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450943553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:17,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338031801] [2021-11-19 05:12:17,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:17,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:17,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:17,911 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:17,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 05:12:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:17,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 05:12:17,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:12:18,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:12:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:12:18,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338031801] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:18,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:12:18,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2021-11-19 05:12:18,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366672613] [2021-11-19 05:12:18,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:12:18,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:12:18,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:18,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:12:18,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:12:18,345 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) [2021-11-19 05:12:18,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:18,656 INFO L93 Difference]: Finished difference Result 1910 states and 3114 transitions. [2021-11-19 05:12:18,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 05:12:18,657 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 [2021-11-19 05:12:18,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:18,675 INFO L225 Difference]: With dead ends: 1910 [2021-11-19 05:12:18,675 INFO L226 Difference]: Without dead ends: 1909 [2021-11-19 05:12:18,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-11-19 05:12:18,678 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 [2021-11-19 05:12:18,679 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] [2021-11-19 05:12:18,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2021-11-19 05:12:18,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1734. [2021-11-19 05:12:18,822 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) [2021-11-19 05:12:18,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2480 transitions. [2021-11-19 05:12:18,834 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2480 transitions. Word has length 37 [2021-11-19 05:12:18,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:18,835 INFO L470 AbstractCegarLoop]: Abstraction has 1734 states and 2480 transitions. [2021-11-19 05:12:18,835 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) [2021-11-19 05:12:18,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2480 transitions. [2021-11-19 05:12:18,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 05:12:18,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:18,838 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] [2021-11-19 05:12:18,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 05:12:19,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-19 05:12:19,051 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:19,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:19,051 INFO L85 PathProgramCache]: Analyzing trace with hash 865218898, now seen corresponding path program 1 times [2021-11-19 05:12:19,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:19,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540045112] [2021-11-19 05:12:19,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:19,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:19,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:12:19,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:19,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:12:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:19,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 05:12:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:12:19,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:19,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540045112] [2021-11-19 05:12:19,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540045112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:19,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183145888] [2021-11-19 05:12:19,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:19,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:19,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:19,129 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:19,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 05:12:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:19,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 05:12:19,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 05:12:19,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:12:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 05:12:19,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183145888] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:12:19,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:12:19,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2021-11-19 05:12:19,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170529624] [2021-11-19 05:12:19,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:12:19,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 05:12:19,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:19,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 05:12:19,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:12:19,525 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) [2021-11-19 05:12:19,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:19,718 INFO L93 Difference]: Finished difference Result 2467 states and 3685 transitions. [2021-11-19 05:12:19,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 05:12:19,719 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 [2021-11-19 05:12:19,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:19,764 INFO L225 Difference]: With dead ends: 2467 [2021-11-19 05:12:19,764 INFO L226 Difference]: Without dead ends: 869 [2021-11-19 05:12:19,779 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 [2021-11-19 05:12:19,781 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 53 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:12:19,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 107 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:12:19,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-11-19 05:12:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 850. [2021-11-19 05:12:19,852 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) [2021-11-19 05:12:19,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1115 transitions. [2021-11-19 05:12:19,858 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1115 transitions. Word has length 43 [2021-11-19 05:12:19,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:19,860 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 1115 transitions. [2021-11-19 05:12:19,860 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) [2021-11-19 05:12:19,860 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1115 transitions. [2021-11-19 05:12:19,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 05:12:19,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:19,862 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:19,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 05:12:20,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-19 05:12:20,091 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:20,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:20,091 INFO L85 PathProgramCache]: Analyzing trace with hash -151680771, now seen corresponding path program 2 times [2021-11-19 05:12:20,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:20,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656939290] [2021-11-19 05:12:20,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:20,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:20,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:20,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656939290] [2021-11-19 05:12:20,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656939290] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:20,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517306437] [2021-11-19 05:12:20,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:12:20,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:20,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:20,215 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:20,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 05:12:20,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:12:20,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:12:20,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 05:12:20,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:20,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:12:20,607 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:12:20,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517306437] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:12:20,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:12:20,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-19 05:12:20,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592954812] [2021-11-19 05:12:20,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:12:20,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 05:12:20,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:20,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 05:12:20,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-11-19 05:12:20,611 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) [2021-11-19 05:12:21,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:21,233 INFO L93 Difference]: Finished difference Result 1623 states and 2347 transitions. [2021-11-19 05:12:21,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:12:21,234 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 [2021-11-19 05:12:21,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:21,247 INFO L225 Difference]: With dead ends: 1623 [2021-11-19 05:12:21,247 INFO L226 Difference]: Without dead ends: 1622 [2021-11-19 05:12:21,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 05:12:21,250 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 419 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:12:21,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 379 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:12:21,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-11-19 05:12:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1510. [2021-11-19 05:12:21,358 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) [2021-11-19 05:12:21,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 1955 transitions. [2021-11-19 05:12:21,366 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 1955 transitions. Word has length 44 [2021-11-19 05:12:21,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:21,366 INFO L470 AbstractCegarLoop]: Abstraction has 1510 states and 1955 transitions. [2021-11-19 05:12:21,366 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) [2021-11-19 05:12:21,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 1955 transitions. [2021-11-19 05:12:21,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 05:12:21,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:21,369 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] [2021-11-19 05:12:21,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 05:12:21,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-19 05:12:21,594 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:21,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:21,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1560392739, now seen corresponding path program 2 times [2021-11-19 05:12:21,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:21,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429143783] [2021-11-19 05:12:21,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:21,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:21,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:12:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:21,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:12:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:12:21,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:21,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429143783] [2021-11-19 05:12:21,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429143783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:21,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694516631] [2021-11-19 05:12:21,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:12:21,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:21,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:21,711 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:21,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 05:12:21,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:12:21,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:12:21,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 05:12:21,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:12:21,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:12:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:12:22,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694516631] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:12:22,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:12:22,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2021-11-19 05:12:22,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068894084] [2021-11-19 05:12:22,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:12:22,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 05:12:22,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:22,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 05:12:22,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:12:22,131 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) [2021-11-19 05:12:23,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:23,309 INFO L93 Difference]: Finished difference Result 3056 states and 4731 transitions. [2021-11-19 05:12:23,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 05:12:23,309 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 [2021-11-19 05:12:23,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:23,328 INFO L225 Difference]: With dead ends: 3056 [2021-11-19 05:12:23,329 INFO L226 Difference]: Without dead ends: 2163 [2021-11-19 05:12:23,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=508, Invalid=1748, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 05:12:23,340 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 203 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:12:23,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 298 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 05:12:23,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-11-19 05:12:23,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1621. [2021-11-19 05:12:23,501 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) [2021-11-19 05:12:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2084 transitions. [2021-11-19 05:12:23,510 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2084 transitions. Word has length 45 [2021-11-19 05:12:23,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:23,511 INFO L470 AbstractCegarLoop]: Abstraction has 1621 states and 2084 transitions. [2021-11-19 05:12:23,511 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) [2021-11-19 05:12:23,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2084 transitions. [2021-11-19 05:12:23,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 05:12:23,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:23,513 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] [2021-11-19 05:12:23,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-19 05:12:23,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:23,739 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:23,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:23,739 INFO L85 PathProgramCache]: Analyzing trace with hash 442862615, now seen corresponding path program 1 times [2021-11-19 05:12:23,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:23,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427905432] [2021-11-19 05:12:23,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:23,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:23,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:12:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:23,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:12:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:23,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:12:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:23,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 05:12:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 05:12:23,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:23,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427905432] [2021-11-19 05:12:23,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427905432] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:23,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491108122] [2021-11-19 05:12:23,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:23,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:23,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:23,899 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:23,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 05:12:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:23,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 05:12:23,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 05:12:24,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:12:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 05:12:24,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491108122] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:12:24,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:12:24,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2021-11-19 05:12:24,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129790816] [2021-11-19 05:12:24,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:12:24,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 05:12:24,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:24,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 05:12:24,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-11-19 05:12:24,607 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) [2021-11-19 05:12:26,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:26,168 INFO L93 Difference]: Finished difference Result 4064 states and 7465 transitions. [2021-11-19 05:12:26,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-19 05:12:26,168 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 [2021-11-19 05:12:26,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:26,221 INFO L225 Difference]: With dead ends: 4064 [2021-11-19 05:12:26,221 INFO L226 Difference]: Without dead ends: 4060 [2021-11-19 05:12:26,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1682 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1158, Invalid=5004, Unknown=0, NotChecked=0, Total=6162 [2021-11-19 05:12:26,228 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 145 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:12:26,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 246 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 05:12:26,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4060 states. [2021-11-19 05:12:26,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4060 to 2916. [2021-11-19 05:12:26,577 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) [2021-11-19 05:12:26,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 5949 transitions. [2021-11-19 05:12:26,601 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 5949 transitions. Word has length 52 [2021-11-19 05:12:26,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:26,601 INFO L470 AbstractCegarLoop]: Abstraction has 2916 states and 5949 transitions. [2021-11-19 05:12:26,601 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) [2021-11-19 05:12:26,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 5949 transitions. [2021-11-19 05:12:26,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 05:12:26,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:26,605 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:26,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 05:12:26,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-19 05:12:26,827 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:26,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:26,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1991697283, now seen corresponding path program 1 times [2021-11-19 05:12:26,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:26,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400152695] [2021-11-19 05:12:26,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:26,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 05:12:26,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:26,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400152695] [2021-11-19 05:12:26,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400152695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:26,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818142889] [2021-11-19 05:12:26,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:26,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:26,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:26,961 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:26,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 05:12:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:27,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 05:12:27,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 05:12:27,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:12:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 05:12:27,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818142889] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:12:27,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:12:27,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-19 05:12:27,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044169774] [2021-11-19 05:12:27,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:12:27,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 05:12:27,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:27,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 05:12:27,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-11-19 05:12:27,482 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) [2021-11-19 05:12:28,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:28,569 INFO L93 Difference]: Finished difference Result 7961 states and 16550 transitions. [2021-11-19 05:12:28,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:12:28,570 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 [2021-11-19 05:12:28,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:28,724 INFO L225 Difference]: With dead ends: 7961 [2021-11-19 05:12:28,724 INFO L226 Difference]: Without dead ends: 7960 [2021-11-19 05:12:28,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 05:12:28,729 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 891 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:12:28,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 323 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 05:12:28,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7960 states. [2021-11-19 05:12:29,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7960 to 7884. [2021-11-19 05:12:29,577 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) [2021-11-19 05:12:29,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7884 states to 7884 states and 16119 transitions. [2021-11-19 05:12:29,668 INFO L78 Accepts]: Start accepts. Automaton has 7884 states and 16119 transitions. Word has length 58 [2021-11-19 05:12:29,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:29,668 INFO L470 AbstractCegarLoop]: Abstraction has 7884 states and 16119 transitions. [2021-11-19 05:12:29,669 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) [2021-11-19 05:12:29,669 INFO L276 IsEmpty]: Start isEmpty. Operand 7884 states and 16119 transitions. [2021-11-19 05:12:29,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 05:12:29,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:29,673 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] [2021-11-19 05:12:29,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 05:12:29,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:29,887 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:29,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:29,887 INFO L85 PathProgramCache]: Analyzing trace with hash 526800899, now seen corresponding path program 1 times [2021-11-19 05:12:29,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:29,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809242361] [2021-11-19 05:12:29,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:29,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:29,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:12:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:29,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:12:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:29,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:12:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:30,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 05:12:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 05:12:30,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:30,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809242361] [2021-11-19 05:12:30,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809242361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:30,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020698586] [2021-11-19 05:12:30,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:30,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:30,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:30,047 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:30,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 05:12:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:30,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 05:12:30,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 05:12:30,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:12:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 05:12:30,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020698586] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:12:30,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:12:30,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2021-11-19 05:12:30,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048211894] [2021-11-19 05:12:30,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:12:30,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 05:12:30,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:30,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 05:12:30,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-11-19 05:12:30,893 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) [2021-11-19 05:12:34,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:34,259 INFO L93 Difference]: Finished difference Result 29449 states and 111079 transitions. [2021-11-19 05:12:34,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-19 05:12:34,259 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 [2021-11-19 05:12:34,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:34,758 INFO L225 Difference]: With dead ends: 29449 [2021-11-19 05:12:34,759 INFO L226 Difference]: Without dead ends: 22920 [2021-11-19 05:12:34,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1251, Invalid=4755, Unknown=0, NotChecked=0, Total=6006 [2021-11-19 05:12:34,958 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 106 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:12:34,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 297 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 05:12:34,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22920 states. [2021-11-19 05:12:38,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22920 to 16604. [2021-11-19 05:12:38,185 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) [2021-11-19 05:12:38,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16604 states to 16604 states and 59949 transitions. [2021-11-19 05:12:38,627 INFO L78 Accepts]: Start accepts. Automaton has 16604 states and 59949 transitions. Word has length 56 [2021-11-19 05:12:38,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:38,628 INFO L470 AbstractCegarLoop]: Abstraction has 16604 states and 59949 transitions. [2021-11-19 05:12:38,628 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) [2021-11-19 05:12:38,628 INFO L276 IsEmpty]: Start isEmpty. Operand 16604 states and 59949 transitions. [2021-11-19 05:12:38,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-19 05:12:38,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:38,632 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:38,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-19 05:12:38,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:38,859 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:38,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:38,859 INFO L85 PathProgramCache]: Analyzing trace with hash -2027008992, now seen corresponding path program 2 times [2021-11-19 05:12:38,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:38,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167257174] [2021-11-19 05:12:38,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:38,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:38,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 05:12:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:38,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:12:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:39,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:12:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:39,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:12:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:39,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 05:12:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 89 proven. 17 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-19 05:12:39,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:39,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167257174] [2021-11-19 05:12:39,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167257174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:39,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826179379] [2021-11-19 05:12:39,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:12:39,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:39,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:39,106 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:39,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 05:12:39,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:12:39,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:12:39,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 05:12:39,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 78 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-19 05:12:39,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:12:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 97 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-19 05:12:40,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826179379] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:12:40,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:12:40,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2021-11-19 05:12:40,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463634691] [2021-11-19 05:12:40,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:12:40,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-19 05:12:40,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:40,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-19 05:12:40,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 05:12:40,379 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) [2021-11-19 05:12:42,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:42,212 INFO L93 Difference]: Finished difference Result 25458 states and 94365 transitions. [2021-11-19 05:12:42,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 05:12:42,213 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 81 [2021-11-19 05:12:42,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:42,288 INFO L225 Difference]: With dead ends: 25458 [2021-11-19 05:12:42,289 INFO L226 Difference]: Without dead ends: 10209 [2021-11-19 05:12:42,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=673, Invalid=2633, Unknown=0, NotChecked=0, Total=3306 [2021-11-19 05:12:42,548 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 174 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:12:42,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 319 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:12:42,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10209 states. [2021-11-19 05:12:43,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10209 to 9706. [2021-11-19 05:12:43,525 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) [2021-11-19 05:12:43,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9706 states to 9706 states and 15639 transitions. [2021-11-19 05:12:43,600 INFO L78 Accepts]: Start accepts. Automaton has 9706 states and 15639 transitions. Word has length 81 [2021-11-19 05:12:43,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:43,601 INFO L470 AbstractCegarLoop]: Abstraction has 9706 states and 15639 transitions. [2021-11-19 05:12:43,601 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) [2021-11-19 05:12:43,602 INFO L276 IsEmpty]: Start isEmpty. Operand 9706 states and 15639 transitions. [2021-11-19 05:12:43,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 05:12:43,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:43,606 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] [2021-11-19 05:12:43,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-19 05:12:43,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-19 05:12:43,835 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:43,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:43,835 INFO L85 PathProgramCache]: Analyzing trace with hash -131434271, now seen corresponding path program 3 times [2021-11-19 05:12:43,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:43,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295621587] [2021-11-19 05:12:43,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:43,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:43,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:12:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:43,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:12:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:12:43,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:43,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295621587] [2021-11-19 05:12:43,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295621587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:43,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802149819] [2021-11-19 05:12:43,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:12:43,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:43,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:43,987 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:44,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 05:12:44,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-19 05:12:44,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:12:44,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 05:12:44,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:44,230 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:12:44,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:12:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 65 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:12:44,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802149819] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:12:44,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:12:44,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2021-11-19 05:12:44,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116663682] [2021-11-19 05:12:44,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:12:44,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-19 05:12:44,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:44,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-19 05:12:44,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 05:12:44,705 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) [2021-11-19 05:12:46,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:46,083 INFO L93 Difference]: Finished difference Result 10357 states and 16637 transitions. [2021-11-19 05:12:46,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 05:12:46,084 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 [2021-11-19 05:12:46,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:46,139 INFO L225 Difference]: With dead ends: 10357 [2021-11-19 05:12:46,139 INFO L226 Difference]: Without dead ends: 10356 [2021-11-19 05:12:46,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=577, Invalid=1973, Unknown=0, NotChecked=0, Total=2550 [2021-11-19 05:12:46,148 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 259 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:12:46,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 277 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:12:46,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10356 states. [2021-11-19 05:12:46,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10356 to 9814. [2021-11-19 05:12:46,812 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) [2021-11-19 05:12:46,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9814 states to 9814 states and 15779 transitions. [2021-11-19 05:12:46,874 INFO L78 Accepts]: Start accepts. Automaton has 9814 states and 15779 transitions. Word has length 69 [2021-11-19 05:12:46,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:46,875 INFO L470 AbstractCegarLoop]: Abstraction has 9814 states and 15779 transitions. [2021-11-19 05:12:46,875 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) [2021-11-19 05:12:46,875 INFO L276 IsEmpty]: Start isEmpty. Operand 9814 states and 15779 transitions. [2021-11-19 05:12:46,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 05:12:46,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:46,880 INFO L514 BasicCegarLoop]: trace histogram [13, 9, 7, 7, 7, 7, 7, 7, 7, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:46,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-19 05:12:47,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-19 05:12:47,107 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:47,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:47,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1980612256, now seen corresponding path program 2 times [2021-11-19 05:12:47,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:47,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072137553] [2021-11-19 05:12:47,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:47,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:47,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 05:12:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:47,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:12:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:47,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:12:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:47,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:12:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:47,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:12:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:47,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 05:12:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:47,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-19 05:12:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 154 proven. 24 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-19 05:12:47,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:47,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072137553] [2021-11-19 05:12:47,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072137553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:47,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275255743] [2021-11-19 05:12:47,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:12:47,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:47,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:47,255 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:47,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-19 05:12:47,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:12:47,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:12:47,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 05:12:47,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 154 proven. 15 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-19 05:12:47,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:12:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 154 proven. 26 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-11-19 05:12:48,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275255743] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:12:48,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:12:48,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2021-11-19 05:12:48,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185315749] [2021-11-19 05:12:48,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:12:48,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 05:12:48,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:48,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 05:12:48,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-19 05:12:48,083 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) [2021-11-19 05:12:48,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:48,668 INFO L93 Difference]: Finished difference Result 18932 states and 34355 transitions. [2021-11-19 05:12:48,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 05:12:48,669 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 112 [2021-11-19 05:12:48,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:48,734 INFO L225 Difference]: With dead ends: 18932 [2021-11-19 05:12:48,735 INFO L226 Difference]: Without dead ends: 10758 [2021-11-19 05:12:48,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 233 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:12:48,794 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 74 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:12:48,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 101 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:12:48,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10758 states. [2021-11-19 05:12:49,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10758 to 9808. [2021-11-19 05:12:49,704 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) [2021-11-19 05:12:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9808 states to 9808 states and 15693 transitions. [2021-11-19 05:12:49,778 INFO L78 Accepts]: Start accepts. Automaton has 9808 states and 15693 transitions. Word has length 112 [2021-11-19 05:12:49,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:49,778 INFO L470 AbstractCegarLoop]: Abstraction has 9808 states and 15693 transitions. [2021-11-19 05:12:49,779 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) [2021-11-19 05:12:49,779 INFO L276 IsEmpty]: Start isEmpty. Operand 9808 states and 15693 transitions. [2021-11-19 05:12:49,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 05:12:49,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:49,788 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] [2021-11-19 05:12:49,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-19 05:12:50,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:50,003 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:50,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:50,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1897499616, now seen corresponding path program 3 times [2021-11-19 05:12:50,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:50,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012821486] [2021-11-19 05:12:50,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:50,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:50,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:12:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:50,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:12:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:50,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:12:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:50,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:12:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:50,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:12:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:50,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:12:50,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:50,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 05:12:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:50,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-19 05:12:50,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:50,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 05:12:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 113 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-19 05:12:50,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:50,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012821486] [2021-11-19 05:12:50,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012821486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:50,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457020136] [2021-11-19 05:12:50,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:12:50,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:50,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:50,218 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:50,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-19 05:12:50,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-19 05:12:50,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:12:50,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 05:12:50,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 150 proven. 26 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 05:12:50,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:12:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 119 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 05:12:51,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457020136] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:12:51,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:12:51,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2021-11-19 05:12:51,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439838971] [2021-11-19 05:12:51,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:12:51,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 05:12:51,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:51,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 05:12:51,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-19 05:12:51,395 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) [2021-11-19 05:12:52,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:52,270 INFO L93 Difference]: Finished difference Result 20497 states and 41620 transitions. [2021-11-19 05:12:52,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 05:12:52,271 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 [2021-11-19 05:12:52,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:52,351 INFO L225 Difference]: With dead ends: 20497 [2021-11-19 05:12:52,352 INFO L226 Difference]: Without dead ends: 12358 [2021-11-19 05:12:52,413 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 [2021-11-19 05:12:52,414 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 67 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:12:52,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 162 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:12:52,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12358 states. [2021-11-19 05:12:53,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12358 to 11997. [2021-11-19 05:12:53,279 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) [2021-11-19 05:12:53,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11997 states to 11997 states and 19076 transitions. [2021-11-19 05:12:53,335 INFO L78 Accepts]: Start accepts. Automaton has 11997 states and 19076 transitions. Word has length 99 [2021-11-19 05:12:53,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:53,336 INFO L470 AbstractCegarLoop]: Abstraction has 11997 states and 19076 transitions. [2021-11-19 05:12:53,336 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) [2021-11-19 05:12:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 11997 states and 19076 transitions. [2021-11-19 05:12:53,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 05:12:53,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:53,347 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] [2021-11-19 05:12:53,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-19 05:12:53,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-19 05:12:53,563 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:53,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:53,563 INFO L85 PathProgramCache]: Analyzing trace with hash -127918165, now seen corresponding path program 3 times [2021-11-19 05:12:53,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:53,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626286182] [2021-11-19 05:12:53,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:53,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:53,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:53,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:12:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:53,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:12:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:53,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:12:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:53,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 05:12:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 122 proven. 90 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 05:12:53,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:53,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626286182] [2021-11-19 05:12:53,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626286182] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:53,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699922855] [2021-11-19 05:12:53,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:12:53,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:53,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:53,918 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:53,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-19 05:12:54,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-19 05:12:54,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:12:54,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-19 05:12:54,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 119 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-19 05:12:54,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:12:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-19 05:12:54,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699922855] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:12:54,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:12:54,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2021-11-19 05:12:54,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791209330] [2021-11-19 05:12:54,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:12:54,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-19 05:12:54,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:54,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-19 05:12:54,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-11-19 05:12:54,559 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) [2021-11-19 05:12:56,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:56,507 INFO L93 Difference]: Finished difference Result 20852 states and 35642 transitions. [2021-11-19 05:12:56,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-19 05:12:56,508 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 [2021-11-19 05:12:56,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:56,563 INFO L225 Difference]: With dead ends: 20852 [2021-11-19 05:12:56,563 INFO L226 Difference]: Without dead ends: 10359 [2021-11-19 05:12:56,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=989, Invalid=3433, Unknown=0, NotChecked=0, Total=4422 [2021-11-19 05:12:56,640 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 218 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:12:56,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 152 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 05:12:56,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10359 states. [2021-11-19 05:12:57,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10359 to 8741. [2021-11-19 05:12:57,326 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) [2021-11-19 05:12:57,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8741 states to 8741 states and 12053 transitions. [2021-11-19 05:12:57,352 INFO L78 Accepts]: Start accepts. Automaton has 8741 states and 12053 transitions. Word has length 88 [2021-11-19 05:12:57,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:57,353 INFO L470 AbstractCegarLoop]: Abstraction has 8741 states and 12053 transitions. [2021-11-19 05:12:57,353 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) [2021-11-19 05:12:57,353 INFO L276 IsEmpty]: Start isEmpty. Operand 8741 states and 12053 transitions. [2021-11-19 05:12:57,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-19 05:12:57,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:57,359 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] [2021-11-19 05:12:57,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-19 05:12:57,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:57,579 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:12:57,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:57,579 INFO L85 PathProgramCache]: Analyzing trace with hash -635779733, now seen corresponding path program 4 times [2021-11-19 05:12:57,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:57,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643573667] [2021-11-19 05:12:57,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:57,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:57,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:12:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:57,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:12:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:57,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:12:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:57,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:12:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:57,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:12:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:57,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 05:12:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:57,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-19 05:12:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:57,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-19 05:12:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 51 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-19 05:12:57,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:57,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643573667] [2021-11-19 05:12:57,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643573667] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:57,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168990313] [2021-11-19 05:12:57,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 05:12:57,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:57,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:57,839 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:57,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-19 05:12:57,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 05:12:57,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:12:57,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-19 05:12:57,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 67 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-19 05:12:58,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:12:59,511 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 42 proven. 89 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 05:12:59,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168990313] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:12:59,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:12:59,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2021-11-19 05:12:59,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070010482] [2021-11-19 05:12:59,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:12:59,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-19 05:12:59,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:59,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-19 05:12:59,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 05:12:59,515 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) [2021-11-19 05:13:04,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:13:04,169 INFO L93 Difference]: Finished difference Result 29169 states and 46148 transitions. [2021-11-19 05:13:04,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-11-19 05:13:04,170 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 [2021-11-19 05:13:04,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:13:04,346 INFO L225 Difference]: With dead ends: 29169 [2021-11-19 05:13:04,347 INFO L226 Difference]: Without dead ends: 28067 [2021-11-19 05:13:04,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12258 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5458, Invalid=27122, Unknown=0, NotChecked=0, Total=32580 [2021-11-19 05:13:04,384 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 272 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 1351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 2625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1351 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:13:04,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 331 Invalid, 2625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1351 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 05:13:04,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28067 states. [2021-11-19 05:13:05,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28067 to 17311. [2021-11-19 05:13:05,893 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) [2021-11-19 05:13:05,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17311 states to 17311 states and 26931 transitions. [2021-11-19 05:13:05,988 INFO L78 Accepts]: Start accepts. Automaton has 17311 states and 26931 transitions. Word has length 90 [2021-11-19 05:13:05,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:13:05,989 INFO L470 AbstractCegarLoop]: Abstraction has 17311 states and 26931 transitions. [2021-11-19 05:13:05,989 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) [2021-11-19 05:13:05,989 INFO L276 IsEmpty]: Start isEmpty. Operand 17311 states and 26931 transitions. [2021-11-19 05:13:05,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-19 05:13:05,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:13:05,996 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2021-11-19 05:13:06,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-19 05:13:06,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-19 05:13:06,223 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:13:06,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:13:06,223 INFO L85 PathProgramCache]: Analyzing trace with hash 147414137, now seen corresponding path program 3 times [2021-11-19 05:13:06,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:13:06,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210989888] [2021-11-19 05:13:06,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:13:06,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:13:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:13:06,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:13:06,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210989888] [2021-11-19 05:13:06,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210989888] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:13:06,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615180085] [2021-11-19 05:13:06,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:13:06,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:13:06,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:13:06,507 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:13:06,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-19 05:13:06,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-19 05:13:06,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:13:06,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 05:13:06,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:13:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:13:06,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:13:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:13:07,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615180085] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:13:07,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:13:07,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-11-19 05:13:07,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67004937] [2021-11-19 05:13:07,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:13:07,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-19 05:13:07,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:13:07,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-19 05:13:07,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 05:13:07,446 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) [2021-11-19 05:13:10,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:13:10,121 INFO L93 Difference]: Finished difference Result 28628 states and 44547 transitions. [2021-11-19 05:13:10,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-19 05:13:10,123 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 [2021-11-19 05:13:10,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:13:10,273 INFO L225 Difference]: With dead ends: 28628 [2021-11-19 05:13:10,273 INFO L226 Difference]: Without dead ends: 28627 [2021-11-19 05:13:10,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2021-11-19 05:13:10,292 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 1111 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 643 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 643 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:13:10,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1115 Valid, 747 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [643 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 05:13:10,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28627 states. [2021-11-19 05:13:12,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28627 to 28627. [2021-11-19 05:13:12,265 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) [2021-11-19 05:13:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28627 states to 28627 states and 44535 transitions. [2021-11-19 05:13:12,382 INFO L78 Accepts]: Start accepts. Automaton has 28627 states and 44535 transitions. Word has length 92 [2021-11-19 05:13:12,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:13:12,382 INFO L470 AbstractCegarLoop]: Abstraction has 28627 states and 44535 transitions. [2021-11-19 05:13:12,383 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) [2021-11-19 05:13:12,383 INFO L276 IsEmpty]: Start isEmpty. Operand 28627 states and 44535 transitions. [2021-11-19 05:13:12,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 05:13:12,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:13:12,403 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-11-19 05:13:12,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-19 05:13:12,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-19 05:13:12,631 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:13:12,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:13:12,631 INFO L85 PathProgramCache]: Analyzing trace with hash -570444405, now seen corresponding path program 2 times [2021-11-19 05:13:12,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:13:12,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682540870] [2021-11-19 05:13:12,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:13:12,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:13:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 05:13:12,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:13:12,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682540870] [2021-11-19 05:13:12,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682540870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:13:12,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249196558] [2021-11-19 05:13:12,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:13:12,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:13:12,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:13:12,975 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:13:12,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-19 05:13:13,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:13:13,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:13:13,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-19 05:13:13,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:13:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 05:13:13,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:13:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 05:13:14,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249196558] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:13:14,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:13:14,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-11-19 05:13:14,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032439338] [2021-11-19 05:13:14,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:13:14,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-19 05:13:14,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:13:14,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-19 05:13:14,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 05:13:14,193 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) [2021-11-19 05:13:19,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:13:19,269 INFO L93 Difference]: Finished difference Result 64728 states and 101341 transitions. [2021-11-19 05:13:19,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-19 05:13:19,269 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 [2021-11-19 05:13:19,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:13:19,589 INFO L225 Difference]: With dead ends: 64728 [2021-11-19 05:13:19,589 INFO L226 Difference]: Without dead ends: 64727 [2021-11-19 05:13:19,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2021-11-19 05:13:19,618 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1948 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 711 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1951 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 1715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 711 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:13:19,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1951 Valid, 593 Invalid, 1715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [711 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 05:13:19,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64727 states. [2021-11-19 05:13:24,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64727 to 64675. [2021-11-19 05:13:24,099 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) [2021-11-19 05:13:24,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64675 states to 64675 states and 101319 transitions. [2021-11-19 05:13:24,395 INFO L78 Accepts]: Start accepts. Automaton has 64675 states and 101319 transitions. Word has length 142 [2021-11-19 05:13:24,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:13:24,396 INFO L470 AbstractCegarLoop]: Abstraction has 64675 states and 101319 transitions. [2021-11-19 05:13:24,396 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) [2021-11-19 05:13:24,396 INFO L276 IsEmpty]: Start isEmpty. Operand 64675 states and 101319 transitions. [2021-11-19 05:13:24,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-19 05:13:24,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:13:24,433 INFO L514 BasicCegarLoop]: trace histogram [27, 20, 17, 16, 16, 16, 15, 15, 15, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-19 05:13:24,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-19 05:13:24,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-19 05:13:24,659 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:13:24,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:13:24,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1123873925, now seen corresponding path program 1 times [2021-11-19 05:13:24,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:13:24,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070606137] [2021-11-19 05:13:24,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:13:24,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:13:24,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:24,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-19 05:13:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:24,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:13:24,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:24,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:13:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:24,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:13:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:24,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:13:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:24,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:13:24,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:24,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 05:13:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:24,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-19 05:13:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:25,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:13:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:25,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:13:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:25,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:13:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:25,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:13:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:25,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:13:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:25,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 05:13:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:25,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-19 05:13:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:25,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-19 05:13:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:25,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-19 05:13:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1857 backedges. 673 proven. 214 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2021-11-19 05:13:25,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:13:25,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070606137] [2021-11-19 05:13:25,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070606137] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:13:25,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311875633] [2021-11-19 05:13:25,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:13:25,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:13:25,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:13:25,143 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:13:25,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-19 05:13:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:25,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 05:13:25,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:13:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1857 backedges. 661 proven. 216 refuted. 0 times theorem prover too weak. 980 trivial. 0 not checked. [2021-11-19 05:13:25,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:13:28,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1857 backedges. 677 proven. 263 refuted. 0 times theorem prover too weak. 917 trivial. 0 not checked. [2021-11-19 05:13:28,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311875633] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:13:28,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:13:28,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 21] total 27 [2021-11-19 05:13:28,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030639158] [2021-11-19 05:13:28,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:13:28,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 05:13:28,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:13:28,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 05:13:28,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-11-19 05:13:28,549 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) [2021-11-19 05:13:35,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:13:35,011 INFO L93 Difference]: Finished difference Result 152847 states and 310280 transitions. [2021-11-19 05:13:35,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 05:13:35,012 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 241 [2021-11-19 05:13:35,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:13:35,731 INFO L225 Difference]: With dead ends: 152847 [2021-11-19 05:13:35,731 INFO L226 Difference]: Without dead ends: 94875 [2021-11-19 05:13:36,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 512 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=423, Invalid=1557, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 05:13:36,545 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 102 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:13:36,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 244 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:13:36,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94875 states. [2021-11-19 05:13:42,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94875 to 64457. [2021-11-19 05:13:42,684 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) [2021-11-19 05:13:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64457 states to 64457 states and 101034 transitions. [2021-11-19 05:13:42,993 INFO L78 Accepts]: Start accepts. Automaton has 64457 states and 101034 transitions. Word has length 241 [2021-11-19 05:13:42,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:13:42,993 INFO L470 AbstractCegarLoop]: Abstraction has 64457 states and 101034 transitions. [2021-11-19 05:13:42,994 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) [2021-11-19 05:13:42,994 INFO L276 IsEmpty]: Start isEmpty. Operand 64457 states and 101034 transitions. [2021-11-19 05:13:43,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-19 05:13:43,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:13:43,023 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] [2021-11-19 05:13:43,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-19 05:13:43,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-19 05:13:43,243 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-19 05:13:43,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:13:43,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1557868018, now seen corresponding path program 5 times [2021-11-19 05:13:43,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:13:43,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140067513] [2021-11-19 05:13:43,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:13:43,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:13:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:43,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 05:13:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:43,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:13:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:43,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:13:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:43,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:13:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:43,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 05:13:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:43,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-19 05:13:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:43,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:13:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:43,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:13:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:43,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:13:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:43,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:13:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:43,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:13:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:43,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:13:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:43,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:13:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:43,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:13:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:43,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 05:13:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:43,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-19 05:13:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:43,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-19 05:13:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:43,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-19 05:13:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:43,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-19 05:13:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:43,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-19 05:13:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:43,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-11-19 05:13:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:43,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1997 backedges. 470 proven. 275 refuted. 0 times theorem prover too weak. 1252 trivial. 0 not checked. [2021-11-19 05:13:43,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:13:44,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140067513] [2021-11-19 05:13:44,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140067513] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:13:44,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827341365] [2021-11-19 05:13:44,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 05:13:44,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:13:44,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:13:44,002 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:13:44,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d10ad6d-988b-45d4-a683-a61cfc6336f9/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-19 05:13:44,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-19 05:13:44,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:13:44,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-19 05:13:44,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:13:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1997 backedges. 1050 proven. 60 refuted. 0 times theorem prover too weak. 887 trivial. 0 not checked. [2021-11-19 05:13:44,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:13:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1997 backedges. 243 proven. 618 refuted. 0 times theorem prover too weak. 1136 trivial. 0 not checked. [2021-11-19 05:13:45,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827341365] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:13:45,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:13:45,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 19, 21] total 52 [2021-11-19 05:13:45,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586169230] [2021-11-19 05:13:45,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:13:45,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-19 05:13:45,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:13:45,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-19 05:13:45,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=2396, Unknown=0, NotChecked=0, Total=2652 [2021-11-19 05:13:45,719 INFO L87 Difference]: Start difference. First operand 64457 states and 101034 transitions. Second operand has 52 states, 52 states have (on average 2.2884615384615383) internal successors, (119), 36 states have internal predecessors, (119), 15 states have call successors, (21), 7 states have call predecessors, (21), 17 states have return successors, (30), 23 states have call predecessors, (30), 10 states have call successors, (30)