./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/Ackermann01-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-numeric/Ackermann01-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 380ed529f726f53285b49ce40e57404dbe066b029b8c3af7ce337366515780a5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 19:47:48,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:47:48,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:47:48,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:47:48,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:47:48,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:47:48,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:47:48,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:47:48,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:47:48,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:47:48,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:47:48,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:47:48,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:47:48,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:47:48,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:47:48,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:47:48,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:47:48,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:47:48,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:47:48,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:47:48,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:47:48,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:47:48,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:47:48,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:47:48,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:47:48,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:47:48,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:47:48,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:47:48,550 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:47:48,551 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:47:48,551 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:47:48,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:47:48,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:47:48,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:47:48,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:47:48,555 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:47:48,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:47:48,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:47:48,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:47:48,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:47:48,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:47:48,557 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-64bit-Automizer_Default.epf [2022-12-13 19:47:48,578 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:47:48,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:47:48,579 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:47:48,579 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:47:48,580 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:47:48,580 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:47:48,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:47:48,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:47:48,581 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:47:48,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:47:48,581 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 19:47:48,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:47:48,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:47:48,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 19:47:48,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:47:48,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 19:47:48,582 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 19:47:48,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 19:47:48,582 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:47:48,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 19:47:48,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:47:48,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:47:48,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:47:48,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:47:48,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:47:48,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:47:48,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 19:47:48,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:47:48,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:47:48,584 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:47:48,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 19:47:48,584 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:47:48,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:47:48,585 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:47:48,585 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 380ed529f726f53285b49ce40e57404dbe066b029b8c3af7ce337366515780a5 [2022-12-13 19:47:48,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:47:48,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:47:48,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:47:48,805 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:47:48,805 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:47:48,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/termination-numeric/Ackermann01-1.c [2022-12-13 19:47:51,349 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:47:51,489 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:47:51,489 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/sv-benchmarks/c/termination-numeric/Ackermann01-1.c [2022-12-13 19:47:51,493 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/data/1e4b73b71/29252d7750814f51bd190c923dd71894/FLAG36296df67 [2022-12-13 19:47:51,910 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/data/1e4b73b71/29252d7750814f51bd190c923dd71894 [2022-12-13 19:47:51,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:47:51,913 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:47:51,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:47:51,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:47:51,916 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:47:51,917 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:47:51" (1/1) ... [2022-12-13 19:47:51,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61b98f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:51, skipping insertion in model container [2022-12-13 19:47:51,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:47:51" (1/1) ... [2022-12-13 19:47:51,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:47:51,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:47:52,043 WARN L237 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_03a529b0-13fa-4505-9dc0-02d285e3a575/sv-benchmarks/c/termination-numeric/Ackermann01-1.c[944,957] [2022-12-13 19:47:52,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:47:52,052 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:47:52,064 WARN L237 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_03a529b0-13fa-4505-9dc0-02d285e3a575/sv-benchmarks/c/termination-numeric/Ackermann01-1.c[944,957] [2022-12-13 19:47:52,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:47:52,075 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:47:52,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:52 WrapperNode [2022-12-13 19:47:52,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:47:52,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:47:52,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:47:52,076 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:47:52,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:52" (1/1) ... [2022-12-13 19:47:52,086 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:52" (1/1) ... [2022-12-13 19:47:52,096 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2022-12-13 19:47:52,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:47:52,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:47:52,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:47:52,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:47:52,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:52" (1/1) ... [2022-12-13 19:47:52,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:52" (1/1) ... [2022-12-13 19:47:52,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:52" (1/1) ... [2022-12-13 19:47:52,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:52" (1/1) ... [2022-12-13 19:47:52,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:52" (1/1) ... [2022-12-13 19:47:52,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:52" (1/1) ... [2022-12-13 19:47:52,109 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:52" (1/1) ... [2022-12-13 19:47:52,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:52" (1/1) ... [2022-12-13 19:47:52,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:47:52,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:47:52,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:47:52,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:47:52,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:52" (1/1) ... [2022-12-13 19:47:52,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:47:52,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:47:52,135 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:47:52,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:47:52,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:47:52,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:47:52,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:47:52,164 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2022-12-13 19:47:52,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2022-12-13 19:47:52,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 19:47:52,217 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:47:52,219 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:47:52,322 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:47:52,334 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:47:52,335 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-13 19:47:52,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:47:52 BoogieIcfgContainer [2022-12-13 19:47:52,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:47:52,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:47:52,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:47:52,342 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:47:52,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:47:51" (1/3) ... [2022-12-13 19:47:52,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5eea59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:47:52, skipping insertion in model container [2022-12-13 19:47:52,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:47:52" (2/3) ... [2022-12-13 19:47:52,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5eea59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:47:52, skipping insertion in model container [2022-12-13 19:47:52,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:47:52" (3/3) ... [2022-12-13 19:47:52,344 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann01-1.c [2022-12-13 19:47:52,363 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:47:52,363 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-12-13 19:47:52,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:47:52,402 INFO L357 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=PETRI_NET, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@77c87c6f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:47:52,402 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-12-13 19:47:52,405 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) [2022-12-13 19:47:52,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 19:47:52,412 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:47:52,412 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:47:52,413 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:47:52,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:52,416 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2022-12-13 19:47:52,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:52,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113805911] [2022-12-13 19:47:52,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:52,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:52,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:52,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113805911] [2022-12-13 19:47:52,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113805911] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:47:52,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:47:52,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:47:52,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487756126] [2022-12-13 19:47:52,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:47:52,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:47:52,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:52,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:47:52,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:47:52,656 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, 4 states have (on average 1.75) 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) [2022-12-13 19:47:52,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:47:52,793 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2022-12-13 19:47:52,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:47:52,796 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) 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 [2022-12-13 19:47:52,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:47:52,805 INFO L225 Difference]: With dead ends: 73 [2022-12-13 19:47:52,805 INFO L226 Difference]: Without dead ends: 60 [2022-12-13 19:47:52,808 INFO L412 NwaCegarLoop]: 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 [2022-12-13 19:47:52,811 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 61 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:47:52,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 107 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:47:52,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-13 19:47:52,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2022-12-13 19:47:52,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 42 states have internal predecessors, (53), 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) [2022-12-13 19:47:52,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2022-12-13 19:47:52,853 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 8 [2022-12-13 19:47:52,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:47:52,854 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2022-12-13 19:47:52,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) 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) [2022-12-13 19:47:52,854 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2022-12-13 19:47:52,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 19:47:52,855 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:47:52,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:47:52,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 19:47:52,855 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:47:52,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:52,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2022-12-13 19:47:52,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:52,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635353414] [2022-12-13 19:47:52,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:52,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:52,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:52,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635353414] [2022-12-13 19:47:52,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635353414] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:47:52,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:47:52,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:47:52,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296781819] [2022-12-13 19:47:52,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:47:52,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:47:52,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:52,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:47:52,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:47:52,930 INFO L87 Difference]: Start difference. First operand 51 states and 66 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) [2022-12-13 19:47:53,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:47:53,013 INFO L93 Difference]: Finished difference Result 101 states and 139 transitions. [2022-12-13 19:47:53,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:47:53,014 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 [2022-12-13 19:47:53,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:47:53,016 INFO L225 Difference]: With dead ends: 101 [2022-12-13 19:47:53,016 INFO L226 Difference]: Without dead ends: 95 [2022-12-13 19:47:53,017 INFO L412 NwaCegarLoop]: 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 [2022-12-13 19:47:53,018 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:47:53,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 89 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:47:53,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-12-13 19:47:53,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2022-12-13 19:47:53,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.540983606557377) internal successors, (94), 70 states have internal predecessors, (94), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 19:47:53,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2022-12-13 19:47:53,039 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 9 [2022-12-13 19:47:53,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:47:53,039 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2022-12-13 19:47:53,040 INFO L496 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) [2022-12-13 19:47:53,040 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2022-12-13 19:47:53,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 19:47:53,040 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:47:53,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:47:53,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 19:47:53,040 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:47:53,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:53,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2022-12-13 19:47:53,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:53,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682160657] [2022-12-13 19:47:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:53,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:53,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:53,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:53,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682160657] [2022-12-13 19:47:53,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682160657] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:47:53,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:47:53,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:47:53,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220448517] [2022-12-13 19:47:53,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:47:53,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:47:53,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:53,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:47:53,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:47:53,112 INFO L87 Difference]: Start difference. First operand 85 states and 117 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) [2022-12-13 19:47:53,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:47:53,183 INFO L93 Difference]: Finished difference Result 114 states and 154 transitions. [2022-12-13 19:47:53,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:47:53,184 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 [2022-12-13 19:47:53,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:47:53,185 INFO L225 Difference]: With dead ends: 114 [2022-12-13 19:47:53,186 INFO L226 Difference]: Without dead ends: 110 [2022-12-13 19:47:53,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:47:53,187 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 49 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:47:53,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 93 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:47:53,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-12-13 19:47:53,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2022-12-13 19:47:53,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.472972972972973) internal successors, (109), 83 states have internal predecessors, (109), 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) [2022-12-13 19:47:53,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 138 transitions. [2022-12-13 19:47:53,202 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 138 transitions. Word has length 9 [2022-12-13 19:47:53,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:47:53,202 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 138 transitions. [2022-12-13 19:47:53,202 INFO L496 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) [2022-12-13 19:47:53,202 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 138 transitions. [2022-12-13 19:47:53,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 19:47:53,202 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:47:53,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:47:53,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 19:47:53,203 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:47:53,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:53,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2022-12-13 19:47:53,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:53,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253208607] [2022-12-13 19:47:53,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:53,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:53,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:53,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253208607] [2022-12-13 19:47:53,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253208607] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:47:53,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:47:53,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:47:53,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853871768] [2022-12-13 19:47:53,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:47:53,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:47:53,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:53,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:47:53,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:47:53,245 INFO L87 Difference]: Start difference. First operand 102 states and 138 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) [2022-12-13 19:47:53,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:47:53,284 INFO L93 Difference]: Finished difference Result 102 states and 138 transitions. [2022-12-13 19:47:53,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:47:53,284 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 [2022-12-13 19:47:53,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:47:53,285 INFO L225 Difference]: With dead ends: 102 [2022-12-13 19:47:53,285 INFO L226 Difference]: Without dead ends: 100 [2022-12-13 19:47:53,286 INFO L412 NwaCegarLoop]: 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 [2022-12-13 19:47:53,287 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:47:53,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 45 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:47:53,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-12-13 19:47:53,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-12-13 19:47:53,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.337837837837838) internal successors, (99), 81 states have internal predecessors, (99), 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) [2022-12-13 19:47:53,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2022-12-13 19:47:53,300 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 10 [2022-12-13 19:47:53,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:47:53,300 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2022-12-13 19:47:53,301 INFO L496 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) [2022-12-13 19:47:53,301 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2022-12-13 19:47:53,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 19:47:53,301 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:47:53,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:47:53,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 19:47:53,301 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:47:53,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:53,302 INFO L85 PathProgramCache]: Analyzing trace with hash -796703108, now seen corresponding path program 1 times [2022-12-13 19:47:53,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:53,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305527851] [2022-12-13 19:47:53,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:53,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:53,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:53,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305527851] [2022-12-13 19:47:53,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305527851] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:47:53,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:47:53,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:47:53,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954422512] [2022-12-13 19:47:53,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:47:53,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:47:53,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:53,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:47:53,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:47:53,355 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-12-13 19:47:53,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:47:53,412 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2022-12-13 19:47:53,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:47:53,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 11 [2022-12-13 19:47:53,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:47:53,414 INFO L225 Difference]: With dead ends: 109 [2022-12-13 19:47:53,414 INFO L226 Difference]: Without dead ends: 108 [2022-12-13 19:47:53,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:47:53,415 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:47:53,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 92 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:47:53,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-12-13 19:47:53,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-12-13 19:47:53,429 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) [2022-12-13 19:47:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2022-12-13 19:47:53,430 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 11 [2022-12-13 19:47:53,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:47:53,431 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2022-12-13 19:47:53,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-12-13 19:47:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2022-12-13 19:47:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 19:47:53,431 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:47:53,431 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:47:53,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 19:47:53,432 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:47:53,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:53,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645175, now seen corresponding path program 1 times [2022-12-13 19:47:53,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:53,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033557144] [2022-12-13 19:47:53,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:53,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:53,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:53,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033557144] [2022-12-13 19:47:53,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033557144] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:47:53,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:47:53,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:47:53,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693420953] [2022-12-13 19:47:53,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:47:53,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:47:53,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:53,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:47:53,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:47:53,469 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-12-13 19:47:53,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:47:53,509 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2022-12-13 19:47:53,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:47:53,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 15 [2022-12-13 19:47:53,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:47:53,511 INFO L225 Difference]: With dead ends: 168 [2022-12-13 19:47:53,511 INFO L226 Difference]: Without dead ends: 97 [2022-12-13 19:47:53,512 INFO L412 NwaCegarLoop]: 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 [2022-12-13 19:47:53,513 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:47:53,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 88 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:47:53,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-12-13 19:47:53,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-12-13 19:47:53,524 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) [2022-12-13 19:47:53,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2022-12-13 19:47:53,526 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 15 [2022-12-13 19:47:53,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:47:53,526 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2022-12-13 19:47:53,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-12-13 19:47:53,527 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2022-12-13 19:47:53,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 19:47:53,527 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:47:53,527 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:47:53,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 19:47:53,528 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:47:53,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:53,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645399, now seen corresponding path program 1 times [2022-12-13 19:47:53,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:53,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014992757] [2022-12-13 19:47:53,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:53,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:53,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:53,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014992757] [2022-12-13 19:47:53,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014992757] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:47:53,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024768411] [2022-12-13 19:47:53,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:53,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:53,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:47:53,588 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:47:53,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 19:47:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:53,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 19:47:53,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:47:53,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:53,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:47:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:53,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024768411] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:47:53,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:47:53,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-12-13 19:47:53,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435305214] [2022-12-13 19:47:53,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:47:53,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:47:53,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:53,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:47:53,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:47:53,738 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 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) [2022-12-13 19:47:53,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:47:53,961 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2022-12-13 19:47:53,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 19:47:53,962 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 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 15 [2022-12-13 19:47:53,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:47:53,964 INFO L225 Difference]: With dead ends: 274 [2022-12-13 19:47:53,964 INFO L226 Difference]: Without dead ends: 272 [2022-12-13 19:47:53,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-12-13 19:47:53,966 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 249 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:47:53,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 163 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:47:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-12-13 19:47:53,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2022-12-13 19:47:53,992 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) [2022-12-13 19:47:53,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2022-12-13 19:47:53,995 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 15 [2022-12-13 19:47:53,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:47:53,995 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2022-12-13 19:47:53,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 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) [2022-12-13 19:47:53,995 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2022-12-13 19:47:53,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 19:47:53,996 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:47:53,996 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:47:54,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 19:47:54,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 19:47:54,198 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:47:54,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:54,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1422985811, now seen corresponding path program 1 times [2022-12-13 19:47:54,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:54,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319633330] [2022-12-13 19:47:54,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:54,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:54,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:54,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319633330] [2022-12-13 19:47:54,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319633330] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:47:54,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842763133] [2022-12-13 19:47:54,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:54,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:54,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:47:54,364 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:47:54,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 19:47:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:54,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 19:47:54,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:47:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:54,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:47:54,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842763133] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:47:54,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:47:54,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-12-13 19:47:54,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117893237] [2022-12-13 19:47:54,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:47:54,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:47:54,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:54,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:47:54,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:47:54,432 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-12-13 19:47:54,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:47:54,500 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2022-12-13 19:47:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:47:54,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 16 [2022-12-13 19:47:54,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:47:54,502 INFO L225 Difference]: With dead ends: 328 [2022-12-13 19:47:54,502 INFO L226 Difference]: Without dead ends: 327 [2022-12-13 19:47:54,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:47:54,503 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 41 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:47:54,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 96 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:47:54,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-12-13 19:47:54,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2022-12-13 19:47:54,521 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) [2022-12-13 19:47:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2022-12-13 19:47:54,522 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 16 [2022-12-13 19:47:54,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:47:54,523 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2022-12-13 19:47:54,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-12-13 19:47:54,523 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2022-12-13 19:47:54,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 19:47:54,523 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:47:54,523 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:47:54,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 19:47:54,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:54,724 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:47:54,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:54,724 INFO L85 PathProgramCache]: Analyzing trace with hash 848163410, now seen corresponding path program 1 times [2022-12-13 19:47:54,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:54,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160797224] [2022-12-13 19:47:54,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:54,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:54,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:54,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160797224] [2022-12-13 19:47:54,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160797224] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:47:54,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865934855] [2022-12-13 19:47:54,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:54,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:54,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:47:54,773 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:47:54,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 19:47:54,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:54,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 19:47:54,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:47:54,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:54,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:47:54,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:54,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865934855] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:47:54,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:47:54,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-12-13 19:47:54,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986800002] [2022-12-13 19:47:54,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:47:54,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:47:54,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:54,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:47:54,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:47:54,885 INFO L87 Difference]: Start difference. First operand 293 states and 373 transitions. Second operand has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 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) [2022-12-13 19:47:55,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:47:55,089 INFO L93 Difference]: Finished difference Result 591 states and 792 transitions. [2022-12-13 19:47:55,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 19:47:55,089 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 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 19 [2022-12-13 19:47:55,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:47:55,092 INFO L225 Difference]: With dead ends: 591 [2022-12-13 19:47:55,092 INFO L226 Difference]: Without dead ends: 590 [2022-12-13 19:47:55,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-12-13 19:47:55,093 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 156 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:47:55,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 203 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:47:55,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-12-13 19:47:55,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 521. [2022-12-13 19:47:55,131 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) [2022-12-13 19:47:55,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2022-12-13 19:47:55,133 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 19 [2022-12-13 19:47:55,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:47:55,134 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2022-12-13 19:47:55,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 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) [2022-12-13 19:47:55,134 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2022-12-13 19:47:55,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 19:47:55,135 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:47:55,135 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:47:55,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 19:47:55,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:55,336 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:47:55,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:55,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2022-12-13 19:47:55,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:55,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704975289] [2022-12-13 19:47:55,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:55,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:55,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:47:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:47:55,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:55,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704975289] [2022-12-13 19:47:55,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704975289] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:47:55,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784606294] [2022-12-13 19:47:55,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:55,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:55,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:47:55,409 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:47:55,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 19:47:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:55,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 19:47:55,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:47:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:47:55,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:47:55,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784606294] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:47:55,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:47:55,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2022-12-13 19:47:55,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80762084] [2022-12-13 19:47:55,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:47:55,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:47:55,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:55,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:47:55,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-12-13 19:47:55,474 INFO L87 Difference]: Start difference. First operand 521 states and 649 transitions. Second operand has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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) [2022-12-13 19:47:55,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:47:55,555 INFO L93 Difference]: Finished difference Result 562 states and 696 transitions. [2022-12-13 19:47:55,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 19:47:55,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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 24 [2022-12-13 19:47:55,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:47:55,557 INFO L225 Difference]: With dead ends: 562 [2022-12-13 19:47:55,557 INFO L226 Difference]: Without dead ends: 561 [2022-12-13 19:47:55,557 INFO L412 NwaCegarLoop]: 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 [2022-12-13 19:47:55,558 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 43 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:47:55,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 98 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:47:55,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-12-13 19:47:55,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 520. [2022-12-13 19:47:55,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 407 states have (on average 1.194103194103194) internal successors, (486), 413 states have internal predecessors, (486), 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) [2022-12-13 19:47:55,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 645 transitions. [2022-12-13 19:47:55,586 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 645 transitions. Word has length 24 [2022-12-13 19:47:55,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:47:55,586 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 645 transitions. [2022-12-13 19:47:55,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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) [2022-12-13 19:47:55,586 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 645 transitions. [2022-12-13 19:47:55,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 19:47:55,587 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:47:55,587 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:47:55,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 19:47:55,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 19:47:55,788 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:47:55,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:55,789 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2022-12-13 19:47:55,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:55,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786264259] [2022-12-13 19:47:55,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:55,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:55,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:47:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:47:55,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:55,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786264259] [2022-12-13 19:47:55,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786264259] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:47:55,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765026715] [2022-12-13 19:47:55,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:55,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:55,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:47:55,971 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:47:55,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 19:47:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:56,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:47:56,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:47:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:47:56,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:47:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:47:56,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765026715] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:47:56,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:47:56,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-12-13 19:47:56,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932839106] [2022-12-13 19:47:56,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:47:56,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 19:47:56,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:56,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 19:47:56,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-12-13 19:47:56,164 INFO L87 Difference]: Start difference. First operand 520 states and 645 transitions. Second operand has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 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) [2022-12-13 19:47:56,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:47:56,446 INFO L93 Difference]: Finished difference Result 869 states and 1249 transitions. [2022-12-13 19:47:56,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 19:47:56,447 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 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 25 [2022-12-13 19:47:56,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:47:56,451 INFO L225 Difference]: With dead ends: 869 [2022-12-13 19:47:56,451 INFO L226 Difference]: Without dead ends: 867 [2022-12-13 19:47:56,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2022-12-13 19:47:56,453 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 172 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:47:56,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 134 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:47:56,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-12-13 19:47:56,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 727. [2022-12-13 19:47:56,492 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) [2022-12-13 19:47:56,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 981 transitions. [2022-12-13 19:47:56,501 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 981 transitions. Word has length 25 [2022-12-13 19:47:56,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:47:56,501 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 981 transitions. [2022-12-13 19:47:56,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 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) [2022-12-13 19:47:56,501 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 981 transitions. [2022-12-13 19:47:56,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 19:47:56,502 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:47:56,503 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:47:56,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 19:47:56,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:56,703 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:47:56,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:56,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1298021223, now seen corresponding path program 1 times [2022-12-13 19:47:56,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:56,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442835708] [2022-12-13 19:47:56,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:56,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:56,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:47:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:56,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:47:56,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:56,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442835708] [2022-12-13 19:47:56,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442835708] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:47:56,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502657324] [2022-12-13 19:47:56,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:56,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:56,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:47:56,782 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:47:56,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 19:47:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:56,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 19:47:56,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:47:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:47:56,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:47:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:47:56,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502657324] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:47:56,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:47:56,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2022-12-13 19:47:56,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470052092] [2022-12-13 19:47:56,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:47:56,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:47:56,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:56,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:47:56,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-12-13 19:47:56,952 INFO L87 Difference]: Start difference. First operand 727 states and 981 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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) [2022-12-13 19:47:57,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:47:57,126 INFO L93 Difference]: Finished difference Result 886 states and 1251 transitions. [2022-12-13 19:47:57,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 19:47:57,126 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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 27 [2022-12-13 19:47:57,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:47:57,129 INFO L225 Difference]: With dead ends: 886 [2022-12-13 19:47:57,130 INFO L226 Difference]: Without dead ends: 885 [2022-12-13 19:47:57,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-12-13 19:47:57,131 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 51 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:47:57,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 109 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:47:57,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-12-13 19:47:57,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 812. [2022-12-13 19:47:57,189 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) [2022-12-13 19:47:57,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1076 transitions. [2022-12-13 19:47:57,195 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1076 transitions. Word has length 27 [2022-12-13 19:47:57,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:47:57,195 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1076 transitions. [2022-12-13 19:47:57,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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) [2022-12-13 19:47:57,196 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1076 transitions. [2022-12-13 19:47:57,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-13 19:47:57,197 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:47:57,197 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:47:57,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 19:47:57,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 19:47:57,398 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:47:57,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:57,399 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2022-12-13 19:47:57,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:57,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450241505] [2022-12-13 19:47:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:57,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:57,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:47:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:57,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:47:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 19:47:57,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:57,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450241505] [2022-12-13 19:47:57,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450241505] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:47:57,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156689707] [2022-12-13 19:47:57,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:57,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:57,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:47:57,530 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:47:57,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 19:47:57,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:57,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:47:57,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:47:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 19:47:57,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:47:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 19:47:57,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156689707] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:47:57,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:47:57,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-12-13 19:47:57,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99324469] [2022-12-13 19:47:57,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:47:57,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 19:47:57,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:57,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 19:47:57,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:47:57,755 INFO L87 Difference]: Start difference. First operand 812 states and 1076 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 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) [2022-12-13 19:47:58,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:47:58,200 INFO L93 Difference]: Finished difference Result 1503 states and 2506 transitions. [2022-12-13 19:47:58,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 19:47:58,200 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 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 34 [2022-12-13 19:47:58,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:47:58,209 INFO L225 Difference]: With dead ends: 1503 [2022-12-13 19:47:58,209 INFO L226 Difference]: Without dead ends: 1501 [2022-12-13 19:47:58,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2022-12-13 19:47:58,211 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 149 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:47:58,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 158 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 19:47:58,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-12-13 19:47:58,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1258. [2022-12-13 19:47:58,289 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) [2022-12-13 19:47:58,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1844 transitions. [2022-12-13 19:47:58,295 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1844 transitions. Word has length 34 [2022-12-13 19:47:58,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:47:58,295 INFO L495 AbstractCegarLoop]: Abstraction has 1258 states and 1844 transitions. [2022-12-13 19:47:58,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 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) [2022-12-13 19:47:58,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1844 transitions. [2022-12-13 19:47:58,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 19:47:58,296 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:47:58,296 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:47:58,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 19:47:58,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 19:47:58,497 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:47:58,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:58,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1979265987, now seen corresponding path program 2 times [2022-12-13 19:47:58,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:58,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411273570] [2022-12-13 19:47:58,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:58,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:58,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:47:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 19:47:58,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:58,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411273570] [2022-12-13 19:47:58,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411273570] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:47:58,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894569351] [2022-12-13 19:47:58,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:47:58,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:58,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:47:58,587 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:47:58,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 19:47:58,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:47:58,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:47:58,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 19:47:58,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:47:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 19:47:58,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:47:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 19:47:58,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894569351] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:47:58,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:47:58,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-13 19:47:58,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127739176] [2022-12-13 19:47:58,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:47:58,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 19:47:58,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:58,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 19:47:58,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-12-13 19:47:58,788 INFO L87 Difference]: Start difference. First operand 1258 states and 1844 transitions. Second operand has 19 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 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) [2022-12-13 19:47:59,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:47:59,320 INFO L93 Difference]: Finished difference Result 2350 states and 3816 transitions. [2022-12-13 19:47:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 19:47:59,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 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 35 [2022-12-13 19:47:59,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:47:59,331 INFO L225 Difference]: With dead ends: 2350 [2022-12-13 19:47:59,331 INFO L226 Difference]: Without dead ends: 2333 [2022-12-13 19:47:59,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=323, Invalid=1009, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 19:47:59,332 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 314 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:47:59,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 165 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 19:47:59,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2022-12-13 19:47:59,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1748. [2022-12-13 19:47:59,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1275 states have (on average 1.1654901960784314) internal successors, (1486), 1333 states have internal predecessors, (1486), 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) [2022-12-13 19:47:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 2623 transitions. [2022-12-13 19:47:59,451 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 2623 transitions. Word has length 35 [2022-12-13 19:47:59,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:47:59,451 INFO L495 AbstractCegarLoop]: Abstraction has 1748 states and 2623 transitions. [2022-12-13 19:47:59,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 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) [2022-12-13 19:47:59,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 2623 transitions. [2022-12-13 19:47:59,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 19:47:59,452 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:47:59,452 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:47:59,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 19:47:59,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 19:47:59,653 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:47:59,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:59,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1607744024, now seen corresponding path program 1 times [2022-12-13 19:47:59,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:59,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185258038] [2022-12-13 19:47:59,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:59,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:59,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:47:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:59,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:47:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 19:47:59,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:59,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185258038] [2022-12-13 19:47:59,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185258038] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:47:59,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842434589] [2022-12-13 19:47:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:59,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:59,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:47:59,749 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:47:59,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 19:47:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:59,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:47:59,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:47:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 19:47:59,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:47:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 19:47:59,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842434589] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:47:59,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:47:59,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2022-12-13 19:47:59,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903798859] [2022-12-13 19:47:59,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:47:59,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 19:47:59,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:59,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 19:47:59,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:47:59,975 INFO L87 Difference]: Start difference. First operand 1748 states and 2623 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 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) [2022-12-13 19:48:00,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:48:00,197 INFO L93 Difference]: Finished difference Result 1905 states and 3109 transitions. [2022-12-13 19:48:00,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 19:48:00,198 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 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 36 [2022-12-13 19:48:00,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:48:00,208 INFO L225 Difference]: With dead ends: 1905 [2022-12-13 19:48:00,209 INFO L226 Difference]: Without dead ends: 1904 [2022-12-13 19:48:00,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-12-13 19:48:00,211 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 47 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:48:00,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 149 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:48:00,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2022-12-13 19:48:00,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1729. [2022-12-13 19:48:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1266 states have (on average 1.1642969984202212) internal successors, (1474), 1324 states have internal predecessors, (1474), 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) [2022-12-13 19:48:00,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2475 transitions. [2022-12-13 19:48:00,324 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2475 transitions. Word has length 36 [2022-12-13 19:48:00,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:48:00,324 INFO L495 AbstractCegarLoop]: Abstraction has 1729 states and 2475 transitions. [2022-12-13 19:48:00,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 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) [2022-12-13 19:48:00,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2475 transitions. [2022-12-13 19:48:00,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 19:48:00,325 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:48:00,325 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 19:48:00,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 19:48:00,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 19:48:00,526 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:48:00,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:48:00,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1390366252, now seen corresponding path program 2 times [2022-12-13 19:48:00,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:48:00,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307388118] [2022-12-13 19:48:00,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:00,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:48:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:48:00,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:48:00,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307388118] [2022-12-13 19:48:00,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307388118] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:48:00,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595872235] [2022-12-13 19:48:00,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:48:00,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:00,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:48:00,619 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:48:00,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 19:48:00,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:48:00,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:48:00,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 19:48:00,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:48:00,702 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:48:00,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:48:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:48:00,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595872235] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:48:00,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:48:00,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-12-13 19:48:00,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863023116] [2022-12-13 19:48:00,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:48:00,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 19:48:00,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:48:00,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 19:48:00,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-12-13 19:48:00,822 INFO L87 Difference]: Start difference. First operand 1729 states and 2475 transitions. Second operand has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 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) [2022-12-13 19:48:01,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:48:01,376 INFO L93 Difference]: Finished difference Result 2553 states and 3969 transitions. [2022-12-13 19:48:01,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 19:48:01,376 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 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 43 [2022-12-13 19:48:01,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:48:01,385 INFO L225 Difference]: With dead ends: 2553 [2022-12-13 19:48:01,385 INFO L226 Difference]: Without dead ends: 2552 [2022-12-13 19:48:01,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 19:48:01,387 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 512 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 19:48:01,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 472 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 19:48:01,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2022-12-13 19:48:01,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2411. [2022-12-13 19:48:01,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 1751 states have (on average 1.1462021701884637) internal successors, (2007), 1838 states have internal predecessors, (2007), 425 states have call successors, (425), 106 states have call predecessors, (425), 230 states have return successors, (994), 466 states have call predecessors, (994), 417 states have call successors, (994) [2022-12-13 19:48:01,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 3426 transitions. [2022-12-13 19:48:01,531 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 3426 transitions. Word has length 43 [2022-12-13 19:48:01,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:48:01,532 INFO L495 AbstractCegarLoop]: Abstraction has 2411 states and 3426 transitions. [2022-12-13 19:48:01,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 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) [2022-12-13 19:48:01,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 3426 transitions. [2022-12-13 19:48:01,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 19:48:01,533 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:48:01,533 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:48:01,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 19:48:01,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 19:48:01,734 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:48:01,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:48:01,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1058043410, now seen corresponding path program 2 times [2022-12-13 19:48:01,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:48:01,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595204667] [2022-12-13 19:48:01,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:01,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:48:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:01,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:48:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:01,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:48:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 19:48:01,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:48:01,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595204667] [2022-12-13 19:48:01,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595204667] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:48:01,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571812940] [2022-12-13 19:48:01,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:48:01,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:01,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:48:01,831 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:48:01,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 19:48:01,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:48:01,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:48:01,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 19:48:01,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:48:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 19:48:01,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:48:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 19:48:02,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571812940] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:48:02,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:48:02,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-12-13 19:48:02,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69315493] [2022-12-13 19:48:02,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:48:02,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 19:48:02,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:48:02,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 19:48:02,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-12-13 19:48:02,096 INFO L87 Difference]: Start difference. First operand 2411 states and 3426 transitions. Second operand has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 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) [2022-12-13 19:48:03,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:48:03,338 INFO L93 Difference]: Finished difference Result 5115 states and 8898 transitions. [2022-12-13 19:48:03,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 19:48:03,339 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 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 44 [2022-12-13 19:48:03,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:48:03,360 INFO L225 Difference]: With dead ends: 5115 [2022-12-13 19:48:03,360 INFO L226 Difference]: Without dead ends: 3631 [2022-12-13 19:48:03,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2022-12-13 19:48:03,376 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 278 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 19:48:03,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 304 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 19:48:03,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2022-12-13 19:48:03,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 2793. [2022-12-13 19:48:03,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2793 states, 2029 states have (on average 1.141941843272548) internal successors, (2317), 2127 states have internal predecessors, (2317), 496 states have call successors, (496), 126 states have call predecessors, (496), 263 states have return successors, (1090), 539 states have call predecessors, (1090), 488 states have call successors, (1090) [2022-12-13 19:48:03,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 3903 transitions. [2022-12-13 19:48:03,606 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 3903 transitions. Word has length 44 [2022-12-13 19:48:03,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:48:03,606 INFO L495 AbstractCegarLoop]: Abstraction has 2793 states and 3903 transitions. [2022-12-13 19:48:03,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 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) [2022-12-13 19:48:03,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 3903 transitions. [2022-12-13 19:48:03,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 19:48:03,608 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:48:03,608 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:48:03,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 19:48:03,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 19:48:03,809 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:48:03,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:48:03,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1051982124, now seen corresponding path program 1 times [2022-12-13 19:48:03,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:48:03,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65989459] [2022-12-13 19:48:03,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:03,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:48:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:03,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:48:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:03,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:48:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:03,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-12-13 19:48:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 19:48:03,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:48:03,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65989459] [2022-12-13 19:48:03,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65989459] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:48:03,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888596484] [2022-12-13 19:48:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:03,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:03,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:48:03,869 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:48:03,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 19:48:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:03,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 19:48:03,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:48:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 19:48:03,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:48:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 19:48:04,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888596484] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:48:04,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:48:04,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2022-12-13 19:48:04,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249034066] [2022-12-13 19:48:04,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:48:04,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:48:04,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:48:04,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:48:04,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:48:04,032 INFO L87 Difference]: Start difference. First operand 2793 states and 3903 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 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) [2022-12-13 19:48:04,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:48:04,220 INFO L93 Difference]: Finished difference Result 4152 states and 6111 transitions. [2022-12-13 19:48:04,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:48:04,221 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 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 44 [2022-12-13 19:48:04,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:48:04,228 INFO L225 Difference]: With dead ends: 4152 [2022-12-13 19:48:04,229 INFO L226 Difference]: Without dead ends: 1643 [2022-12-13 19:48:04,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-12-13 19:48:04,243 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 71 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:48:04,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 106 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:48:04,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2022-12-13 19:48:04,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1622. [2022-12-13 19:48:04,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1209 states have (on average 1.1017369727047146) internal successors, (1332), 1241 states have internal predecessors, (1332), 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) [2022-12-13 19:48:04,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2085 transitions. [2022-12-13 19:48:04,378 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2085 transitions. Word has length 44 [2022-12-13 19:48:04,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:48:04,378 INFO L495 AbstractCegarLoop]: Abstraction has 1622 states and 2085 transitions. [2022-12-13 19:48:04,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 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) [2022-12-13 19:48:04,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2085 transitions. [2022-12-13 19:48:04,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-13 19:48:04,380 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:48:04,380 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:48:04,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 19:48:04,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 19:48:04,580 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:48:04,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:48:04,581 INFO L85 PathProgramCache]: Analyzing trace with hash 843839239, now seen corresponding path program 1 times [2022-12-13 19:48:04,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:48:04,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363217263] [2022-12-13 19:48:04,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:04,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:48:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:04,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:48:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:04,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:48:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:04,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:48:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:04,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 19:48:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 19:48:04,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:48:04,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363217263] [2022-12-13 19:48:04,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363217263] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:48:04,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539886304] [2022-12-13 19:48:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:04,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:04,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:48:04,754 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:48:04,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 19:48:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:04,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 19:48:04,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:48:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-13 19:48:04,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:48:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 19:48:05,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539886304] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:48:05,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:48:05,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-12-13 19:48:05,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871870198] [2022-12-13 19:48:05,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:48:05,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 19:48:05,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:48:05,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 19:48:05,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-12-13 19:48:05,182 INFO L87 Difference]: Start difference. First operand 1622 states and 2085 transitions. Second operand has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 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) [2022-12-13 19:48:06,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:48:06,366 INFO L93 Difference]: Finished difference Result 4071 states and 7472 transitions. [2022-12-13 19:48:06,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-13 19:48:06,367 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 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 53 [2022-12-13 19:48:06,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:48:06,387 INFO L225 Difference]: With dead ends: 4071 [2022-12-13 19:48:06,387 INFO L226 Difference]: Without dead ends: 4065 [2022-12-13 19:48:06,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1682 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2022-12-13 19:48:06,391 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 236 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 19:48:06,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 258 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 19:48:06,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4065 states. [2022-12-13 19:48:06,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4065 to 2921. [2022-12-13 19:48:06,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2921 states, 2020 states have (on average 1.0787128712871288) internal successors, (2179), 2052 states have internal predecessors, (2179), 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) [2022-12-13 19:48:06,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2921 states to 2921 states and 5954 transitions. [2022-12-13 19:48:06,700 INFO L78 Accepts]: Start accepts. Automaton has 2921 states and 5954 transitions. Word has length 53 [2022-12-13 19:48:06,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:48:06,700 INFO L495 AbstractCegarLoop]: Abstraction has 2921 states and 5954 transitions. [2022-12-13 19:48:06,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 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) [2022-12-13 19:48:06,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2921 states and 5954 transitions. [2022-12-13 19:48:06,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 19:48:06,702 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:48:06,702 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-13 19:48:06,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 19:48:06,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:06,903 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:48:06,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:48:06,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2013961680, now seen corresponding path program 1 times [2022-12-13 19:48:06,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:48:06,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904865564] [2022-12-13 19:48:06,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:06,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:48:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 19:48:07,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:48:07,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904865564] [2022-12-13 19:48:07,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904865564] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:48:07,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214686956] [2022-12-13 19:48:07,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:07,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:07,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:48:07,126 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:48:07,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 19:48:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:07,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 19:48:07,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:48:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 19:48:07,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:48:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 19:48:07,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214686956] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:48:07,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:48:07,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-12-13 19:48:07,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663579583] [2022-12-13 19:48:07,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:48:07,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 19:48:07,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:48:07,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 19:48:07,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-12-13 19:48:07,384 INFO L87 Difference]: Start difference. First operand 2921 states and 5954 transitions. Second operand has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 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) [2022-12-13 19:48:08,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:48:08,327 INFO L93 Difference]: Finished difference Result 7980 states and 16569 transitions. [2022-12-13 19:48:08,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 19:48:08,328 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 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 57 [2022-12-13 19:48:08,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:48:08,363 INFO L225 Difference]: With dead ends: 7980 [2022-12-13 19:48:08,363 INFO L226 Difference]: Without dead ends: 7979 [2022-12-13 19:48:08,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 19:48:08,366 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 868 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:48:08,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 299 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 19:48:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7979 states. [2022-12-13 19:48:08,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7979 to 7895. [2022-12-13 19:48:08,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7895 states, 5500 states have (on average 1.0812727272727272) internal successors, (5947), 5604 states have internal predecessors, (5947), 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) [2022-12-13 19:48:08,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7895 states to 7895 states and 16130 transitions. [2022-12-13 19:48:08,977 INFO L78 Accepts]: Start accepts. Automaton has 7895 states and 16130 transitions. Word has length 57 [2022-12-13 19:48:08,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:48:08,977 INFO L495 AbstractCegarLoop]: Abstraction has 7895 states and 16130 transitions. [2022-12-13 19:48:08,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 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) [2022-12-13 19:48:08,978 INFO L276 IsEmpty]: Start isEmpty. Operand 7895 states and 16130 transitions. [2022-12-13 19:48:08,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 19:48:08,979 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:48:08,979 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:48:08,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 19:48:09,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:09,180 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:48:09,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:48:09,181 INFO L85 PathProgramCache]: Analyzing trace with hash -814290418, now seen corresponding path program 1 times [2022-12-13 19:48:09,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:48:09,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337945026] [2022-12-13 19:48:09,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:09,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:48:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:09,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:48:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:09,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:48:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:09,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:48:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:09,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 19:48:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 19:48:09,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:48:09,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337945026] [2022-12-13 19:48:09,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337945026] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:48:09,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016726707] [2022-12-13 19:48:09,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:09,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:09,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:48:09,391 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:48:09,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 19:48:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:09,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 19:48:09,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:48:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-13 19:48:09,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:48:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 19:48:09,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016726707] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:48:09,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:48:09,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-12-13 19:48:09,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617356203] [2022-12-13 19:48:09,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:48:09,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 19:48:09,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:48:09,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 19:48:09,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-12-13 19:48:09,868 INFO L87 Difference]: Start difference. First operand 7895 states and 16130 transitions. Second operand has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 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) [2022-12-13 19:48:12,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:48:12,083 INFO L93 Difference]: Finished difference Result 27455 states and 98845 transitions. [2022-12-13 19:48:12,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-13 19:48:12,084 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 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 55 [2022-12-13 19:48:12,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:48:12,234 INFO L225 Difference]: With dead ends: 27455 [2022-12-13 19:48:12,234 INFO L226 Difference]: Without dead ends: 20915 [2022-12-13 19:48:12,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=905, Invalid=3517, Unknown=0, NotChecked=0, Total=4422 [2022-12-13 19:48:12,349 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 124 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 19:48:12,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 320 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 19:48:12,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20915 states. [2022-12-13 19:48:14,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20915 to 16588. [2022-12-13 19:48:14,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16588 states, 10884 states have (on average 1.0526460859977949) internal successors, (11457), 10949 states have internal predecessors, (11457), 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) [2022-12-13 19:48:14,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16588 states to 16588 states and 59914 transitions. [2022-12-13 19:48:14,400 INFO L78 Accepts]: Start accepts. Automaton has 16588 states and 59914 transitions. Word has length 55 [2022-12-13 19:48:14,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:48:14,400 INFO L495 AbstractCegarLoop]: Abstraction has 16588 states and 59914 transitions. [2022-12-13 19:48:14,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 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) [2022-12-13 19:48:14,401 INFO L276 IsEmpty]: Start isEmpty. Operand 16588 states and 59914 transitions. [2022-12-13 19:48:14,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-13 19:48:14,402 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:48:14,402 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:48:14,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-13 19:48:14,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:14,603 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:48:14,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:48:14,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1727955375, now seen corresponding path program 2 times [2022-12-13 19:48:14,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:48:14,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240470328] [2022-12-13 19:48:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:14,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:48:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:14,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-12-13 19:48:14,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:14,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:48:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:14,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:48:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:14,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:48:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:14,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 19:48:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:14,942 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 86 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-13 19:48:14,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:48:14,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240470328] [2022-12-13 19:48:14,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240470328] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:48:14,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19242246] [2022-12-13 19:48:14,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:48:14,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:14,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:48:14,944 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:48:14,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 19:48:14,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:48:14,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:48:14,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 19:48:14,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:48:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-13 19:48:15,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:48:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 94 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-13 19:48:15,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19242246] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:48:15,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:48:15,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2022-12-13 19:48:15,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632508819] [2022-12-13 19:48:15,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:48:15,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 19:48:15,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:48:15,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 19:48:15,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 19:48:15,716 INFO L87 Difference]: Start difference. First operand 16588 states and 59914 transitions. Second operand has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 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) [2022-12-13 19:48:17,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:48:17,501 INFO L93 Difference]: Finished difference Result 25421 states and 94291 transitions. [2022-12-13 19:48:17,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 19:48:17,501 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 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 80 [2022-12-13 19:48:17,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:48:17,581 INFO L225 Difference]: With dead ends: 25421 [2022-12-13 19:48:17,581 INFO L226 Difference]: Without dead ends: 10188 [2022-12-13 19:48:17,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=667, Invalid=2639, Unknown=0, NotChecked=0, Total=3306 [2022-12-13 19:48:17,708 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 128 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 19:48:17,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 453 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 19:48:17,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10188 states. [2022-12-13 19:48:18,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10188 to 9700. [2022-12-13 19:48:18,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9700 states, 6737 states have (on average 1.078076295086834) internal successors, (7263), 6944 states have internal predecessors, (7263), 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) [2022-12-13 19:48:18,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9700 states to 9700 states and 15624 transitions. [2022-12-13 19:48:18,432 INFO L78 Accepts]: Start accepts. Automaton has 9700 states and 15624 transitions. Word has length 80 [2022-12-13 19:48:18,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:48:18,432 INFO L495 AbstractCegarLoop]: Abstraction has 9700 states and 15624 transitions. [2022-12-13 19:48:18,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 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) [2022-12-13 19:48:18,432 INFO L276 IsEmpty]: Start isEmpty. Operand 9700 states and 15624 transitions. [2022-12-13 19:48:18,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-13 19:48:18,434 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:48:18,434 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:48:18,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 19:48:18,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 19:48:18,635 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:48:18,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:48:18,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1935422832, now seen corresponding path program 3 times [2022-12-13 19:48:18,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:48:18,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826365466] [2022-12-13 19:48:18,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:18,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:48:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:18,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:48:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:18,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:48:18,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 62 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 19:48:18,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:48:18,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826365466] [2022-12-13 19:48:18,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826365466] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:48:18,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018064860] [2022-12-13 19:48:18,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:48:18,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:18,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:48:18,837 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:48:18,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 19:48:18,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-13 19:48:18,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:48:18,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 19:48:18,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:48:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 60 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 19:48:18,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:48:19,250 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 64 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 19:48:19,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018064860] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:48:19,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:48:19,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-12-13 19:48:19,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515521563] [2022-12-13 19:48:19,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:48:19,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 19:48:19,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:48:19,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 19:48:19,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 19:48:19,253 INFO L87 Difference]: Start difference. First operand 9700 states and 15624 transitions. Second operand has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 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) [2022-12-13 19:48:20,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:48:20,675 INFO L93 Difference]: Finished difference Result 10351 states and 16622 transitions. [2022-12-13 19:48:20,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 19:48:20,676 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 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 68 [2022-12-13 19:48:20,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:48:20,712 INFO L225 Difference]: With dead ends: 10351 [2022-12-13 19:48:20,712 INFO L226 Difference]: Without dead ends: 10350 [2022-12-13 19:48:20,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=573, Invalid=1977, Unknown=0, NotChecked=0, Total=2550 [2022-12-13 19:48:20,718 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 275 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:48:20,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 247 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 19:48:20,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10350 states. [2022-12-13 19:48:21,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10350 to 9808. [2022-12-13 19:48:21,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9808 states, 6809 states have (on average 1.0734322220590395) internal successors, (7309), 7016 states have internal predecessors, (7309), 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) [2022-12-13 19:48:21,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9808 states to 9808 states and 15764 transitions. [2022-12-13 19:48:21,469 INFO L78 Accepts]: Start accepts. Automaton has 9808 states and 15764 transitions. Word has length 68 [2022-12-13 19:48:21,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:48:21,469 INFO L495 AbstractCegarLoop]: Abstraction has 9808 states and 15764 transitions. [2022-12-13 19:48:21,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 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) [2022-12-13 19:48:21,470 INFO L276 IsEmpty]: Start isEmpty. Operand 9808 states and 15764 transitions. [2022-12-13 19:48:21,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-13 19:48:21,472 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:48:21,472 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 19:48:21,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 19:48:21,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 19:48:21,672 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:48:21,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:48:21,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1903746682, now seen corresponding path program 2 times [2022-12-13 19:48:21,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:48:21,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947051620] [2022-12-13 19:48:21,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:21,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:48:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:21,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:48:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:21,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:48:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:21,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:48:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:21,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:48:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:21,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:48:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:21,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 19:48:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:21,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 19:48:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 83 proven. 28 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 19:48:21,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:48:21,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947051620] [2022-12-13 19:48:21,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947051620] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:48:21,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950218723] [2022-12-13 19:48:21,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:48:21,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:21,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:48:21,804 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:48:21,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 19:48:21,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:48:21,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:48:21,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:48:21,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:48:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 85 proven. 15 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-12-13 19:48:21,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:48:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 85 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 19:48:22,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950218723] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:48:22,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:48:22,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 8] total 14 [2022-12-13 19:48:22,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596091072] [2022-12-13 19:48:22,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:48:22,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 19:48:22,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:48:22,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 19:48:22,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-12-13 19:48:22,175 INFO L87 Difference]: Start difference. First operand 9808 states and 15764 transitions. Second operand has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 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) [2022-12-13 19:48:22,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:48:22,977 INFO L93 Difference]: Finished difference Result 18920 states and 34325 transitions. [2022-12-13 19:48:22,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 19:48:22,978 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 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 81 [2022-12-13 19:48:22,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:48:23,013 INFO L225 Difference]: With dead ends: 18920 [2022-12-13 19:48:23,013 INFO L226 Difference]: Without dead ends: 10752 [2022-12-13 19:48:23,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 168 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2022-12-13 19:48:23,048 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 32 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:48:23,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 112 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:48:23,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10752 states. [2022-12-13 19:48:23,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10752 to 9802. [2022-12-13 19:48:23,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9802 states, 6806 states have (on average 1.0734645900675874) internal successors, (7306), 7013 states have internal predecessors, (7306), 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) [2022-12-13 19:48:23,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9802 states to 9802 states and 15678 transitions. [2022-12-13 19:48:23,811 INFO L78 Accepts]: Start accepts. Automaton has 9802 states and 15678 transitions. Word has length 81 [2022-12-13 19:48:23,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:48:23,811 INFO L495 AbstractCegarLoop]: Abstraction has 9802 states and 15678 transitions. [2022-12-13 19:48:23,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 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) [2022-12-13 19:48:23,812 INFO L276 IsEmpty]: Start isEmpty. Operand 9802 states and 15678 transitions. [2022-12-13 19:48:23,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-13 19:48:23,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:48:23,814 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 19:48:23,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 19:48:24,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:24,015 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:48:24,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:48:24,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1307053986, now seen corresponding path program 3 times [2022-12-13 19:48:24,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:48:24,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012186676] [2022-12-13 19:48:24,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:24,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:48:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:24,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:48:24,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:24,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:48:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:24,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:48:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:24,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:48:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:24,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:48:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:24,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:48:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:24,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 19:48:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:24,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 19:48:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:24,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-12-13 19:48:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:24,228 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 117 proven. 51 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-12-13 19:48:24,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:48:24,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012186676] [2022-12-13 19:48:24,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012186676] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:48:24,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465301691] [2022-12-13 19:48:24,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:48:24,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:24,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:48:24,230 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:48:24,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 19:48:24,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 19:48:24,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:48:24,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 19:48:24,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:48:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 153 proven. 26 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-12-13 19:48:24,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:48:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 123 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-13 19:48:24,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465301691] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:48:24,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:48:24,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 17 [2022-12-13 19:48:24,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520091103] [2022-12-13 19:48:24,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:48:24,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 19:48:24,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:48:24,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 19:48:24,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-12-13 19:48:24,983 INFO L87 Difference]: Start difference. First operand 9802 states and 15678 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 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) [2022-12-13 19:48:25,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:48:25,985 INFO L93 Difference]: Finished difference Result 20475 states and 41580 transitions. [2022-12-13 19:48:25,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 19:48:25,986 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 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 100 [2022-12-13 19:48:25,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:48:26,037 INFO L225 Difference]: With dead ends: 20475 [2022-12-13 19:48:26,038 INFO L226 Difference]: Without dead ends: 12341 [2022-12-13 19:48:26,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 208 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2022-12-13 19:48:26,114 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:48:26,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 138 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:48:26,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12341 states. [2022-12-13 19:48:26,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12341 to 11980. [2022-12-13 19:48:26,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11980 states, 8084 states have (on average 1.053686293913904) internal successors, (8518), 8271 states have internal predecessors, (8518), 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) [2022-12-13 19:48:27,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11980 states to 11980 states and 19050 transitions. [2022-12-13 19:48:27,035 INFO L78 Accepts]: Start accepts. Automaton has 11980 states and 19050 transitions. Word has length 100 [2022-12-13 19:48:27,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:48:27,035 INFO L495 AbstractCegarLoop]: Abstraction has 11980 states and 19050 transitions. [2022-12-13 19:48:27,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 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) [2022-12-13 19:48:27,035 INFO L276 IsEmpty]: Start isEmpty. Operand 11980 states and 19050 transitions. [2022-12-13 19:48:27,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-13 19:48:27,038 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:48:27,038 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 7, 7, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:48:27,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 19:48:27,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 19:48:27,239 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:48:27,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:48:27,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1104252262, now seen corresponding path program 3 times [2022-12-13 19:48:27,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:48:27,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863571365] [2022-12-13 19:48:27,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:27,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:48:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:27,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:48:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:27,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:48:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:27,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:48:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:27,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 19:48:27,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 120 proven. 86 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 19:48:27,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:48:27,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863571365] [2022-12-13 19:48:27,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863571365] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:48:27,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797721498] [2022-12-13 19:48:27,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:48:27,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:27,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:48:27,520 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:48:27,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 19:48:27,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-13 19:48:27,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:48:27,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 19:48:27,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:48:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 113 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-13 19:48:27,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:48:27,775 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 142 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-13 19:48:27,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797721498] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:48:27,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:48:27,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2022-12-13 19:48:27,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848891586] [2022-12-13 19:48:27,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:48:27,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 19:48:27,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:48:27,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 19:48:27,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-12-13 19:48:27,777 INFO L87 Difference]: Start difference. First operand 11980 states and 19050 transitions. Second operand has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 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) [2022-12-13 19:48:29,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:48:29,624 INFO L93 Difference]: Finished difference Result 20826 states and 35598 transitions. [2022-12-13 19:48:29,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 19:48:29,624 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 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 87 [2022-12-13 19:48:29,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:48:29,660 INFO L225 Difference]: With dead ends: 20826 [2022-12-13 19:48:29,660 INFO L226 Difference]: Without dead ends: 10351 [2022-12-13 19:48:29,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=983, Invalid=3439, Unknown=0, NotChecked=0, Total=4422 [2022-12-13 19:48:29,711 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 217 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 19:48:29,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 162 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 19:48:29,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10351 states. [2022-12-13 19:48:30,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10351 to 8751. [2022-12-13 19:48:30,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8751 states, 5978 states have (on average 1.0463365674138507) internal successors, (6255), 6154 states have internal predecessors, (6255), 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) [2022-12-13 19:48:30,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8751 states to 8751 states and 12063 transitions. [2022-12-13 19:48:30,429 INFO L78 Accepts]: Start accepts. Automaton has 8751 states and 12063 transitions. Word has length 87 [2022-12-13 19:48:30,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:48:30,429 INFO L495 AbstractCegarLoop]: Abstraction has 8751 states and 12063 transitions. [2022-12-13 19:48:30,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 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) [2022-12-13 19:48:30,429 INFO L276 IsEmpty]: Start isEmpty. Operand 8751 states and 12063 transitions. [2022-12-13 19:48:30,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-13 19:48:30,431 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:48:30,431 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-12-13 19:48:30,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 19:48:30,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:30,632 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:48:30,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:48:30,633 INFO L85 PathProgramCache]: Analyzing trace with hash -133792040, now seen corresponding path program 3 times [2022-12-13 19:48:30,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:48:30,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768214441] [2022-12-13 19:48:30,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:30,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:48:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:48:30,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:48:30,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768214441] [2022-12-13 19:48:30,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768214441] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:48:30,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318476053] [2022-12-13 19:48:30,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:48:30,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:30,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:48:30,912 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:48:30,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 19:48:30,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-13 19:48:30,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:48:30,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 19:48:30,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:48:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:48:31,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:48:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:48:31,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318476053] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:48:31,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:48:31,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-12-13 19:48:31,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376203732] [2022-12-13 19:48:31,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:48:31,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 19:48:31,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:48:31,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 19:48:31,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-12-13 19:48:31,473 INFO L87 Difference]: Start difference. First operand 8751 states and 12063 transitions. Second operand has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 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) [2022-12-13 19:48:33,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:48:33,527 INFO L93 Difference]: Finished difference Result 15928 states and 22083 transitions. [2022-12-13 19:48:33,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-12-13 19:48:33,528 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 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 91 [2022-12-13 19:48:33,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:48:33,590 INFO L225 Difference]: With dead ends: 15928 [2022-12-13 19:48:33,590 INFO L226 Difference]: Without dead ends: 15927 [2022-12-13 19:48:33,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2022-12-13 19:48:33,595 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 1050 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 622 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 622 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 19:48:33,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1054 Valid, 734 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [622 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 19:48:33,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15927 states. [2022-12-13 19:48:34,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15927 to 15927. [2022-12-13 19:48:34,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15927 states, 10802 states have (on average 1.0456396963525274) internal successors, (11295), 11194 states have internal predecessors, (11295), 3103 states have call successors, (3103), 568 states have call predecessors, (3103), 2018 states have return successors, (7673), 4164 states have call predecessors, (7673), 3069 states have call successors, (7673) [2022-12-13 19:48:34,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15927 states to 15927 states and 22071 transitions. [2022-12-13 19:48:34,751 INFO L78 Accepts]: Start accepts. Automaton has 15927 states and 22071 transitions. Word has length 91 [2022-12-13 19:48:34,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:48:34,751 INFO L495 AbstractCegarLoop]: Abstraction has 15927 states and 22071 transitions. [2022-12-13 19:48:34,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 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) [2022-12-13 19:48:34,751 INFO L276 IsEmpty]: Start isEmpty. Operand 15927 states and 22071 transitions. [2022-12-13 19:48:34,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-13 19:48:34,753 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:48:34,754 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:48:34,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-13 19:48:34,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 19:48:34,955 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:48:34,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:48:34,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1765664819, now seen corresponding path program 4 times [2022-12-13 19:48:34,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:48:34,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823536241] [2022-12-13 19:48:34,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:34,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:48:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:35,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:48:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:35,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:48:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:35,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:48:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:35,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:48:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:35,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:48:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:35,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 19:48:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:35,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 19:48:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:35,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 19:48:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 51 proven. 69 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-12-13 19:48:35,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:48:35,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823536241] [2022-12-13 19:48:35,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823536241] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:48:35,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232985510] [2022-12-13 19:48:35,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:48:35,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:35,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:48:35,344 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:48:35,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 19:48:35,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:48:35,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:48:35,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 19:48:35,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:48:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-12-13 19:48:35,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:48:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 42 proven. 93 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-13 19:48:36,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232985510] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:48:36,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:48:36,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2022-12-13 19:48:36,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393262908] [2022-12-13 19:48:36,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:48:36,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 19:48:36,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:48:36,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 19:48:36,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 19:48:36,699 INFO L87 Difference]: Start difference. First operand 15927 states and 22071 transitions. Second operand has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 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) [2022-12-13 19:48:41,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:48:41,852 INFO L93 Difference]: Finished difference Result 45665 states and 72940 transitions. [2022-12-13 19:48:41,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-12-13 19:48:41,852 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 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 91 [2022-12-13 19:48:41,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:48:41,992 INFO L225 Difference]: With dead ends: 45665 [2022-12-13 19:48:41,992 INFO L226 Difference]: Without dead ends: 44563 [2022-12-13 19:48:42,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12181 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5454, Invalid=27126, Unknown=0, NotChecked=0, Total=32580 [2022-12-13 19:48:42,017 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 260 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 2218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 19:48:42,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 346 Invalid, 2218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 19:48:42,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44563 states. [2022-12-13 19:48:44,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44563 to 28637. [2022-12-13 19:48:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28637 states, 18550 states have (on average 1.0279784366576818) internal successors, (19069), 18925 states have internal predecessors, (19069), 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) [2022-12-13 19:48:44,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28637 states to 28637 states and 44545 transitions. [2022-12-13 19:48:44,624 INFO L78 Accepts]: Start accepts. Automaton has 28637 states and 44545 transitions. Word has length 91 [2022-12-13 19:48:44,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:48:44,625 INFO L495 AbstractCegarLoop]: Abstraction has 28637 states and 44545 transitions. [2022-12-13 19:48:44,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 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) [2022-12-13 19:48:44,625 INFO L276 IsEmpty]: Start isEmpty. Operand 28637 states and 44545 transitions. [2022-12-13 19:48:44,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-13 19:48:44,631 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:48:44,631 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2022-12-13 19:48:44,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-13 19:48:44,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 19:48:44,833 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:48:44,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:48:44,834 INFO L85 PathProgramCache]: Analyzing trace with hash 951429890, now seen corresponding path program 2 times [2022-12-13 19:48:44,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:48:44,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252517925] [2022-12-13 19:48:44,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:44,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:48:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-13 19:48:45,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:48:45,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252517925] [2022-12-13 19:48:45,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252517925] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:48:45,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508251586] [2022-12-13 19:48:45,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:48:45,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:45,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:48:45,257 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:48:45,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 19:48:45,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:48:45,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:48:45,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 19:48:45,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:48:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-13 19:48:45,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:48:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-13 19:48:45,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508251586] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:48:45,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:48:45,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-12-13 19:48:45,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792640389] [2022-12-13 19:48:45,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:48:45,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 19:48:45,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:48:45,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 19:48:45,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-12-13 19:48:45,824 INFO L87 Difference]: Start difference. First operand 28637 states and 44545 transitions. Second operand has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 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) [2022-12-13 19:48:51,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:48:51,218 INFO L93 Difference]: Finished difference Result 64750 states and 101363 transitions. [2022-12-13 19:48:51,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-12-13 19:48:51,219 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 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 141 [2022-12-13 19:48:51,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:48:51,451 INFO L225 Difference]: With dead ends: 64750 [2022-12-13 19:48:51,451 INFO L226 Difference]: Without dead ends: 64749 [2022-12-13 19:48:51,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 275 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2022-12-13 19:48:51,479 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1711 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1714 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 19:48:51,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1714 Valid, 560 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 19:48:51,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64749 states. [2022-12-13 19:48:56,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64749 to 64697. [2022-12-13 19:48:56,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64697 states, 41998 states have (on average 1.0286442211533882) internal successors, (43201), 42865 states have internal predecessors, (43201), 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) [2022-12-13 19:48:57,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64697 states to 64697 states and 101341 transitions. [2022-12-13 19:48:57,046 INFO L78 Accepts]: Start accepts. Automaton has 64697 states and 101341 transitions. Word has length 141 [2022-12-13 19:48:57,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:48:57,046 INFO L495 AbstractCegarLoop]: Abstraction has 64697 states and 101341 transitions. [2022-12-13 19:48:57,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 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) [2022-12-13 19:48:57,047 INFO L276 IsEmpty]: Start isEmpty. Operand 64697 states and 101341 transitions. [2022-12-13 19:48:57,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-12-13 19:48:57,140 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:48:57,140 INFO L195 NwaCegarLoop]: trace histogram [28, 21, 17, 17, 17, 17, 17, 16, 16, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 19:48:57,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 19:48:57,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 19:48:57,341 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:48:57,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:48:57,343 INFO L85 PathProgramCache]: Analyzing trace with hash 577749920, now seen corresponding path program 1 times [2022-12-13 19:48:57,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:48:57,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724786722] [2022-12-13 19:48:57,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:57,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:48:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:57,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-12-13 19:48:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:57,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:48:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:57,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:48:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:57,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:48:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:57,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:48:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:57,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:48:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:57,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 19:48:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:57,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 19:48:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:57,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:48:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:57,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:48:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:57,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:48:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:58,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:48:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:58,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:48:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:58,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 19:48:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:58,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 19:48:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:58,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 19:48:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:58,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-12-13 19:48:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 726 proven. 224 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-12-13 19:48:58,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:48:58,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724786722] [2022-12-13 19:48:58,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724786722] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:48:58,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735031934] [2022-12-13 19:48:58,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:58,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:58,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:48:58,067 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:48:58,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 19:48:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:58,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 19:48:58,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:48:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 715 proven. 216 refuted. 0 times theorem prover too weak. 1094 trivial. 0 not checked. [2022-12-13 19:48:58,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:48:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 731 proven. 263 refuted. 0 times theorem prover too weak. 1031 trivial. 0 not checked. [2022-12-13 19:48:59,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735031934] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:48:59,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:48:59,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 21] total 28 [2022-12-13 19:48:59,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718588331] [2022-12-13 19:48:59,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:48:59,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 19:48:59,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:48:59,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 19:48:59,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-12-13 19:48:59,930 INFO L87 Difference]: Start difference. First operand 64697 states and 101341 transitions. Second operand has 28 states, 28 states have (on average 4.464285714285714) internal successors, (125), 25 states have internal predecessors, (125), 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) [2022-12-13 19:49:07,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:49:07,508 INFO L93 Difference]: Finished difference Result 152890 states and 310323 transitions. [2022-12-13 19:49:07,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 19:49:07,509 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.464285714285714) internal successors, (125), 25 states have internal predecessors, (125), 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 250 [2022-12-13 19:49:07,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:49:08,134 INFO L225 Difference]: With dead ends: 152890 [2022-12-13 19:49:08,134 INFO L226 Difference]: Without dead ends: 94897 [2022-12-13 19:49:08,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 518 SyntacticMatches, 15 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=446, Invalid=1624, Unknown=0, NotChecked=0, Total=2070 [2022-12-13 19:49:08,541 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 125 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:49:08,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 223 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 19:49:08,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94897 states. [2022-12-13 19:49:14,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94897 to 64479. [2022-12-13 19:49:14,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64479 states, 41889 states have (on average 1.0287187567141731) internal successors, (43092), 42756 states have internal predecessors, (43092), 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) [2022-12-13 19:49:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64479 states to 64479 states and 101056 transitions. [2022-12-13 19:49:15,252 INFO L78 Accepts]: Start accepts. Automaton has 64479 states and 101056 transitions. Word has length 250 [2022-12-13 19:49:15,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:49:15,252 INFO L495 AbstractCegarLoop]: Abstraction has 64479 states and 101056 transitions. [2022-12-13 19:49:15,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.464285714285714) internal successors, (125), 25 states have internal predecessors, (125), 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) [2022-12-13 19:49:15,252 INFO L276 IsEmpty]: Start isEmpty. Operand 64479 states and 101056 transitions. [2022-12-13 19:49:15,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-12-13 19:49:15,269 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:49:15,269 INFO L195 NwaCegarLoop]: trace histogram [28, 21, 17, 14, 14, 14, 14, 14, 14, 11, 11, 10, 10, 10, 10, 8, 8, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-13 19:49:15,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 19:49:15,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:49:15,470 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:49:15,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:49:15,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1049268364, now seen corresponding path program 5 times [2022-12-13 19:49:15,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:49:15,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105338303] [2022-12-13 19:49:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:49:15,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:49:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:15,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-12-13 19:49:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:15,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:49:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:15,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:49:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:15,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:49:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:15,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 19:49:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:15,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-12-13 19:49:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:16,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:49:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:16,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:49:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:16,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:49:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:16,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:49:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:16,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:49:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:16,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:49:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:16,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:49:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:16,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:49:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:16,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 19:49:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:16,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 19:49:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:16,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 19:49:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:16,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-12-13 19:49:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:16,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-12-13 19:49:16,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:16,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-12-13 19:49:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:16,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-12-13 19:49:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2007 backedges. 472 proven. 283 refuted. 0 times theorem prover too weak. 1252 trivial. 0 not checked. [2022-12-13 19:49:16,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:49:16,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105338303] [2022-12-13 19:49:16,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105338303] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:49:16,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066165334] [2022-12-13 19:49:16,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:49:16,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:49:16,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:49:16,668 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:49:16,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 19:49:16,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-12-13 19:49:16,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:49:16,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-13 19:49:16,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:49:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2007 backedges. 1052 proven. 60 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2022-12-13 19:49:17,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:49:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2007 backedges. 253 proven. 618 refuted. 0 times theorem prover too weak. 1136 trivial. 0 not checked. [2022-12-13 19:49:17,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066165334] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:49:17,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:49:17,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 19, 21] total 52 [2022-12-13 19:49:17,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157048375] [2022-12-13 19:49:17,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:49:17,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-13 19:49:17,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:49:17,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-13 19:49:17,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=2396, Unknown=0, NotChecked=0, Total=2652 [2022-12-13 19:49:17,351 INFO L87 Difference]: Start difference. First operand 64479 states and 101056 transitions. Second operand has 52 states, 52 states have (on average 2.3076923076923075) internal successors, (120), 36 states have internal predecessors, (120), 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) [2022-12-13 19:49:29,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:49:29,553 INFO L93 Difference]: Finished difference Result 163674 states and 354631 transitions. [2022-12-13 19:49:29,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2022-12-13 19:49:29,554 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.3076923076923075) internal successors, (120), 36 states have internal predecessors, (120), 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) Word has length 252 [2022-12-13 19:49:29,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:49:30,183 INFO L225 Difference]: With dead ends: 163674 [2022-12-13 19:49:30,184 INFO L226 Difference]: Without dead ends: 100364 [2022-12-13 19:49:30,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 828 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39206 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=11440, Invalid=77662, Unknown=0, NotChecked=0, Total=89102 [2022-12-13 19:49:30,535 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 457 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 1880 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 4910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1880 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-13 19:49:30,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 526 Invalid, 4910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1880 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-13 19:49:30,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100364 states. [2022-12-13 19:49:35,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100364 to 31518. [2022-12-13 19:49:35,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31518 states, 20278 states have (on average 1.0158792780353092) internal successors, (20600), 20223 states have internal predecessors, (20600), 6456 states have call successors, (6456), 830 states have call predecessors, (6456), 4780 states have return successors, (27585), 10464 states have call predecessors, (27585), 6446 states have call successors, (27585) [2022-12-13 19:49:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31518 states to 31518 states and 54641 transitions. [2022-12-13 19:49:36,066 INFO L78 Accepts]: Start accepts. Automaton has 31518 states and 54641 transitions. Word has length 252 [2022-12-13 19:49:36,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:49:36,067 INFO L495 AbstractCegarLoop]: Abstraction has 31518 states and 54641 transitions. [2022-12-13 19:49:36,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.3076923076923075) internal successors, (120), 36 states have internal predecessors, (120), 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) [2022-12-13 19:49:36,067 INFO L276 IsEmpty]: Start isEmpty. Operand 31518 states and 54641 transitions. [2022-12-13 19:49:36,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-12-13 19:49:36,072 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:49:36,072 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2022-12-13 19:49:36,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 19:49:36,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:49:36,273 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:49:36,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:49:36,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1976258784, now seen corresponding path program 4 times [2022-12-13 19:49:36,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:49:36,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310640151] [2022-12-13 19:49:36,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:49:36,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:49:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:37,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:49:37,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:49:37,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310640151] [2022-12-13 19:49:37,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310640151] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:49:37,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706787882] [2022-12-13 19:49:37,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:49:37,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:49:37,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:49:37,090 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:49:37,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 19:49:37,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:49:37,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:49:37,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 19:49:37,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:49:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:49:37,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:49:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:49:38,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706787882] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:49:38,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:49:38,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2022-12-13 19:49:38,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193281893] [2022-12-13 19:49:38,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:49:38,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-12-13 19:49:38,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:49:38,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-12-13 19:49:38,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2260, Invalid=6860, Unknown=0, NotChecked=0, Total=9120 [2022-12-13 19:49:38,451 INFO L87 Difference]: Start difference. First operand 31518 states and 54641 transitions. Second operand has 96 states, 93 states have (on average 3.4946236559139785) internal successors, (325), 50 states have internal predecessors, (325), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:49:44,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:49:44,757 INFO L93 Difference]: Finished difference Result 33703 states and 57953 transitions. [2022-12-13 19:49:44,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-12-13 19:49:44,758 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 93 states have (on average 3.4946236559139785) internal successors, (325), 50 states have internal predecessors, (325), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2022-12-13 19:49:44,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:49:44,884 INFO L225 Difference]: With dead ends: 33703 [2022-12-13 19:49:44,884 INFO L226 Difference]: Without dead ends: 33702 [2022-12-13 19:49:44,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8376 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=10814, Invalid=23968, Unknown=0, NotChecked=0, Total=34782 [2022-12-13 19:49:44,903 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 2373 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 2209 mSolverCounterSat, 1293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2377 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 3502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1293 IncrementalHoareTripleChecker+Valid, 2209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 19:49:44,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2377 Valid, 1366 Invalid, 3502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1293 Valid, 2209 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 19:49:44,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33702 states. [2022-12-13 19:49:47,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33702 to 33702. [2022-12-13 19:49:47,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33702 states, 21646 states have (on average 1.015984477501617) internal successors, (21992), 21615 states have internal predecessors, (21992), 6888 states have call successors, (6888), 854 states have call predecessors, (6888), 5164 states have return successors, (29049), 11232 states have call predecessors, (29049), 6878 states have call successors, (29049) [2022-12-13 19:49:48,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33702 states to 33702 states and 57929 transitions. [2022-12-13 19:49:48,138 INFO L78 Accepts]: Start accepts. Automaton has 33702 states and 57929 transitions. Word has length 187 [2022-12-13 19:49:48,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:49:48,138 INFO L495 AbstractCegarLoop]: Abstraction has 33702 states and 57929 transitions. [2022-12-13 19:49:48,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 93 states have (on average 3.4946236559139785) internal successors, (325), 50 states have internal predecessors, (325), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:49:48,139 INFO L276 IsEmpty]: Start isEmpty. Operand 33702 states and 57929 transitions. [2022-12-13 19:49:48,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-12-13 19:49:48,143 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:49:48,144 INFO L195 NwaCegarLoop]: trace histogram [20, 18, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:49:48,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 19:49:48,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-13 19:49:48,345 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:49:48,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:49:48,346 INFO L85 PathProgramCache]: Analyzing trace with hash -629439263, now seen corresponding path program 6 times [2022-12-13 19:49:48,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:49:48,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419164364] [2022-12-13 19:49:48,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:49:48,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:49:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:48,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:49:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:48,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:49:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:48,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:49:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:49,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:49:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:49,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:49:49,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:49,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:49:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:49,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:49:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:49,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:49:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:49,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:49:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:49,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:49:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:49,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 19:49:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:49,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 19:49:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:49,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 19:49:49,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:49,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-12-13 19:49:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:49,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-12-13 19:49:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:49,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-12-13 19:49:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:49,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-12-13 19:49:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:49,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-12-13 19:49:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:49,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 161 proven. 359 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2022-12-13 19:49:49,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:49:49,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419164364] [2022-12-13 19:49:49,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419164364] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:49:49,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194642698] [2022-12-13 19:49:49,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:49:49,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:49:49,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:49:49,578 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:49:49,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 19:49:49,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-12-13 19:49:49,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:49:49,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-13 19:49:49,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:49:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 119 proven. 361 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2022-12-13 19:49:49,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:49:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 137 proven. 523 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-12-13 19:49:58,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194642698] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:49:58,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:49:58,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32, 48] total 82 [2022-12-13 19:49:58,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730505174] [2022-12-13 19:49:58,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:49:58,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-13 19:49:58,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:49:58,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-13 19:49:58,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=767, Invalid=6039, Unknown=0, NotChecked=0, Total=6806 [2022-12-13 19:49:58,764 INFO L87 Difference]: Start difference. First operand 33702 states and 57929 transitions. Second operand has 83 states, 82 states have (on average 1.646341463414634) internal successors, (135), 63 states have internal predecessors, (135), 19 states have call successors, (21), 3 states have call predecessors, (21), 29 states have return successors, (37), 36 states have call predecessors, (37), 17 states have call successors, (37) [2022-12-13 19:50:35,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:50:35,103 INFO L93 Difference]: Finished difference Result 375329 states and 831765 transitions. [2022-12-13 19:50:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 823 states. [2022-12-13 19:50:35,103 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.646341463414634) internal successors, (135), 63 states have internal predecessors, (135), 19 states have call successors, (21), 3 states have call predecessors, (21), 29 states have return successors, (37), 36 states have call predecessors, (37), 17 states have call successors, (37) Word has length 186 [2022-12-13 19:50:35,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:50:38,225 INFO L225 Difference]: With dead ends: 375329 [2022-12-13 19:50:38,225 INFO L226 Difference]: Without dead ends: 374742 [2022-12-13 19:50:38,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1266 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 899 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429897 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=135659, Invalid=675241, Unknown=0, NotChecked=0, Total=810900 [2022-12-13 19:50:38,658 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 441 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 5200 mSolverCounterSat, 3837 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 9037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3837 IncrementalHoareTripleChecker+Valid, 5200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:50:38,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 616 Invalid, 9037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3837 Valid, 5200 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-12-13 19:50:38,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374742 states. [2022-12-13 19:51:23,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374742 to 43047. [2022-12-13 19:51:23,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43047 states, 27256 states have (on average 1.0126577634282359) internal successors, (27601), 27204 states have internal predecessors, (27601), 9139 states have call successors, (9139), 937 states have call predecessors, (9139), 6648 states have return successors, (29919), 14905 states have call predecessors, (29919), 9129 states have call successors, (29919) [2022-12-13 19:51:23,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43047 states to 43047 states and 66659 transitions. [2022-12-13 19:51:23,491 INFO L78 Accepts]: Start accepts. Automaton has 43047 states and 66659 transitions. Word has length 186 [2022-12-13 19:51:23,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:51:23,491 INFO L495 AbstractCegarLoop]: Abstraction has 43047 states and 66659 transitions. [2022-12-13 19:51:23,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.646341463414634) internal successors, (135), 63 states have internal predecessors, (135), 19 states have call successors, (21), 3 states have call predecessors, (21), 29 states have return successors, (37), 36 states have call predecessors, (37), 17 states have call successors, (37) [2022-12-13 19:51:23,492 INFO L276 IsEmpty]: Start isEmpty. Operand 43047 states and 66659 transitions. [2022-12-13 19:51:23,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-12-13 19:51:23,513 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:51:23,513 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2022-12-13 19:51:23,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-13 19:51:23,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:51:23,714 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:51:23,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:51:23,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1071312486, now seen corresponding path program 3 times [2022-12-13 19:51:23,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:51:23,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060419776] [2022-12-13 19:51:23,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:51:23,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:51:23,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4602 backedges. 0 proven. 4539 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-13 19:51:25,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:51:25,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060419776] [2022-12-13 19:51:25,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060419776] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:51:25,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378812083] [2022-12-13 19:51:25,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:51:25,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:51:25,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:51:25,431 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:51:25,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 19:51:25,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2022-12-13 19:51:25,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:51:25,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 90 conjunts are in the unsatisfiable core [2022-12-13 19:51:25,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:51:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4602 backedges. 0 proven. 4539 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-13 19:51:25,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:51:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4602 backedges. 0 proven. 4539 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-13 19:51:27,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378812083] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:51:27,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:51:27,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2022-12-13 19:51:27,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204768764] [2022-12-13 19:51:27,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:51:27,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-12-13 19:51:27,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:51:27,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-12-13 19:51:27,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2260, Invalid=6860, Unknown=0, NotChecked=0, Total=9120 [2022-12-13 19:51:27,504 INFO L87 Difference]: Start difference. First operand 43047 states and 66659 transitions. Second operand has 96 states, 95 states have (on average 4.673684210526316) internal successors, (444), 50 states have internal predecessors, (444), 46 states have call successors, (88), 46 states have call predecessors, (88), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:51:39,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:51:39,256 INFO L93 Difference]: Finished difference Result 86074 states and 134339 transitions. [2022-12-13 19:51:39,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-12-13 19:51:39,257 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 4.673684210526316) internal successors, (444), 50 states have internal predecessors, (444), 46 states have call successors, (88), 46 states have call predecessors, (88), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 309 [2022-12-13 19:51:39,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:51:39,571 INFO L225 Difference]: With dead ends: 86074 [2022-12-13 19:51:39,571 INFO L226 Difference]: Without dead ends: 86073 [2022-12-13 19:51:39,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 611 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8376 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=10814, Invalid=23968, Unknown=0, NotChecked=0, Total=34782 [2022-12-13 19:51:39,604 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 4592 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 2007 mSolverCounterSat, 1839 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4595 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 3846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1839 IncrementalHoareTripleChecker+Valid, 2007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-13 19:51:39,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4595 Valid, 1031 Invalid, 3846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1839 Valid, 2007 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-13 19:51:39,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86073 states. [2022-12-13 19:51:48,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86073 to 85983. [2022-12-13 19:51:48,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85983 states, 54520 states have (on average 1.0124908290535584) internal successors, (55201), 54348 states have internal predecessors, (55201), 18307 states have call successors, (18307), 1945 states have call predecessors, (18307), 13152 states have return successors, (60807), 29689 states have call predecessors, (60807), 18297 states have call successors, (60807) [2022-12-13 19:51:48,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85983 states to 85983 states and 134315 transitions. [2022-12-13 19:51:48,569 INFO L78 Accepts]: Start accepts. Automaton has 85983 states and 134315 transitions. Word has length 309 [2022-12-13 19:51:48,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:51:48,570 INFO L495 AbstractCegarLoop]: Abstraction has 85983 states and 134315 transitions. [2022-12-13 19:51:48,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 4.673684210526316) internal successors, (444), 50 states have internal predecessors, (444), 46 states have call successors, (88), 46 states have call predecessors, (88), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:51:48,570 INFO L276 IsEmpty]: Start isEmpty. Operand 85983 states and 134315 transitions. [2022-12-13 19:51:48,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2022-12-13 19:51:48,594 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:51:48,594 INFO L195 NwaCegarLoop]: trace histogram [54, 38, 37, 32, 32, 32, 32, 31, 31, 16, 16, 16, 16, 16, 16, 15, 15, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-12-13 19:51:48,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-13 19:51:48,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:51:48,795 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:51:48,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:51:48,796 INFO L85 PathProgramCache]: Analyzing trace with hash 541042830, now seen corresponding path program 2 times [2022-12-13 19:51:48,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:51:48,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536265085] [2022-12-13 19:51:48,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:51:48,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:51:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:49,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-12-13 19:51:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:49,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:51:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:49,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:51:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:49,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:51:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:49,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:51:49,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:49,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:51:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:51:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:51:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 19:51:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 19:51:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:51:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:51:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:51:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:51:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 19:51:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 19:51:50,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 19:51:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-12-13 19:51:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:51:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:51:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:51:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:51:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:51:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:51:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:51:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:51:50,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:51:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:51:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 19:51:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 19:51:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 19:51:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-12-13 19:51:50,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-12-13 19:51:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-12-13 19:51:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-12-13 19:51:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-12-13 19:51:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-12-13 19:51:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7991 backedges. 1264 proven. 3653 refuted. 0 times theorem prover too weak. 3074 trivial. 0 not checked. [2022-12-13 19:51:50,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:51:50,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536265085] [2022-12-13 19:51:50,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536265085] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:51:50,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910604717] [2022-12-13 19:51:50,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:51:50,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:51:50,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:51:50,626 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:51:50,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 19:51:50,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:51:50,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:51:50,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-13 19:51:50,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:51:51,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7991 backedges. 542 proven. 3684 refuted. 0 times theorem prover too weak. 3765 trivial. 0 not checked. [2022-12-13 19:51:51,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:51:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7991 backedges. 542 proven. 3760 refuted. 0 times theorem prover too weak. 3689 trivial. 0 not checked. [2022-12-13 19:51:52,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910604717] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:51:52,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:51:52,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 15] total 24 [2022-12-13 19:51:52,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118684377] [2022-12-13 19:51:52,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:51:52,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 19:51:52,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:51:52,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 19:51:52,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-12-13 19:51:52,619 INFO L87 Difference]: Start difference. First operand 85983 states and 134315 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 23 states have internal predecessors, (125), 17 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2022-12-13 19:52:01,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:52:01,325 INFO L93 Difference]: Finished difference Result 165366 states and 345606 transitions. [2022-12-13 19:52:01,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 19:52:01,326 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 23 states have internal predecessors, (125), 17 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) Word has length 487 [2022-12-13 19:52:01,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:52:01,677 INFO L225 Difference]: With dead ends: 165366 [2022-12-13 19:52:01,677 INFO L226 Difference]: Without dead ends: 80580 [2022-12-13 19:52:02,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1124 GetRequests, 1050 SyntacticMatches, 42 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=837, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 19:52:02,148 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 98 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:52:02,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 296 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 19:52:02,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80580 states. [2022-12-13 19:52:10,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80580 to 77402. [2022-12-13 19:52:10,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77402 states, 50631 states have (on average 1.0170053919535462) internal successors, (51492), 50324 states have internal predecessors, (51492), 14708 states have call successors, (14708), 2351 states have call predecessors, (14708), 12059 states have return successors, (60486), 24726 states have call predecessors, (60486), 14472 states have call successors, (60486) [2022-12-13 19:52:10,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77402 states to 77402 states and 126686 transitions. [2022-12-13 19:52:10,802 INFO L78 Accepts]: Start accepts. Automaton has 77402 states and 126686 transitions. Word has length 487 [2022-12-13 19:52:10,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:52:10,803 INFO L495 AbstractCegarLoop]: Abstraction has 77402 states and 126686 transitions. [2022-12-13 19:52:10,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 23 states have internal predecessors, (125), 17 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2022-12-13 19:52:10,803 INFO L276 IsEmpty]: Start isEmpty. Operand 77402 states and 126686 transitions. [2022-12-13 19:52:10,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-12-13 19:52:10,845 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:52:10,845 INFO L195 NwaCegarLoop]: trace histogram [56, 50, 31, 27, 27, 27, 27, 27, 27, 25, 25, 24, 24, 24, 24, 22, 22, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 19:52:10,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-13 19:52:11,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:52:11,046 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-12-13 19:52:11,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:11,047 INFO L85 PathProgramCache]: Analyzing trace with hash -285314577, now seen corresponding path program 7 times [2022-12-13 19:52:11,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:52:11,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105697367] [2022-12-13 19:52:11,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:11,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:52:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:12,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 19:52:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:12,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:52:12,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:12,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:52:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:12,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:52:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:12,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:52:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:12,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 19:52:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:12,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 19:52:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:12,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:52:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:12,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:52:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:12,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:52:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:12,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:52:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:12,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 19:52:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:12,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 19:52:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:12,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 19:52:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:12,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-12-13 19:52:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:13,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:52:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:13,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:52:13,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:14,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:52:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:14,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:52:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:15,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:52:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:15,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:52:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:15,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:52:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:16,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:52:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:16,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:52:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:16,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:52:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:16,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:52:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:16,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:52:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:16,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:52:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:16,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:52:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:52:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:52:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 19:52:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 19:52:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 19:52:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 19:52:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 19:52:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-12-13 19:52:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-12-13 19:52:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-12-13 19:52:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-12-13 19:52:17,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-12-13 19:52:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-12-13 19:52:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-12-13 19:52:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2022-12-13 19:52:17,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2022-12-13 19:52:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2022-12-13 19:52:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2022-12-13 19:52:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2022-12-13 19:52:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 309 [2022-12-13 19:52:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2022-12-13 19:52:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9157 backedges. 2385 proven. 1448 refuted. 0 times theorem prover too weak. 5324 trivial. 0 not checked. [2022-12-13 19:52:17,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:52:17,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105697367] [2022-12-13 19:52:17,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105697367] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:52:17,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231060746] [2022-12-13 19:52:17,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 19:52:17,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:52:17,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:52:17,325 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:52:17,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a529b0-13fa-4505-9dc0-02d285e3a575/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 19:52:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:17,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-13 19:52:17,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9157 backedges. 2886 proven. 2490 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2022-12-13 19:52:18,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:52:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9157 backedges. 2950 proven. 3514 refuted. 0 times theorem prover too weak. 2693 trivial. 0 not checked. [2022-12-13 19:52:34,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231060746] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:52:34,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:52:34,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 42, 66] total 125 [2022-12-13 19:52:34,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140765921] [2022-12-13 19:52:34,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:52:34,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-12-13 19:52:34,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:52:34,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-12-13 19:52:34,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=14095, Unknown=0, NotChecked=0, Total=15500 [2022-12-13 19:52:34,687 INFO L87 Difference]: Start difference. First operand 77402 states and 126686 transitions. Second operand has 125 states, 125 states have (on average 2.888) internal successors, (361), 97 states have internal predecessors, (361), 65 states have call successors, (70), 10 states have call predecessors, (70), 44 states have return successors, (101), 59 states have call predecessors, (101), 57 states have call successors, (101)