./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/Ackermann02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 5e519f3a 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_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc --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 20c02b81d1b1bc312ccc75d6e9b31c6252d69e8a6e2560afe3a2a95a3e53102a --- 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-5e519f3 [2022-11-02 20:27:39,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:27:39,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:27:40,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:27:40,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:27:40,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:27:40,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:27:40,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:27:40,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:27:40,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:27:40,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:27:40,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:27:40,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:27:40,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:27:40,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:27:40,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:27:40,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:27:40,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:27:40,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:27:40,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:27:40,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:27:40,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:27:40,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:27:40,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:27:40,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:27:40,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:27:40,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:27:40,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:27:40,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:27:40,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:27:40,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:27:40,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:27:40,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:27:40,111 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:27:40,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:27:40,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:27:40,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:27:40,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:27:40,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:27:40,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:27:40,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:27:40,119 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-02 20:27:40,163 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:27:40,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:27:40,164 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:27:40,164 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:27:40,165 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:27:40,165 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:27:40,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:27:40,167 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:27:40,167 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:27:40,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:27:40,169 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:27:40,169 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:27:40,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:27:40,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:27:40,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:27:40,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:27:40,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:27:40,171 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:27:40,171 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-02 20:27:40,171 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:27:40,171 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:27:40,172 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:27:40,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:27:40,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:27:40,172 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:27:40,173 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:27:40,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:27:40,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:27:40,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:27:40,174 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:27:40,174 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:27:40,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:27:40,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:27:40,175 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20c02b81d1b1bc312ccc75d6e9b31c6252d69e8a6e2560afe3a2a95a3e53102a [2022-11-02 20:27:40,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:27:40,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:27:40,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:27:40,549 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:27:40,550 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:27:40,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/recursive/Ackermann02.c [2022-11-02 20:27:40,643 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/data/74a54cdd5/72ae1b5fab47423093e5ff2bd78ca59f/FLAG2cf83c0e5 [2022-11-02 20:27:41,260 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:27:41,262 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/sv-benchmarks/c/recursive/Ackermann02.c [2022-11-02 20:27:41,270 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/data/74a54cdd5/72ae1b5fab47423093e5ff2bd78ca59f/FLAG2cf83c0e5 [2022-11-02 20:27:41,624 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/data/74a54cdd5/72ae1b5fab47423093e5ff2bd78ca59f [2022-11-02 20:27:41,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:27:41,629 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:27:41,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:27:41,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:27:41,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:27:41,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:27:41" (1/1) ... [2022-11-02 20:27:41,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55ab4a7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:27:41, skipping insertion in model container [2022-11-02 20:27:41,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:27:41" (1/1) ... [2022-11-02 20:27:41,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:27:41,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:27:41,864 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/sv-benchmarks/c/recursive/Ackermann02.c[1157,1170] [2022-11-02 20:27:41,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:27:41,875 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:27:41,895 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/sv-benchmarks/c/recursive/Ackermann02.c[1157,1170] [2022-11-02 20:27:41,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:27:41,911 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:27:41,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:27:41 WrapperNode [2022-11-02 20:27:41,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:27:41,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:27:41,916 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:27:41,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:27:41,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:27:41" (1/1) ... [2022-11-02 20:27:41,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:27:41" (1/1) ... [2022-11-02 20:27:41,947 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2022-11-02 20:27:41,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:27:41,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:27:41,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:27:41,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:27:41,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:27:41" (1/1) ... [2022-11-02 20:27:41,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:27:41" (1/1) ... [2022-11-02 20:27:41,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:27:41" (1/1) ... [2022-11-02 20:27:41,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:27:41" (1/1) ... [2022-11-02 20:27:41,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:27:41" (1/1) ... [2022-11-02 20:27:41,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:27:41" (1/1) ... [2022-11-02 20:27:41,969 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:27:41" (1/1) ... [2022-11-02 20:27:41,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:27:41" (1/1) ... [2022-11-02 20:27:41,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:27:41,973 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:27:41,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:27:41,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:27:41,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:27:41" (1/1) ... [2022-11-02 20:27:41,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:27:41,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:42,013 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:27:42,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:27:42,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:27:42,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:27:42,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:27:42,070 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2022-11-02 20:27:42,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2022-11-02 20:27:42,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:27:42,158 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:27:42,162 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:27:42,340 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:27:42,348 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:27:42,349 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-02 20:27:42,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:27:42 BoogieIcfgContainer [2022-11-02 20:27:42,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:27:42,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:27:42,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:27:42,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:27:42,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:27:41" (1/3) ... [2022-11-02 20:27:42,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73145a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:27:42, skipping insertion in model container [2022-11-02 20:27:42,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:27:41" (2/3) ... [2022-11-02 20:27:42,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73145a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:27:42, skipping insertion in model container [2022-11-02 20:27:42,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:27:42" (3/3) ... [2022-11-02 20:27:42,363 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann02.c [2022-11-02 20:27:42,388 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:27:42,388 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-02 20:27:42,451 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:27:42,459 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@29657345, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:27:42,460 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-02 20:27:42,465 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) [2022-11-02 20:27:42,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-02 20:27:42,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:42,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:42,476 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:27:42,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:42,483 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2022-11-02 20:27:42,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:42,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479994062] [2022-11-02 20:27:42,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:42,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:42,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:42,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479994062] [2022-11-02 20:27:42,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479994062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:27:42,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:27:42,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:27:42,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523337502] [2022-11-02 20:27:42,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:27:42,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:27:42,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:43,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:27:43,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:27:43,008 INFO L87 Difference]: Start difference. First operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:27:43,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:43,276 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2022-11-02 20:27:43,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:27:43,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-02 20:27:43,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:43,293 INFO L225 Difference]: With dead ends: 73 [2022-11-02 20:27:43,296 INFO L226 Difference]: Without dead ends: 59 [2022-11-02 20:27:43,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:27:43,308 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 55 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:43,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 125 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:27:43,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-02 20:27:43,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2022-11-02 20:27:43,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 42 states have internal predecessors, (52), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:27:43,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-11-02 20:27:43,390 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2022-11-02 20:27:43,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:43,390 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-11-02 20:27:43,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:27:43,391 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-11-02 20:27:43,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-02 20:27:43,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:43,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:43,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:27:43,393 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:27:43,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:43,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2022-11-02 20:27:43,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:43,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074581555] [2022-11-02 20:27:43,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:43,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:43,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:43,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074581555] [2022-11-02 20:27:43,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074581555] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:27:43,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:27:43,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:27:43,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429855657] [2022-11-02 20:27:43,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:27:43,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:27:43,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:43,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:27:43,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:27:43,502 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:27:43,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:43,632 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-11-02 20:27:43,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:27:43,637 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 [2022-11-02 20:27:43,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:43,639 INFO L225 Difference]: With dead ends: 51 [2022-11-02 20:27:43,639 INFO L226 Difference]: Without dead ends: 49 [2022-11-02 20:27:43,640 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 [2022-11-02 20:27:43,641 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 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 [2022-11-02 20:27:43,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 45 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:27:43,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-02 20:27:43,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-02 20:27:43,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.411764705882353) internal successors, (48), 40 states have internal predecessors, (48), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:27:43,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-11-02 20:27:43,673 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 9 [2022-11-02 20:27:43,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:43,674 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-11-02 20:27:43,675 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) [2022-11-02 20:27:43,676 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-11-02 20:27:43,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-02 20:27:43,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:43,679 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:43,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:27:43,681 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:27:43,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:43,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2022-11-02 20:27:43,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:43,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857391305] [2022-11-02 20:27:43,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:43,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:43,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:43,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857391305] [2022-11-02 20:27:43,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857391305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:27:43,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:27:43,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:27:43,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254882849] [2022-11-02 20:27:43,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:27:43,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:27:43,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:43,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:27:43,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:27:43,787 INFO L87 Difference]: Start difference. First operand 49 states and 61 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) [2022-11-02 20:27:43,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:43,981 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2022-11-02 20:27:43,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:27:43,982 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 [2022-11-02 20:27:43,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:43,984 INFO L225 Difference]: With dead ends: 76 [2022-11-02 20:27:43,984 INFO L226 Difference]: Without dead ends: 75 [2022-11-02 20:27:43,985 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 [2022-11-02 20:27:43,987 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 43 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:43,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 87 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:27:43,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-02 20:27:44,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2022-11-02 20:27:44,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 55 states have internal predecessors, (68), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-02 20:27:44,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2022-11-02 20:27:44,005 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 9 [2022-11-02 20:27:44,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:44,006 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2022-11-02 20:27:44,006 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) [2022-11-02 20:27:44,007 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2022-11-02 20:27:44,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-02 20:27:44,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:44,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:44,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:27:44,008 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:27:44,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:44,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2022-11-02 20:27:44,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:44,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393289692] [2022-11-02 20:27:44,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:44,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:44,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:44,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393289692] [2022-11-02 20:27:44,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393289692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:27:44,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:27:44,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:27:44,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137907518] [2022-11-02 20:27:44,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:27:44,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:27:44,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:44,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:27:44,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:27:44,079 INFO L87 Difference]: Start difference. First operand 68 states and 87 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) [2022-11-02 20:27:44,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:44,190 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2022-11-02 20:27:44,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:27:44,191 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 [2022-11-02 20:27:44,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:44,199 INFO L225 Difference]: With dead ends: 116 [2022-11-02 20:27:44,199 INFO L226 Difference]: Without dead ends: 108 [2022-11-02 20:27:44,200 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 [2022-11-02 20:27:44,208 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 39 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:44,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 85 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:27:44,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-02 20:27:44,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-11-02 20:27:44,242 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) [2022-11-02 20:27:44,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2022-11-02 20:27:44,245 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 10 [2022-11-02 20:27:44,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:44,245 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2022-11-02 20:27:44,246 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) [2022-11-02 20:27:44,246 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2022-11-02 20:27:44,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 20:27:44,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:44,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:44,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:27:44,253 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:27:44,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:44,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1072007509, now seen corresponding path program 1 times [2022-11-02 20:27:44,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:44,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008295418] [2022-11-02 20:27:44,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:44,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:44,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:44,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008295418] [2022-11-02 20:27:44,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008295418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:27:44,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:27:44,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:27:44,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715614761] [2022-11-02 20:27:44,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:27:44,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:27:44,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:44,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:27:44,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:27:44,358 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-02 20:27:44,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:44,452 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2022-11-02 20:27:44,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:27:44,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 12 [2022-11-02 20:27:44,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:44,455 INFO L225 Difference]: With dead ends: 109 [2022-11-02 20:27:44,455 INFO L226 Difference]: Without dead ends: 108 [2022-11-02 20:27:44,455 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 [2022-11-02 20:27:44,461 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 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 [2022-11-02 20:27:44,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 92 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:27:44,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-02 20:27:44,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-11-02 20:27:44,496 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) [2022-11-02 20:27:44,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2022-11-02 20:27:44,498 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 12 [2022-11-02 20:27:44,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:44,499 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2022-11-02 20:27:44,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-02 20:27:44,499 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2022-11-02 20:27:44,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:27:44,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:44,501 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:44,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:27:44,501 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:27:44,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:44,502 INFO L85 PathProgramCache]: Analyzing trace with hash 219392943, now seen corresponding path program 1 times [2022-11-02 20:27:44,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:44,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341370736] [2022-11-02 20:27:44,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:44,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:44,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:44,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341370736] [2022-11-02 20:27:44,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341370736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:27:44,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:27:44,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:27:44,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803722249] [2022-11-02 20:27:44,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:27:44,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:27:44,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:44,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:27:44,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:27:44,560 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:27:44,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:44,622 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2022-11-02 20:27:44,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:27:44,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-02 20:27:44,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:44,624 INFO L225 Difference]: With dead ends: 168 [2022-11-02 20:27:44,624 INFO L226 Difference]: Without dead ends: 97 [2022-11-02 20:27:44,626 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 [2022-11-02 20:27:44,627 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 [2022-11-02 20:27:44,628 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] [2022-11-02 20:27:44,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-02 20:27:44,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-11-02 20:27:44,640 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) [2022-11-02 20:27:44,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2022-11-02 20:27:44,642 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 16 [2022-11-02 20:27:44,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:44,643 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2022-11-02 20:27:44,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:27:44,643 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2022-11-02 20:27:44,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:27:44,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:44,645 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:44,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:27:44,645 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:27:44,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:44,646 INFO L85 PathProgramCache]: Analyzing trace with hash 219399894, now seen corresponding path program 1 times [2022-11-02 20:27:44,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:44,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849264746] [2022-11-02 20:27:44,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:44,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:44,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:44,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849264746] [2022-11-02 20:27:44,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849264746] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:44,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472278195] [2022-11-02 20:27:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:44,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:44,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:44,768 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:44,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:27:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:44,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:27:44,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:44,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:45,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472278195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:27:45,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:27:45,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-02 20:27:45,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286245830] [2022-11-02 20:27:45,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:27:45,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:27:45,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:45,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:27:45,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:27:45,045 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:27:45,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:45,415 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2022-11-02 20:27:45,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:27:45,416 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-02 20:27:45,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:45,419 INFO L225 Difference]: With dead ends: 274 [2022-11-02 20:27:45,419 INFO L226 Difference]: Without dead ends: 272 [2022-11-02 20:27:45,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:27:45,421 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 267 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:45,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 165 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:27:45,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-02 20:27:45,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2022-11-02 20:27:45,455 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) [2022-11-02 20:27:45,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2022-11-02 20:27:45,459 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 16 [2022-11-02 20:27:45,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:45,460 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2022-11-02 20:27:45,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:27:45,460 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2022-11-02 20:27:45,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:27:45,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:45,461 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:45,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:27:45,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:27:45,684 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:27:45,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:45,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1162887243, now seen corresponding path program 1 times [2022-11-02 20:27:45,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:45,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780132672] [2022-11-02 20:27:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:45,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:45,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:45,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780132672] [2022-11-02 20:27:45,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780132672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:45,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255274522] [2022-11-02 20:27:45,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:45,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:45,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:45,825 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:45,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:27:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:45,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:27:45,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:45,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:27:45,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255274522] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:27:45,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:27:45,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-11-02 20:27:45,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793435644] [2022-11-02 20:27:45,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:27:45,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:27:45,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:45,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:27:45,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:27:45,960 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:27:46,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:46,117 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2022-11-02 20:27:46,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:27:46,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-02 20:27:46,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:46,121 INFO L225 Difference]: With dead ends: 328 [2022-11-02 20:27:46,122 INFO L226 Difference]: Without dead ends: 327 [2022-11-02 20:27:46,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:27:46,123 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 40 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:46,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 100 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:27:46,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-11-02 20:27:46,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2022-11-02 20:27:46,169 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) [2022-11-02 20:27:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2022-11-02 20:27:46,173 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 17 [2022-11-02 20:27:46,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:46,174 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2022-11-02 20:27:46,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:27:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2022-11-02 20:27:46,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-02 20:27:46,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:46,175 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:46,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:27:46,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:46,399 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:27:46,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:46,399 INFO L85 PathProgramCache]: Analyzing trace with hash 523262015, now seen corresponding path program 1 times [2022-11-02 20:27:46,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:46,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602645028] [2022-11-02 20:27:46,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:46,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:46,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:46,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602645028] [2022-11-02 20:27:46,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602645028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:46,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121423596] [2022-11-02 20:27:46,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:46,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:46,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:46,539 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:46,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:27:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:46,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:27:46,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:46,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:46,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121423596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:27:46,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:27:46,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-02 20:27:46,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621184121] [2022-11-02 20:27:46,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:27:46,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:27:46,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:46,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:27:46,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:27:46,775 INFO L87 Difference]: Start difference. First operand 293 states and 373 transitions. Second operand has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:27:47,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:47,147 INFO L93 Difference]: Finished difference Result 591 states and 792 transitions. [2022-11-02 20:27:47,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:27:47,148 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-02 20:27:47,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:47,160 INFO L225 Difference]: With dead ends: 591 [2022-11-02 20:27:47,160 INFO L226 Difference]: Without dead ends: 590 [2022-11-02 20:27:47,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:27:47,165 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 140 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:47,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 232 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:27:47,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-11-02 20:27:47,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 521. [2022-11-02 20:27:47,257 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) [2022-11-02 20:27:47,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2022-11-02 20:27:47,262 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 20 [2022-11-02 20:27:47,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:47,263 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2022-11-02 20:27:47,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:27:47,263 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2022-11-02 20:27:47,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-02 20:27:47,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:47,270 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] [2022-11-02 20:27:47,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:27:47,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:47,484 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:27:47,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:47,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2022-11-02 20:27:47,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:47,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839022281] [2022-11-02 20:27:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:47,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:47,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:27:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:27:47,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:47,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839022281] [2022-11-02 20:27:47,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839022281] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:47,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121851212] [2022-11-02 20:27:47,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:47,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:47,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:47,651 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:47,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:27:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:47,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:27:47,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:27:47,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:27:48,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121851212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:27:48,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:27:48,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-02 20:27:48,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744163451] [2022-11-02 20:27:48,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:27:48,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:27:48,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:48,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:27:48,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:27:48,088 INFO L87 Difference]: Start difference. First operand 521 states and 649 transitions. Second operand has 15 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:27:48,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:48,586 INFO L93 Difference]: Finished difference Result 870 states and 1257 transitions. [2022-11-02 20:27:48,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:27:48,587 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-11-02 20:27:48,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:48,593 INFO L225 Difference]: With dead ends: 870 [2022-11-02 20:27:48,593 INFO L226 Difference]: Without dead ends: 868 [2022-11-02 20:27:48,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:27:48,596 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 178 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:48,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 135 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:27:48,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-11-02 20:27:48,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 728. [2022-11-02 20:27:48,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 542 states have (on average 1.2011070110701108) internal successors, (651), 572 states have internal predecessors, (651), 123 states have call successors, (123), 35 states have call predecessors, (123), 57 states have return successors, (215), 120 states have call predecessors, (215), 119 states have call successors, (215) [2022-11-02 20:27:48,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 989 transitions. [2022-11-02 20:27:48,742 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 989 transitions. Word has length 24 [2022-11-02 20:27:48,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:48,743 INFO L495 AbstractCegarLoop]: Abstraction has 728 states and 989 transitions. [2022-11-02 20:27:48,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:27:48,743 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 989 transitions. [2022-11-02 20:27:48,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 20:27:48,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:48,748 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] [2022-11-02 20:27:48,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:27:48,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:27:48,974 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:27:48,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:48,975 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2022-11-02 20:27:48,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:48,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177841873] [2022-11-02 20:27:48,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:48,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:48,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:49,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:27:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:27:49,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:49,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177841873] [2022-11-02 20:27:49,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177841873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:49,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045536098] [2022-11-02 20:27:49,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:49,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:49,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:49,165 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:49,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:27:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:49,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:27:49,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:27:49,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:27:49,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045536098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:27:49,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:27:49,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2022-11-02 20:27:49,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559803788] [2022-11-02 20:27:49,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:27:49,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:27:49,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:49,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:27:49,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:27:49,296 INFO L87 Difference]: Start difference. First operand 728 states and 989 transitions. Second operand has 5 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:27:49,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:49,519 INFO L93 Difference]: Finished difference Result 737 states and 999 transitions. [2022-11-02 20:27:49,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:27:49,520 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-11-02 20:27:49,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:49,528 INFO L225 Difference]: With dead ends: 737 [2022-11-02 20:27:49,528 INFO L226 Difference]: Without dead ends: 736 [2022-11-02 20:27:49,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:27:49,532 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 41 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:49,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 102 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:27:49,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-11-02 20:27:49,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 727. [2022-11-02 20:27:49,639 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) [2022-11-02 20:27:49,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 981 transitions. [2022-11-02 20:27:49,646 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 981 transitions. Word has length 25 [2022-11-02 20:27:49,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:49,647 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 981 transitions. [2022-11-02 20:27:49,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:27:49,647 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 981 transitions. [2022-11-02 20:27:49,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:27:49,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:49,649 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:49,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:27:49,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:27:49,871 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:27:49,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:49,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1583952330, now seen corresponding path program 1 times [2022-11-02 20:27:49,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:49,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130957349] [2022-11-02 20:27:49,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:49,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:50,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:27:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:27:50,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:50,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130957349] [2022-11-02 20:27:50,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130957349] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:50,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134394575] [2022-11-02 20:27:50,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:50,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:50,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:50,068 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:50,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:27:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:50,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:27:50,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:27:50,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:50,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:27:50,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134394575] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:50,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:27:50,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2022-11-02 20:27:50,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789085868] [2022-11-02 20:27:50,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:27:50,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:27:50,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:50,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:27:50,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:27:50,396 INFO L87 Difference]: Start difference. First operand 727 states and 981 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:27:50,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:50,665 INFO L93 Difference]: Finished difference Result 886 states and 1251 transitions. [2022-11-02 20:27:50,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:27:50,666 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-11-02 20:27:50,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:50,672 INFO L225 Difference]: With dead ends: 886 [2022-11-02 20:27:50,672 INFO L226 Difference]: Without dead ends: 885 [2022-11-02 20:27:50,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:27:50,674 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 52 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:50,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 109 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:27:50,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-11-02 20:27:50,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 812. [2022-11-02 20:27:50,771 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) [2022-11-02 20:27:50,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1076 transitions. [2022-11-02 20:27:50,779 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1076 transitions. Word has length 28 [2022-11-02 20:27:50,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:50,779 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1076 transitions. [2022-11-02 20:27:50,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:27:50,780 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1076 transitions. [2022-11-02 20:27:50,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 20:27:50,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:50,781 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:50,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:27:50,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:50,994 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:27:50,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:50,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1777813581, now seen corresponding path program 1 times [2022-11-02 20:27:50,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:50,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587857059] [2022-11-02 20:27:50,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:50,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:51,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:27:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:51,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:27:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:27:51,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:51,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587857059] [2022-11-02 20:27:51,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587857059] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:51,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150564517] [2022-11-02 20:27:51,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:51,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:51,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:51,181 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:51,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:27:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:51,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:27:51,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:27:51,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:27:51,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150564517] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:27:51,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:27:51,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-11-02 20:27:51,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611914175] [2022-11-02 20:27:51,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:27:51,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:27:51,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:51,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:27:51,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:27:51,558 INFO L87 Difference]: Start difference. First operand 812 states and 1076 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-02 20:27:52,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:52,370 INFO L93 Difference]: Finished difference Result 1503 states and 2506 transitions. [2022-11-02 20:27:52,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:27:52,371 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-11-02 20:27:52,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:52,382 INFO L225 Difference]: With dead ends: 1503 [2022-11-02 20:27:52,383 INFO L226 Difference]: Without dead ends: 1501 [2022-11-02 20:27:52,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:27:52,385 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 130 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:52,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 172 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:27:52,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-11-02 20:27:52,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1258. [2022-11-02 20:27:52,556 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) [2022-11-02 20:27:52,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1844 transitions. [2022-11-02 20:27:52,570 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1844 transitions. Word has length 33 [2022-11-02 20:27:52,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:52,570 INFO L495 AbstractCegarLoop]: Abstraction has 1258 states and 1844 transitions. [2022-11-02 20:27:52,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-02 20:27:52,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1844 transitions. [2022-11-02 20:27:52,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 20:27:52,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:52,573 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:52,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:27:52,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:52,798 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:27:52,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:52,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1227703372, now seen corresponding path program 2 times [2022-11-02 20:27:52,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:52,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005576576] [2022-11-02 20:27:52,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:52,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:52,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:27:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 20:27:52,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:52,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005576576] [2022-11-02 20:27:52,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005576576] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:52,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599548116] [2022-11-02 20:27:52,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:27:52,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:52,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:52,974 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:53,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:27:53,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:27:53,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:27:53,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:27:53,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 20:27:53,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 20:27:53,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599548116] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:27:53,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:27:53,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:27:53,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553487656] [2022-11-02 20:27:53,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:27:53,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:27:53,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:53,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:27:53,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:27:53,400 INFO L87 Difference]: Start difference. First operand 1258 states and 1844 transitions. Second operand has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:27:54,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:54,413 INFO L93 Difference]: Finished difference Result 2355 states and 3821 transitions. [2022-11-02 20:27:54,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:27:54,414 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-11-02 20:27:54,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:54,442 INFO L225 Difference]: With dead ends: 2355 [2022-11-02 20:27:54,442 INFO L226 Difference]: Without dead ends: 2338 [2022-11-02 20:27:54,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=1009, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:27:54,448 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 235 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:54,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 161 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:27:54,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2022-11-02 20:27:54,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 1753. [2022-11-02 20:27:54,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1280 states have (on average 1.16484375) internal successors, (1491), 1338 states have internal predecessors, (1491), 308 states have call successors, (308), 82 states have call predecessors, (308), 160 states have return successors, (829), 332 states have call predecessors, (829), 300 states have call successors, (829) [2022-11-02 20:27:54,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2628 transitions. [2022-11-02 20:27:54,697 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2628 transitions. Word has length 36 [2022-11-02 20:27:54,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:54,698 INFO L495 AbstractCegarLoop]: Abstraction has 1753 states and 2628 transitions. [2022-11-02 20:27:54,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:27:54,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2628 transitions. [2022-11-02 20:27:54,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 20:27:54,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:54,700 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:54,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:27:54,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:27:54,914 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:27:54,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:54,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1699542727, now seen corresponding path program 1 times [2022-11-02 20:27:54,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:54,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464281044] [2022-11-02 20:27:54,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:54,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:54,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:27:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:55,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:27:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:27:55,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:55,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464281044] [2022-11-02 20:27:55,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464281044] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:55,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457307942] [2022-11-02 20:27:55,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:55,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:55,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:55,053 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:55,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:27:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:55,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:27:55,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:27:55,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:27:55,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457307942] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:55,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:27:55,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2022-11-02 20:27:55,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744964535] [2022-11-02 20:27:55,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:27:55,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:27:55,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:55,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:27:55,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:27:55,428 INFO L87 Difference]: Start difference. First operand 1753 states and 2628 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:27:55,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:55,939 INFO L93 Difference]: Finished difference Result 1910 states and 3114 transitions. [2022-11-02 20:27:55,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:27:55,940 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-11-02 20:27:55,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:55,956 INFO L225 Difference]: With dead ends: 1910 [2022-11-02 20:27:55,956 INFO L226 Difference]: Without dead ends: 1909 [2022-11-02 20:27:55,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:27:55,959 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 60 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:55,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 168 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:27:55,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2022-11-02 20:27:56,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1734. [2022-11-02 20:27:56,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1271 states have (on average 1.163650668764752) internal successors, (1479), 1329 states have internal predecessors, (1479), 305 states have call successors, (305), 82 states have call predecessors, (305), 153 states have return successors, (696), 322 states have call predecessors, (696), 297 states have call successors, (696) [2022-11-02 20:27:56,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2480 transitions. [2022-11-02 20:27:56,180 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2480 transitions. Word has length 37 [2022-11-02 20:27:56,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:56,181 INFO L495 AbstractCegarLoop]: Abstraction has 1734 states and 2480 transitions. [2022-11-02 20:27:56,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:27:56,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2480 transitions. [2022-11-02 20:27:56,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-02 20:27:56,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:56,184 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:56,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:27:56,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:56,411 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:27:56,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:56,412 INFO L85 PathProgramCache]: Analyzing trace with hash 865218898, now seen corresponding path program 1 times [2022-11-02 20:27:56,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:56,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447763025] [2022-11-02 20:27:56,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:56,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:56,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:27:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:56,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:27:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:56,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:27:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:27:56,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:56,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447763025] [2022-11-02 20:27:56,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447763025] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:56,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570191098] [2022-11-02 20:27:56,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:56,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:56,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:56,515 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:56,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:27:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:56,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:27:56,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-02 20:27:56,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:56,798 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-02 20:27:56,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570191098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:27:56,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:27:56,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2022-11-02 20:27:56,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395038345] [2022-11-02 20:27:56,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:27:56,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:27:56,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:56,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:27:56,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:27:56,801 INFO L87 Difference]: Start difference. First operand 1734 states and 2480 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-02 20:27:57,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:57,080 INFO L93 Difference]: Finished difference Result 2467 states and 3685 transitions. [2022-11-02 20:27:57,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:27:57,081 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 43 [2022-11-02 20:27:57,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:57,088 INFO L225 Difference]: With dead ends: 2467 [2022-11-02 20:27:57,088 INFO L226 Difference]: Without dead ends: 869 [2022-11-02 20:27:57,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:27:57,102 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 95 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:57,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 103 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:27:57,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-11-02 20:27:57,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 850. [2022-11-02 20:27:57,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 633 states have (on average 1.1342812006319116) internal successors, (718), 653 states have internal predecessors, (718), 153 states have call successors, (153), 46 states have call predecessors, (153), 60 states have return successors, (244), 150 states have call predecessors, (244), 149 states have call successors, (244) [2022-11-02 20:27:57,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1115 transitions. [2022-11-02 20:27:57,234 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1115 transitions. Word has length 43 [2022-11-02 20:27:57,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:57,235 INFO L495 AbstractCegarLoop]: Abstraction has 850 states and 1115 transitions. [2022-11-02 20:27:57,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-02 20:27:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1115 transitions. [2022-11-02 20:27:57,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-02 20:27:57,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:57,237 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:57,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:27:57,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:57,450 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:27:57,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:57,451 INFO L85 PathProgramCache]: Analyzing trace with hash -151680771, now seen corresponding path program 2 times [2022-11-02 20:27:57,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:57,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044197684] [2022-11-02 20:27:57,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:57,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:57,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:57,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044197684] [2022-11-02 20:27:57,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044197684] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:57,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693038453] [2022-11-02 20:27:57,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:27:57,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:57,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:57,637 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:57,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:27:57,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:27:57,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:27:57,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:27:57,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:57,771 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:57,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:58,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693038453] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:27:58,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:27:58,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-11-02 20:27:58,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862083582] [2022-11-02 20:27:58,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:27:58,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:27:58,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:58,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:27:58,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:27:58,026 INFO L87 Difference]: Start difference. First operand 850 states and 1115 transitions. Second operand has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:27:58,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:58,875 INFO L93 Difference]: Finished difference Result 1623 states and 2347 transitions. [2022-11-02 20:27:58,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:27:58,876 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-02 20:27:58,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:58,887 INFO L225 Difference]: With dead ends: 1623 [2022-11-02 20:27:58,887 INFO L226 Difference]: Without dead ends: 1622 [2022-11-02 20:27:58,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 20:27:58,889 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 448 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:58,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 383 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:27:58,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2022-11-02 20:27:59,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1510. [2022-11-02 20:27:59,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1125 states have (on average 1.1075555555555556) internal successors, (1246), 1157 states have internal predecessors, (1246), 273 states have call successors, (273), 82 states have call predecessors, (273), 108 states have return successors, (436), 270 states have call predecessors, (436), 269 states have call successors, (436) [2022-11-02 20:27:59,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 1955 transitions. [2022-11-02 20:27:59,081 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 1955 transitions. Word has length 44 [2022-11-02 20:27:59,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:59,081 INFO L495 AbstractCegarLoop]: Abstraction has 1510 states and 1955 transitions. [2022-11-02 20:27:59,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:27:59,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 1955 transitions. [2022-11-02 20:27:59,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-02 20:27:59,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:59,085 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:27:59,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:27:59,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:27:59,306 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:27:59,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:59,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1560392739, now seen corresponding path program 2 times [2022-11-02 20:27:59,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:59,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974760550] [2022-11-02 20:27:59,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:59,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:59,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:27:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:59,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:27:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:27:59,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:59,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974760550] [2022-11-02 20:27:59,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974760550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:59,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805859145] [2022-11-02 20:27:59,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:27:59,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:59,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:59,493 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:59,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:27:59,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:27:59,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:27:59,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:27:59,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:27:59,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:27:59,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805859145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:27:59,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:27:59,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-11-02 20:27:59,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781553479] [2022-11-02 20:27:59,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:27:59,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 20:27:59,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:59,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 20:27:59,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:27:59,957 INFO L87 Difference]: Start difference. First operand 1510 states and 1955 transitions. Second operand has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-02 20:28:01,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:01,671 INFO L93 Difference]: Finished difference Result 3056 states and 4731 transitions. [2022-11-02 20:28:01,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-02 20:28:01,672 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 45 [2022-11-02 20:28:01,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:01,689 INFO L225 Difference]: With dead ends: 3056 [2022-11-02 20:28:01,690 INFO L226 Difference]: Without dead ends: 2163 [2022-11-02 20:28:01,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=504, Invalid=1752, Unknown=0, NotChecked=0, Total=2256 [2022-11-02 20:28:01,701 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 238 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:01,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 258 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:28:01,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2022-11-02 20:28:01,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1621. [2022-11-02 20:28:01,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1208 states have (on average 1.1018211920529801) internal successors, (1331), 1240 states have internal predecessors, (1331), 292 states have call successors, (292), 91 states have call predecessors, (292), 117 states have return successors, (461), 289 states have call predecessors, (461), 288 states have call successors, (461) [2022-11-02 20:28:01,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2084 transitions. [2022-11-02 20:28:01,937 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2084 transitions. Word has length 45 [2022-11-02 20:28:01,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:01,937 INFO L495 AbstractCegarLoop]: Abstraction has 1621 states and 2084 transitions. [2022-11-02 20:28:01,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-02 20:28:01,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2084 transitions. [2022-11-02 20:28:01,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 20:28:01,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:01,939 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:01,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:28:02,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:28:02,162 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:28:02,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:02,163 INFO L85 PathProgramCache]: Analyzing trace with hash 442862615, now seen corresponding path program 1 times [2022-11-02 20:28:02,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:02,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572062487] [2022-11-02 20:28:02,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:02,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:02,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:28:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:02,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:28:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:02,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:28:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:02,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-02 20:28:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-02 20:28:02,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:02,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572062487] [2022-11-02 20:28:02,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572062487] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:28:02,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749287292] [2022-11-02 20:28:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:02,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:02,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:02,515 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:28:02,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:28:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:02,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:28:02,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:28:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 20:28:02,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:28:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-02 20:28:03,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749287292] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:28:03,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:28:03,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-11-02 20:28:03,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074043822] [2022-11-02 20:28:03,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:28:03,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 20:28:03,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:03,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 20:28:03,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:28:03,286 INFO L87 Difference]: Start difference. First operand 1621 states and 2084 transitions. Second operand has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-02 20:28:05,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:05,694 INFO L93 Difference]: Finished difference Result 4064 states and 7465 transitions. [2022-11-02 20:28:05,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-02 20:28:05,695 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 52 [2022-11-02 20:28:05,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:05,737 INFO L225 Difference]: With dead ends: 4064 [2022-11-02 20:28:05,737 INFO L226 Difference]: Without dead ends: 4060 [2022-11-02 20:28:05,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2022-11-02 20:28:05,743 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 144 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:05,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 244 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 20:28:05,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4060 states. [2022-11-02 20:28:06,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4060 to 2916. [2022-11-02 20:28:06,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2015 states have (on average 1.078908188585608) internal successors, (2174), 2047 states have internal predecessors, (2174), 557 states have call successors, (557), 105 states have call predecessors, (557), 340 states have return successors, (3218), 763 states have call predecessors, (3218), 551 states have call successors, (3218) [2022-11-02 20:28:06,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 5949 transitions. [2022-11-02 20:28:06,227 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 5949 transitions. Word has length 52 [2022-11-02 20:28:06,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:06,227 INFO L495 AbstractCegarLoop]: Abstraction has 2916 states and 5949 transitions. [2022-11-02 20:28:06,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-02 20:28:06,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 5949 transitions. [2022-11-02 20:28:06,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-02 20:28:06,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:06,231 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:06,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:28:06,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:06,442 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:28:06,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:06,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1991697283, now seen corresponding path program 1 times [2022-11-02 20:28:06,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:06,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162827834] [2022-11-02 20:28:06,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:06,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:06,695 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:28:06,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:06,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162827834] [2022-11-02 20:28:06,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162827834] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:28:06,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301572117] [2022-11-02 20:28:06,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:06,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:06,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:06,698 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:28:06,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:28:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:06,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 20:28:06,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:28:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:28:06,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:28:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:28:07,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301572117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:28:07,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:28:07,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-11-02 20:28:07,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557938894] [2022-11-02 20:28:07,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:28:07,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:28:07,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:07,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:28:07,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:28:07,148 INFO L87 Difference]: Start difference. First operand 2916 states and 5949 transitions. Second operand has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:08,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:08,923 INFO L93 Difference]: Finished difference Result 7961 states and 16550 transitions. [2022-11-02 20:28:08,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:28:08,926 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-02 20:28:08,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:09,024 INFO L225 Difference]: With dead ends: 7961 [2022-11-02 20:28:09,024 INFO L226 Difference]: Without dead ends: 7960 [2022-11-02 20:28:09,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 20:28:09,031 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 556 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:09,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 349 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:28:09,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7960 states. [2022-11-02 20:28:10,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7960 to 7884. [2022-11-02 20:28:10,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7884 states, 5489 states have (on average 1.0814355984696666) internal successors, (5936), 5593 states have internal predecessors, (5936), 1505 states have call successors, (1505), 303 states have call predecessors, (1505), 886 states have return successors, (8678), 1987 states have call predecessors, (8678), 1499 states have call successors, (8678) [2022-11-02 20:28:10,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7884 states to 7884 states and 16119 transitions. [2022-11-02 20:28:10,445 INFO L78 Accepts]: Start accepts. Automaton has 7884 states and 16119 transitions. Word has length 58 [2022-11-02 20:28:10,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:10,446 INFO L495 AbstractCegarLoop]: Abstraction has 7884 states and 16119 transitions. [2022-11-02 20:28:10,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:10,447 INFO L276 IsEmpty]: Start isEmpty. Operand 7884 states and 16119 transitions. [2022-11-02 20:28:10,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-02 20:28:10,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:10,451 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:10,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:28:10,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:10,678 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:28:10,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:10,679 INFO L85 PathProgramCache]: Analyzing trace with hash 526800899, now seen corresponding path program 1 times [2022-11-02 20:28:10,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:10,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960345209] [2022-11-02 20:28:10,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:10,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:10,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:28:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:10,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:28:10,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:10,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:28:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:11,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-02 20:28:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-02 20:28:11,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:11,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960345209] [2022-11-02 20:28:11,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960345209] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:28:11,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007003307] [2022-11-02 20:28:11,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:11,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:11,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:11,074 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:28:11,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:28:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:11,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:28:11,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:28:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 20:28:11,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:28:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-02 20:28:11,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007003307] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:28:11,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:28:11,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-11-02 20:28:11,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119815709] [2022-11-02 20:28:11,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:28:11,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 20:28:11,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:11,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 20:28:11,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:28:11,907 INFO L87 Difference]: Start difference. First operand 7884 states and 16119 transitions. Second operand has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-02 20:28:15,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:15,845 INFO L93 Difference]: Finished difference Result 27422 states and 98822 transitions. [2022-11-02 20:28:15,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:28:15,845 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2022-11-02 20:28:15,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:16,340 INFO L225 Difference]: With dead ends: 27422 [2022-11-02 20:28:16,341 INFO L226 Difference]: Without dead ends: 20893 [2022-11-02 20:28:16,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=906, Invalid=3516, Unknown=0, NotChecked=0, Total=4422 [2022-11-02 20:28:16,743 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 133 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:16,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 317 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:28:16,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20893 states. [2022-11-02 20:28:20,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20893 to 16604. [2022-11-02 20:28:20,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16604 states, 10900 states have (on average 1.0543119266055045) internal successors, (11492), 10965 states have internal predecessors, (11492), 3293 states have call successors, (3293), 380 states have call predecessors, (3293), 2407 states have return successors, (45164), 5258 states have call predecessors, (45164), 3282 states have call successors, (45164) [2022-11-02 20:28:21,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16604 states to 16604 states and 59949 transitions. [2022-11-02 20:28:21,549 INFO L78 Accepts]: Start accepts. Automaton has 16604 states and 59949 transitions. Word has length 56 [2022-11-02 20:28:21,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:21,550 INFO L495 AbstractCegarLoop]: Abstraction has 16604 states and 59949 transitions. [2022-11-02 20:28:21,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-02 20:28:21,551 INFO L276 IsEmpty]: Start isEmpty. Operand 16604 states and 59949 transitions. [2022-11-02 20:28:21,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-02 20:28:21,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:21,554 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:21,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:28:21,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:21,778 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:28:21,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:21,779 INFO L85 PathProgramCache]: Analyzing trace with hash 55857866, now seen corresponding path program 2 times [2022-11-02 20:28:21,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:21,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378747599] [2022-11-02 20:28:21,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:21,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:21,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:28:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:22,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:28:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:22,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:28:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:22,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:28:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:22,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-02 20:28:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-02 20:28:22,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:22,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378747599] [2022-11-02 20:28:22,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378747599] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:28:22,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457429497] [2022-11-02 20:28:22,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:28:22,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:22,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:22,539 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:28:22,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:28:22,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:28:22,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:28:22,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:28:22,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:28:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 23 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-02 20:28:22,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:28:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 80 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-02 20:28:23,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457429497] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:28:23,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:28:23,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2022-11-02 20:28:23,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266213142] [2022-11-02 20:28:23,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:28:23,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 20:28:23,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:23,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 20:28:23,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:28:23,913 INFO L87 Difference]: Start difference. First operand 16604 states and 59949 transitions. Second operand has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-02 20:28:27,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:27,054 INFO L93 Difference]: Finished difference Result 25458 states and 94365 transitions. [2022-11-02 20:28:27,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-02 20:28:27,057 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 73 [2022-11-02 20:28:27,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:27,164 INFO L225 Difference]: With dead ends: 25458 [2022-11-02 20:28:27,165 INFO L226 Difference]: Without dead ends: 10209 [2022-11-02 20:28:27,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=667, Invalid=2639, Unknown=0, NotChecked=0, Total=3306 [2022-11-02 20:28:27,478 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 178 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:27,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 378 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:28:27,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10209 states. [2022-11-02 20:28:28,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10209 to 9706. [2022-11-02 20:28:28,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9706 states, 6743 states have (on average 1.0793415393741659) internal successors, (7278), 6950 states have internal predecessors, (7278), 1900 states have call successors, (1900), 404 states have call predecessors, (1900), 1059 states have return successors, (6461), 2351 states have call predecessors, (6461), 1892 states have call successors, (6461) [2022-11-02 20:28:29,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9706 states to 9706 states and 15639 transitions. [2022-11-02 20:28:29,023 INFO L78 Accepts]: Start accepts. Automaton has 9706 states and 15639 transitions. Word has length 73 [2022-11-02 20:28:29,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:29,024 INFO L495 AbstractCegarLoop]: Abstraction has 9706 states and 15639 transitions. [2022-11-02 20:28:29,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-02 20:28:29,025 INFO L276 IsEmpty]: Start isEmpty. Operand 9706 states and 15639 transitions. [2022-11-02 20:28:29,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-02 20:28:29,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:29,030 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:29,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:28:29,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:29,250 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:28:29,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:29,251 INFO L85 PathProgramCache]: Analyzing trace with hash -131434271, now seen corresponding path program 3 times [2022-11-02 20:28:29,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:29,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350164134] [2022-11-02 20:28:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:29,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:29,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:28:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:29,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:28:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:28:29,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:29,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350164134] [2022-11-02 20:28:29,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350164134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:28:29,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392243012] [2022-11-02 20:28:29,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:28:29,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:29,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:29,637 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:28:29,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:28:29,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-02 20:28:29,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:28:29,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:28:29,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:28:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:28:30,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:28:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 65 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:28:30,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392243012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:28:30,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:28:30,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-11-02 20:28:30,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821923430] [2022-11-02 20:28:30,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:28:30,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:28:30,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:30,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:28:30,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:28:30,544 INFO L87 Difference]: Start difference. First operand 9706 states and 15639 transitions. Second operand has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-02 20:28:32,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:32,216 INFO L93 Difference]: Finished difference Result 10357 states and 16637 transitions. [2022-11-02 20:28:32,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:28:32,217 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2022-11-02 20:28:32,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:32,271 INFO L225 Difference]: With dead ends: 10357 [2022-11-02 20:28:32,272 INFO L226 Difference]: Without dead ends: 10356 [2022-11-02 20:28:32,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=573, Invalid=1977, Unknown=0, NotChecked=0, Total=2550 [2022-11-02 20:28:32,287 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 230 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:32,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 232 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:28:32,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10356 states. [2022-11-02 20:28:33,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10356 to 9814. [2022-11-02 20:28:33,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9814 states, 6815 states have (on average 1.074688187820983) internal successors, (7324), 7022 states have internal predecessors, (7324), 1900 states have call successors, (1900), 404 states have call predecessors, (1900), 1095 states have return successors, (6555), 2387 states have call predecessors, (6555), 1892 states have call successors, (6555) [2022-11-02 20:28:33,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9814 states to 9814 states and 15779 transitions. [2022-11-02 20:28:33,848 INFO L78 Accepts]: Start accepts. Automaton has 9814 states and 15779 transitions. Word has length 69 [2022-11-02 20:28:33,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:33,849 INFO L495 AbstractCegarLoop]: Abstraction has 9814 states and 15779 transitions. [2022-11-02 20:28:33,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-02 20:28:33,850 INFO L276 IsEmpty]: Start isEmpty. Operand 9814 states and 15779 transitions. [2022-11-02 20:28:33,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-02 20:28:33,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:33,855 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:33,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:28:34,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-02 20:28:34,071 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:28:34,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:34,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1597804450, now seen corresponding path program 2 times [2022-11-02 20:28:34,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:34,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912539977] [2022-11-02 20:28:34,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:34,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:34,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 20:28:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:34,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:28:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:34,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:28:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:34,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:28:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:34,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:28:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:34,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-02 20:28:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:34,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 20:28:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 98 proven. 28 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-02 20:28:34,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:34,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912539977] [2022-11-02 20:28:34,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912539977] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:28:34,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254594800] [2022-11-02 20:28:34,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:28:34,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:34,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:34,476 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:28:34,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:28:34,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:28:34,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:28:34,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:28:34,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:28:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 100 proven. 15 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-02 20:28:34,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:28:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 100 proven. 26 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-02 20:28:35,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254594800] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:28:35,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:28:35,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 8] total 14 [2022-11-02 20:28:35,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499946639] [2022-11-02 20:28:35,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:28:35,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:28:35,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:35,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:28:35,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:28:35,327 INFO L87 Difference]: Start difference. First operand 9814 states and 15779 transitions. Second operand has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 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) [2022-11-02 20:28:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:36,376 INFO L93 Difference]: Finished difference Result 18932 states and 34355 transitions. [2022-11-02 20:28:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:28:36,377 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) Word has length 88 [2022-11-02 20:28:36,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:36,448 INFO L225 Difference]: With dead ends: 18932 [2022-11-02 20:28:36,448 INFO L226 Difference]: Without dead ends: 10758 [2022-11-02 20:28:36,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 182 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:28:36,510 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 104 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:36,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 85 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:28:36,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10758 states. [2022-11-02 20:28:37,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10758 to 9808. [2022-11-02 20:28:37,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9808 states, 6812 states have (on average 1.0747210804462712) internal successors, (7321), 7019 states have internal predecessors, (7321), 1897 states have call successors, (1897), 404 states have call predecessors, (1897), 1095 states have return successors, (6475), 2384 states have call predecessors, (6475), 1862 states have call successors, (6475) [2022-11-02 20:28:37,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9808 states to 9808 states and 15693 transitions. [2022-11-02 20:28:37,995 INFO L78 Accepts]: Start accepts. Automaton has 9808 states and 15693 transitions. Word has length 88 [2022-11-02 20:28:37,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:37,995 INFO L495 AbstractCegarLoop]: Abstraction has 9808 states and 15693 transitions. [2022-11-02 20:28:37,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 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) [2022-11-02 20:28:37,996 INFO L276 IsEmpty]: Start isEmpty. Operand 9808 states and 15693 transitions. [2022-11-02 20:28:38,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-02 20:28:38,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:38,001 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:38,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:28:38,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-02 20:28:38,214 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:28:38,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:38,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1897499616, now seen corresponding path program 3 times [2022-11-02 20:28:38,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:38,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067225908] [2022-11-02 20:28:38,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:38,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:38,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:28:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:38,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:28:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:38,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:28:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:38,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:28:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:38,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:28:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:38,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:28:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:38,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-02 20:28:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:38,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-02 20:28:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:38,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:28:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 113 proven. 51 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-02 20:28:38,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:38,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067225908] [2022-11-02 20:28:38,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067225908] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:28:38,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128423475] [2022-11-02 20:28:38,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:28:38,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:38,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:38,712 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:28:38,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:28:38,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-02 20:28:38,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:28:38,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:28:38,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:28:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 150 proven. 26 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-02 20:28:38,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:28:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 119 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-02 20:28:40,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128423475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:28:40,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:28:40,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 17 [2022-11-02 20:28:40,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30643791] [2022-11-02 20:28:40,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:28:40,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:28:40,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:40,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:28:40,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:28:40,069 INFO L87 Difference]: Start difference. First operand 9808 states and 15693 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) [2022-11-02 20:28:41,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:41,612 INFO L93 Difference]: Finished difference Result 20497 states and 41620 transitions. [2022-11-02 20:28:41,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:28:41,613 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 99 [2022-11-02 20:28:41,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:41,695 INFO L225 Difference]: With dead ends: 20497 [2022-11-02 20:28:41,696 INFO L226 Difference]: Without dead ends: 12358 [2022-11-02 20:28:41,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 206 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:28:41,767 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 85 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:41,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 157 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:28:41,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12358 states. [2022-11-02 20:28:43,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12358 to 11997. [2022-11-02 20:28:43,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11997 states, 8101 states have (on average 1.054684606838662) internal successors, (8544), 8288 states have internal predecessors, (8544), 2417 states have call successors, (2417), 424 states have call predecessors, (2417), 1475 states have return successors, (8115), 3284 states have call predecessors, (8115), 2362 states have call successors, (8115) [2022-11-02 20:28:43,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11997 states to 11997 states and 19076 transitions. [2022-11-02 20:28:43,905 INFO L78 Accepts]: Start accepts. Automaton has 11997 states and 19076 transitions. Word has length 99 [2022-11-02 20:28:43,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:43,906 INFO L495 AbstractCegarLoop]: Abstraction has 11997 states and 19076 transitions. [2022-11-02 20:28:43,906 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) [2022-11-02 20:28:43,906 INFO L276 IsEmpty]: Start isEmpty. Operand 11997 states and 19076 transitions. [2022-11-02 20:28:43,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-02 20:28:43,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:43,915 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 7, 7, 7, 6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:43,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-02 20:28:44,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:44,130 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:28:44,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:44,131 INFO L85 PathProgramCache]: Analyzing trace with hash -127918165, now seen corresponding path program 3 times [2022-11-02 20:28:44,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:44,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660452851] [2022-11-02 20:28:44,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:44,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:44,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:28:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:44,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:28:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:44,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:28:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:44,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-02 20:28:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 122 proven. 90 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-02 20:28:44,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:44,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660452851] [2022-11-02 20:28:44,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660452851] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:28:44,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816304081] [2022-11-02 20:28:44,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:28:44,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:44,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:44,606 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:28:44,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 20:28:44,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-02 20:28:44,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:28:44,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-02 20:28:44,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:28:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 119 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-02 20:28:44,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:28:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-02 20:28:45,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816304081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:28:45,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:28:45,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2022-11-02 20:28:45,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126601466] [2022-11-02 20:28:45,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:28:45,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 20:28:45,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:45,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 20:28:45,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:28:45,184 INFO L87 Difference]: Start difference. First operand 11997 states and 19076 transitions. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-02 20:28:48,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:48,044 INFO L93 Difference]: Finished difference Result 20852 states and 35642 transitions. [2022-11-02 20:28:48,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-02 20:28:48,045 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 88 [2022-11-02 20:28:48,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:48,104 INFO L225 Difference]: With dead ends: 20852 [2022-11-02 20:28:48,104 INFO L226 Difference]: Without dead ends: 10359 [2022-11-02 20:28:48,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=983, Invalid=3439, Unknown=0, NotChecked=0, Total=4422 [2022-11-02 20:28:48,202 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 203 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:48,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 145 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:28:48,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10359 states. [2022-11-02 20:28:49,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10359 to 8741. [2022-11-02 20:28:49,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8741 states, 5968 states have (on average 1.0464142091152815) internal successors, (6245), 6144 states have internal predecessors, (6245), 1711 states have call successors, (1711), 352 states have call predecessors, (1711), 1058 states have return successors, (4097), 2244 states have call predecessors, (4097), 1677 states have call successors, (4097) [2022-11-02 20:28:49,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8741 states to 8741 states and 12053 transitions. [2022-11-02 20:28:49,642 INFO L78 Accepts]: Start accepts. Automaton has 8741 states and 12053 transitions. Word has length 88 [2022-11-02 20:28:49,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:49,643 INFO L495 AbstractCegarLoop]: Abstraction has 8741 states and 12053 transitions. [2022-11-02 20:28:49,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-02 20:28:49,643 INFO L276 IsEmpty]: Start isEmpty. Operand 8741 states and 12053 transitions. [2022-11-02 20:28:49,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-02 20:28:49,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:49,648 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:49,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:28:49,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-02 20:28:49,874 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:28:49,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:49,875 INFO L85 PathProgramCache]: Analyzing trace with hash -635779733, now seen corresponding path program 4 times [2022-11-02 20:28:49,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:49,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523952157] [2022-11-02 20:28:49,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:49,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:50,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:28:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:50,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:28:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:50,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:28:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:50,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:28:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:50,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:28:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:50,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-02 20:28:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:50,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 20:28:50,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:50,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-02 20:28:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 51 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-02 20:28:50,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:50,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523952157] [2022-11-02 20:28:50,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523952157] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:28:50,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647666484] [2022-11-02 20:28:50,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:28:50,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:50,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:50,540 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:28:50,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-02 20:28:50,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:28:50,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:28:50,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 20:28:50,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:28:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 67 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-02 20:28:50,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:28:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 42 proven. 89 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-02 20:28:52,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647666484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:28:52,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:28:52,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2022-11-02 20:28:52,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405188444] [2022-11-02 20:28:52,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:28:52,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-02 20:28:52,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:52,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-02 20:28:52,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 20:28:52,984 INFO L87 Difference]: Start difference. First operand 8741 states and 12053 transitions. Second operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2022-11-02 20:29:00,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:29:00,510 INFO L93 Difference]: Finished difference Result 29169 states and 46148 transitions. [2022-11-02 20:29:00,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-11-02 20:29:00,510 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) Word has length 90 [2022-11-02 20:29:00,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:29:00,697 INFO L225 Difference]: With dead ends: 29169 [2022-11-02 20:29:00,698 INFO L226 Difference]: Without dead ends: 28067 [2022-11-02 20:29:00,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12288 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5454, Invalid=27126, Unknown=0, NotChecked=0, Total=32580 [2022-11-02 20:29:00,739 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 260 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 1195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 2315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1195 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:29:00,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 275 Invalid, 2315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1195 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-02 20:29:00,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28067 states. [2022-11-02 20:29:03,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28067 to 17311. [2022-11-02 20:29:03,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17311 states, 11232 states have (on average 1.0269764957264957) internal successors, (11535), 11391 states have internal predecessors, (11535), 3626 states have call successors, (3626), 460 states have call predecessors, (3626), 2449 states have return successors, (11770), 5459 states have call predecessors, (11770), 3572 states have call successors, (11770) [2022-11-02 20:29:03,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17311 states to 17311 states and 26931 transitions. [2022-11-02 20:29:03,163 INFO L78 Accepts]: Start accepts. Automaton has 17311 states and 26931 transitions. Word has length 90 [2022-11-02 20:29:03,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:29:03,163 INFO L495 AbstractCegarLoop]: Abstraction has 17311 states and 26931 transitions. [2022-11-02 20:29:03,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2022-11-02 20:29:03,164 INFO L276 IsEmpty]: Start isEmpty. Operand 17311 states and 26931 transitions. [2022-11-02 20:29:03,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:29:03,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:29:03,168 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2022-11-02 20:29:03,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:29:03,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-02 20:29:03,382 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:29:03,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:29:03,383 INFO L85 PathProgramCache]: Analyzing trace with hash 147414137, now seen corresponding path program 3 times [2022-11-02 20:29:03,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:29:03,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656832291] [2022-11-02 20:29:03,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:03,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:29:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:29:03,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:29:03,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656832291] [2022-11-02 20:29:03,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656832291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:29:03,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771928795] [2022-11-02 20:29:03,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:29:03,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:29:03,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:29:03,860 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:29:03,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-02 20:29:04,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-02 20:29:04,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:29:04,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 20:29:04,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:29:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:29:04,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:29:04,868 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:29:04,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771928795] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:29:04,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:29:04,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-11-02 20:29:04,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191683637] [2022-11-02 20:29:04,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:29:04,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-02 20:29:04,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:29:04,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-02 20:29:04,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-11-02 20:29:04,871 INFO L87 Difference]: Start difference. First operand 17311 states and 26931 transitions. Second operand has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:09,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:29:09,595 INFO L93 Difference]: Finished difference Result 28628 states and 44547 transitions. [2022-11-02 20:29:09,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-02 20:29:09,596 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-02 20:29:09,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:29:09,762 INFO L225 Difference]: With dead ends: 28628 [2022-11-02 20:29:09,762 INFO L226 Difference]: Without dead ends: 28627 [2022-11-02 20:29:09,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2022-11-02 20:29:09,778 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 927 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:29:09,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [931 Valid, 669 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 20:29:09,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28627 states. [2022-11-02 20:29:13,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28627 to 28627. [2022-11-02 20:29:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28627 states, 18540 states have (on average 1.0279935275080907) internal successors, (19059), 18915 states have internal predecessors, (19059), 5846 states have call successors, (5846), 676 states have call predecessors, (5846), 4237 states have return successors, (19630), 9035 states have call predecessors, (19630), 5792 states have call successors, (19630) [2022-11-02 20:29:13,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28627 states to 28627 states and 44535 transitions. [2022-11-02 20:29:13,478 INFO L78 Accepts]: Start accepts. Automaton has 28627 states and 44535 transitions. Word has length 92 [2022-11-02 20:29:13,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:29:13,479 INFO L495 AbstractCegarLoop]: Abstraction has 28627 states and 44535 transitions. [2022-11-02 20:29:13,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:13,479 INFO L276 IsEmpty]: Start isEmpty. Operand 28627 states and 44535 transitions. [2022-11-02 20:29:13,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-02 20:29:13,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:29:13,495 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2022-11-02 20:29:13,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-02 20:29:13,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-02 20:29:13,710 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:29:13,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:29:13,710 INFO L85 PathProgramCache]: Analyzing trace with hash -570444405, now seen corresponding path program 2 times [2022-11-02 20:29:13,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:29:13,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079692043] [2022-11-02 20:29:13,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:13,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:29:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 20:29:14,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:29:14,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079692043] [2022-11-02 20:29:14,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079692043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:29:14,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026931720] [2022-11-02 20:29:14,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:29:14,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:29:14,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:29:14,755 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:29:14,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-02 20:29:14,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:29:14,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:29:14,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-02 20:29:14,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:29:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 20:29:15,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:29:15,948 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 20:29:15,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026931720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:29:15,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:29:15,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-11-02 20:29:15,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732383996] [2022-11-02 20:29:15,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:29:15,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-02 20:29:15,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:29:15,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-02 20:29:15,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-11-02 20:29:15,952 INFO L87 Difference]: Start difference. First operand 28627 states and 44535 transitions. Second operand has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:24,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:29:24,329 INFO L93 Difference]: Finished difference Result 64728 states and 101341 transitions. [2022-11-02 20:29:24,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-02 20:29:24,330 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2022-11-02 20:29:24,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:29:24,617 INFO L225 Difference]: With dead ends: 64728 [2022-11-02 20:29:24,617 INFO L226 Difference]: Without dead ends: 64727 [2022-11-02 20:29:24,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2022-11-02 20:29:24,645 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1728 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 646 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1731 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 646 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:29:24,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1731 Valid, 576 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [646 Valid, 1065 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:29:24,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64727 states. [2022-11-02 20:29:32,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64727 to 64675. [2022-11-02 20:29:32,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64675 states, 41976 states have (on average 1.028659233847913) internal successors, (43179), 42843 states have internal predecessors, (43179), 13190 states have call successors, (13190), 1564 states have call predecessors, (13190), 9505 states have return successors, (44950), 20267 states have call predecessors, (44950), 13076 states have call successors, (44950) [2022-11-02 20:29:33,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64675 states to 64675 states and 101319 transitions. [2022-11-02 20:29:33,120 INFO L78 Accepts]: Start accepts. Automaton has 64675 states and 101319 transitions. Word has length 142 [2022-11-02 20:29:33,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:29:33,121 INFO L495 AbstractCegarLoop]: Abstraction has 64675 states and 101319 transitions. [2022-11-02 20:29:33,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:33,122 INFO L276 IsEmpty]: Start isEmpty. Operand 64675 states and 101319 transitions. [2022-11-02 20:29:33,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-11-02 20:29:33,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:29:33,141 INFO L195 NwaCegarLoop]: trace histogram [30, 23, 19, 19, 19, 18, 18, 18, 17, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-02 20:29:33,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-02 20:29:33,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-02 20:29:33,354 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-02 20:29:33,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:29:33,355 INFO L85 PathProgramCache]: Analyzing trace with hash -282064003, now seen corresponding path program 1 times [2022-11-02 20:29:33,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:29:33,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722933276] [2022-11-02 20:29:33,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:33,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:29:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:34,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-02 20:29:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:34,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:29:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:34,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:29:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:34,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:29:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:34,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:29:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:34,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:29:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:34,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-02 20:29:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:34,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-02 20:29:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:35,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:29:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:35,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:29:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:35,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:29:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:35,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:29:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:35,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:29:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:35,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-02 20:29:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:35,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 20:29:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:35,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-02 20:29:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:35,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-02 20:29:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2337 backedges. 786 proven. 224 refuted. 0 times theorem prover too weak. 1327 trivial. 0 not checked. [2022-11-02 20:29:35,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:29:35,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722933276] [2022-11-02 20:29:35,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722933276] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:29:35,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275174628] [2022-11-02 20:29:35,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:35,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:29:35,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:29:35,391 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:29:35,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57326eba-b541-4e25-98c0-5c5e097e12d4/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-02 20:29:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:35,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:29:35,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:29:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2337 backedges. 775 proven. 216 refuted. 0 times theorem prover too weak. 1346 trivial. 0 not checked. [2022-11-02 20:29:35,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:29:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2337 backedges. 791 proven. 263 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2022-11-02 20:29:38,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275174628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:29:38,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:29:38,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 21] total 28 [2022-11-02 20:29:38,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519155949] [2022-11-02 20:29:38,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:29:38,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:29:38,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:29:38,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:29:38,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:29:38,966 INFO L87 Difference]: Start difference. First operand 64675 states and 101319 transitions. Second operand has 28 states, 28 states have (on average 4.428571428571429) internal successors, (124), 25 states have internal predecessors, (124), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) [2022-11-02 20:29:50,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:29:50,479 INFO L93 Difference]: Finished difference Result 152847 states and 310280 transitions. [2022-11-02 20:29:50,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 20:29:50,480 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.428571428571429) internal successors, (124), 25 states have internal predecessors, (124), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) Word has length 265 [2022-11-02 20:29:50,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:29:51,120 INFO L225 Difference]: With dead ends: 152847 [2022-11-02 20:29:51,120 INFO L226 Difference]: Without dead ends: 94875 [2022-11-02 20:29:51,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 548 SyntacticMatches, 15 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=446, Invalid=1624, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 20:29:51,961 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 228 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:29:51,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 274 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:29:52,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94875 states.