./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 8393723b 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_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro --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-8393723 [2022-11-18 21:02:55,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 21:02:55,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 21:02:55,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 21:02:55,821 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 21:02:55,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 21:02:55,824 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 21:02:55,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 21:02:55,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 21:02:55,829 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 21:02:55,830 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 21:02:55,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 21:02:55,832 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 21:02:55,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 21:02:55,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 21:02:55,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 21:02:55,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 21:02:55,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 21:02:55,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 21:02:55,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 21:02:55,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 21:02:55,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 21:02:55,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 21:02:55,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 21:02:55,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 21:02:55,869 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 21:02:55,870 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 21:02:55,871 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 21:02:55,871 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 21:02:55,872 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 21:02:55,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 21:02:55,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 21:02:55,875 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 21:02:55,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 21:02:55,878 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 21:02:55,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 21:02:55,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 21:02:55,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 21:02:55,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 21:02:55,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 21:02:55,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 21:02:55,885 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-18 21:02:55,925 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 21:02:55,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 21:02:55,927 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 21:02:55,927 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 21:02:55,928 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 21:02:55,928 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 21:02:55,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 21:02:55,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 21:02:55,929 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 21:02:55,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 21:02:55,931 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 21:02:55,931 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 21:02:55,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 21:02:55,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 21:02:55,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 21:02:55,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 21:02:55,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 21:02:55,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 21:02:55,932 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-18 21:02:55,932 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 21:02:55,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 21:02:55,933 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 21:02:55,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 21:02:55,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 21:02:55,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 21:02:55,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 21:02:55,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:02:55,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 21:02:55,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 21:02:55,936 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 21:02:55,936 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 21:02:55,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 21:02:55,937 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 21:02:55,937 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 21:02:55,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 21:02:55,938 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_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20c02b81d1b1bc312ccc75d6e9b31c6252d69e8a6e2560afe3a2a95a3e53102a [2022-11-18 21:02:56,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 21:02:56,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 21:02:56,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 21:02:56,312 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 21:02:56,313 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 21:02:56,314 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/recursive/Ackermann02.c [2022-11-18 21:02:56,416 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/data/3039b9cc9/fb0459761feb4fb4b3536aa00cee8021/FLAG5afd13f78 [2022-11-18 21:02:57,074 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 21:02:57,075 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/sv-benchmarks/c/recursive/Ackermann02.c [2022-11-18 21:02:57,085 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/data/3039b9cc9/fb0459761feb4fb4b3536aa00cee8021/FLAG5afd13f78 [2022-11-18 21:02:57,430 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/data/3039b9cc9/fb0459761feb4fb4b3536aa00cee8021 [2022-11-18 21:02:57,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 21:02:57,437 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 21:02:57,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 21:02:57,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 21:02:57,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 21:02:57,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:02:57" (1/1) ... [2022-11-18 21:02:57,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@717c3486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:57, skipping insertion in model container [2022-11-18 21:02:57,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:02:57" (1/1) ... [2022-11-18 21:02:57,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 21:02:57,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 21:02:57,698 WARN L234 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_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/sv-benchmarks/c/recursive/Ackermann02.c[1157,1170] [2022-11-18 21:02:57,699 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:02:57,721 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 21:02:57,753 WARN L234 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_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/sv-benchmarks/c/recursive/Ackermann02.c[1157,1170] [2022-11-18 21:02:57,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:02:57,774 INFO L208 MainTranslator]: Completed translation [2022-11-18 21:02:57,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:57 WrapperNode [2022-11-18 21:02:57,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 21:02:57,777 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 21:02:57,778 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 21:02:57,778 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 21:02:57,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:57" (1/1) ... [2022-11-18 21:02:57,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:57" (1/1) ... [2022-11-18 21:02:57,816 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2022-11-18 21:02:57,817 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 21:02:57,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 21:02:57,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 21:02:57,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 21:02:57,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:57" (1/1) ... [2022-11-18 21:02:57,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:57" (1/1) ... [2022-11-18 21:02:57,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:57" (1/1) ... [2022-11-18 21:02:57,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:57" (1/1) ... [2022-11-18 21:02:57,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:57" (1/1) ... [2022-11-18 21:02:57,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:57" (1/1) ... [2022-11-18 21:02:57,836 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:57" (1/1) ... [2022-11-18 21:02:57,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:57" (1/1) ... [2022-11-18 21:02:57,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 21:02:57,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 21:02:57,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 21:02:57,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 21:02:57,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:57" (1/1) ... [2022-11-18 21:02:57,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:02:57,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:02:57,896 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 21:02:57,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 21:02:57,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 21:02:57,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 21:02:57,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 21:02:57,943 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2022-11-18 21:02:57,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2022-11-18 21:02:57,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 21:02:58,020 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 21:02:58,022 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 21:02:58,262 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 21:02:58,271 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 21:02:58,271 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-18 21:02:58,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:02:58 BoogieIcfgContainer [2022-11-18 21:02:58,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 21:02:58,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 21:02:58,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 21:02:58,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 21:02:58,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:02:57" (1/3) ... [2022-11-18 21:02:58,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dbf9256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:02:58, skipping insertion in model container [2022-11-18 21:02:58,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:57" (2/3) ... [2022-11-18 21:02:58,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dbf9256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:02:58, skipping insertion in model container [2022-11-18 21:02:58,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:02:58" (3/3) ... [2022-11-18 21:02:58,286 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann02.c [2022-11-18 21:02:58,307 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 21:02:58,308 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-18 21:02:58,389 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 21:02:58,399 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5466b7f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 21:02:58,399 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-18 21:02:58,404 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) [2022-11-18 21:02:58,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 21:02:58,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:02:58,416 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:02:58,419 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:02:58,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:58,428 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2022-11-18 21:02:58,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:58,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785677860] [2022-11-18 21:02:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:58,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:58,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:02:58,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:58,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785677860] [2022-11-18 21:02:58,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785677860] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:02:58,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:02:58,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:02:58,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158623006] [2022-11-18 21:02:58,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:02:58,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:02:58,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:02:58,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:02:58,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:02:58,939 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) [2022-11-18 21:02:59,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:02:59,184 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2022-11-18 21:02:59,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:02:59,187 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 [2022-11-18 21:02:59,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:02:59,199 INFO L225 Difference]: With dead ends: 73 [2022-11-18 21:02:59,199 INFO L226 Difference]: Without dead ends: 59 [2022-11-18 21:02:59,203 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 [2022-11-18 21:02:59,207 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 [2022-11-18 21:02:59,208 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] [2022-11-18 21:02:59,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-18 21:02:59,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2022-11-18 21:02:59,268 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) [2022-11-18 21:02:59,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-11-18 21:02:59,281 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2022-11-18 21:02:59,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:02:59,283 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-11-18 21:02:59,284 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) [2022-11-18 21:02:59,284 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-11-18 21:02:59,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 21:02:59,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:02:59,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:02:59,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 21:02:59,286 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:02:59,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:59,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2022-11-18 21:02:59,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:59,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617287408] [2022-11-18 21:02:59,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:59,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:02:59,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:59,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617287408] [2022-11-18 21:02:59,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617287408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:02:59,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:02:59,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:02:59,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243094792] [2022-11-18 21:02:59,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:02:59,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:02:59,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:02:59,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:02:59,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:02:59,425 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) [2022-11-18 21:02:59,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:02:59,531 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-11-18 21:02:59,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:02:59,533 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 [2022-11-18 21:02:59,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:02:59,537 INFO L225 Difference]: With dead ends: 51 [2022-11-18 21:02:59,537 INFO L226 Difference]: Without dead ends: 49 [2022-11-18 21:02:59,538 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 [2022-11-18 21:02:59,539 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-11-18 21:02:59,540 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] [2022-11-18 21:02:59,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-18 21:02:59,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-18 21:02:59,561 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) [2022-11-18 21:02:59,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-11-18 21:02:59,563 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 9 [2022-11-18 21:02:59,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:02:59,563 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-11-18 21:02:59,563 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) [2022-11-18 21:02:59,563 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-11-18 21:02:59,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 21:02:59,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:02:59,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:02:59,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 21:02:59,565 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:02:59,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:59,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2022-11-18 21:02:59,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:59,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963818631] [2022-11-18 21:02:59,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:59,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:59,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:02:59,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:59,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963818631] [2022-11-18 21:02:59,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963818631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:02:59,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:02:59,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:02:59,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792429490] [2022-11-18 21:02:59,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:02:59,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:02:59,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:02:59,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:02:59,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:02:59,715 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) [2022-11-18 21:02:59,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:02:59,872 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2022-11-18 21:02:59,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:02:59,873 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 [2022-11-18 21:02:59,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:02:59,877 INFO L225 Difference]: With dead ends: 76 [2022-11-18 21:02:59,878 INFO L226 Difference]: Without dead ends: 75 [2022-11-18 21:02:59,879 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 [2022-11-18 21:02:59,887 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 [2022-11-18 21:02:59,890 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] [2022-11-18 21:02:59,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-18 21:02:59,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2022-11-18 21:02:59,917 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) [2022-11-18 21:02:59,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2022-11-18 21:02:59,921 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 9 [2022-11-18 21:02:59,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:02:59,921 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2022-11-18 21:02:59,921 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) [2022-11-18 21:02:59,922 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2022-11-18 21:02:59,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 21:02:59,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:02:59,923 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:02:59,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 21:02:59,924 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:02:59,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:59,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2022-11-18 21:02:59,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:59,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939649097] [2022-11-18 21:02:59,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:59,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:59,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:00,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:00,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939649097] [2022-11-18 21:03:00,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939649097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:03:00,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:03:00,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:03:00,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942031821] [2022-11-18 21:03:00,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:03:00,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:03:00,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:00,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:03:00,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:03:00,003 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) [2022-11-18 21:03:00,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:00,096 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2022-11-18 21:03:00,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:03:00,097 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 [2022-11-18 21:03:00,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:00,098 INFO L225 Difference]: With dead ends: 116 [2022-11-18 21:03:00,099 INFO L226 Difference]: Without dead ends: 108 [2022-11-18 21:03:00,099 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 [2022-11-18 21:03:00,101 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 [2022-11-18 21:03:00,101 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] [2022-11-18 21:03:00,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-18 21:03:00,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-11-18 21:03:00,121 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) [2022-11-18 21:03:00,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2022-11-18 21:03:00,124 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 10 [2022-11-18 21:03:00,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:00,124 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2022-11-18 21:03:00,125 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) [2022-11-18 21:03:00,125 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2022-11-18 21:03:00,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:03:00,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:00,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:00,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 21:03:00,127 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:00,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:00,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1072007509, now seen corresponding path program 1 times [2022-11-18 21:03:00,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:00,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226133688] [2022-11-18 21:03:00,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:00,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:00,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:00,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:00,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226133688] [2022-11-18 21:03:00,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226133688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:03:00,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:03:00,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:03:00,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677546764] [2022-11-18 21:03:00,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:03:00,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:03:00,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:00,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:03:00,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:03:00,219 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) [2022-11-18 21:03:00,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:00,307 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2022-11-18 21:03:00,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:03:00,308 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 [2022-11-18 21:03:00,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:00,310 INFO L225 Difference]: With dead ends: 109 [2022-11-18 21:03:00,311 INFO L226 Difference]: Without dead ends: 108 [2022-11-18 21:03:00,311 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 [2022-11-18 21:03:00,312 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 [2022-11-18 21:03:00,313 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] [2022-11-18 21:03:00,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-18 21:03:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-11-18 21:03:00,330 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) [2022-11-18 21:03:00,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2022-11-18 21:03:00,341 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 12 [2022-11-18 21:03:00,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:00,341 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2022-11-18 21:03:00,342 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) [2022-11-18 21:03:00,342 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2022-11-18 21:03:00,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 21:03:00,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:00,343 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:00,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 21:03:00,344 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:00,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:00,344 INFO L85 PathProgramCache]: Analyzing trace with hash 219392943, now seen corresponding path program 1 times [2022-11-18 21:03:00,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:00,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229869283] [2022-11-18 21:03:00,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:00,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:00,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:00,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229869283] [2022-11-18 21:03:00,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229869283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:03:00,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:03:00,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:03:00,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001016179] [2022-11-18 21:03:00,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:03:00,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:03:00,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:00,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:03:00,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:03:00,415 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) [2022-11-18 21:03:00,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:00,481 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2022-11-18 21:03:00,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:03:00,483 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 [2022-11-18 21:03:00,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:00,487 INFO L225 Difference]: With dead ends: 168 [2022-11-18 21:03:00,487 INFO L226 Difference]: Without dead ends: 97 [2022-11-18 21:03:00,493 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 [2022-11-18 21:03:00,497 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 [2022-11-18 21:03:00,500 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] [2022-11-18 21:03:00,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-18 21:03:00,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-11-18 21:03:00,526 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) [2022-11-18 21:03:00,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2022-11-18 21:03:00,528 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 16 [2022-11-18 21:03:00,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:00,529 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2022-11-18 21:03:00,529 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) [2022-11-18 21:03:00,529 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2022-11-18 21:03:00,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 21:03:00,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:00,530 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:00,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 21:03:00,531 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:00,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:00,531 INFO L85 PathProgramCache]: Analyzing trace with hash 219399894, now seen corresponding path program 1 times [2022-11-18 21:03:00,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:00,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952774049] [2022-11-18 21:03:00,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:00,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:00,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:00,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952774049] [2022-11-18 21:03:00,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952774049] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:00,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915161124] [2022-11-18 21:03:00,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:00,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:00,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:00,654 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:00,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 21:03:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:00,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 21:03:00,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:00,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:00,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915161124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:00,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:03:00,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-18 21:03:00,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895986318] [2022-11-18 21:03:00,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:00,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:03:00,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:00,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:03:00,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:03:00,960 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) [2022-11-18 21:03:01,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:01,398 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2022-11-18 21:03:01,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 21:03:01,399 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 [2022-11-18 21:03:01,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:01,402 INFO L225 Difference]: With dead ends: 274 [2022-11-18 21:03:01,402 INFO L226 Difference]: Without dead ends: 272 [2022-11-18 21:03:01,403 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 [2022-11-18 21:03:01,404 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:01,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 165 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:03:01,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-18 21:03:01,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2022-11-18 21:03:01,465 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) [2022-11-18 21:03:01,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2022-11-18 21:03:01,469 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 16 [2022-11-18 21:03:01,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:01,469 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2022-11-18 21:03:01,469 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) [2022-11-18 21:03:01,470 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2022-11-18 21:03:01,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 21:03:01,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:01,470 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:01,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:01,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:01,689 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:01,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:01,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1162887243, now seen corresponding path program 1 times [2022-11-18 21:03:01,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:01,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906031397] [2022-11-18 21:03:01,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:01,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:01,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:01,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906031397] [2022-11-18 21:03:01,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906031397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:01,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789328333] [2022-11-18 21:03:01,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:01,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:01,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:01,771 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:01,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 21:03:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:01,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 21:03:01,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:01,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:01,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:03:01,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789328333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:03:01,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:03:01,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-11-18 21:03:01,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133116966] [2022-11-18 21:03:01,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:03:01,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:03:01,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:01,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:03:01,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:03:01,884 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) [2022-11-18 21:03:02,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:02,018 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2022-11-18 21:03:02,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:03:02,019 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 [2022-11-18 21:03:02,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:02,025 INFO L225 Difference]: With dead ends: 328 [2022-11-18 21:03:02,025 INFO L226 Difference]: Without dead ends: 327 [2022-11-18 21:03:02,026 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 [2022-11-18 21:03:02,027 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 [2022-11-18 21:03:02,027 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] [2022-11-18 21:03:02,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-11-18 21:03:02,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2022-11-18 21:03:02,078 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) [2022-11-18 21:03:02,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2022-11-18 21:03:02,081 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 17 [2022-11-18 21:03:02,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:02,082 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2022-11-18 21:03:02,082 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) [2022-11-18 21:03:02,082 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2022-11-18 21:03:02,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-18 21:03:02,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:02,083 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:02,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:02,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:02,289 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:02,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:02,289 INFO L85 PathProgramCache]: Analyzing trace with hash 523262015, now seen corresponding path program 1 times [2022-11-18 21:03:02,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:02,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088775307] [2022-11-18 21:03:02,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:02,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:02,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:02,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088775307] [2022-11-18 21:03:02,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088775307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:02,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318251958] [2022-11-18 21:03:02,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:02,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:02,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:02,391 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:02,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 21:03:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:02,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 21:03:02,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:02,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:02,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318251958] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:02,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:03:02,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-18 21:03:02,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948676762] [2022-11-18 21:03:02,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:02,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:03:02,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:02,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:03:02,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:03:02,612 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) [2022-11-18 21:03:02,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:02,950 INFO L93 Difference]: Finished difference Result 591 states and 792 transitions. [2022-11-18 21:03:02,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 21:03:02,953 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 [2022-11-18 21:03:02,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:02,956 INFO L225 Difference]: With dead ends: 591 [2022-11-18 21:03:02,956 INFO L226 Difference]: Without dead ends: 590 [2022-11-18 21:03:02,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-11-18 21:03:02,957 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 [2022-11-18 21:03:02,958 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] [2022-11-18 21:03:02,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-11-18 21:03:03,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 521. [2022-11-18 21:03:03,029 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) [2022-11-18 21:03:03,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2022-11-18 21:03:03,034 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 20 [2022-11-18 21:03:03,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:03,034 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2022-11-18 21:03:03,034 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) [2022-11-18 21:03:03,034 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2022-11-18 21:03:03,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 21:03:03,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:03,039 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] [2022-11-18 21:03:03,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:03,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 21:03:03,244 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:03,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:03,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2022-11-18 21:03:03,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:03,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943792108] [2022-11-18 21:03:03,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:03,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:03,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:03:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:03:03,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:03,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943792108] [2022-11-18 21:03:03,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943792108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:03,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277703336] [2022-11-18 21:03:03,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:03,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:03,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:03,367 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:03,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 21:03:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:03,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 21:03:03,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:03:03,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:03:03,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277703336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:03,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:03:03,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-18 21:03:03,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163458899] [2022-11-18 21:03:03,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:03,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 21:03:03,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:03,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 21:03:03,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-18 21:03:03,725 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) [2022-11-18 21:03:04,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:04,247 INFO L93 Difference]: Finished difference Result 870 states and 1257 transitions. [2022-11-18 21:03:04,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 21:03:04,254 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 [2022-11-18 21:03:04,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:04,263 INFO L225 Difference]: With dead ends: 870 [2022-11-18 21:03:04,263 INFO L226 Difference]: Without dead ends: 868 [2022-11-18 21:03:04,264 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 [2022-11-18 21:03:04,265 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 [2022-11-18 21:03:04,267 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] [2022-11-18 21:03:04,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-11-18 21:03:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 728. [2022-11-18 21:03:04,352 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) [2022-11-18 21:03:04,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 989 transitions. [2022-11-18 21:03:04,360 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 989 transitions. Word has length 24 [2022-11-18 21:03:04,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:04,360 INFO L495 AbstractCegarLoop]: Abstraction has 728 states and 989 transitions. [2022-11-18 21:03:04,360 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) [2022-11-18 21:03:04,360 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 989 transitions. [2022-11-18 21:03:04,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 21:03:04,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:04,361 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] [2022-11-18 21:03:04,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:04,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:04,567 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:04,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:04,568 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2022-11-18 21:03:04,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:04,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945981639] [2022-11-18 21:03:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:04,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:04,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:03:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:03:04,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:04,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945981639] [2022-11-18 21:03:04,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945981639] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:04,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240352952] [2022-11-18 21:03:04,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:04,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:04,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:04,747 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:04,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 21:03:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:04,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 21:03:04,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:03:04,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:03:04,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240352952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:03:04,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:03:04,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2022-11-18 21:03:04,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220536450] [2022-11-18 21:03:04,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:03:04,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:03:04,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:04,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:03:04,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:03:04,848 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) [2022-11-18 21:03:04,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:04,992 INFO L93 Difference]: Finished difference Result 737 states and 999 transitions. [2022-11-18 21:03:04,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 21:03:04,992 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 [2022-11-18 21:03:04,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:04,997 INFO L225 Difference]: With dead ends: 737 [2022-11-18 21:03:04,997 INFO L226 Difference]: Without dead ends: 736 [2022-11-18 21:03:04,998 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 [2022-11-18 21:03:04,998 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 41 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-11-18 21:03:04,999 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] [2022-11-18 21:03:05,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-11-18 21:03:05,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 727. [2022-11-18 21:03:05,074 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) [2022-11-18 21:03:05,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 981 transitions. [2022-11-18 21:03:05,081 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 981 transitions. Word has length 25 [2022-11-18 21:03:05,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:05,082 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 981 transitions. [2022-11-18 21:03:05,082 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) [2022-11-18 21:03:05,082 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 981 transitions. [2022-11-18 21:03:05,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-18 21:03:05,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:05,084 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] [2022-11-18 21:03:05,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:05,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:05,290 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:05,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:05,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1583952330, now seen corresponding path program 1 times [2022-11-18 21:03:05,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:05,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559807430] [2022-11-18 21:03:05,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:05,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:05,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:03:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 21:03:05,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:05,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559807430] [2022-11-18 21:03:05,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559807430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:05,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138201029] [2022-11-18 21:03:05,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:05,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:05,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:05,444 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:05,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 21:03:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:05,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 21:03:05,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:03:05,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:03:05,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138201029] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:05,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:03:05,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2022-11-18 21:03:05,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103070924] [2022-11-18 21:03:05,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:03:05,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 21:03:05,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:05,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 21:03:05,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-18 21:03:05,735 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) [2022-11-18 21:03:06,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:06,028 INFO L93 Difference]: Finished difference Result 886 states and 1251 transitions. [2022-11-18 21:03:06,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 21:03:06,028 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 [2022-11-18 21:03:06,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:06,033 INFO L225 Difference]: With dead ends: 886 [2022-11-18 21:03:06,034 INFO L226 Difference]: Without dead ends: 885 [2022-11-18 21:03:06,035 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 [2022-11-18 21:03:06,035 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 [2022-11-18 21:03:06,036 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] [2022-11-18 21:03:06,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-11-18 21:03:06,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 812. [2022-11-18 21:03:06,116 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) [2022-11-18 21:03:06,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1076 transitions. [2022-11-18 21:03:06,123 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1076 transitions. Word has length 28 [2022-11-18 21:03:06,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:06,123 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1076 transitions. [2022-11-18 21:03:06,124 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) [2022-11-18 21:03:06,124 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1076 transitions. [2022-11-18 21:03:06,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-18 21:03:06,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:06,127 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] [2022-11-18 21:03:06,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:06,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:06,333 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:06,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:06,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1777813581, now seen corresponding path program 1 times [2022-11-18 21:03:06,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:06,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243403019] [2022-11-18 21:03:06,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:06,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:06,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:03:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:06,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 21:03:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 21:03:06,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:06,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243403019] [2022-11-18 21:03:06,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243403019] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:06,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405158829] [2022-11-18 21:03:06,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:06,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:06,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:06,508 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:06,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 21:03:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:06,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 21:03:06,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 21:03:06,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 21:03:06,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405158829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:06,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:03:06,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-11-18 21:03:06,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252384609] [2022-11-18 21:03:06,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:06,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 21:03:06,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:06,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 21:03:06,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-18 21:03:06,856 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) [2022-11-18 21:03:07,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:07,517 INFO L93 Difference]: Finished difference Result 1503 states and 2506 transitions. [2022-11-18 21:03:07,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 21:03:07,518 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 [2022-11-18 21:03:07,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:07,531 INFO L225 Difference]: With dead ends: 1503 [2022-11-18 21:03:07,531 INFO L226 Difference]: Without dead ends: 1501 [2022-11-18 21:03:07,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2022-11-18 21:03:07,535 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 135 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:07,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 172 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:03:07,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-11-18 21:03:07,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1258. [2022-11-18 21:03:07,690 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) [2022-11-18 21:03:07,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1844 transitions. [2022-11-18 21:03:07,704 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1844 transitions. Word has length 33 [2022-11-18 21:03:07,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:07,705 INFO L495 AbstractCegarLoop]: Abstraction has 1258 states and 1844 transitions. [2022-11-18 21:03:07,705 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) [2022-11-18 21:03:07,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1844 transitions. [2022-11-18 21:03:07,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-18 21:03:07,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:07,706 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] [2022-11-18 21:03:07,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:07,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 21:03:07,912 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:07,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:07,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1227703372, now seen corresponding path program 2 times [2022-11-18 21:03:07,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:07,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62379011] [2022-11-18 21:03:07,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:07,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:08,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:03:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 21:03:08,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:08,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62379011] [2022-11-18 21:03:08,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62379011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:08,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6319568] [2022-11-18 21:03:08,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:03:08,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:08,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:08,085 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:08,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 21:03:08,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:03:08,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:08,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 21:03:08,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 21:03:08,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 21:03:08,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6319568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:08,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:03:08,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 21:03:08,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145926752] [2022-11-18 21:03:08,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:08,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 21:03:08,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:08,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 21:03:08,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-18 21:03:08,426 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) [2022-11-18 21:03:09,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:09,266 INFO L93 Difference]: Finished difference Result 2355 states and 3821 transitions. [2022-11-18 21:03:09,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 21:03:09,268 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 [2022-11-18 21:03:09,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:09,284 INFO L225 Difference]: With dead ends: 2355 [2022-11-18 21:03:09,285 INFO L226 Difference]: Without dead ends: 2338 [2022-11-18 21:03:09,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=1009, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 21:03:09,288 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:09,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 161 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:03:09,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2022-11-18 21:03:09,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 1753. [2022-11-18 21:03:09,518 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) [2022-11-18 21:03:09,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2628 transitions. [2022-11-18 21:03:09,537 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2628 transitions. Word has length 36 [2022-11-18 21:03:09,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:09,537 INFO L495 AbstractCegarLoop]: Abstraction has 1753 states and 2628 transitions. [2022-11-18 21:03:09,537 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) [2022-11-18 21:03:09,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2628 transitions. [2022-11-18 21:03:09,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-18 21:03:09,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:09,539 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] [2022-11-18 21:03:09,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:09,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 21:03:09,745 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:09,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:09,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1699542727, now seen corresponding path program 1 times [2022-11-18 21:03:09,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:09,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472779866] [2022-11-18 21:03:09,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:09,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:09,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:03:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:09,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 21:03:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:09,876 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 21:03:09,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:09,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472779866] [2022-11-18 21:03:09,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472779866] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:09,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612077830] [2022-11-18 21:03:09,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:09,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:09,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:09,879 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:09,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 21:03:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:09,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 21:03:09,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 21:03:10,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 21:03:10,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612077830] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:10,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:03:10,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2022-11-18 21:03:10,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629102105] [2022-11-18 21:03:10,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:03:10,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 21:03:10,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:10,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 21:03:10,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-11-18 21:03:10,236 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) [2022-11-18 21:03:10,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:10,690 INFO L93 Difference]: Finished difference Result 1910 states and 3114 transitions. [2022-11-18 21:03:10,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 21:03:10,691 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 [2022-11-18 21:03:10,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:10,704 INFO L225 Difference]: With dead ends: 1910 [2022-11-18 21:03:10,705 INFO L226 Difference]: Without dead ends: 1909 [2022-11-18 21:03:10,707 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 [2022-11-18 21:03:10,707 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 63 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:10,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 168 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 21:03:10,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2022-11-18 21:03:10,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1734. [2022-11-18 21:03:10,899 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) [2022-11-18 21:03:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2480 transitions. [2022-11-18 21:03:10,909 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2480 transitions. Word has length 37 [2022-11-18 21:03:10,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:10,911 INFO L495 AbstractCegarLoop]: Abstraction has 1734 states and 2480 transitions. [2022-11-18 21:03:10,911 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) [2022-11-18 21:03:10,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2480 transitions. [2022-11-18 21:03:10,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-18 21:03:10,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:10,913 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] [2022-11-18 21:03:10,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:11,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 21:03:11,119 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:11,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:11,120 INFO L85 PathProgramCache]: Analyzing trace with hash 865218898, now seen corresponding path program 1 times [2022-11-18 21:03:11,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:11,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222562944] [2022-11-18 21:03:11,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:11,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:11,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:03:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:11,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:03:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:11,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 21:03:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 21:03:11,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:11,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222562944] [2022-11-18 21:03:11,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222562944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:11,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682673232] [2022-11-18 21:03:11,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:11,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:11,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:11,189 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:11,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 21:03:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:11,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 21:03:11,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 21:03:11,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:11,496 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 21:03:11,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682673232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:11,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:03:11,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2022-11-18 21:03:11,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544731189] [2022-11-18 21:03:11,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:11,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:03:11,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:11,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:03:11,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:03:11,499 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) [2022-11-18 21:03:11,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:11,733 INFO L93 Difference]: Finished difference Result 2467 states and 3685 transitions. [2022-11-18 21:03:11,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:03:11,734 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 [2022-11-18 21:03:11,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:11,740 INFO L225 Difference]: With dead ends: 2467 [2022-11-18 21:03:11,740 INFO L226 Difference]: Without dead ends: 869 [2022-11-18 21:03:11,750 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 [2022-11-18 21:03:11,751 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 [2022-11-18 21:03:11,751 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] [2022-11-18 21:03:11,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-11-18 21:03:11,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 850. [2022-11-18 21:03:11,850 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) [2022-11-18 21:03:11,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1115 transitions. [2022-11-18 21:03:11,856 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1115 transitions. Word has length 43 [2022-11-18 21:03:11,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:11,856 INFO L495 AbstractCegarLoop]: Abstraction has 850 states and 1115 transitions. [2022-11-18 21:03:11,857 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) [2022-11-18 21:03:11,857 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1115 transitions. [2022-11-18 21:03:11,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-18 21:03:11,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:11,858 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:11,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:12,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 21:03:12,064 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:12,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:12,065 INFO L85 PathProgramCache]: Analyzing trace with hash -151680771, now seen corresponding path program 2 times [2022-11-18 21:03:12,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:12,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445329214] [2022-11-18 21:03:12,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:12,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:12,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:12,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445329214] [2022-11-18 21:03:12,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445329214] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:12,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910921523] [2022-11-18 21:03:12,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:03:12,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:12,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:12,265 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:12,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 21:03:12,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:03:12,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:12,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 21:03:12,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:12,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:12,606 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:12,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910921523] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:12,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:03:12,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-11-18 21:03:12,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035301327] [2022-11-18 21:03:12,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:12,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 21:03:12,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:12,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 21:03:12,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-11-18 21:03:12,608 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) [2022-11-18 21:03:13,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:13,358 INFO L93 Difference]: Finished difference Result 1623 states and 2347 transitions. [2022-11-18 21:03:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-18 21:03:13,359 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 [2022-11-18 21:03:13,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:13,368 INFO L225 Difference]: With dead ends: 1623 [2022-11-18 21:03:13,368 INFO L226 Difference]: Without dead ends: 1622 [2022-11-18 21:03:13,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 21:03:13,370 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 [2022-11-18 21:03:13,370 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] [2022-11-18 21:03:13,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2022-11-18 21:03:13,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1510. [2022-11-18 21:03:13,530 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) [2022-11-18 21:03:13,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 1955 transitions. [2022-11-18 21:03:13,536 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 1955 transitions. Word has length 44 [2022-11-18 21:03:13,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:13,537 INFO L495 AbstractCegarLoop]: Abstraction has 1510 states and 1955 transitions. [2022-11-18 21:03:13,537 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) [2022-11-18 21:03:13,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 1955 transitions. [2022-11-18 21:03:13,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 21:03:13,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:13,539 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] [2022-11-18 21:03:13,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-18 21:03:13,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 21:03:13,744 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:13,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:13,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1560392739, now seen corresponding path program 2 times [2022-11-18 21:03:13,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:13,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515131532] [2022-11-18 21:03:13,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:13,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:13,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:03:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:13,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 21:03:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:13,891 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 21:03:13,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:13,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515131532] [2022-11-18 21:03:13,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515131532] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:13,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826053747] [2022-11-18 21:03:13,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:03:13,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:13,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:13,893 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:13,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 21:03:13,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:03:13,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:13,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 21:03:13,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 21:03:14,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 21:03:14,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826053747] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:14,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:03:14,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-11-18 21:03:14,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827714217] [2022-11-18 21:03:14,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:14,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 21:03:14,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:14,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 21:03:14,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-11-18 21:03:14,297 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) [2022-11-18 21:03:15,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:15,661 INFO L93 Difference]: Finished difference Result 3056 states and 4731 transitions. [2022-11-18 21:03:15,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 21:03:15,662 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 [2022-11-18 21:03:15,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:15,687 INFO L225 Difference]: With dead ends: 3056 [2022-11-18 21:03:15,687 INFO L226 Difference]: Without dead ends: 2163 [2022-11-18 21:03:15,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=504, Invalid=1752, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 21:03:15,699 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 244 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:15,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 258 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 21:03:15,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2022-11-18 21:03:15,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1621. [2022-11-18 21:03:15,952 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) [2022-11-18 21:03:15,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2084 transitions. [2022-11-18 21:03:15,963 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2084 transitions. Word has length 45 [2022-11-18 21:03:15,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:15,964 INFO L495 AbstractCegarLoop]: Abstraction has 1621 states and 2084 transitions. [2022-11-18 21:03:15,964 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) [2022-11-18 21:03:15,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2084 transitions. [2022-11-18 21:03:15,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-18 21:03:15,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:15,966 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] [2022-11-18 21:03:15,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:16,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 21:03:16,172 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:16,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:16,172 INFO L85 PathProgramCache]: Analyzing trace with hash 442862615, now seen corresponding path program 1 times [2022-11-18 21:03:16,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:16,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75107131] [2022-11-18 21:03:16,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:16,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:16,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:03:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:16,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:03:16,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:16,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 21:03:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:16,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-18 21:03:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 21:03:16,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:16,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75107131] [2022-11-18 21:03:16,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75107131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:16,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644341530] [2022-11-18 21:03:16,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:16,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:16,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:16,443 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:16,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 21:03:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:16,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 21:03:16,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-18 21:03:16,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 21:03:17,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644341530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:17,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:03:17,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-11-18 21:03:17,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582883426] [2022-11-18 21:03:17,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:17,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 21:03:17,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:17,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 21:03:17,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-11-18 21:03:17,141 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) [2022-11-18 21:03:19,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:19,155 INFO L93 Difference]: Finished difference Result 4064 states and 7465 transitions. [2022-11-18 21:03:19,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-18 21:03:19,156 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 [2022-11-18 21:03:19,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:19,195 INFO L225 Difference]: With dead ends: 4064 [2022-11-18 21:03:19,195 INFO L226 Difference]: Without dead ends: 4060 [2022-11-18 21:03:19,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2022-11-18 21:03:19,200 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 167 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:19,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 244 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 21:03:19,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4060 states. [2022-11-18 21:03:19,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4060 to 2916. [2022-11-18 21:03:19,683 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) [2022-11-18 21:03:19,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 5949 transitions. [2022-11-18 21:03:19,705 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 5949 transitions. Word has length 52 [2022-11-18 21:03:19,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:19,706 INFO L495 AbstractCegarLoop]: Abstraction has 2916 states and 5949 transitions. [2022-11-18 21:03:19,706 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) [2022-11-18 21:03:19,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 5949 transitions. [2022-11-18 21:03:19,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-18 21:03:19,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:19,709 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:19,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:19,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:19,914 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:19,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:19,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1991697283, now seen corresponding path program 1 times [2022-11-18 21:03:19,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:19,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280857272] [2022-11-18 21:03:19,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:19,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 21:03:20,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:20,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280857272] [2022-11-18 21:03:20,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280857272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:20,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433016442] [2022-11-18 21:03:20,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:20,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:20,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:20,108 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:20,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 21:03:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:20,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 21:03:20,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 21:03:20,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 21:03:20,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433016442] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:20,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:03:20,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-11-18 21:03:20,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647114791] [2022-11-18 21:03:20,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:20,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 21:03:20,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:20,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 21:03:20,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-11-18 21:03:20,560 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) [2022-11-18 21:03:22,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:22,050 INFO L93 Difference]: Finished difference Result 7961 states and 16550 transitions. [2022-11-18 21:03:22,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-18 21:03:22,051 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 [2022-11-18 21:03:22,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:22,191 INFO L225 Difference]: With dead ends: 7961 [2022-11-18 21:03:22,191 INFO L226 Difference]: Without dead ends: 7960 [2022-11-18 21:03:22,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 21:03:22,198 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 556 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:22,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 349 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 21:03:22,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7960 states. [2022-11-18 21:03:23,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7960 to 7884. [2022-11-18 21:03:23,324 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) [2022-11-18 21:03:23,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7884 states to 7884 states and 16119 transitions. [2022-11-18 21:03:23,386 INFO L78 Accepts]: Start accepts. Automaton has 7884 states and 16119 transitions. Word has length 58 [2022-11-18 21:03:23,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:23,387 INFO L495 AbstractCegarLoop]: Abstraction has 7884 states and 16119 transitions. [2022-11-18 21:03:23,387 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) [2022-11-18 21:03:23,387 INFO L276 IsEmpty]: Start isEmpty. Operand 7884 states and 16119 transitions. [2022-11-18 21:03:23,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-18 21:03:23,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:23,389 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] [2022-11-18 21:03:23,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:23,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:23,595 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:23,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:23,595 INFO L85 PathProgramCache]: Analyzing trace with hash 526800899, now seen corresponding path program 1 times [2022-11-18 21:03:23,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:23,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358923408] [2022-11-18 21:03:23,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:23,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:23,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:03:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:23,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:03:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:23,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 21:03:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:23,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-18 21:03:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 21:03:23,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:23,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358923408] [2022-11-18 21:03:23,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358923408] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:23,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434353989] [2022-11-18 21:03:23,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:23,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:23,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:23,869 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:23,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 21:03:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:23,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 21:03:23,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-18 21:03:24,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:24,567 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 21:03:24,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434353989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:24,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:03:24,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-11-18 21:03:24,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804194201] [2022-11-18 21:03:24,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:24,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 21:03:24,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:24,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 21:03:24,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-11-18 21:03:24,569 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) [2022-11-18 21:03:28,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:28,198 INFO L93 Difference]: Finished difference Result 27422 states and 98822 transitions. [2022-11-18 21:03:28,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 21:03:28,199 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 [2022-11-18 21:03:28,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:28,487 INFO L225 Difference]: With dead ends: 27422 [2022-11-18 21:03:28,487 INFO L226 Difference]: Without dead ends: 20893 [2022-11-18 21:03:28,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=906, Invalid=3516, Unknown=0, NotChecked=0, Total=4422 [2022-11-18 21:03:28,848 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 157 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:28,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 317 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 21:03:28,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20893 states. [2022-11-18 21:03:32,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20893 to 16604. [2022-11-18 21:03:32,298 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) [2022-11-18 21:03:32,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16604 states to 16604 states and 59949 transitions. [2022-11-18 21:03:32,854 INFO L78 Accepts]: Start accepts. Automaton has 16604 states and 59949 transitions. Word has length 56 [2022-11-18 21:03:32,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:32,854 INFO L495 AbstractCegarLoop]: Abstraction has 16604 states and 59949 transitions. [2022-11-18 21:03:32,854 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) [2022-11-18 21:03:32,855 INFO L276 IsEmpty]: Start isEmpty. Operand 16604 states and 59949 transitions. [2022-11-18 21:03:32,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-18 21:03:32,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:32,857 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] [2022-11-18 21:03:32,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:33,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-18 21:03:33,063 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:33,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:33,063 INFO L85 PathProgramCache]: Analyzing trace with hash 55857866, now seen corresponding path program 2 times [2022-11-18 21:03:33,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:33,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470655580] [2022-11-18 21:03:33,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:33,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:03:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 21:03:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:03:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 21:03:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-18 21:03:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-18 21:03:33,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:33,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470655580] [2022-11-18 21:03:33,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470655580] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:33,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807578102] [2022-11-18 21:03:33,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:03:33,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:33,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:33,454 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:33,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 21:03:33,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:03:33,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:33,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:03:33,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 23 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-18 21:03:33,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 80 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-18 21:03:34,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807578102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:34,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:03:34,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2022-11-18 21:03:34,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289812957] [2022-11-18 21:03:34,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:34,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 21:03:34,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:34,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 21:03:34,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 21:03:34,771 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) [2022-11-18 21:03:37,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:37,192 INFO L93 Difference]: Finished difference Result 25458 states and 94365 transitions. [2022-11-18 21:03:37,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 21:03:37,193 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 [2022-11-18 21:03:37,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:37,259 INFO L225 Difference]: With dead ends: 25458 [2022-11-18 21:03:37,260 INFO L226 Difference]: Without dead ends: 10209 [2022-11-18 21:03:37,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=667, Invalid=2639, Unknown=0, NotChecked=0, Total=3306 [2022-11-18 21:03:37,687 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 194 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:37,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 378 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 21:03:37,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10209 states. [2022-11-18 21:03:38,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10209 to 9706. [2022-11-18 21:03:38,617 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) [2022-11-18 21:03:38,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9706 states to 9706 states and 15639 transitions. [2022-11-18 21:03:38,673 INFO L78 Accepts]: Start accepts. Automaton has 9706 states and 15639 transitions. Word has length 73 [2022-11-18 21:03:38,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:38,674 INFO L495 AbstractCegarLoop]: Abstraction has 9706 states and 15639 transitions. [2022-11-18 21:03:38,674 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) [2022-11-18 21:03:38,674 INFO L276 IsEmpty]: Start isEmpty. Operand 9706 states and 15639 transitions. [2022-11-18 21:03:38,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 21:03:38,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:38,686 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] [2022-11-18 21:03:38,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:38,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-18 21:03:38,893 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:38,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:38,893 INFO L85 PathProgramCache]: Analyzing trace with hash -131434271, now seen corresponding path program 3 times [2022-11-18 21:03:38,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:38,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652526656] [2022-11-18 21:03:38,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:38,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:39,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:03:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:39,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 21:03:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 21:03:39,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:39,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652526656] [2022-11-18 21:03:39,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652526656] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:39,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304228156] [2022-11-18 21:03:39,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:03:39,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:39,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:39,154 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:39,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 21:03:39,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-18 21:03:39,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:39,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 21:03:39,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 21:03:39,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 65 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 21:03:39,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304228156] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:39,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:03:39,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-11-18 21:03:39,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905046757] [2022-11-18 21:03:39,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:39,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 21:03:39,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:39,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 21:03:39,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 21:03:39,912 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) [2022-11-18 21:03:41,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:41,638 INFO L93 Difference]: Finished difference Result 10357 states and 16637 transitions. [2022-11-18 21:03:41,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 21:03:41,638 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 [2022-11-18 21:03:41,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:41,681 INFO L225 Difference]: With dead ends: 10357 [2022-11-18 21:03:41,682 INFO L226 Difference]: Without dead ends: 10356 [2022-11-18 21:03:41,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=573, Invalid=1977, Unknown=0, NotChecked=0, Total=2550 [2022-11-18 21:03:41,687 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 236 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:41,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 232 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:03:41,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10356 states. [2022-11-18 21:03:42,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10356 to 9814. [2022-11-18 21:03:42,579 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) [2022-11-18 21:03:42,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9814 states to 9814 states and 15779 transitions. [2022-11-18 21:03:42,705 INFO L78 Accepts]: Start accepts. Automaton has 9814 states and 15779 transitions. Word has length 69 [2022-11-18 21:03:42,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:42,706 INFO L495 AbstractCegarLoop]: Abstraction has 9814 states and 15779 transitions. [2022-11-18 21:03:42,706 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) [2022-11-18 21:03:42,706 INFO L276 IsEmpty]: Start isEmpty. Operand 9814 states and 15779 transitions. [2022-11-18 21:03:42,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-18 21:03:42,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:42,710 INFO L195 NwaCegarLoop]: trace histogram [13, 9, 7, 7, 7, 7, 7, 7, 7, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:42,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:42,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-18 21:03:42,916 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:42,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:42,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1980612256, now seen corresponding path program 2 times [2022-11-18 21:03:42,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:42,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252175177] [2022-11-18 21:03:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:42,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:43,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-18 21:03:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:43,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 21:03:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:43,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:03:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:43,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:03:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:43,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 21:03:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:43,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-18 21:03:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:43,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-18 21:03:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 152 proven. 28 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-11-18 21:03:43,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:43,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252175177] [2022-11-18 21:03:43,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252175177] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:43,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530642578] [2022-11-18 21:03:43,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:03:43,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:43,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:43,203 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:43,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 21:03:43,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:03:43,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:43,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 21:03:43,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 154 proven. 15 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-18 21:03:43,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:43,796 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 154 proven. 26 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-11-18 21:03:43,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530642578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:43,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:03:43,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 8] total 14 [2022-11-18 21:03:43,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596074616] [2022-11-18 21:03:43,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:43,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 21:03:43,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:43,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 21:03:43,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-18 21:03:43,799 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) [2022-11-18 21:03:44,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:44,759 INFO L93 Difference]: Finished difference Result 18932 states and 34355 transitions. [2022-11-18 21:03:44,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 21:03:44,759 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 112 [2022-11-18 21:03:44,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:44,931 INFO L225 Difference]: With dead ends: 18932 [2022-11-18 21:03:44,931 INFO L226 Difference]: Without dead ends: 10758 [2022-11-18 21:03:44,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 230 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2022-11-18 21:03:44,981 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 112 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:44,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 97 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:03:44,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10758 states. [2022-11-18 21:03:45,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10758 to 9808. [2022-11-18 21:03:45,895 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) [2022-11-18 21:03:45,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9808 states to 9808 states and 15693 transitions. [2022-11-18 21:03:45,938 INFO L78 Accepts]: Start accepts. Automaton has 9808 states and 15693 transitions. Word has length 112 [2022-11-18 21:03:45,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:45,939 INFO L495 AbstractCegarLoop]: Abstraction has 9808 states and 15693 transitions. [2022-11-18 21:03:45,939 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) [2022-11-18 21:03:45,939 INFO L276 IsEmpty]: Start isEmpty. Operand 9808 states and 15693 transitions. [2022-11-18 21:03:45,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-18 21:03:45,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:45,945 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] [2022-11-18 21:03:45,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:46,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:46,150 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:46,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:46,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1897499616, now seen corresponding path program 3 times [2022-11-18 21:03:46,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:46,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443409945] [2022-11-18 21:03:46,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:46,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:46,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:03:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:46,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:03:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:46,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:03:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:46,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 21:03:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:46,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:03:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:46,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 21:03:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:46,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-18 21:03:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:46,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-18 21:03:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:46,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 21:03:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 113 proven. 51 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-18 21:03:46,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:46,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443409945] [2022-11-18 21:03:46,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443409945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:46,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496102274] [2022-11-18 21:03:46,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:03:46,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:46,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:46,605 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:46,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 21:03:46,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 21:03:46,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:46,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 21:03:46,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 150 proven. 26 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-18 21:03:46,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 119 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-18 21:03:47,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496102274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:47,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:03:47,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 17 [2022-11-18 21:03:47,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997961620] [2022-11-18 21:03:47,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:47,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 21:03:47,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:47,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 21:03:47,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-11-18 21:03:47,916 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) [2022-11-18 21:03:49,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:49,296 INFO L93 Difference]: Finished difference Result 20497 states and 41620 transitions. [2022-11-18 21:03:49,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 21:03:49,297 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 [2022-11-18 21:03:49,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:49,371 INFO L225 Difference]: With dead ends: 20497 [2022-11-18 21:03:49,371 INFO L226 Difference]: Without dead ends: 12358 [2022-11-18 21:03:49,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 206 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2022-11-18 21:03:49,438 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 103 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:49,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 138 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:03:49,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12358 states. [2022-11-18 21:03:50,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12358 to 11997. [2022-11-18 21:03:50,656 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) [2022-11-18 21:03:50,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11997 states to 11997 states and 19076 transitions. [2022-11-18 21:03:50,707 INFO L78 Accepts]: Start accepts. Automaton has 11997 states and 19076 transitions. Word has length 99 [2022-11-18 21:03:50,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:50,707 INFO L495 AbstractCegarLoop]: Abstraction has 11997 states and 19076 transitions. [2022-11-18 21:03:50,707 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) [2022-11-18 21:03:50,707 INFO L276 IsEmpty]: Start isEmpty. Operand 11997 states and 19076 transitions. [2022-11-18 21:03:50,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-18 21:03:50,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:50,715 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] [2022-11-18 21:03:50,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:50,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 21:03:50,921 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:50,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:50,921 INFO L85 PathProgramCache]: Analyzing trace with hash -127918165, now seen corresponding path program 3 times [2022-11-18 21:03:50,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:50,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485063685] [2022-11-18 21:03:50,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:50,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:51,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:03:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:51,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:03:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:51,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 21:03:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:51,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-18 21:03:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 122 proven. 90 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 21:03:51,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:51,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485063685] [2022-11-18 21:03:51,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485063685] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:51,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092223637] [2022-11-18 21:03:51,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:03:51,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:51,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:51,337 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:51,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 21:03:51,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-18 21:03:51,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:51,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 21:03:51,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 119 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-18 21:03:51,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-18 21:03:51,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092223637] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:51,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:03:51,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2022-11-18 21:03:51,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145307679] [2022-11-18 21:03:51,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:51,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 21:03:51,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:51,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 21:03:51,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-11-18 21:03:51,838 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) [2022-11-18 21:03:54,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:54,435 INFO L93 Difference]: Finished difference Result 20852 states and 35642 transitions. [2022-11-18 21:03:54,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-18 21:03:54,435 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 [2022-11-18 21:03:54,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:54,493 INFO L225 Difference]: With dead ends: 20852 [2022-11-18 21:03:54,493 INFO L226 Difference]: Without dead ends: 10359 [2022-11-18 21:03:54,579 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 [2022-11-18 21:03:54,579 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 194 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:54,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 161 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 21:03:54,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10359 states. [2022-11-18 21:03:55,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10359 to 8741. [2022-11-18 21:03:55,603 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) [2022-11-18 21:03:55,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8741 states to 8741 states and 12053 transitions. [2022-11-18 21:03:55,632 INFO L78 Accepts]: Start accepts. Automaton has 8741 states and 12053 transitions. Word has length 88 [2022-11-18 21:03:55,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:55,632 INFO L495 AbstractCegarLoop]: Abstraction has 8741 states and 12053 transitions. [2022-11-18 21:03:55,632 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) [2022-11-18 21:03:55,632 INFO L276 IsEmpty]: Start isEmpty. Operand 8741 states and 12053 transitions. [2022-11-18 21:03:55,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-18 21:03:55,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:55,637 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] [2022-11-18 21:03:55,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:55,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 21:03:55,843 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:03:55,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:55,843 INFO L85 PathProgramCache]: Analyzing trace with hash -635779733, now seen corresponding path program 4 times [2022-11-18 21:03:55,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:55,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204333230] [2022-11-18 21:03:55,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:55,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:56,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:03:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:56,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:03:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:56,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:03:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:56,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:03:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:56,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 21:03:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:56,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-18 21:03:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:56,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-18 21:03:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:56,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-18 21:03:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 51 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-18 21:03:56,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:56,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204333230] [2022-11-18 21:03:56,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204333230] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:56,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906483297] [2022-11-18 21:03:56,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:03:56,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:56,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:56,439 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:56,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 21:03:56,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:03:56,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:56,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 21:03:56,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 67 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-18 21:03:56,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 42 proven. 89 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-18 21:03:58,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906483297] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:58,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:03:58,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2022-11-18 21:03:58,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014627794] [2022-11-18 21:03:58,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:58,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-18 21:03:58,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:58,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-18 21:03:58,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 21:03:58,762 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) [2022-11-18 21:04:05,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:05,517 INFO L93 Difference]: Finished difference Result 29169 states and 46148 transitions. [2022-11-18 21:04:05,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-11-18 21:04:05,518 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 [2022-11-18 21:04:05,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:05,693 INFO L225 Difference]: With dead ends: 29169 [2022-11-18 21:04:05,694 INFO L226 Difference]: Without dead ends: 28067 [2022-11-18 21:04:05,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12263 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5454, Invalid=27126, Unknown=0, NotChecked=0, Total=32580 [2022-11-18 21:04:05,734 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 321 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 961 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 2241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 961 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:05,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 307 Invalid, 2241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [961 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 21:04:05,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28067 states. [2022-11-18 21:04:08,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28067 to 17311. [2022-11-18 21:04:08,241 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) [2022-11-18 21:04:08,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17311 states to 17311 states and 26931 transitions. [2022-11-18 21:04:08,345 INFO L78 Accepts]: Start accepts. Automaton has 17311 states and 26931 transitions. Word has length 90 [2022-11-18 21:04:08,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:08,345 INFO L495 AbstractCegarLoop]: Abstraction has 17311 states and 26931 transitions. [2022-11-18 21:04:08,346 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) [2022-11-18 21:04:08,346 INFO L276 IsEmpty]: Start isEmpty. Operand 17311 states and 26931 transitions. [2022-11-18 21:04:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-18 21:04:08,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:08,351 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:08,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-18 21:04:08,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:08,559 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-18 21:04:08,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:08,560 INFO L85 PathProgramCache]: Analyzing trace with hash 147414137, now seen corresponding path program 3 times [2022-11-18 21:04:08,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:08,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545179429] [2022-11-18 21:04:08,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:08,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:09,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:09,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545179429] [2022-11-18 21:04:09,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545179429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:04:09,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660637955] [2022-11-18 21:04:09,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:04:09,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:09,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:09,064 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:09,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8f59dc2-37a8-44c7-ac19-cb367c1dc2a4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 21:04:09,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-18 21:04:09,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:04:09,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 21:04:09,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:09,341 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:09,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:10,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660637955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:10,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:04:10,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-11-18 21:04:10,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030264130] [2022-11-18 21:04:10,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:10,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-18 21:04:10,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:10,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-18 21:04:10,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 21:04:10,070 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)