./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 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 16:41:42,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:41:42,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:41:42,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:41:42,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:41:42,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:41:42,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:41:42,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:41:42,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:41:42,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:41:42,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:41:42,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:41:42,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:41:42,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:41:42,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:41:42,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:41:42,880 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:41:42,881 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:41:42,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:41:42,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:41:42,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:41:42,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:41:42,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:41:42,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:41:42,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:41:42,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:41:42,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:41:42,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:41:42,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:41:42,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:41:42,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:41:42,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:41:42,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:41:42,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:41:42,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:41:42,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:41:42,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:41:42,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:41:42,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:41:42,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:41:42,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:41:42,909 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-25 16:41:42,940 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:41:42,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:41:42,941 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:41:42,941 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:41:42,942 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:41:42,943 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:41:42,943 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:41:42,944 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:41:42,944 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:41:42,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:41:42,945 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 16:41:42,945 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 16:41:42,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:41:42,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 16:41:42,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:41:42,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 16:41:42,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:41:42,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 16:41:42,947 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-25 16:41:42,947 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 16:41:42,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 16:41:42,947 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:41:42,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 16:41:42,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:41:42,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:41:42,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:41:42,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:41:42,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:41:42,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:41:42,949 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 16:41:42,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:41:42,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:41:42,950 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:41:42,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 16:41:42,951 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:41:42,951 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:41:42,951 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 [2022-11-25 16:41:43,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:41:43,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:41:43,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:41:43,254 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:41:43,254 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:41:43,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/recursive/Ackermann04.c [2022-11-25 16:41:46,308 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:41:46,508 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:41:46,508 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/sv-benchmarks/c/recursive/Ackermann04.c [2022-11-25 16:41:46,515 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/data/55298e8af/554c8b0374f840f2ae1dd7c78c1ca9aa/FLAG31ff0ae46 [2022-11-25 16:41:46,534 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/data/55298e8af/554c8b0374f840f2ae1dd7c78c1ca9aa [2022-11-25 16:41:46,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:41:46,545 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:41:46,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:41:46,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:41:46,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:41:46,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:41:46" (1/1) ... [2022-11-25 16:41:46,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40db1b52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:46, skipping insertion in model container [2022-11-25 16:41:46,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:41:46" (1/1) ... [2022-11-25 16:41:46,564 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:41:46,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:41:46,721 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2022-11-25 16:41:46,722 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:41:46,733 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:41:46,750 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2022-11-25 16:41:46,751 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:41:46,764 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:41:46,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:46 WrapperNode [2022-11-25 16:41:46,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:41:46,766 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:41:46,766 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:41:46,766 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:41:46,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:46" (1/1) ... [2022-11-25 16:41:46,780 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:46" (1/1) ... [2022-11-25 16:41:46,796 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2022-11-25 16:41:46,796 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:41:46,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:41:46,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:41:46,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:41:46,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:46" (1/1) ... [2022-11-25 16:41:46,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:46" (1/1) ... [2022-11-25 16:41:46,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:46" (1/1) ... [2022-11-25 16:41:46,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:46" (1/1) ... [2022-11-25 16:41:46,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:46" (1/1) ... [2022-11-25 16:41:46,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:46" (1/1) ... [2022-11-25 16:41:46,813 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:46" (1/1) ... [2022-11-25 16:41:46,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:46" (1/1) ... [2022-11-25 16:41:46,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:41:46,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:41:46,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:41:46,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:41:46,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:46" (1/1) ... [2022-11-25 16:41:46,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:41:46,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:46,856 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:41:46,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:41:46,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:41:46,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:41:46,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:41:46,938 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2022-11-25 16:41:46,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2022-11-25 16:41:46,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 16:41:47,024 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:41:47,029 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:41:47,251 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:41:47,258 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:41:47,267 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 16:41:47,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:41:47 BoogieIcfgContainer [2022-11-25 16:41:47,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:41:47,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:41:47,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:41:47,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:41:47,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:41:46" (1/3) ... [2022-11-25 16:41:47,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1381ea23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:41:47, skipping insertion in model container [2022-11-25 16:41:47,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:46" (2/3) ... [2022-11-25 16:41:47,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1381ea23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:41:47, skipping insertion in model container [2022-11-25 16:41:47,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:41:47" (3/3) ... [2022-11-25 16:41:47,289 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2022-11-25 16:41:47,308 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:41:47,309 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-25 16:41:47,361 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:41:47,368 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@32de65f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:41:47,369 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-25 16:41:47,373 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 16:41:47,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 16:41:47,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:47,382 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:47,382 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:41:47,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:47,388 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2022-11-25 16:41:47,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:47,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89641308] [2022-11-25 16:41:47,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:47,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:41:47,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:47,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89641308] [2022-11-25 16:41:47,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89641308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:41:47,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:41:47,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:41:47,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001948016] [2022-11-25 16:41:47,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:41:47,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:41:47,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:47,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:41:47,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:41:47,760 INFO L87 Difference]: Start difference. First operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:47,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:47,961 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2022-11-25 16:41:47,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:41:47,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 16:41:47,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:47,974 INFO L225 Difference]: With dead ends: 73 [2022-11-25 16:41:47,974 INFO L226 Difference]: Without dead ends: 60 [2022-11-25 16:41:47,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:41:47,991 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 61 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:47,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 107 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:41:48,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-25 16:41:48,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2022-11-25 16:41:48,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 42 states have internal predecessors, (53), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 16:41:48,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2022-11-25 16:41:48,045 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 8 [2022-11-25 16:41:48,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:48,045 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2022-11-25 16:41:48,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:48,046 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2022-11-25 16:41:48,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 16:41:48,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:48,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:48,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 16:41:48,047 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:41:48,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:48,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2022-11-25 16:41:48,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:48,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217945132] [2022-11-25 16:41:48,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:48,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:41:48,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:48,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217945132] [2022-11-25 16:41:48,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217945132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:41:48,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:41:48,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:41:48,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567281916] [2022-11-25 16:41:48,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:41:48,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:41:48,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:48,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:41:48,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:41:48,136 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:48,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:48,249 INFO L93 Difference]: Finished difference Result 101 states and 139 transitions. [2022-11-25 16:41:48,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:41:48,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 16:41:48,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:48,252 INFO L225 Difference]: With dead ends: 101 [2022-11-25 16:41:48,252 INFO L226 Difference]: Without dead ends: 95 [2022-11-25 16:41:48,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:41:48,254 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:48,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 89 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:41:48,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-25 16:41:48,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2022-11-25 16:41:48,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.540983606557377) internal successors, (94), 70 states have internal predecessors, (94), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-25 16:41:48,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2022-11-25 16:41:48,279 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 9 [2022-11-25 16:41:48,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:48,280 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2022-11-25 16:41:48,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:48,280 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2022-11-25 16:41:48,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 16:41:48,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:48,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:48,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 16:41:48,282 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:41:48,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:48,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2022-11-25 16:41:48,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:48,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158734857] [2022-11-25 16:41:48,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:48,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:41:48,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:48,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158734857] [2022-11-25 16:41:48,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158734857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:41:48,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:41:48,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:41:48,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750328558] [2022-11-25 16:41:48,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:41:48,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:41:48,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:48,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:41:48,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:41:48,435 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:48,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:48,546 INFO L93 Difference]: Finished difference Result 114 states and 154 transitions. [2022-11-25 16:41:48,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:41:48,554 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 16:41:48,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:48,557 INFO L225 Difference]: With dead ends: 114 [2022-11-25 16:41:48,557 INFO L226 Difference]: Without dead ends: 110 [2022-11-25 16:41:48,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:41:48,559 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 49 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:48,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 93 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:41:48,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-25 16:41:48,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2022-11-25 16:41:48,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.472972972972973) internal successors, (109), 83 states have internal predecessors, (109), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 16:41:48,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 138 transitions. [2022-11-25 16:41:48,600 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 138 transitions. Word has length 9 [2022-11-25 16:41:48,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:48,600 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 138 transitions. [2022-11-25 16:41:48,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:48,601 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 138 transitions. [2022-11-25 16:41:48,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 16:41:48,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:48,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:48,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 16:41:48,602 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:41:48,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:48,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2022-11-25 16:41:48,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:48,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248192760] [2022-11-25 16:41:48,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:48,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:41:48,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:48,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248192760] [2022-11-25 16:41:48,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248192760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:41:48,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:41:48,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:41:48,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86154014] [2022-11-25 16:41:48,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:41:48,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:41:48,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:48,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:41:48,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:41:48,718 INFO L87 Difference]: Start difference. First operand 102 states and 138 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:48,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:48,850 INFO L93 Difference]: Finished difference Result 102 states and 138 transitions. [2022-11-25 16:41:48,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:41:48,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 16:41:48,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:48,852 INFO L225 Difference]: With dead ends: 102 [2022-11-25 16:41:48,852 INFO L226 Difference]: Without dead ends: 100 [2022-11-25 16:41:48,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:41:48,855 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:48,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 45 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:41:48,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-25 16:41:48,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-11-25 16:41:48,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.337837837837838) internal successors, (99), 81 states have internal predecessors, (99), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 16:41:48,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2022-11-25 16:41:48,903 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 10 [2022-11-25 16:41:48,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:48,904 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2022-11-25 16:41:48,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:48,904 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2022-11-25 16:41:48,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 16:41:48,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:48,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:48,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 16:41:48,907 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:41:48,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:48,916 INFO L85 PathProgramCache]: Analyzing trace with hash -796703108, now seen corresponding path program 1 times [2022-11-25 16:41:48,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:48,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230078723] [2022-11-25 16:41:48,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:48,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:41:49,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:49,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230078723] [2022-11-25 16:41:49,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230078723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:41:49,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:41:49,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:41:49,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768373442] [2022-11-25 16:41:49,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:41:49,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:41:49,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:49,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:41:49,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:41:49,022 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:49,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:49,122 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2022-11-25 16:41:49,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:41:49,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 16:41:49,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:49,126 INFO L225 Difference]: With dead ends: 109 [2022-11-25 16:41:49,126 INFO L226 Difference]: Without dead ends: 108 [2022-11-25 16:41:49,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:41:49,136 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:49,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 92 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:41:49,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-25 16:41:49,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-11-25 16:41:49,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 81 states have internal predecessors, (97), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 16:41:49,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2022-11-25 16:41:49,168 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 11 [2022-11-25 16:41:49,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:49,169 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2022-11-25 16:41:49,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:49,170 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2022-11-25 16:41:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 16:41:49,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:49,172 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:49,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 16:41:49,177 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:41:49,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:49,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645175, now seen corresponding path program 1 times [2022-11-25 16:41:49,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:49,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358884415] [2022-11-25 16:41:49,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:49,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:41:49,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:49,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358884415] [2022-11-25 16:41:49,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358884415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:41:49,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:41:49,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:41:49,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529604185] [2022-11-25 16:41:49,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:41:49,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:41:49,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:49,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:41:49,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:41:49,260 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:49,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:49,329 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2022-11-25 16:41:49,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:41:49,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-25 16:41:49,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:49,331 INFO L225 Difference]: With dead ends: 168 [2022-11-25 16:41:49,331 INFO L226 Difference]: Without dead ends: 97 [2022-11-25 16:41:49,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:41:49,349 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:49,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 88 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:41:49,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-25 16:41:49,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-11-25 16:41:49,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.295774647887324) internal successors, (92), 78 states have internal predecessors, (92), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 16:41:49,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2022-11-25 16:41:49,380 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 15 [2022-11-25 16:41:49,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:49,381 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2022-11-25 16:41:49,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:49,382 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2022-11-25 16:41:49,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 16:41:49,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:49,383 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:49,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 16:41:49,384 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:41:49,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:49,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645399, now seen corresponding path program 1 times [2022-11-25 16:41:49,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:49,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562516982] [2022-11-25 16:41:49,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:49,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:41:49,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:49,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562516982] [2022-11-25 16:41:49,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562516982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:41:49,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131262639] [2022-11-25 16:41:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:49,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:49,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:49,475 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:41:49,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 16:41:49,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:49,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:41:49,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:41:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:41:49,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:41:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:41:49,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131262639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:41:49,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:41:49,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-25 16:41:49,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895823936] [2022-11-25 16:41:49,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:41:49,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:41:49,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:49,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:41:49,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:41:49,710 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:50,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:50,052 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2022-11-25 16:41:50,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 16:41:50,053 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-25 16:41:50,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:50,055 INFO L225 Difference]: With dead ends: 274 [2022-11-25 16:41:50,056 INFO L226 Difference]: Without dead ends: 272 [2022-11-25 16:41:50,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-11-25 16:41:50,057 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 249 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:50,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 163 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 16:41:50,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-25 16:41:50,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2022-11-25 16:41:50,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 182 states have (on average 1.2637362637362637) internal successors, (230), 189 states have internal predecessors, (230), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-25 16:41:50,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2022-11-25 16:41:50,093 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 15 [2022-11-25 16:41:50,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:50,094 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2022-11-25 16:41:50,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:50,094 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2022-11-25 16:41:50,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 16:41:50,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:50,095 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:50,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 16:41:50,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:50,313 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:41:50,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:50,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1422985811, now seen corresponding path program 1 times [2022-11-25 16:41:50,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:50,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558275053] [2022-11-25 16:41:50,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:50,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:41:50,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:50,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558275053] [2022-11-25 16:41:50,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558275053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:41:50,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341185140] [2022-11-25 16:41:50,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:50,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:50,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:50,466 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:41:50,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 16:41:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:50,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 16:41:50,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:41:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:41:50,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:41:50,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341185140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:41:50,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:41:50,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-11-25 16:41:50,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806840880] [2022-11-25 16:41:50,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:41:50,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:41:50,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:50,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:41:50,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:41:50,590 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:50,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:50,705 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2022-11-25 16:41:50,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:41:50,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-25 16:41:50,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:50,711 INFO L225 Difference]: With dead ends: 328 [2022-11-25 16:41:50,712 INFO L226 Difference]: Without dead ends: 327 [2022-11-25 16:41:50,712 INFO L412 NwaCegarLoop]: 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 [2022-11-25 16:41:50,713 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 41 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:50,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 96 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:41:50,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-11-25 16:41:50,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2022-11-25 16:41:50,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 227 states have (on average 1.2599118942731278) internal successors, (286), 234 states have internal predecessors, (286), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-11-25 16:41:50,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2022-11-25 16:41:50,767 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 16 [2022-11-25 16:41:50,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:50,767 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2022-11-25 16:41:50,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:50,768 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2022-11-25 16:41:50,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 16:41:50,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:50,769 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:50,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 16:41:50,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 16:41:50,975 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:41:50,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:50,976 INFO L85 PathProgramCache]: Analyzing trace with hash 848163410, now seen corresponding path program 1 times [2022-11-25 16:41:50,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:50,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740169765] [2022-11-25 16:41:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:50,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:41:51,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:51,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740169765] [2022-11-25 16:41:51,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740169765] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:41:51,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058016829] [2022-11-25 16:41:51,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:51,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:51,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:51,066 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:41:51,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 16:41:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:51,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:41:51,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:41:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:41:51,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:41:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:41:51,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058016829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:41:51,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:41:51,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-25 16:41:51,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302132846] [2022-11-25 16:41:51,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:41:51,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:41:51,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:51,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:41:51,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:41:51,250 INFO L87 Difference]: Start difference. First operand 293 states and 373 transitions. Second operand has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:51,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:51,540 INFO L93 Difference]: Finished difference Result 591 states and 792 transitions. [2022-11-25 16:41:51,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 16:41:51,541 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-25 16:41:51,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:51,544 INFO L225 Difference]: With dead ends: 591 [2022-11-25 16:41:51,544 INFO L226 Difference]: Without dead ends: 590 [2022-11-25 16:41:51,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-11-25 16:41:51,546 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 156 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:51,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 203 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 16:41:51,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-11-25 16:41:51,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 521. [2022-11-25 16:41:51,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 407 states have (on average 1.203931203931204) internal successors, (490), 414 states have internal predecessors, (490), 81 states have call successors, (81), 28 states have call predecessors, (81), 27 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-25 16:41:51,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2022-11-25 16:41:51,627 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 19 [2022-11-25 16:41:51,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:51,627 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2022-11-25 16:41:51,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:51,628 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2022-11-25 16:41:51,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 16:41:51,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:51,635 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:51,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 16:41:51,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:51,841 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:41:51,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:51,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2022-11-25 16:41:51,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:51,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067132441] [2022-11-25 16:41:51,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:51,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:51,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 16:41:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:41:52,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:52,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067132441] [2022-11-25 16:41:52,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067132441] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:41:52,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084394559] [2022-11-25 16:41:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:52,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:52,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:52,002 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:41:52,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 16:41:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:52,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 16:41:52,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:41:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:41:52,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:41:52,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084394559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:41:52,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:41:52,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2022-11-25 16:41:52,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732800936] [2022-11-25 16:41:52,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:41:52,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:41:52,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:52,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:41:52,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-25 16:41:52,103 INFO L87 Difference]: Start difference. First operand 521 states and 649 transitions. Second operand has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 16:41:52,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:52,247 INFO L93 Difference]: Finished difference Result 562 states and 696 transitions. [2022-11-25 16:41:52,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 16:41:52,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-11-25 16:41:52,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:52,251 INFO L225 Difference]: With dead ends: 562 [2022-11-25 16:41:52,251 INFO L226 Difference]: Without dead ends: 561 [2022-11-25 16:41:52,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-25 16:41:52,253 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 43 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:52,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 98 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:41:52,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-11-25 16:41:52,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 520. [2022-11-25 16:41:52,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 407 states have (on average 1.194103194103194) internal successors, (486), 413 states have internal predecessors, (486), 81 states have call successors, (81), 28 states have call predecessors, (81), 27 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-25 16:41:52,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 645 transitions. [2022-11-25 16:41:52,302 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 645 transitions. Word has length 24 [2022-11-25 16:41:52,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:52,302 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 645 transitions. [2022-11-25 16:41:52,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 16:41:52,303 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 645 transitions. [2022-11-25 16:41:52,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 16:41:52,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:52,304 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:52,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-25 16:41:52,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 16:41:52,509 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:41:52,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:52,510 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2022-11-25 16:41:52,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:52,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889573788] [2022-11-25 16:41:52,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:52,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:52,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 16:41:52,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:41:52,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:52,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889573788] [2022-11-25 16:41:52,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889573788] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:41:52,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136672999] [2022-11-25 16:41:52,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:52,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:52,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:52,661 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:41:52,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 16:41:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:52,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 16:41:52,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:41:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:41:52,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:41:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:41:52,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136672999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:41:52,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:41:52,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-25 16:41:53,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539373506] [2022-11-25 16:41:53,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:41:53,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 16:41:53,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:53,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 16:41:53,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-25 16:41:53,003 INFO L87 Difference]: Start difference. First operand 520 states and 645 transitions. Second operand has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 16:41:53,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:53,462 INFO L93 Difference]: Finished difference Result 869 states and 1249 transitions. [2022-11-25 16:41:53,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 16:41:53,463 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-11-25 16:41:53,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:53,470 INFO L225 Difference]: With dead ends: 869 [2022-11-25 16:41:53,470 INFO L226 Difference]: Without dead ends: 867 [2022-11-25 16:41:53,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2022-11-25 16:41:53,472 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 172 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:53,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 134 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 16:41:53,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-11-25 16:41:53,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 727. [2022-11-25 16:41:53,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 542 states have (on average 1.1863468634686347) internal successors, (643), 571 states have internal predecessors, (643), 123 states have call successors, (123), 35 states have call predecessors, (123), 57 states have return successors, (215), 120 states have call predecessors, (215), 119 states have call successors, (215) [2022-11-25 16:41:53,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 981 transitions. [2022-11-25 16:41:53,564 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 981 transitions. Word has length 25 [2022-11-25 16:41:53,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:53,564 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 981 transitions. [2022-11-25 16:41:53,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 16:41:53,564 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 981 transitions. [2022-11-25 16:41:53,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 16:41:53,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:53,566 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:53,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-25 16:41:53,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 16:41:53,771 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:41:53,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:53,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1298021223, now seen corresponding path program 1 times [2022-11-25 16:41:53,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:53,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307015591] [2022-11-25 16:41:53,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:53,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:53,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 16:41:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:41:53,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:53,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307015591] [2022-11-25 16:41:53,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307015591] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:41:53,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462708944] [2022-11-25 16:41:53,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:53,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:53,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:53,892 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:41:53,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 16:41:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:53,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 16:41:53,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:41:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:41:54,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:41:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:41:54,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462708944] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 16:41:54,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:41:54,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2022-11-25 16:41:54,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086702578] [2022-11-25 16:41:54,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:41:54,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 16:41:54,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:54,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 16:41:54,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-25 16:41:54,169 INFO L87 Difference]: Start difference. First operand 727 states and 981 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 16:41:54,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:54,456 INFO L93 Difference]: Finished difference Result 886 states and 1251 transitions. [2022-11-25 16:41:54,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 16:41:54,456 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-11-25 16:41:54,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:54,461 INFO L225 Difference]: With dead ends: 886 [2022-11-25 16:41:54,461 INFO L226 Difference]: Without dead ends: 885 [2022-11-25 16:41:54,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-11-25 16:41:54,462 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 51 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:54,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 109 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:41:54,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-11-25 16:41:54,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 812. [2022-11-25 16:41:54,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 602 states have (on average 1.1843853820598007) internal successors, (713), 633 states have internal predecessors, (713), 143 states have call successors, (143), 38 states have call predecessors, (143), 62 states have return successors, (220), 140 states have call predecessors, (220), 139 states have call successors, (220) [2022-11-25 16:41:54,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1076 transitions. [2022-11-25 16:41:54,549 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1076 transitions. Word has length 27 [2022-11-25 16:41:54,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:54,550 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1076 transitions. [2022-11-25 16:41:54,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 16:41:54,551 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1076 transitions. [2022-11-25 16:41:54,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 16:41:54,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:54,554 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:54,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-25 16:41:54,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:54,760 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:41:54,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:54,761 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2022-11-25 16:41:54,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:54,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020535193] [2022-11-25 16:41:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:54,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:54,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 16:41:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:54,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-25 16:41:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 16:41:54,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:54,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020535193] [2022-11-25 16:41:54,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020535193] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:41:54,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406853934] [2022-11-25 16:41:54,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:54,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:54,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:54,945 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:41:54,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 16:41:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:54,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 16:41:54,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:41:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 16:41:55,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:41:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 16:41:55,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406853934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:41:55,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:41:55,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-11-25 16:41:55,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904648868] [2022-11-25 16:41:55,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:41:55,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 16:41:55,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:55,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 16:41:55,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-25 16:41:55,291 INFO L87 Difference]: Start difference. First operand 812 states and 1076 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-25 16:41:55,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:55,992 INFO L93 Difference]: Finished difference Result 1503 states and 2506 transitions. [2022-11-25 16:41:55,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 16:41:55,992 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-11-25 16:41:55,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:56,003 INFO L225 Difference]: With dead ends: 1503 [2022-11-25 16:41:56,003 INFO L226 Difference]: Without dead ends: 1501 [2022-11-25 16:41:56,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2022-11-25 16:41:56,005 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 149 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:56,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 158 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 16:41:56,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-11-25 16:41:56,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1258. [2022-11-25 16:41:56,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 902 states have (on average 1.1696230598669624) internal successors, (1055), 947 states have internal predecessors, (1055), 241 states have call successors, (241), 53 states have call predecessors, (241), 110 states have return successors, (548), 257 states have call predecessors, (548), 236 states have call successors, (548) [2022-11-25 16:41:56,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1844 transitions. [2022-11-25 16:41:56,164 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1844 transitions. Word has length 34 [2022-11-25 16:41:56,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:56,164 INFO L495 AbstractCegarLoop]: Abstraction has 1258 states and 1844 transitions. [2022-11-25 16:41:56,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-25 16:41:56,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1844 transitions. [2022-11-25 16:41:56,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 16:41:56,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:56,165 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:56,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 16:41:56,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:56,380 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:41:56,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:56,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1979265987, now seen corresponding path program 2 times [2022-11-25 16:41:56,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:56,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000785673] [2022-11-25 16:41:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:56,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:56,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:56,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 16:41:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 16:41:56,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:56,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000785673] [2022-11-25 16:41:56,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000785673] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:41:56,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002095566] [2022-11-25 16:41:56,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:41:56,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:56,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:56,558 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:41:56,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 16:41:56,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:41:56,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:41:56,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 16:41:56,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:41:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 16:41:56,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:41:56,884 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 16:41:56,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002095566] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:41:56,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:41:56,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-25 16:41:56,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101098042] [2022-11-25 16:41:56,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:41:56,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 16:41:56,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:56,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 16:41:56,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-25 16:41:56,887 INFO L87 Difference]: Start difference. First operand 1258 states and 1844 transitions. Second operand has 19 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 16:41:57,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:57,725 INFO L93 Difference]: Finished difference Result 2350 states and 3816 transitions. [2022-11-25 16:41:57,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 16:41:57,726 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-11-25 16:41:57,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:57,746 INFO L225 Difference]: With dead ends: 2350 [2022-11-25 16:41:57,747 INFO L226 Difference]: Without dead ends: 2333 [2022-11-25 16:41:57,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=1009, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 16:41:57,752 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 314 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:57,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 165 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 16:41:57,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2022-11-25 16:41:57,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1748. [2022-11-25 16:41:57,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1275 states have (on average 1.1654901960784314) internal successors, (1486), 1333 states have internal predecessors, (1486), 308 states have call successors, (308), 82 states have call predecessors, (308), 160 states have return successors, (829), 332 states have call predecessors, (829), 300 states have call successors, (829) [2022-11-25 16:41:57,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 2623 transitions. [2022-11-25 16:41:57,974 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 2623 transitions. Word has length 35 [2022-11-25 16:41:57,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:57,974 INFO L495 AbstractCegarLoop]: Abstraction has 1748 states and 2623 transitions. [2022-11-25 16:41:57,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 16:41:57,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 2623 transitions. [2022-11-25 16:41:57,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-25 16:41:57,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:57,976 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:57,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-25 16:41:58,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 16:41:58,188 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:41:58,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:58,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1607744024, now seen corresponding path program 1 times [2022-11-25 16:41:58,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:58,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699452779] [2022-11-25 16:41:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:58,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:58,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 16:41:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:58,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-25 16:41:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 16:41:58,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:58,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699452779] [2022-11-25 16:41:58,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699452779] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:41:58,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749595087] [2022-11-25 16:41:58,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:58,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:58,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:58,340 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:41:58,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 16:41:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:58,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 16:41:58,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:41:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 16:41:58,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:41:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 16:41:58,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749595087] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 16:41:58,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:41:58,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2022-11-25 16:41:58,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95929268] [2022-11-25 16:41:58,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:41:58,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 16:41:58,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:58,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 16:41:58,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-11-25 16:41:58,705 INFO L87 Difference]: Start difference. First operand 1748 states and 2623 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 16:41:59,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:41:59,124 INFO L93 Difference]: Finished difference Result 1905 states and 3109 transitions. [2022-11-25 16:41:59,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 16:41:59,125 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2022-11-25 16:41:59,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:41:59,138 INFO L225 Difference]: With dead ends: 1905 [2022-11-25 16:41:59,138 INFO L226 Difference]: Without dead ends: 1904 [2022-11-25 16:41:59,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-11-25 16:41:59,142 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 47 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:41:59,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 149 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 16:41:59,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2022-11-25 16:41:59,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1729. [2022-11-25 16:41:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1266 states have (on average 1.1642969984202212) internal successors, (1474), 1324 states have internal predecessors, (1474), 305 states have call successors, (305), 82 states have call predecessors, (305), 153 states have return successors, (696), 322 states have call predecessors, (696), 297 states have call successors, (696) [2022-11-25 16:41:59,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2475 transitions. [2022-11-25 16:41:59,365 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2475 transitions. Word has length 36 [2022-11-25 16:41:59,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:41:59,366 INFO L495 AbstractCegarLoop]: Abstraction has 1729 states and 2475 transitions. [2022-11-25 16:41:59,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 16:41:59,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2475 transitions. [2022-11-25 16:41:59,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 16:41:59,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:41:59,368 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:59,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 16:41:59,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 16:41:59,575 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:41:59,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:59,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1390366252, now seen corresponding path program 2 times [2022-11-25 16:41:59,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:59,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313602706] [2022-11-25 16:41:59,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:59,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:41:59,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:59,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313602706] [2022-11-25 16:41:59,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313602706] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:41:59,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082853866] [2022-11-25 16:41:59,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:41:59,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:41:59,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:59,760 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:41:59,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 16:41:59,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:41:59,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:41:59,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 16:41:59,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:41:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:41:59,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:00,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082853866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:00,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:00,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-11-25 16:42:00,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276757322] [2022-11-25 16:42:00,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:00,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 16:42:00,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:00,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 16:42:00,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-11-25 16:42:00,109 INFO L87 Difference]: Start difference. First operand 1729 states and 2475 transitions. Second operand has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:01,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:01,030 INFO L93 Difference]: Finished difference Result 2553 states and 3969 transitions. [2022-11-25 16:42:01,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 16:42:01,030 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-25 16:42:01,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:01,047 INFO L225 Difference]: With dead ends: 2553 [2022-11-25 16:42:01,047 INFO L226 Difference]: Without dead ends: 2552 [2022-11-25 16:42:01,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 16:42:01,051 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 512 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:01,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 472 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 16:42:01,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2022-11-25 16:42:01,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2411. [2022-11-25 16:42:01,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 1751 states have (on average 1.1462021701884637) internal successors, (2007), 1838 states have internal predecessors, (2007), 425 states have call successors, (425), 106 states have call predecessors, (425), 230 states have return successors, (994), 466 states have call predecessors, (994), 417 states have call successors, (994) [2022-11-25 16:42:01,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 3426 transitions. [2022-11-25 16:42:01,387 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 3426 transitions. Word has length 43 [2022-11-25 16:42:01,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:01,388 INFO L495 AbstractCegarLoop]: Abstraction has 2411 states and 3426 transitions. [2022-11-25 16:42:01,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:01,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 3426 transitions. [2022-11-25 16:42:01,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 16:42:01,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:01,392 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:01,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:01,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 16:42:01,599 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:42:01,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:01,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1058043410, now seen corresponding path program 2 times [2022-11-25 16:42:01,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:01,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301205195] [2022-11-25 16:42:01,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:01,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:01,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 16:42:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:01,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-25 16:42:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 16:42:01,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:01,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301205195] [2022-11-25 16:42:01,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301205195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:01,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524290723] [2022-11-25 16:42:01,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:42:01,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:01,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:01,759 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:01,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 16:42:01,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:42:01,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:01,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 16:42:01,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 16:42:01,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 16:42:02,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524290723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:02,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:02,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-11-25 16:42:02,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344469551] [2022-11-25 16:42:02,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:02,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 16:42:02,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:02,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 16:42:02,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-11-25 16:42:02,206 INFO L87 Difference]: Start difference. First operand 2411 states and 3426 transitions. Second operand has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-25 16:42:04,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:04,158 INFO L93 Difference]: Finished difference Result 5115 states and 8898 transitions. [2022-11-25 16:42:04,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 16:42:04,159 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2022-11-25 16:42:04,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:04,210 INFO L225 Difference]: With dead ends: 5115 [2022-11-25 16:42:04,210 INFO L226 Difference]: Without dead ends: 3631 [2022-11-25 16:42:04,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2022-11-25 16:42:04,227 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 278 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:04,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 304 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 16:42:04,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2022-11-25 16:42:04,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 2793. [2022-11-25 16:42:04,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2793 states, 2029 states have (on average 1.141941843272548) internal successors, (2317), 2127 states have internal predecessors, (2317), 496 states have call successors, (496), 126 states have call predecessors, (496), 263 states have return successors, (1090), 539 states have call predecessors, (1090), 488 states have call successors, (1090) [2022-11-25 16:42:04,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 3903 transitions. [2022-11-25 16:42:04,542 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 3903 transitions. Word has length 44 [2022-11-25 16:42:04,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:04,543 INFO L495 AbstractCegarLoop]: Abstraction has 2793 states and 3903 transitions. [2022-11-25 16:42:04,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-25 16:42:04,543 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 3903 transitions. [2022-11-25 16:42:04,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 16:42:04,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:04,545 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:04,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:04,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 16:42:04,751 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:42:04,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:04,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1051982124, now seen corresponding path program 1 times [2022-11-25 16:42:04,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:04,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351232859] [2022-11-25 16:42:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:04,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:04,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 16:42:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:04,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:42:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:04,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:42:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 16:42:04,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:04,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351232859] [2022-11-25 16:42:04,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351232859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:04,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102034589] [2022-11-25 16:42:04,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:04,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:04,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:04,864 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:04,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 16:42:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:04,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:42:04,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 16:42:04,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 16:42:05,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102034589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:05,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:05,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2022-11-25 16:42:05,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794806440] [2022-11-25 16:42:05,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:05,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:42:05,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:05,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:42:05,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:42:05,140 INFO L87 Difference]: Start difference. First operand 2793 states and 3903 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-25 16:42:05,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:05,439 INFO L93 Difference]: Finished difference Result 4152 states and 6111 transitions. [2022-11-25 16:42:05,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 16:42:05,440 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2022-11-25 16:42:05,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:05,449 INFO L225 Difference]: With dead ends: 4152 [2022-11-25 16:42:05,449 INFO L226 Difference]: Without dead ends: 1643 [2022-11-25 16:42:05,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-11-25 16:42:05,469 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 71 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:05,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 106 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:42:05,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2022-11-25 16:42:05,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1622. [2022-11-25 16:42:05,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1209 states have (on average 1.1017369727047146) internal successors, (1332), 1241 states have internal predecessors, (1332), 292 states have call successors, (292), 91 states have call predecessors, (292), 117 states have return successors, (461), 289 states have call predecessors, (461), 288 states have call successors, (461) [2022-11-25 16:42:05,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2085 transitions. [2022-11-25 16:42:05,654 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2085 transitions. Word has length 44 [2022-11-25 16:42:05,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:05,654 INFO L495 AbstractCegarLoop]: Abstraction has 1622 states and 2085 transitions. [2022-11-25 16:42:05,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-25 16:42:05,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2085 transitions. [2022-11-25 16:42:05,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-25 16:42:05,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:05,656 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:05,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:05,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 16:42:05,862 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:42:05,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:05,863 INFO L85 PathProgramCache]: Analyzing trace with hash 843839239, now seen corresponding path program 1 times [2022-11-25 16:42:05,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:05,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547807370] [2022-11-25 16:42:05,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:05,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:05,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:05,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 16:42:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:06,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:42:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:06,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-25 16:42:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:06,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:42:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 16:42:06,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:06,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547807370] [2022-11-25 16:42:06,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547807370] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:06,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117740763] [2022-11-25 16:42:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:06,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:06,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:06,165 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:06,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 16:42:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:06,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 16:42:06,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 16:42:06,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 16:42:06,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117740763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:06,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:06,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-11-25 16:42:06,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752538901] [2022-11-25 16:42:06,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:06,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 16:42:06,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:06,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 16:42:06,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-11-25 16:42:06,887 INFO L87 Difference]: Start difference. First operand 1622 states and 2085 transitions. Second operand has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 16:42:09,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:09,076 INFO L93 Difference]: Finished difference Result 4071 states and 7472 transitions. [2022-11-25 16:42:09,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-25 16:42:09,077 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 53 [2022-11-25 16:42:09,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:09,119 INFO L225 Difference]: With dead ends: 4071 [2022-11-25 16:42:09,119 INFO L226 Difference]: Without dead ends: 4065 [2022-11-25 16:42:09,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2022-11-25 16:42:09,125 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 236 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:09,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 258 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 16:42:09,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4065 states. [2022-11-25 16:42:09,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4065 to 2921. [2022-11-25 16:42:09,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2921 states, 2020 states have (on average 1.0787128712871288) internal successors, (2179), 2052 states have internal predecessors, (2179), 557 states have call successors, (557), 105 states have call predecessors, (557), 340 states have return successors, (3218), 763 states have call predecessors, (3218), 551 states have call successors, (3218) [2022-11-25 16:42:09,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2921 states to 2921 states and 5954 transitions. [2022-11-25 16:42:09,559 INFO L78 Accepts]: Start accepts. Automaton has 2921 states and 5954 transitions. Word has length 53 [2022-11-25 16:42:09,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:09,559 INFO L495 AbstractCegarLoop]: Abstraction has 2921 states and 5954 transitions. [2022-11-25 16:42:09,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 16:42:09,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2921 states and 5954 transitions. [2022-11-25 16:42:09,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-25 16:42:09,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:09,592 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:09,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:09,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:09,792 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:42:09,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:09,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2013961680, now seen corresponding path program 1 times [2022-11-25 16:42:09,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:09,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649666453] [2022-11-25 16:42:09,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:09,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 16:42:10,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:10,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649666453] [2022-11-25 16:42:10,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649666453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:10,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068649597] [2022-11-25 16:42:10,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:10,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:10,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:10,032 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:10,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 16:42:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:10,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 16:42:10,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:10,208 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 16:42:10,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 16:42:10,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068649597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:10,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:10,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-11-25 16:42:10,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701548430] [2022-11-25 16:42:10,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:10,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 16:42:10,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:10,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 16:42:10,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-11-25 16:42:10,473 INFO L87 Difference]: Start difference. First operand 2921 states and 5954 transitions. Second operand has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:12,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:12,049 INFO L93 Difference]: Finished difference Result 7980 states and 16569 transitions. [2022-11-25 16:42:12,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 16:42:12,050 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-25 16:42:12,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:12,135 INFO L225 Difference]: With dead ends: 7980 [2022-11-25 16:42:12,135 INFO L226 Difference]: Without dead ends: 7979 [2022-11-25 16:42:12,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 16:42:12,142 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 868 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:12,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 299 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 16:42:12,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7979 states. [2022-11-25 16:42:13,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7979 to 7895. [2022-11-25 16:42:13,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7895 states, 5500 states have (on average 1.0812727272727272) internal successors, (5947), 5604 states have internal predecessors, (5947), 1505 states have call successors, (1505), 303 states have call predecessors, (1505), 886 states have return successors, (8678), 1987 states have call predecessors, (8678), 1499 states have call successors, (8678) [2022-11-25 16:42:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7895 states to 7895 states and 16130 transitions. [2022-11-25 16:42:13,204 INFO L78 Accepts]: Start accepts. Automaton has 7895 states and 16130 transitions. Word has length 57 [2022-11-25 16:42:13,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:13,205 INFO L495 AbstractCegarLoop]: Abstraction has 7895 states and 16130 transitions. [2022-11-25 16:42:13,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:13,205 INFO L276 IsEmpty]: Start isEmpty. Operand 7895 states and 16130 transitions. [2022-11-25 16:42:13,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-25 16:42:13,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:13,207 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:13,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:13,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:13,413 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:42:13,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:13,414 INFO L85 PathProgramCache]: Analyzing trace with hash -814290418, now seen corresponding path program 1 times [2022-11-25 16:42:13,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:13,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38096149] [2022-11-25 16:42:13,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:13,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:13,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 16:42:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:13,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:42:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:13,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-25 16:42:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:13,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:42:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 16:42:13,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:13,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38096149] [2022-11-25 16:42:13,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38096149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:13,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895615873] [2022-11-25 16:42:13,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:13,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:13,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:13,778 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:13,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 16:42:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:13,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 16:42:13,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 16:42:13,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 16:42:14,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895615873] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:14,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:14,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-11-25 16:42:14,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010743987] [2022-11-25 16:42:14,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:14,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 16:42:14,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:14,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 16:42:14,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-11-25 16:42:14,494 INFO L87 Difference]: Start difference. First operand 7895 states and 16130 transitions. Second operand has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 16:42:18,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:18,044 INFO L93 Difference]: Finished difference Result 27455 states and 98845 transitions. [2022-11-25 16:42:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-25 16:42:18,045 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2022-11-25 16:42:18,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:18,738 INFO L225 Difference]: With dead ends: 27455 [2022-11-25 16:42:18,738 INFO L226 Difference]: Without dead ends: 20915 [2022-11-25 16:42:18,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=905, Invalid=3517, Unknown=0, NotChecked=0, Total=4422 [2022-11-25 16:42:18,918 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 124 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:18,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 320 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 16:42:18,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20915 states. [2022-11-25 16:42:22,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20915 to 16588. [2022-11-25 16:42:22,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16588 states, 10884 states have (on average 1.0526460859977949) internal successors, (11457), 10949 states have internal predecessors, (11457), 3293 states have call successors, (3293), 380 states have call predecessors, (3293), 2407 states have return successors, (45164), 5258 states have call predecessors, (45164), 3282 states have call successors, (45164) [2022-11-25 16:42:23,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16588 states to 16588 states and 59914 transitions. [2022-11-25 16:42:23,074 INFO L78 Accepts]: Start accepts. Automaton has 16588 states and 59914 transitions. Word has length 55 [2022-11-25 16:42:23,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:23,074 INFO L495 AbstractCegarLoop]: Abstraction has 16588 states and 59914 transitions. [2022-11-25 16:42:23,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 16:42:23,074 INFO L276 IsEmpty]: Start isEmpty. Operand 16588 states and 59914 transitions. [2022-11-25 16:42:23,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 16:42:23,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:23,078 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:23,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:23,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:23,279 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:42:23,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:23,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1106576793, now seen corresponding path program 2 times [2022-11-25 16:42:23,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:23,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622298612] [2022-11-25 16:42:23,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:23,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:23,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 16:42:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:23,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-25 16:42:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:23,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:42:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:23,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-25 16:42:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:23,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:42:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 70 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-25 16:42:23,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:23,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622298612] [2022-11-25 16:42:23,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622298612] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:23,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949438357] [2022-11-25 16:42:23,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:42:23,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:23,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:23,773 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:23,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 16:42:23,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:42:23,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:23,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 16:42:23,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-25 16:42:23,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 78 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-25 16:42:25,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949438357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:25,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:25,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2022-11-25 16:42:25,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960788481] [2022-11-25 16:42:25,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:25,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 16:42:25,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:25,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 16:42:25,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 16:42:25,212 INFO L87 Difference]: Start difference. First operand 16588 states and 59914 transitions. Second operand has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-25 16:42:27,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:27,427 INFO L93 Difference]: Finished difference Result 25421 states and 94291 transitions. [2022-11-25 16:42:27,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 16:42:27,428 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 72 [2022-11-25 16:42:27,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:27,504 INFO L225 Difference]: With dead ends: 25421 [2022-11-25 16:42:27,504 INFO L226 Difference]: Without dead ends: 10188 [2022-11-25 16:42:28,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=667, Invalid=2639, Unknown=0, NotChecked=0, Total=3306 [2022-11-25 16:42:28,124 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 149 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:28,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 339 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 16:42:28,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10188 states. [2022-11-25 16:42:29,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10188 to 9700. [2022-11-25 16:42:29,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9700 states, 6737 states have (on average 1.078076295086834) internal successors, (7263), 6944 states have internal predecessors, (7263), 1900 states have call successors, (1900), 404 states have call predecessors, (1900), 1059 states have return successors, (6461), 2351 states have call predecessors, (6461), 1892 states have call successors, (6461) [2022-11-25 16:42:29,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9700 states to 9700 states and 15624 transitions. [2022-11-25 16:42:29,341 INFO L78 Accepts]: Start accepts. Automaton has 9700 states and 15624 transitions. Word has length 72 [2022-11-25 16:42:29,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:29,342 INFO L495 AbstractCegarLoop]: Abstraction has 9700 states and 15624 transitions. [2022-11-25 16:42:29,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-25 16:42:29,342 INFO L276 IsEmpty]: Start isEmpty. Operand 9700 states and 15624 transitions. [2022-11-25 16:42:29,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-25 16:42:29,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:29,346 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:29,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:29,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-25 16:42:29,552 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:42:29,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:29,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1935422832, now seen corresponding path program 3 times [2022-11-25 16:42:29,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:29,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027911351] [2022-11-25 16:42:29,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:29,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:29,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 16:42:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:29,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-25 16:42:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 62 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 16:42:29,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:29,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027911351] [2022-11-25 16:42:29,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027911351] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:29,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336733381] [2022-11-25 16:42:29,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:42:29,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:29,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:29,825 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:29,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 16:42:29,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-25 16:42:29,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:29,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 16:42:29,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:30,030 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 60 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 16:42:30,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 64 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 16:42:30,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336733381] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:30,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:30,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-11-25 16:42:30,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313671663] [2022-11-25 16:42:30,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:30,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 16:42:30,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:30,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 16:42:30,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 16:42:30,471 INFO L87 Difference]: Start difference. First operand 9700 states and 15624 transitions. Second operand has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-25 16:42:32,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:32,483 INFO L93 Difference]: Finished difference Result 10351 states and 16622 transitions. [2022-11-25 16:42:32,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 16:42:32,484 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2022-11-25 16:42:32,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:32,544 INFO L225 Difference]: With dead ends: 10351 [2022-11-25 16:42:32,544 INFO L226 Difference]: Without dead ends: 10350 [2022-11-25 16:42:32,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=573, Invalid=1977, Unknown=0, NotChecked=0, Total=2550 [2022-11-25 16:42:32,550 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 327 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:32,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 242 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 16:42:32,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10350 states. [2022-11-25 16:42:33,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10350 to 9808. [2022-11-25 16:42:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9808 states, 6809 states have (on average 1.0734322220590395) internal successors, (7309), 7016 states have internal predecessors, (7309), 1900 states have call successors, (1900), 404 states have call predecessors, (1900), 1095 states have return successors, (6555), 2387 states have call predecessors, (6555), 1892 states have call successors, (6555) [2022-11-25 16:42:33,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9808 states to 9808 states and 15764 transitions. [2022-11-25 16:42:33,938 INFO L78 Accepts]: Start accepts. Automaton has 9808 states and 15764 transitions. Word has length 68 [2022-11-25 16:42:33,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:33,939 INFO L495 AbstractCegarLoop]: Abstraction has 9808 states and 15764 transitions. [2022-11-25 16:42:33,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-25 16:42:33,939 INFO L276 IsEmpty]: Start isEmpty. Operand 9808 states and 15764 transitions. [2022-11-25 16:42:33,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-25 16:42:33,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:33,944 INFO L195 NwaCegarLoop]: trace histogram [13, 9, 7, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:33,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:34,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 16:42:34,150 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:42:34,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:34,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1269437730, now seen corresponding path program 2 times [2022-11-25 16:42:34,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:34,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286364308] [2022-11-25 16:42:34,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:34,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:34,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 16:42:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:34,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-25 16:42:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:34,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:42:34,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:34,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:42:34,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:34,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-25 16:42:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:34,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:42:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:34,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 16:42:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 155 proven. 28 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-11-25 16:42:34,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:34,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286364308] [2022-11-25 16:42:34,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286364308] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:34,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040119733] [2022-11-25 16:42:34,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:42:34,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:34,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:34,449 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:34,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 16:42:34,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:42:34,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:34,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 16:42:34,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 157 proven. 15 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-25 16:42:34,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 157 proven. 26 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-11-25 16:42:35,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040119733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:35,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:35,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 8] total 14 [2022-11-25 16:42:35,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412581553] [2022-11-25 16:42:35,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:35,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 16:42:35,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:35,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 16:42:35,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-25 16:42:35,084 INFO L87 Difference]: Start difference. First operand 9808 states and 15764 transitions. Second operand has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2022-11-25 16:42:36,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:36,338 INFO L93 Difference]: Finished difference Result 18920 states and 34325 transitions. [2022-11-25 16:42:36,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 16:42:36,339 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) Word has length 113 [2022-11-25 16:42:36,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:36,408 INFO L225 Difference]: With dead ends: 18920 [2022-11-25 16:42:36,408 INFO L226 Difference]: Without dead ends: 10752 [2022-11-25 16:42:36,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 232 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2022-11-25 16:42:36,463 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 44 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:36,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 85 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:42:36,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10752 states. [2022-11-25 16:42:37,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10752 to 9802. [2022-11-25 16:42:37,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9802 states, 6806 states have (on average 1.0734645900675874) internal successors, (7306), 7013 states have internal predecessors, (7306), 1897 states have call successors, (1897), 404 states have call predecessors, (1897), 1095 states have return successors, (6475), 2384 states have call predecessors, (6475), 1862 states have call successors, (6475) [2022-11-25 16:42:37,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9802 states to 9802 states and 15678 transitions. [2022-11-25 16:42:37,764 INFO L78 Accepts]: Start accepts. Automaton has 9802 states and 15678 transitions. Word has length 113 [2022-11-25 16:42:37,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:37,764 INFO L495 AbstractCegarLoop]: Abstraction has 9802 states and 15678 transitions. [2022-11-25 16:42:37,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2022-11-25 16:42:37,765 INFO L276 IsEmpty]: Start isEmpty. Operand 9802 states and 15678 transitions. [2022-11-25 16:42:37,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-25 16:42:37,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:37,771 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:37,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:37,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:37,977 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:42:37,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:37,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1307053986, now seen corresponding path program 3 times [2022-11-25 16:42:37,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:37,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114917056] [2022-11-25 16:42:37,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:37,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:38,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 16:42:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:38,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:42:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:38,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:42:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:38,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-25 16:42:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:38,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:42:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:38,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-25 16:42:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:38,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:42:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:38,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 16:42:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:38,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-25 16:42:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 117 proven. 51 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-25 16:42:38,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:38,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114917056] [2022-11-25 16:42:38,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114917056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:38,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249301752] [2022-11-25 16:42:38,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:42:38,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:38,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:38,432 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:38,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 16:42:38,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 16:42:38,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:38,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 16:42:38,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 153 proven. 26 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-25 16:42:38,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 123 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-25 16:42:39,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249301752] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:39,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:39,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 17 [2022-11-25 16:42:39,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047827424] [2022-11-25 16:42:39,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:39,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 16:42:39,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:39,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 16:42:39,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-11-25 16:42:39,689 INFO L87 Difference]: Start difference. First operand 9802 states and 15678 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2022-11-25 16:42:41,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:41,638 INFO L93 Difference]: Finished difference Result 20475 states and 41580 transitions. [2022-11-25 16:42:41,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 16:42:41,639 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) Word has length 100 [2022-11-25 16:42:41,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:41,720 INFO L225 Difference]: With dead ends: 20475 [2022-11-25 16:42:41,720 INFO L226 Difference]: Without dead ends: 12341 [2022-11-25 16:42:41,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 208 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2022-11-25 16:42:41,793 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 85 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:41,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 125 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:42:41,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12341 states. [2022-11-25 16:42:43,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12341 to 11980. [2022-11-25 16:42:43,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11980 states, 8084 states have (on average 1.053686293913904) internal successors, (8518), 8271 states have internal predecessors, (8518), 2417 states have call successors, (2417), 424 states have call predecessors, (2417), 1475 states have return successors, (8115), 3284 states have call predecessors, (8115), 2362 states have call successors, (8115) [2022-11-25 16:42:43,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11980 states to 11980 states and 19050 transitions. [2022-11-25 16:42:43,067 INFO L78 Accepts]: Start accepts. Automaton has 11980 states and 19050 transitions. Word has length 100 [2022-11-25 16:42:43,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:43,068 INFO L495 AbstractCegarLoop]: Abstraction has 11980 states and 19050 transitions. [2022-11-25 16:42:43,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2022-11-25 16:42:43,068 INFO L276 IsEmpty]: Start isEmpty. Operand 11980 states and 19050 transitions. [2022-11-25 16:42:43,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 16:42:43,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:43,076 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 7, 7, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:43,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:43,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-25 16:42:43,282 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:42:43,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:43,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1104252262, now seen corresponding path program 3 times [2022-11-25 16:42:43,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:43,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628965381] [2022-11-25 16:42:43,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:43,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:43,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 16:42:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:43,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:42:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:43,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-25 16:42:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:43,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:42:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 120 proven. 86 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 16:42:43,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:43,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628965381] [2022-11-25 16:42:43,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628965381] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:43,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004683453] [2022-11-25 16:42:43,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:42:43,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:43,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:43,724 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:43,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 16:42:43,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-25 16:42:43,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:43,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 16:42:43,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 113 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-25 16:42:44,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 142 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-25 16:42:44,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004683453] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:44,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:44,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2022-11-25 16:42:44,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171624129] [2022-11-25 16:42:44,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:44,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 16:42:44,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:44,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 16:42:44,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-11-25 16:42:44,276 INFO L87 Difference]: Start difference. First operand 11980 states and 19050 transitions. Second operand has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-25 16:42:47,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:47,118 INFO L93 Difference]: Finished difference Result 20826 states and 35598 transitions. [2022-11-25 16:42:47,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-25 16:42:47,119 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 87 [2022-11-25 16:42:47,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:47,188 INFO L225 Difference]: With dead ends: 20826 [2022-11-25 16:42:47,188 INFO L226 Difference]: Without dead ends: 10351 [2022-11-25 16:42:47,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=983, Invalid=3439, Unknown=0, NotChecked=0, Total=4422 [2022-11-25 16:42:47,302 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 220 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:47,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 160 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 16:42:47,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10351 states. [2022-11-25 16:42:48,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10351 to 8751. [2022-11-25 16:42:48,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8751 states, 5978 states have (on average 1.0463365674138507) internal successors, (6255), 6154 states have internal predecessors, (6255), 1711 states have call successors, (1711), 352 states have call predecessors, (1711), 1058 states have return successors, (4097), 2244 states have call predecessors, (4097), 1677 states have call successors, (4097) [2022-11-25 16:42:48,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8751 states to 8751 states and 12063 transitions. [2022-11-25 16:42:48,544 INFO L78 Accepts]: Start accepts. Automaton has 8751 states and 12063 transitions. Word has length 87 [2022-11-25 16:42:48,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:48,545 INFO L495 AbstractCegarLoop]: Abstraction has 8751 states and 12063 transitions. [2022-11-25 16:42:48,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-25 16:42:48,545 INFO L276 IsEmpty]: Start isEmpty. Operand 8751 states and 12063 transitions. [2022-11-25 16:42:48,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-25 16:42:48,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:48,551 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:48,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:48,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 16:42:48,757 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:42:48,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:48,758 INFO L85 PathProgramCache]: Analyzing trace with hash -133792040, now seen corresponding path program 3 times [2022-11-25 16:42:48,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:48,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039813176] [2022-11-25 16:42:48,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:48,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:49,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:49,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039813176] [2022-11-25 16:42:49,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039813176] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:49,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809497824] [2022-11-25 16:42:49,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:42:49,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:49,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:49,230 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:49,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 16:42:49,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-25 16:42:49,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:49,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 16:42:49,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:49,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:50,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809497824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:50,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:50,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-11-25 16:42:50,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425011054] [2022-11-25 16:42:50,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:50,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-25 16:42:50,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:50,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-25 16:42:50,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-11-25 16:42:50,138 INFO L87 Difference]: Start difference. First operand 8751 states and 12063 transitions. Second operand has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:53,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:53,245 INFO L93 Difference]: Finished difference Result 15928 states and 22083 transitions. [2022-11-25 16:42:53,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-25 16:42:53,245 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-11-25 16:42:53,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:53,312 INFO L225 Difference]: With dead ends: 15928 [2022-11-25 16:42:53,312 INFO L226 Difference]: Without dead ends: 15927 [2022-11-25 16:42:53,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2022-11-25 16:42:53,323 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 993 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:53,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [997 Valid, 684 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 16:42:53,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15927 states. [2022-11-25 16:42:54,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15927 to 15927. [2022-11-25 16:42:54,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15927 states, 10802 states have (on average 1.0456396963525274) internal successors, (11295), 11194 states have internal predecessors, (11295), 3103 states have call successors, (3103), 568 states have call predecessors, (3103), 2018 states have return successors, (7673), 4164 states have call predecessors, (7673), 3069 states have call successors, (7673) [2022-11-25 16:42:55,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15927 states to 15927 states and 22071 transitions. [2022-11-25 16:42:55,027 INFO L78 Accepts]: Start accepts. Automaton has 15927 states and 22071 transitions. Word has length 91 [2022-11-25 16:42:55,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:55,028 INFO L495 AbstractCegarLoop]: Abstraction has 15927 states and 22071 transitions. [2022-11-25 16:42:55,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:55,028 INFO L276 IsEmpty]: Start isEmpty. Operand 15927 states and 22071 transitions. [2022-11-25 16:42:55,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-25 16:42:55,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:55,033 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:55,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:55,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 16:42:55,237 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-25 16:42:55,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:55,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1765664819, now seen corresponding path program 4 times [2022-11-25 16:42:55,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:55,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236848447] [2022-11-25 16:42:55,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:55,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:55,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 16:42:55,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:55,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:42:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:55,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:42:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:55,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:42:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:55,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-25 16:42:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:55,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 16:42:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:55,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 16:42:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:55,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-25 16:42:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 51 proven. 69 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-25 16:42:55,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:55,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236848447] [2022-11-25 16:42:55,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236848447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:55,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969379889] [2022-11-25 16:42:55,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:42:55,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:55,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:55,840 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:55,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d36406-2f96-42ca-ac17-61bb9b126945/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 16:42:55,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:42:55,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:55,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 16:42:55,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-25 16:42:56,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 42 proven. 93 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-25 16:42:58,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969379889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:58,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:58,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2022-11-25 16:42:58,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59602303] [2022-11-25 16:42:58,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:58,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 16:42:58,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:58,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 16:42:58,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 16:42:58,021 INFO L87 Difference]: Start difference. First operand 15927 states and 22071 transitions. Second operand has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2022-11-25 16:43:05,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:05,861 INFO L93 Difference]: Finished difference Result 45665 states and 72940 transitions. [2022-11-25 16:43:05,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-11-25 16:43:05,861 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) Word has length 91 [2022-11-25 16:43:05,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:06,104 INFO L225 Difference]: With dead ends: 45665 [2022-11-25 16:43:06,104 INFO L226 Difference]: Without dead ends: 44563 [2022-11-25 16:43:06,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12267 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5454, Invalid=27126, Unknown=0, NotChecked=0, Total=32580 [2022-11-25 16:43:06,152 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 341 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 888 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 2145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 888 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:06,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 346 Invalid, 2145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [888 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 16:43:06,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44563 states.