./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/Ackermann04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:37:33,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:37:33,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:37:33,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:37:33,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:37:33,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:37:33,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:37:33,384 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:37:33,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:37:33,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:37:33,388 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:37:33,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:37:33,390 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:37:33,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:37:33,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:37:33,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:37:33,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:37:33,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:37:33,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:37:33,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:37:33,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:37:33,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:37:33,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:37:33,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:37:33,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:37:33,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:37:33,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:37:33,412 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:37:33,412 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:37:33,413 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:37:33,414 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:37:33,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:37:33,415 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:37:33,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:37:33,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:37:33,417 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:37:33,418 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:37:33,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:37:33,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:37:33,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:37:33,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:37:33,421 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-11-20 05:37:33,460 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:37:33,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:37:33,460 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:37:33,461 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:37:33,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:37:33,461 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:37:33,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:37:33,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:37:33,462 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:37:33,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:37:33,463 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:37:33,463 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 05:37:33,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:37:33,464 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:37:33,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:37:33,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:37:33,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:37:33,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:37:33,465 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-20 05:37:33,465 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:37:33,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:37:33,465 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:37:33,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:37:33,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:37:33,466 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:37:33,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:37:33,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:37:33,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:37:33,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:37:33,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:37:33,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:37:33,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:37:33,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:37:33,472 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:37:33,472 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 [2021-11-20 05:37:33,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:37:33,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:37:33,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:37:33,747 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:37:33,748 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:37:33,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/recursive/Ackermann04.c [2021-11-20 05:37:33,803 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/data/c5f399561/37edb860f682410194dd6ceda49ddc0a/FLAG9b73f63ad [2021-11-20 05:37:34,233 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:37:34,234 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/sv-benchmarks/c/recursive/Ackermann04.c [2021-11-20 05:37:34,241 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/data/c5f399561/37edb860f682410194dd6ceda49ddc0a/FLAG9b73f63ad [2021-11-20 05:37:34,628 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/data/c5f399561/37edb860f682410194dd6ceda49ddc0a [2021-11-20 05:37:34,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:37:34,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:37:34,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:37:34,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:37:34,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:37:34,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2195310d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34, skipping insertion in model container [2021-11-20 05:37:34,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:37:34,657 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:37:34,808 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2021-11-20 05:37:34,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:37:34,837 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:37:34,861 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2021-11-20 05:37:34,861 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:37:34,873 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:37:34,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34 WrapperNode [2021-11-20 05:37:34,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:37:34,875 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:37:34,875 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:37:34,875 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:37:34,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,930 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2021-11-20 05:37:34,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:37:34,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:37:34,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:37:34,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:37:34,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:37:34,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:37:34,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:37:34,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:37:34,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34" (1/1) ... [2021-11-20 05:37:34,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:37:34,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:35,008 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:37:35,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:37:35,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:37:35,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:37:35,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:37:35,058 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2021-11-20 05:37:35,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2021-11-20 05:37:35,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:37:35,124 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:37:35,126 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:37:35,268 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:37:35,274 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:37:35,274 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 05:37:35,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:37:35 BoogieIcfgContainer [2021-11-20 05:37:35,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:37:35,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:37:35,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:37:35,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:37:35,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:37:34" (1/3) ... [2021-11-20 05:37:35,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3f753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:37:35, skipping insertion in model container [2021-11-20 05:37:35,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:34" (2/3) ... [2021-11-20 05:37:35,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3f753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:37:35, skipping insertion in model container [2021-11-20 05:37:35,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:37:35" (3/3) ... [2021-11-20 05:37:35,295 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2021-11-20 05:37:35,300 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:37:35,300 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-11-20 05:37:35,349 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:37:35,356 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 05:37:35,356 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-11-20 05:37:35,377 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 05:37:35,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 05:37:35,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:35,382 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:35,383 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:37:35,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:35,388 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2021-11-20 05:37:35,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:35,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328169795] [2021-11-20 05:37:35,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:35,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:35,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:37:35,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:35,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328169795] [2021-11-20 05:37:35,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328169795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:37:35,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:37:35,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:37:35,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286681175] [2021-11-20 05:37:35,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:37:35,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:37:35,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:35,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:37:35,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:37:35,637 INFO L87 Difference]: Start difference. First operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:35,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:35,770 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-11-20 05:37:35,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:37:35,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 05:37:35,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:35,787 INFO L225 Difference]: With dead ends: 73 [2021-11-20 05:37:35,787 INFO L226 Difference]: Without dead ends: 59 [2021-11-20 05:37:35,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:37:35,793 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:35,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 125 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:37:35,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-20 05:37:35,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2021-11-20 05:37:35,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 42 states have internal predecessors, (52), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 05:37:35,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2021-11-20 05:37:35,849 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2021-11-20 05:37:35,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:35,849 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2021-11-20 05:37:35,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:35,850 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2021-11-20 05:37:35,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 05:37:35,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:35,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:35,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:37:35,851 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:37:35,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:35,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2021-11-20 05:37:35,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:35,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649768315] [2021-11-20 05:37:35,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:35,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:37:35,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:35,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649768315] [2021-11-20 05:37:35,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649768315] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:37:35,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:37:35,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:37:35,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014404929] [2021-11-20 05:37:35,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:37:35,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:37:35,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:35,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:37:35,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:37:35,913 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:36,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:36,004 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-11-20 05:37:36,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:37:36,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 05:37:36,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:36,009 INFO L225 Difference]: With dead ends: 51 [2021-11-20 05:37:36,009 INFO L226 Difference]: Without dead ends: 49 [2021-11-20 05:37:36,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:37:36,012 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:36,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 47 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:37:36,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-20 05:37:36,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-20 05:37:36,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.411764705882353) internal successors, (48), 40 states have internal predecessors, (48), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 05:37:36,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2021-11-20 05:37:36,028 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 9 [2021-11-20 05:37:36,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:36,028 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2021-11-20 05:37:36,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:36,029 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2021-11-20 05:37:36,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 05:37:36,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:36,029 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:36,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:37:36,030 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:37:36,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:36,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2021-11-20 05:37:36,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:36,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799906209] [2021-11-20 05:37:36,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:36,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:36,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:37:36,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:36,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799906209] [2021-11-20 05:37:36,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799906209] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:37:36,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:37:36,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:37:36,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705080916] [2021-11-20 05:37:36,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:37:36,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:37:36,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:36,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:37:36,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:37:36,152 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:36,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:36,252 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-11-20 05:37:36,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:37:36,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 05:37:36,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:36,259 INFO L225 Difference]: With dead ends: 76 [2021-11-20 05:37:36,259 INFO L226 Difference]: Without dead ends: 74 [2021-11-20 05:37:36,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:37:36,261 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 39 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:36,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 104 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:37:36,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-20 05:37:36,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-11-20 05:37:36,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 55 states have internal predecessors, (67), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 05:37:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2021-11-20 05:37:36,286 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 9 [2021-11-20 05:37:36,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:36,287 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2021-11-20 05:37:36,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:36,287 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2021-11-20 05:37:36,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 05:37:36,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:36,288 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:36,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 05:37:36,289 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:37:36,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:36,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2021-11-20 05:37:36,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:36,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840865219] [2021-11-20 05:37:36,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:36,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:37:36,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:36,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840865219] [2021-11-20 05:37:36,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840865219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:37:36,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:37:36,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:37:36,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568889911] [2021-11-20 05:37:36,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:37:36,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:37:36,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:36,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:37:36,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:37:36,335 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:36,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:36,420 INFO L93 Difference]: Finished difference Result 116 states and 154 transitions. [2021-11-20 05:37:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:37:36,421 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 05:37:36,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:36,423 INFO L225 Difference]: With dead ends: 116 [2021-11-20 05:37:36,423 INFO L226 Difference]: Without dead ends: 108 [2021-11-20 05:37:36,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:37:36,426 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 39 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:36,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 103 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:37:36,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-20 05:37:36,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2021-11-20 05:37:36,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 81 states have internal predecessors, (97), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 05:37:36,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2021-11-20 05:37:36,447 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 10 [2021-11-20 05:37:36,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:36,448 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2021-11-20 05:37:36,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:36,448 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2021-11-20 05:37:36,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 05:37:36,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:36,449 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:36,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 05:37:36,450 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:37:36,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:36,451 INFO L85 PathProgramCache]: Analyzing trace with hash 219392943, now seen corresponding path program 1 times [2021-11-20 05:37:36,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:36,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072517950] [2021-11-20 05:37:36,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:36,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:37:36,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:36,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072517950] [2021-11-20 05:37:36,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072517950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:37:36,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:37:36,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:37:36,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086516945] [2021-11-20 05:37:36,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:37:36,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:37:36,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:36,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:37:36,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:37:36,496 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:36,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:36,541 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2021-11-20 05:37:36,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:37:36,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 05:37:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:36,543 INFO L225 Difference]: With dead ends: 168 [2021-11-20 05:37:36,543 INFO L226 Difference]: Without dead ends: 97 [2021-11-20 05:37:36,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:37:36,547 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:36,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 89 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:37:36,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-20 05:37:36,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-11-20 05:37:36,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.295774647887324) internal successors, (92), 78 states have internal predecessors, (92), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-20 05:37:36,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2021-11-20 05:37:36,564 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 16 [2021-11-20 05:37:36,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:36,564 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2021-11-20 05:37:36,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:36,565 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2021-11-20 05:37:36,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 05:37:36,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:36,566 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:36,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 05:37:36,567 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:37:36,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:36,568 INFO L85 PathProgramCache]: Analyzing trace with hash 219399894, now seen corresponding path program 1 times [2021-11-20 05:37:36,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:36,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316018741] [2021-11-20 05:37:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:36,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:37:36,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:36,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316018741] [2021-11-20 05:37:36,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316018741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:36,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54637876] [2021-11-20 05:37:36,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:36,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:36,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:36,659 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:36,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:37:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:36,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:37:36,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:37:36,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:37:36,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54637876] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:36,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:37:36,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-20 05:37:36,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503211553] [2021-11-20 05:37:36,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:36,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 05:37:36,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:36,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 05:37:36,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:37:36,884 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:37,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:37,188 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2021-11-20 05:37:37,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 05:37:37,191 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 05:37:37,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:37,204 INFO L225 Difference]: With dead ends: 274 [2021-11-20 05:37:37,204 INFO L226 Difference]: Without dead ends: 272 [2021-11-20 05:37:37,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:37:37,214 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 250 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:37,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 180 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:37:37,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-20 05:37:37,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2021-11-20 05:37:37,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 182 states have (on average 1.2637362637362637) internal successors, (230), 189 states have internal predecessors, (230), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-20 05:37:37,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2021-11-20 05:37:37,261 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 16 [2021-11-20 05:37:37,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:37,262 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2021-11-20 05:37:37,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:37,262 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2021-11-20 05:37:37,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 05:37:37,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:37,263 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:37,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:37,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 05:37:37,491 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:37:37,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:37,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1162887243, now seen corresponding path program 1 times [2021-11-20 05:37:37,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:37,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522058155] [2021-11-20 05:37:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:37,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:37:37,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:37,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522058155] [2021-11-20 05:37:37,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522058155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:37,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612061538] [2021-11-20 05:37:37,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:37,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:37,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:37,554 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:37,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:37:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:37,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:37:37,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:37:37,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:37:37,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612061538] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:37:37,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:37:37,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-20 05:37:37,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316479009] [2021-11-20 05:37:37,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:37:37,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:37:37,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:37,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:37:37,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:37:37,698 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:37,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:37,793 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2021-11-20 05:37:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:37:37,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-20 05:37:37,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:37,801 INFO L225 Difference]: With dead ends: 328 [2021-11-20 05:37:37,801 INFO L226 Difference]: Without dead ends: 327 [2021-11-20 05:37:37,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:37:37,807 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 49 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:37,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 91 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:37:37,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-20 05:37:37,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2021-11-20 05:37:37,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 227 states have (on average 1.2599118942731278) internal successors, (286), 234 states have internal predecessors, (286), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-20 05:37:37,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2021-11-20 05:37:37,880 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 17 [2021-11-20 05:37:37,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:37,881 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2021-11-20 05:37:37,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:37,881 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2021-11-20 05:37:37,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 05:37:37,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:37,883 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:37,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:38,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:38,095 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:37:38,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:38,095 INFO L85 PathProgramCache]: Analyzing trace with hash 523262015, now seen corresponding path program 1 times [2021-11-20 05:37:38,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:38,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973278712] [2021-11-20 05:37:38,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:38,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:37:38,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:38,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973278712] [2021-11-20 05:37:38,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973278712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:38,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647092966] [2021-11-20 05:37:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:38,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:38,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:38,154 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:38,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:37:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:38,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:37:38,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:37:38,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:38,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:37:38,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647092966] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:38,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:37:38,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-20 05:37:38,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692403518] [2021-11-20 05:37:38,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:38,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 05:37:38,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:38,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 05:37:38,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:37:38,346 INFO L87 Difference]: Start difference. First operand 293 states and 373 transitions. Second operand has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:38,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:38,606 INFO L93 Difference]: Finished difference Result 591 states and 792 transitions. [2021-11-20 05:37:38,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 05:37:38,611 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-20 05:37:38,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:38,617 INFO L225 Difference]: With dead ends: 591 [2021-11-20 05:37:38,617 INFO L226 Difference]: Without dead ends: 590 [2021-11-20 05:37:38,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:37:38,622 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 167 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:38,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 237 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:37:38,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-11-20 05:37:38,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 521. [2021-11-20 05:37:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 407 states have (on average 1.203931203931204) internal successors, (490), 414 states have internal predecessors, (490), 81 states have call successors, (81), 28 states have call predecessors, (81), 27 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2021-11-20 05:37:38,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2021-11-20 05:37:38,682 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 20 [2021-11-20 05:37:38,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:38,684 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2021-11-20 05:37:38,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:38,684 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2021-11-20 05:37:38,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 05:37:38,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:38,691 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:38,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-20 05:37:38,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:38,919 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:37:38,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:38,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2021-11-20 05:37:38,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:38,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615105114] [2021-11-20 05:37:38,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:38,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:38,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:37:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:37:39,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:39,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615105114] [2021-11-20 05:37:39,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615105114] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:39,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512230596] [2021-11-20 05:37:39,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:39,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:39,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:39,050 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:39,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:37:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:39,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:37:39,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:37:39,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:37:39,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512230596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:39,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:37:39,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-11-20 05:37:39,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344693815] [2021-11-20 05:37:39,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:39,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 05:37:39,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:39,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 05:37:39,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:37:39,370 INFO L87 Difference]: Start difference. First operand 521 states and 649 transitions. Second operand has 15 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:37:39,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:39,741 INFO L93 Difference]: Finished difference Result 870 states and 1257 transitions. [2021-11-20 05:37:39,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 05:37:39,742 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-11-20 05:37:39,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:39,750 INFO L225 Difference]: With dead ends: 870 [2021-11-20 05:37:39,750 INFO L226 Difference]: Without dead ends: 868 [2021-11-20 05:37:39,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2021-11-20 05:37:39,754 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 178 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:39,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 140 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:37:39,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-11-20 05:37:39,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 728. [2021-11-20 05:37:39,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 542 states have (on average 1.2011070110701108) internal successors, (651), 572 states have internal predecessors, (651), 123 states have call successors, (123), 35 states have call predecessors, (123), 57 states have return successors, (215), 120 states have call predecessors, (215), 119 states have call successors, (215) [2021-11-20 05:37:39,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 989 transitions. [2021-11-20 05:37:39,836 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 989 transitions. Word has length 24 [2021-11-20 05:37:39,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:39,838 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 989 transitions. [2021-11-20 05:37:39,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:37:39,838 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 989 transitions. [2021-11-20 05:37:39,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 05:37:39,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:39,841 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:39,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:40,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:40,058 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:37:40,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:40,058 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2021-11-20 05:37:40,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:40,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483102113] [2021-11-20 05:37:40,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:40,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:40,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:37:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:37:40,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:40,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483102113] [2021-11-20 05:37:40,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483102113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:40,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36498861] [2021-11-20 05:37:40,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:40,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:40,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:40,166 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:40,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:37:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:40,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:37:40,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:37:40,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:37:40,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36498861] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:37:40,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:37:40,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-11-20 05:37:40,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253000848] [2021-11-20 05:37:40,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:37:40,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:37:40,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:40,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:37:40,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:37:40,270 INFO L87 Difference]: Start difference. First operand 728 states and 989 transitions. Second operand has 5 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:37:40,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:40,380 INFO L93 Difference]: Finished difference Result 737 states and 999 transitions. [2021-11-20 05:37:40,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:37:40,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-11-20 05:37:40,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:40,389 INFO L225 Difference]: With dead ends: 737 [2021-11-20 05:37:40,389 INFO L226 Difference]: Without dead ends: 736 [2021-11-20 05:37:40,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:37:40,391 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 41 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:40,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 111 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:37:40,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-11-20 05:37:40,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 727. [2021-11-20 05:37:40,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 542 states have (on average 1.1863468634686347) internal successors, (643), 571 states have internal predecessors, (643), 123 states have call successors, (123), 35 states have call predecessors, (123), 57 states have return successors, (215), 120 states have call predecessors, (215), 119 states have call successors, (215) [2021-11-20 05:37:40,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 981 transitions. [2021-11-20 05:37:40,451 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 981 transitions. Word has length 25 [2021-11-20 05:37:40,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:40,452 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 981 transitions. [2021-11-20 05:37:40,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:37:40,452 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 981 transitions. [2021-11-20 05:37:40,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 05:37:40,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:40,454 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:40,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:40,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:40,671 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:37:40,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:40,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1583952330, now seen corresponding path program 1 times [2021-11-20 05:37:40,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:40,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874512534] [2021-11-20 05:37:40,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:40,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:40,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:37:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:37:40,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:40,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874512534] [2021-11-20 05:37:40,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874512534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:40,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714007595] [2021-11-20 05:37:40,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:40,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:40,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:40,791 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:40,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:37:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:40,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:37:40,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:37:40,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:37:41,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714007595] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:41,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:37:41,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2021-11-20 05:37:41,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108731469] [2021-11-20 05:37:41,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:37:41,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:37:41,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:41,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:37:41,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:37:41,058 INFO L87 Difference]: Start difference. First operand 727 states and 981 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:37:41,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:41,269 INFO L93 Difference]: Finished difference Result 886 states and 1251 transitions. [2021-11-20 05:37:41,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:37:41,270 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-11-20 05:37:41,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:41,277 INFO L225 Difference]: With dead ends: 886 [2021-11-20 05:37:41,277 INFO L226 Difference]: Without dead ends: 885 [2021-11-20 05:37:41,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:37:41,278 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 52 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:41,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 119 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:37:41,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-11-20 05:37:41,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 812. [2021-11-20 05:37:41,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 602 states have (on average 1.1843853820598007) internal successors, (713), 633 states have internal predecessors, (713), 143 states have call successors, (143), 38 states have call predecessors, (143), 62 states have return successors, (220), 140 states have call predecessors, (220), 139 states have call successors, (220) [2021-11-20 05:37:41,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1076 transitions. [2021-11-20 05:37:41,345 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1076 transitions. Word has length 28 [2021-11-20 05:37:41,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:41,346 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1076 transitions. [2021-11-20 05:37:41,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:37:41,346 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1076 transitions. [2021-11-20 05:37:41,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 05:37:41,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:41,350 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:41,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:41,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:41,575 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:37:41,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:41,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1777813581, now seen corresponding path program 1 times [2021-11-20 05:37:41,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:41,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956148496] [2021-11-20 05:37:41,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:41,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:41,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:37:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:41,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:37:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:37:41,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:41,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956148496] [2021-11-20 05:37:41,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956148496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:41,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055620781] [2021-11-20 05:37:41,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:41,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:41,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:41,686 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:41,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:37:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:41,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 05:37:41,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:37:41,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:37:42,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055620781] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:42,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:37:42,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-11-20 05:37:42,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204639944] [2021-11-20 05:37:42,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:42,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 05:37:42,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:42,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 05:37:42,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:37:42,076 INFO L87 Difference]: Start difference. First operand 812 states and 1076 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 05:37:42,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:42,633 INFO L93 Difference]: Finished difference Result 1503 states and 2506 transitions. [2021-11-20 05:37:42,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 05:37:42,634 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-11-20 05:37:42,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:42,647 INFO L225 Difference]: With dead ends: 1503 [2021-11-20 05:37:42,647 INFO L226 Difference]: Without dead ends: 1501 [2021-11-20 05:37:42,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-11-20 05:37:42,650 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 146 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:42,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 172 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:37:42,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2021-11-20 05:37:42,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1258. [2021-11-20 05:37:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 902 states have (on average 1.1696230598669624) internal successors, (1055), 947 states have internal predecessors, (1055), 241 states have call successors, (241), 53 states have call predecessors, (241), 110 states have return successors, (548), 257 states have call predecessors, (548), 236 states have call successors, (548) [2021-11-20 05:37:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1844 transitions. [2021-11-20 05:37:42,777 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1844 transitions. Word has length 33 [2021-11-20 05:37:42,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:42,778 INFO L470 AbstractCegarLoop]: Abstraction has 1258 states and 1844 transitions. [2021-11-20 05:37:42,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 05:37:42,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1844 transitions. [2021-11-20 05:37:42,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 05:37:42,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:42,780 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:42,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:43,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:43,007 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:37:43,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:43,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1227703372, now seen corresponding path program 2 times [2021-11-20 05:37:43,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:43,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462693802] [2021-11-20 05:37:43,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:43,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:43,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:37:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 05:37:43,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:43,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462693802] [2021-11-20 05:37:43,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462693802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:43,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114540754] [2021-11-20 05:37:43,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:37:43,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:43,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:43,094 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:43,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:37:43,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:37:43,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:37:43,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 05:37:43,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 05:37:43,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 05:37:43,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114540754] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:43,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:37:43,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-11-20 05:37:43,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912143300] [2021-11-20 05:37:43,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:43,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 05:37:43,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:43,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 05:37:43,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:37:43,437 INFO L87 Difference]: Start difference. First operand 1258 states and 1844 transitions. Second operand has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:37:44,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:44,125 INFO L93 Difference]: Finished difference Result 2355 states and 3821 transitions. [2021-11-20 05:37:44,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 05:37:44,126 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2021-11-20 05:37:44,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:44,155 INFO L225 Difference]: With dead ends: 2355 [2021-11-20 05:37:44,155 INFO L226 Difference]: Without dead ends: 2338 [2021-11-20 05:37:44,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=1009, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 05:37:44,161 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 266 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:44,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 162 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:37:44,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2021-11-20 05:37:44,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 1753. [2021-11-20 05:37:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1280 states have (on average 1.16484375) internal successors, (1491), 1338 states have internal predecessors, (1491), 308 states have call successors, (308), 82 states have call predecessors, (308), 160 states have return successors, (829), 332 states have call predecessors, (829), 300 states have call successors, (829) [2021-11-20 05:37:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2628 transitions. [2021-11-20 05:37:44,330 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2628 transitions. Word has length 36 [2021-11-20 05:37:44,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:44,330 INFO L470 AbstractCegarLoop]: Abstraction has 1753 states and 2628 transitions. [2021-11-20 05:37:44,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:37:44,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2628 transitions. [2021-11-20 05:37:44,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 05:37:44,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:44,333 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:44,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:44,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 05:37:44,553 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:37:44,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:44,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1699542727, now seen corresponding path program 1 times [2021-11-20 05:37:44,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:44,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585695608] [2021-11-20 05:37:44,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:44,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:44,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:37:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:44,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:37:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:37:44,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:44,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585695608] [2021-11-20 05:37:44,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585695608] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:44,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483176485] [2021-11-20 05:37:44,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:44,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:44,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:44,658 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:44,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:37:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:44,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 05:37:44,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:37:44,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:37:45,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483176485] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:45,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:37:45,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2021-11-20 05:37:45,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587627345] [2021-11-20 05:37:45,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:37:45,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:37:45,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:45,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:37:45,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:37:45,034 INFO L87 Difference]: Start difference. First operand 1753 states and 2628 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 05:37:45,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:45,326 INFO L93 Difference]: Finished difference Result 1910 states and 3114 transitions. [2021-11-20 05:37:45,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:37:45,327 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2021-11-20 05:37:45,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:45,344 INFO L225 Difference]: With dead ends: 1910 [2021-11-20 05:37:45,344 INFO L226 Difference]: Without dead ends: 1909 [2021-11-20 05:37:45,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-11-20 05:37:45,347 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:45,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 158 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:37:45,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2021-11-20 05:37:45,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1734. [2021-11-20 05:37:45,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1271 states have (on average 1.163650668764752) internal successors, (1479), 1329 states have internal predecessors, (1479), 305 states have call successors, (305), 82 states have call predecessors, (305), 153 states have return successors, (696), 322 states have call predecessors, (696), 297 states have call successors, (696) [2021-11-20 05:37:45,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2480 transitions. [2021-11-20 05:37:45,497 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2480 transitions. Word has length 37 [2021-11-20 05:37:45,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:45,498 INFO L470 AbstractCegarLoop]: Abstraction has 1734 states and 2480 transitions. [2021-11-20 05:37:45,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 05:37:45,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2480 transitions. [2021-11-20 05:37:45,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 05:37:45,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:45,500 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:45,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:45,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 05:37:45,715 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:37:45,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:45,715 INFO L85 PathProgramCache]: Analyzing trace with hash 865218898, now seen corresponding path program 1 times [2021-11-20 05:37:45,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:45,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602428008] [2021-11-20 05:37:45,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:45,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:45,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:37:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:45,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:37:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:45,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 05:37:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:37:45,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:45,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602428008] [2021-11-20 05:37:45,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602428008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:45,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643418919] [2021-11-20 05:37:45,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:45,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:45,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:45,794 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:45,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 05:37:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:45,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:37:45,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 05:37:45,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 05:37:46,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643418919] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:46,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:37:46,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2021-11-20 05:37:46,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603385530] [2021-11-20 05:37:46,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:46,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 05:37:46,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:46,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 05:37:46,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:37:46,131 INFO L87 Difference]: Start difference. First operand 1734 states and 2480 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 05:37:46,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:46,311 INFO L93 Difference]: Finished difference Result 2467 states and 3685 transitions. [2021-11-20 05:37:46,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:37:46,311 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 43 [2021-11-20 05:37:46,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:46,319 INFO L225 Difference]: With dead ends: 2467 [2021-11-20 05:37:46,319 INFO L226 Difference]: Without dead ends: 869 [2021-11-20 05:37:46,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:37:46,332 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 53 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:46,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 107 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:37:46,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-11-20 05:37:46,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 850. [2021-11-20 05:37:46,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 633 states have (on average 1.1342812006319116) internal successors, (718), 653 states have internal predecessors, (718), 153 states have call successors, (153), 46 states have call predecessors, (153), 60 states have return successors, (244), 150 states have call predecessors, (244), 149 states have call successors, (244) [2021-11-20 05:37:46,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1115 transitions. [2021-11-20 05:37:46,410 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1115 transitions. Word has length 43 [2021-11-20 05:37:46,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:46,411 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 1115 transitions. [2021-11-20 05:37:46,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 05:37:46,411 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1115 transitions. [2021-11-20 05:37:46,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 05:37:46,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:46,413 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:46,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:46,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 05:37:46,627 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:37:46,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:46,627 INFO L85 PathProgramCache]: Analyzing trace with hash -151680771, now seen corresponding path program 2 times [2021-11-20 05:37:46,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:46,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333371345] [2021-11-20 05:37:46,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:46,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:37:46,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:46,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333371345] [2021-11-20 05:37:46,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333371345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:46,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886100961] [2021-11-20 05:37:46,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:37:46,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:46,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:46,734 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:46,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 05:37:46,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:37:46,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:37:46,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 05:37:46,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:46,885 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:37:46,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:37:47,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886100961] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:47,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:37:47,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-20 05:37:47,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463160466] [2021-11-20 05:37:47,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:47,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 05:37:47,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:47,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 05:37:47,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-11-20 05:37:47,093 INFO L87 Difference]: Start difference. First operand 850 states and 1115 transitions. Second operand has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:47,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:47,671 INFO L93 Difference]: Finished difference Result 1623 states and 2347 transitions. [2021-11-20 05:37:47,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 05:37:47,672 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-20 05:37:47,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:47,684 INFO L225 Difference]: With dead ends: 1623 [2021-11-20 05:37:47,684 INFO L226 Difference]: Without dead ends: 1622 [2021-11-20 05:37:47,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 05:37:47,686 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 419 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:47,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 379 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:37:47,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-11-20 05:37:47,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1510. [2021-11-20 05:37:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1125 states have (on average 1.1075555555555556) internal successors, (1246), 1157 states have internal predecessors, (1246), 273 states have call successors, (273), 82 states have call predecessors, (273), 108 states have return successors, (436), 270 states have call predecessors, (436), 269 states have call successors, (436) [2021-11-20 05:37:47,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 1955 transitions. [2021-11-20 05:37:47,791 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 1955 transitions. Word has length 44 [2021-11-20 05:37:47,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:47,792 INFO L470 AbstractCegarLoop]: Abstraction has 1510 states and 1955 transitions. [2021-11-20 05:37:47,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:47,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 1955 transitions. [2021-11-20 05:37:47,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 05:37:47,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:47,795 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:47,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:48,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 05:37:48,011 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:37:48,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:48,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1560392739, now seen corresponding path program 2 times [2021-11-20 05:37:48,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:48,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654129059] [2021-11-20 05:37:48,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:48,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:48,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:37:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:48,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:37:48,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:37:48,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:48,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654129059] [2021-11-20 05:37:48,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654129059] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:48,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505816040] [2021-11-20 05:37:48,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:37:48,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:48,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:48,108 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:48,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 05:37:48,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:37:48,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:37:48,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:37:48,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:48,267 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:37:48,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:37:48,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505816040] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:48,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:37:48,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2021-11-20 05:37:48,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297868453] [2021-11-20 05:37:48,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:48,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 05:37:48,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:48,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 05:37:48,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-20 05:37:48,555 INFO L87 Difference]: Start difference. First operand 1510 states and 1955 transitions. Second operand has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 05:37:49,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:49,670 INFO L93 Difference]: Finished difference Result 3056 states and 4731 transitions. [2021-11-20 05:37:49,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 05:37:49,671 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 45 [2021-11-20 05:37:49,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:49,689 INFO L225 Difference]: With dead ends: 3056 [2021-11-20 05:37:49,689 INFO L226 Difference]: Without dead ends: 2163 [2021-11-20 05:37:49,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=508, Invalid=1748, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 05:37:49,700 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 204 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:49,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 298 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:37:49,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-11-20 05:37:49,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1621. [2021-11-20 05:37:49,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1208 states have (on average 1.1018211920529801) internal successors, (1331), 1240 states have internal predecessors, (1331), 292 states have call successors, (292), 91 states have call predecessors, (292), 117 states have return successors, (461), 289 states have call predecessors, (461), 288 states have call successors, (461) [2021-11-20 05:37:49,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2084 transitions. [2021-11-20 05:37:49,865 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2084 transitions. Word has length 45 [2021-11-20 05:37:49,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:49,866 INFO L470 AbstractCegarLoop]: Abstraction has 1621 states and 2084 transitions. [2021-11-20 05:37:49,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 05:37:49,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2084 transitions. [2021-11-20 05:37:49,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 05:37:49,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:49,868 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:49,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:50,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:50,091 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:37:50,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:50,091 INFO L85 PathProgramCache]: Analyzing trace with hash 442862615, now seen corresponding path program 1 times [2021-11-20 05:37:50,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:50,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997151365] [2021-11-20 05:37:50,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:50,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:50,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:37:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:50,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:37:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:50,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:37:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:50,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 05:37:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 05:37:50,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:50,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997151365] [2021-11-20 05:37:50,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997151365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:50,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936170602] [2021-11-20 05:37:50,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:50,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:50,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:50,226 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:50,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 05:37:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:50,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 05:37:50,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 05:37:50,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 05:37:50,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936170602] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:50,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:37:50,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2021-11-20 05:37:50,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525197794] [2021-11-20 05:37:50,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:50,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 05:37:50,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:50,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 05:37:50,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-11-20 05:37:50,913 INFO L87 Difference]: Start difference. First operand 1621 states and 2084 transitions. Second operand has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 05:37:52,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:52,518 INFO L93 Difference]: Finished difference Result 4064 states and 7465 transitions. [2021-11-20 05:37:52,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-20 05:37:52,519 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 52 [2021-11-20 05:37:52,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:52,567 INFO L225 Difference]: With dead ends: 4064 [2021-11-20 05:37:52,568 INFO L226 Difference]: Without dead ends: 4060 [2021-11-20 05:37:52,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1682 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1158, Invalid=5004, Unknown=0, NotChecked=0, Total=6162 [2021-11-20 05:37:52,574 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 145 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:52,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 246 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 05:37:52,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4060 states. [2021-11-20 05:37:52,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4060 to 2916. [2021-11-20 05:37:52,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2015 states have (on average 1.078908188585608) internal successors, (2174), 2047 states have internal predecessors, (2174), 557 states have call successors, (557), 105 states have call predecessors, (557), 340 states have return successors, (3218), 763 states have call predecessors, (3218), 551 states have call successors, (3218) [2021-11-20 05:37:52,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 5949 transitions. [2021-11-20 05:37:52,910 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 5949 transitions. Word has length 52 [2021-11-20 05:37:52,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:52,911 INFO L470 AbstractCegarLoop]: Abstraction has 2916 states and 5949 transitions. [2021-11-20 05:37:52,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 05:37:52,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 5949 transitions. [2021-11-20 05:37:52,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 05:37:52,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:52,914 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:52,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:53,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 05:37:53,143 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:37:53,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:53,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1991697283, now seen corresponding path program 1 times [2021-11-20 05:37:53,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:53,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153446579] [2021-11-20 05:37:53,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:53,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:37:53,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:53,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153446579] [2021-11-20 05:37:53,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153446579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:53,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203968560] [2021-11-20 05:37:53,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:53,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:53,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:53,285 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:53,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 05:37:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:53,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 05:37:53,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:37:53,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:37:53,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203968560] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:53,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:37:53,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-20 05:37:53,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815360706] [2021-11-20 05:37:53,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:53,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 05:37:53,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:53,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 05:37:53,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-11-20 05:37:53,792 INFO L87 Difference]: Start difference. First operand 2916 states and 5949 transitions. Second operand has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:54,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:54,776 INFO L93 Difference]: Finished difference Result 7961 states and 16550 transitions. [2021-11-20 05:37:54,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 05:37:54,777 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-20 05:37:54,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:54,869 INFO L225 Difference]: With dead ends: 7961 [2021-11-20 05:37:54,870 INFO L226 Difference]: Without dead ends: 7960 [2021-11-20 05:37:54,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 05:37:54,876 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 891 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:54,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 323 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:37:54,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7960 states. [2021-11-20 05:37:55,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7960 to 7884. [2021-11-20 05:37:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7884 states, 5489 states have (on average 1.0814355984696666) internal successors, (5936), 5593 states have internal predecessors, (5936), 1505 states have call successors, (1505), 303 states have call predecessors, (1505), 886 states have return successors, (8678), 1987 states have call predecessors, (8678), 1499 states have call successors, (8678) [2021-11-20 05:37:55,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7884 states to 7884 states and 16119 transitions. [2021-11-20 05:37:55,725 INFO L78 Accepts]: Start accepts. Automaton has 7884 states and 16119 transitions. Word has length 58 [2021-11-20 05:37:55,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:55,726 INFO L470 AbstractCegarLoop]: Abstraction has 7884 states and 16119 transitions. [2021-11-20 05:37:55,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:55,727 INFO L276 IsEmpty]: Start isEmpty. Operand 7884 states and 16119 transitions. [2021-11-20 05:37:55,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 05:37:55,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:55,730 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:55,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:55,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:55,951 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:37:55,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:55,951 INFO L85 PathProgramCache]: Analyzing trace with hash 526800899, now seen corresponding path program 1 times [2021-11-20 05:37:55,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:55,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003249047] [2021-11-20 05:37:55,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:55,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:55,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:37:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:56,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:37:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:56,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:37:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:56,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 05:37:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:56,097 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 05:37:56,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:56,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003249047] [2021-11-20 05:37:56,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003249047] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:56,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102821576] [2021-11-20 05:37:56,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:56,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:56,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:56,103 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:56,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 05:37:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:56,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 05:37:56,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 05:37:56,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 05:37:56,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102821576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:56,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:37:56,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2021-11-20 05:37:56,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974168497] [2021-11-20 05:37:56,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:56,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 05:37:56,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:56,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 05:37:56,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-11-20 05:37:56,784 INFO L87 Difference]: Start difference. First operand 7884 states and 16119 transitions. Second operand has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 05:37:59,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:59,823 INFO L93 Difference]: Finished difference Result 29449 states and 111079 transitions. [2021-11-20 05:37:59,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-20 05:37:59,823 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2021-11-20 05:37:59,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:00,303 INFO L225 Difference]: With dead ends: 29449 [2021-11-20 05:38:00,303 INFO L226 Difference]: Without dead ends: 22920 [2021-11-20 05:38:00,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1251, Invalid=4755, Unknown=0, NotChecked=0, Total=6006 [2021-11-20 05:38:00,488 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 106 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:00,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 297 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 05:38:00,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22920 states. [2021-11-20 05:38:03,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22920 to 16604. [2021-11-20 05:38:03,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16604 states, 10900 states have (on average 1.0543119266055045) internal successors, (11492), 10965 states have internal predecessors, (11492), 3293 states have call successors, (3293), 380 states have call predecessors, (3293), 2407 states have return successors, (45164), 5258 states have call predecessors, (45164), 3282 states have call successors, (45164) [2021-11-20 05:38:03,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16604 states to 16604 states and 59949 transitions. [2021-11-20 05:38:03,864 INFO L78 Accepts]: Start accepts. Automaton has 16604 states and 59949 transitions. Word has length 56 [2021-11-20 05:38:03,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:03,865 INFO L470 AbstractCegarLoop]: Abstraction has 16604 states and 59949 transitions. [2021-11-20 05:38:03,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 05:38:03,865 INFO L276 IsEmpty]: Start isEmpty. Operand 16604 states and 59949 transitions. [2021-11-20 05:38:03,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-20 05:38:03,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:03,869 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:03,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:04,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:04,083 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:38:04,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:04,083 INFO L85 PathProgramCache]: Analyzing trace with hash 55857866, now seen corresponding path program 2 times [2021-11-20 05:38:04,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:04,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024708618] [2021-11-20 05:38:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:04,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:04,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:38:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:04,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:38:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:04,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:38:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:04,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:38:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:04,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 05:38:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 05:38:04,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:04,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024708618] [2021-11-20 05:38:04,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024708618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:38:04,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795305279] [2021-11-20 05:38:04,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:38:04,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:04,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:38:04,288 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:38:04,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 05:38:04,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:38:04,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:38:04,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 05:38:04,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 23 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-20 05:38:04,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 80 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 05:38:05,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795305279] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:38:05,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:38:05,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2021-11-20 05:38:05,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371214075] [2021-11-20 05:38:05,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:38:05,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 05:38:05,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:05,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 05:38:05,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 05:38:05,893 INFO L87 Difference]: Start difference. First operand 16604 states and 59949 transitions. Second operand has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 05:38:07,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:07,696 INFO L93 Difference]: Finished difference Result 25458 states and 94365 transitions. [2021-11-20 05:38:07,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 05:38:07,696 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 73 [2021-11-20 05:38:07,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:07,767 INFO L225 Difference]: With dead ends: 25458 [2021-11-20 05:38:07,767 INFO L226 Difference]: Without dead ends: 10209 [2021-11-20 05:38:08,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=673, Invalid=2633, Unknown=0, NotChecked=0, Total=3306 [2021-11-20 05:38:08,054 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 182 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:08,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 283 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:38:08,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10209 states. [2021-11-20 05:38:08,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10209 to 9706. [2021-11-20 05:38:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9706 states, 6743 states have (on average 1.0793415393741659) internal successors, (7278), 6950 states have internal predecessors, (7278), 1900 states have call successors, (1900), 404 states have call predecessors, (1900), 1059 states have return successors, (6461), 2351 states have call predecessors, (6461), 1892 states have call successors, (6461) [2021-11-20 05:38:08,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9706 states to 9706 states and 15639 transitions. [2021-11-20 05:38:08,860 INFO L78 Accepts]: Start accepts. Automaton has 9706 states and 15639 transitions. Word has length 73 [2021-11-20 05:38:08,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:08,861 INFO L470 AbstractCegarLoop]: Abstraction has 9706 states and 15639 transitions. [2021-11-20 05:38:08,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 05:38:08,861 INFO L276 IsEmpty]: Start isEmpty. Operand 9706 states and 15639 transitions. [2021-11-20 05:38:08,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 05:38:08,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:08,873 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:08,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:09,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:09,087 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:38:09,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:09,087 INFO L85 PathProgramCache]: Analyzing trace with hash -131434271, now seen corresponding path program 3 times [2021-11-20 05:38:09,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:09,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338843507] [2021-11-20 05:38:09,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:09,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:09,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:38:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:09,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:38:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:38:09,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:09,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338843507] [2021-11-20 05:38:09,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338843507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:38:09,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267562216] [2021-11-20 05:38:09,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:38:09,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:09,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:38:09,257 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:38:09,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 05:38:09,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-20 05:38:09,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:38:09,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 05:38:09,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:38:09,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 65 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:38:09,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267562216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:38:09,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:38:09,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2021-11-20 05:38:09,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245689199] [2021-11-20 05:38:09,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:38:09,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 05:38:09,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:09,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 05:38:09,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 05:38:09,967 INFO L87 Difference]: Start difference. First operand 9706 states and 15639 transitions. Second operand has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 05:38:10,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:10,992 INFO L93 Difference]: Finished difference Result 10357 states and 16637 transitions. [2021-11-20 05:38:10,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 05:38:10,994 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2021-11-20 05:38:10,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:11,048 INFO L225 Difference]: With dead ends: 10357 [2021-11-20 05:38:11,048 INFO L226 Difference]: Without dead ends: 10356 [2021-11-20 05:38:11,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=577, Invalid=1973, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 05:38:11,056 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 203 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:11,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 249 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:38:11,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10356 states. [2021-11-20 05:38:11,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10356 to 9814. [2021-11-20 05:38:11,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9814 states, 6815 states have (on average 1.074688187820983) internal successors, (7324), 7022 states have internal predecessors, (7324), 1900 states have call successors, (1900), 404 states have call predecessors, (1900), 1095 states have return successors, (6555), 2387 states have call predecessors, (6555), 1892 states have call successors, (6555) [2021-11-20 05:38:12,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9814 states to 9814 states and 15779 transitions. [2021-11-20 05:38:12,044 INFO L78 Accepts]: Start accepts. Automaton has 9814 states and 15779 transitions. Word has length 69 [2021-11-20 05:38:12,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:12,045 INFO L470 AbstractCegarLoop]: Abstraction has 9814 states and 15779 transitions. [2021-11-20 05:38:12,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 05:38:12,045 INFO L276 IsEmpty]: Start isEmpty. Operand 9814 states and 15779 transitions. [2021-11-20 05:38:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-20 05:38:12,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:12,057 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:12,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:12,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 05:38:12,271 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:38:12,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:12,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1324062136, now seen corresponding path program 2 times [2021-11-20 05:38:12,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:12,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531702988] [2021-11-20 05:38:12,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:12,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:12,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:38:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:12,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:38:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:12,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:38:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:12,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:38:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:12,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:38:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:12,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 05:38:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:12,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 05:38:12,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 82 proven. 24 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-20 05:38:12,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:12,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531702988] [2021-11-20 05:38:12,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531702988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:38:12,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490531134] [2021-11-20 05:38:12,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:38:12,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:12,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:38:12,406 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:38:12,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 05:38:12,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:38:12,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:38:12,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:38:12,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 82 proven. 15 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 05:38:12,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:13,058 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 82 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-20 05:38:13,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490531134] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:38:13,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:38:13,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2021-11-20 05:38:13,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522804748] [2021-11-20 05:38:13,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:38:13,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 05:38:13,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:13,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 05:38:13,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:38:13,060 INFO L87 Difference]: Start difference. First operand 9814 states and 15779 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-20 05:38:13,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:13,663 INFO L93 Difference]: Finished difference Result 18932 states and 34355 transitions. [2021-11-20 05:38:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:38:13,664 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) Word has length 80 [2021-11-20 05:38:13,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:13,729 INFO L225 Difference]: With dead ends: 18932 [2021-11-20 05:38:13,729 INFO L226 Difference]: Without dead ends: 10758 [2021-11-20 05:38:13,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:38:13,781 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 61 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:13,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 81 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:38:13,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10758 states. [2021-11-20 05:38:14,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10758 to 9808. [2021-11-20 05:38:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9808 states, 6812 states have (on average 1.0747210804462712) internal successors, (7321), 7019 states have internal predecessors, (7321), 1897 states have call successors, (1897), 404 states have call predecessors, (1897), 1095 states have return successors, (6475), 2384 states have call predecessors, (6475), 1862 states have call successors, (6475) [2021-11-20 05:38:14,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9808 states to 9808 states and 15693 transitions. [2021-11-20 05:38:14,482 INFO L78 Accepts]: Start accepts. Automaton has 9808 states and 15693 transitions. Word has length 80 [2021-11-20 05:38:14,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:14,483 INFO L470 AbstractCegarLoop]: Abstraction has 9808 states and 15693 transitions. [2021-11-20 05:38:14,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-20 05:38:14,483 INFO L276 IsEmpty]: Start isEmpty. Operand 9808 states and 15693 transitions. [2021-11-20 05:38:14,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 05:38:14,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:14,490 INFO L514 BasicCegarLoop]: trace histogram [11, 9, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:14,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:14,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:14,718 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:38:14,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:14,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1897499616, now seen corresponding path program 3 times [2021-11-20 05:38:14,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:14,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430023626] [2021-11-20 05:38:14,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:14,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:14,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:38:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:14,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:38:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:14,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:38:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:14,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:38:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:14,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:38:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:14,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:38:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:14,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 05:38:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:14,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 05:38:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:14,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 05:38:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 113 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-20 05:38:14,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:14,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430023626] [2021-11-20 05:38:14,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430023626] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:38:14,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545657255] [2021-11-20 05:38:14,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:38:14,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:14,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:38:14,910 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:38:14,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 05:38:15,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 05:38:15,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:38:15,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 05:38:15,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 150 proven. 26 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 05:38:15,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 119 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 05:38:16,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545657255] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:38:16,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:38:16,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2021-11-20 05:38:16,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970286316] [2021-11-20 05:38:16,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:38:16,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 05:38:16,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:16,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 05:38:16,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:38:16,063 INFO L87 Difference]: Start difference. First operand 9808 states and 15693 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2021-11-20 05:38:17,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:17,099 INFO L93 Difference]: Finished difference Result 20497 states and 41620 transitions. [2021-11-20 05:38:17,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:38:17,100 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) Word has length 99 [2021-11-20 05:38:17,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:17,179 INFO L225 Difference]: With dead ends: 20497 [2021-11-20 05:38:17,179 INFO L226 Difference]: Without dead ends: 12358 [2021-11-20 05:38:17,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:38:17,235 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 109 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:17,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 135 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:38:17,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12358 states. [2021-11-20 05:38:18,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12358 to 11997. [2021-11-20 05:38:18,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11997 states, 8101 states have (on average 1.054684606838662) internal successors, (8544), 8288 states have internal predecessors, (8544), 2417 states have call successors, (2417), 424 states have call predecessors, (2417), 1475 states have return successors, (8115), 3284 states have call predecessors, (8115), 2362 states have call successors, (8115) [2021-11-20 05:38:18,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11997 states to 11997 states and 19076 transitions. [2021-11-20 05:38:18,113 INFO L78 Accepts]: Start accepts. Automaton has 11997 states and 19076 transitions. Word has length 99 [2021-11-20 05:38:18,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:18,114 INFO L470 AbstractCegarLoop]: Abstraction has 11997 states and 19076 transitions. [2021-11-20 05:38:18,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2021-11-20 05:38:18,114 INFO L276 IsEmpty]: Start isEmpty. Operand 11997 states and 19076 transitions. [2021-11-20 05:38:18,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-20 05:38:18,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:18,123 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 7, 7, 7, 7, 6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:18,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-20 05:38:18,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:18,350 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:38:18,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:18,351 INFO L85 PathProgramCache]: Analyzing trace with hash -127918165, now seen corresponding path program 3 times [2021-11-20 05:38:18,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:18,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623913128] [2021-11-20 05:38:18,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:18,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:18,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:38:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:18,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:38:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:18,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:38:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:18,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 05:38:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:18,599 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 122 proven. 90 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 05:38:18,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:18,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623913128] [2021-11-20 05:38:18,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623913128] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:38:18,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520586834] [2021-11-20 05:38:18,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:38:18,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:18,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:38:18,601 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:38:18,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 05:38:18,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-20 05:38:18,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:38:18,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-20 05:38:18,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 119 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-20 05:38:18,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-20 05:38:19,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520586834] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:38:19,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:38:19,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2021-11-20 05:38:19,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056158491] [2021-11-20 05:38:19,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:38:19,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 05:38:19,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:19,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 05:38:19,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-11-20 05:38:19,189 INFO L87 Difference]: Start difference. First operand 11997 states and 19076 transitions. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 05:38:21,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:21,109 INFO L93 Difference]: Finished difference Result 20852 states and 35642 transitions. [2021-11-20 05:38:21,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-20 05:38:21,110 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 88 [2021-11-20 05:38:21,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:21,161 INFO L225 Difference]: With dead ends: 20852 [2021-11-20 05:38:21,162 INFO L226 Difference]: Without dead ends: 10359 [2021-11-20 05:38:21,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=989, Invalid=3433, Unknown=0, NotChecked=0, Total=4422 [2021-11-20 05:38:21,241 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 185 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:21,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 175 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 05:38:21,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10359 states. [2021-11-20 05:38:22,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10359 to 8741. [2021-11-20 05:38:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8741 states, 5968 states have (on average 1.0464142091152815) internal successors, (6245), 6144 states have internal predecessors, (6245), 1711 states have call successors, (1711), 352 states have call predecessors, (1711), 1058 states have return successors, (4097), 2244 states have call predecessors, (4097), 1677 states have call successors, (4097) [2021-11-20 05:38:22,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8741 states to 8741 states and 12053 transitions. [2021-11-20 05:38:22,124 INFO L78 Accepts]: Start accepts. Automaton has 8741 states and 12053 transitions. Word has length 88 [2021-11-20 05:38:22,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:22,125 INFO L470 AbstractCegarLoop]: Abstraction has 8741 states and 12053 transitions. [2021-11-20 05:38:22,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 05:38:22,125 INFO L276 IsEmpty]: Start isEmpty. Operand 8741 states and 12053 transitions. [2021-11-20 05:38:22,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 05:38:22,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:22,130 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:22,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:22,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 05:38:22,347 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:38:22,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:22,347 INFO L85 PathProgramCache]: Analyzing trace with hash -635779733, now seen corresponding path program 4 times [2021-11-20 05:38:22,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:22,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860263693] [2021-11-20 05:38:22,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:22,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:22,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:38:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:22,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:38:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:22,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:38:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:22,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:38:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:22,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:38:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:22,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 05:38:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:22,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 05:38:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:22,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 05:38:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 51 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-20 05:38:22,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:22,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860263693] [2021-11-20 05:38:22,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860263693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:38:22,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830323451] [2021-11-20 05:38:22,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:38:22,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:22,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:38:22,587 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:38:22,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 05:38:22,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:38:22,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:38:22,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 05:38:22,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 67 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-20 05:38:22,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 42 proven. 89 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 05:38:24,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830323451] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:38:24,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:38:24,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2021-11-20 05:38:24,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048930400] [2021-11-20 05:38:24,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:38:24,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-20 05:38:24,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:24,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-20 05:38:24,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 05:38:24,433 INFO L87 Difference]: Start difference. First operand 8741 states and 12053 transitions. Second operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2021-11-20 05:38:29,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:29,159 INFO L93 Difference]: Finished difference Result 29169 states and 46148 transitions. [2021-11-20 05:38:29,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-11-20 05:38:29,159 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) Word has length 90 [2021-11-20 05:38:29,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:29,315 INFO L225 Difference]: With dead ends: 29169 [2021-11-20 05:38:29,315 INFO L226 Difference]: Without dead ends: 28067 [2021-11-20 05:38:29,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12195 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5458, Invalid=27122, Unknown=0, NotChecked=0, Total=32580 [2021-11-20 05:38:29,348 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 231 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 2526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:29,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 372 Invalid, 2526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [975 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 05:38:29,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28067 states. [2021-11-20 05:38:30,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28067 to 17311. [2021-11-20 05:38:30,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17311 states, 11232 states have (on average 1.0269764957264957) internal successors, (11535), 11391 states have internal predecessors, (11535), 3626 states have call successors, (3626), 460 states have call predecessors, (3626), 2449 states have return successors, (11770), 5459 states have call predecessors, (11770), 3572 states have call successors, (11770) [2021-11-20 05:38:30,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17311 states to 17311 states and 26931 transitions. [2021-11-20 05:38:30,775 INFO L78 Accepts]: Start accepts. Automaton has 17311 states and 26931 transitions. Word has length 90 [2021-11-20 05:38:30,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:30,776 INFO L470 AbstractCegarLoop]: Abstraction has 17311 states and 26931 transitions. [2021-11-20 05:38:30,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2021-11-20 05:38:30,776 INFO L276 IsEmpty]: Start isEmpty. Operand 17311 states and 26931 transitions. [2021-11-20 05:38:30,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-20 05:38:30,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:30,781 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:30,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:31,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:31,007 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:38:31,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:31,007 INFO L85 PathProgramCache]: Analyzing trace with hash 147414137, now seen corresponding path program 3 times [2021-11-20 05:38:31,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:31,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214629475] [2021-11-20 05:38:31,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:31,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:31,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:31,276 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:31,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:31,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214629475] [2021-11-20 05:38:31,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214629475] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:38:31,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375515457] [2021-11-20 05:38:31,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:38:31,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:31,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:38:31,278 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:38:31,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 05:38:31,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-20 05:38:31,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:38:31,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 05:38:31,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:31,617 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:31,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:32,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375515457] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:38:32,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:38:32,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-11-20 05:38:32,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124833700] [2021-11-20 05:38:32,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:38:32,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-20 05:38:32,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:32,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-20 05:38:32,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 05:38:32,214 INFO L87 Difference]: Start difference. First operand 17311 states and 26931 transitions. Second operand has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:34,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:34,935 INFO L93 Difference]: Finished difference Result 28628 states and 44547 transitions. [2021-11-20 05:38:34,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-20 05:38:34,937 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-20 05:38:34,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:35,188 INFO L225 Difference]: With dead ends: 28628 [2021-11-20 05:38:35,188 INFO L226 Difference]: Without dead ends: 28627 [2021-11-20 05:38:35,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2021-11-20 05:38:35,198 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 988 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:35,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [992 Valid, 842 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 05:38:35,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28627 states. [2021-11-20 05:38:36,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28627 to 28627. [2021-11-20 05:38:36,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28627 states, 18540 states have (on average 1.0279935275080907) internal successors, (19059), 18915 states have internal predecessors, (19059), 5846 states have call successors, (5846), 676 states have call predecessors, (5846), 4237 states have return successors, (19630), 9035 states have call predecessors, (19630), 5792 states have call successors, (19630) [2021-11-20 05:38:37,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28627 states to 28627 states and 44535 transitions. [2021-11-20 05:38:37,045 INFO L78 Accepts]: Start accepts. Automaton has 28627 states and 44535 transitions. Word has length 92 [2021-11-20 05:38:37,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:37,046 INFO L470 AbstractCegarLoop]: Abstraction has 28627 states and 44535 transitions. [2021-11-20 05:38:37,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:37,046 INFO L276 IsEmpty]: Start isEmpty. Operand 28627 states and 44535 transitions. [2021-11-20 05:38:37,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-20 05:38:37,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:37,065 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:37,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:37,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 05:38:37,279 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:38:37,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:37,279 INFO L85 PathProgramCache]: Analyzing trace with hash -570444405, now seen corresponding path program 2 times [2021-11-20 05:38:37,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:37,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498658708] [2021-11-20 05:38:37,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:37,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 05:38:37,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:37,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498658708] [2021-11-20 05:38:37,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498658708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:38:37,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358063471] [2021-11-20 05:38:37,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:38:37,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:37,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:38:37,607 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:38:37,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 05:38:37,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:38:37,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:38:37,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-20 05:38:37,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 05:38:38,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 05:38:38,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358063471] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:38:38,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:38:38,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-11-20 05:38:38,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134580852] [2021-11-20 05:38:38,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:38:38,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-20 05:38:38,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:38,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-20 05:38:38,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 05:38:38,763 INFO L87 Difference]: Start difference. First operand 28627 states and 44535 transitions. Second operand has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:43,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:43,727 INFO L93 Difference]: Finished difference Result 64728 states and 101341 transitions. [2021-11-20 05:38:43,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-20 05:38:43,728 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-20 05:38:43,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:44,034 INFO L225 Difference]: With dead ends: 64728 [2021-11-20 05:38:44,034 INFO L226 Difference]: Without dead ends: 64727 [2021-11-20 05:38:44,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2021-11-20 05:38:44,062 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1758 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 712 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1761 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 712 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:44,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1761 Valid, 584 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [712 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 05:38:44,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64727 states. [2021-11-20 05:38:48,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64727 to 64675. [2021-11-20 05:38:48,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64675 states, 41976 states have (on average 1.028659233847913) internal successors, (43179), 42843 states have internal predecessors, (43179), 13190 states have call successors, (13190), 1564 states have call predecessors, (13190), 9505 states have return successors, (44950), 20267 states have call predecessors, (44950), 13076 states have call successors, (44950) [2021-11-20 05:38:48,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64675 states to 64675 states and 101319 transitions. [2021-11-20 05:38:48,967 INFO L78 Accepts]: Start accepts. Automaton has 64675 states and 101319 transitions. Word has length 142 [2021-11-20 05:38:48,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:48,968 INFO L470 AbstractCegarLoop]: Abstraction has 64675 states and 101319 transitions. [2021-11-20 05:38:48,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:48,968 INFO L276 IsEmpty]: Start isEmpty. Operand 64675 states and 101319 transitions. [2021-11-20 05:38:49,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-20 05:38:49,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:49,015 INFO L514 BasicCegarLoop]: trace histogram [25, 18, 17, 14, 14, 14, 13, 13, 13, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:49,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:49,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 05:38:49,238 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-20 05:38:49,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:49,239 INFO L85 PathProgramCache]: Analyzing trace with hash 135385807, now seen corresponding path program 1 times [2021-11-20 05:38:49,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:49,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903932061] [2021-11-20 05:38:49,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:49,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:49,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 05:38:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:49,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:38:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:49,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:38:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:49,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:38:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:49,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:38:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:49,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:38:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:49,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 05:38:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:49,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 05:38:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:49,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:38:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:49,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:38:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:49,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:38:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:49,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:38:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:49,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:38:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:49,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 05:38:49,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:49,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 05:38:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:49,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 05:38:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:49,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-20 05:38:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 597 proven. 214 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2021-11-20 05:38:49,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:49,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903932061] [2021-11-20 05:38:49,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903932061] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:38:49,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734413955] [2021-11-20 05:38:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:49,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:49,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:38:49,692 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:38:49,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29ff84fd-1117-4d9a-9a1f-0ba9185e715e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 05:38:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:49,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 05:38:49,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:50,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 585 proven. 216 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2021-11-20 05:38:50,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 601 proven. 263 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2021-11-20 05:38:52,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734413955] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:38:52,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:38:52,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 21] total 27 [2021-11-20 05:38:52,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603576625] [2021-11-20 05:38:52,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:38:52,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 05:38:52,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:52,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 05:38:52,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-11-20 05:38:52,663 INFO L87 Difference]: Start difference. First operand 64675 states and 101319 transitions. Second operand has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 24 states have internal predecessors, (122), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) [2021-11-20 05:38:59,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:59,139 INFO L93 Difference]: Finished difference Result 152847 states and 310280 transitions. [2021-11-20 05:38:59,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 05:38:59,140 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 24 states have internal predecessors, (122), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) Word has length 225 [2021-11-20 05:38:59,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:39:00,195 INFO L225 Difference]: With dead ends: 152847 [2021-11-20 05:39:00,195 INFO L226 Difference]: Without dead ends: 94875 [2021-11-20 05:39:00,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 480 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=423, Invalid=1557, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 05:39:00,567 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 142 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:39:00,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 267 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:39:00,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94875 states.