./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-01-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-01-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 652acbc8fb2d659424086f7ee4bd5fc2f45ff1d49f46cde68db4fdee1ed0638e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:20:48,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:20:48,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:20:48,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:20:48,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:20:48,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:20:48,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:20:48,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:20:48,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:20:48,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:20:48,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:20:48,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:20:48,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:20:48,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:20:48,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:20:48,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:20:48,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:20:48,944 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:20:48,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:20:48,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:20:48,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:20:48,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:20:48,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:20:48,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:20:48,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:20:48,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:20:48,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:20:48,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:20:48,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:20:48,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:20:48,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:20:48,965 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:20:48,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:20:48,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:20:48,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:20:48,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:20:48,970 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:20:48,970 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:20:48,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:20:48,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:20:48,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:20:48,974 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:20:49,002 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:20:49,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:20:49,003 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:20:49,003 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:20:49,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:20:49,004 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:20:49,004 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:20:49,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:20:49,005 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:20:49,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:20:49,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:20:49,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:20:49,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:20:49,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:20:49,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:20:49,006 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:20:49,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:20:49,007 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:20:49,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:20:49,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:20:49,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:20:49,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:20:49,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:20:49,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:20:49,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:20:49,008 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:20:49,009 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:20:49,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:20:49,009 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:20:49,009 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:20:49,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:20:49,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:20:49,011 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 652acbc8fb2d659424086f7ee4bd5fc2f45ff1d49f46cde68db4fdee1ed0638e [2021-11-02 23:20:49,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:20:49,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:20:49,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:20:49,344 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:20:49,345 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:20:49,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/forester-heap/dll-01-2.i [2021-11-02 23:20:49,422 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/data/3a82ba5dd/9ce37a1bba00463cb42281b47e2f236b/FLAG3f607cd16 [2021-11-02 23:20:50,032 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:20:50,037 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i [2021-11-02 23:20:50,063 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/data/3a82ba5dd/9ce37a1bba00463cb42281b47e2f236b/FLAG3f607cd16 [2021-11-02 23:20:50,293 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/data/3a82ba5dd/9ce37a1bba00463cb42281b47e2f236b [2021-11-02 23:20:50,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:20:50,296 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:20:50,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:20:50,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:20:50,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:20:50,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:20:50" (1/1) ... [2021-11-02 23:20:50,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@413d0cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:50, skipping insertion in model container [2021-11-02 23:20:50,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:20:50" (1/1) ... [2021-11-02 23:20:50,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:20:50,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:20:50,776 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[22080,22093] [2021-11-02 23:20:50,796 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[22353,22366] [2021-11-02 23:20:50,798 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[22587,22600] [2021-11-02 23:20:50,799 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[22657,22670] [2021-11-02 23:20:50,802 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[22924,22937] [2021-11-02 23:20:50,803 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23032,23045] [2021-11-02 23:20:50,804 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23263,23276] [2021-11-02 23:20:50,807 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23343,23356] [2021-11-02 23:20:50,808 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23422,23435] [2021-11-02 23:20:50,810 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23512,23525] [2021-11-02 23:20:50,816 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23690,23703] [2021-11-02 23:20:50,819 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23768,23781] [2021-11-02 23:20:50,821 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23845,23858] [2021-11-02 23:20:50,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:20:50,839 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:20:50,893 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[22080,22093] [2021-11-02 23:20:50,895 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[22353,22366] [2021-11-02 23:20:50,900 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[22587,22600] [2021-11-02 23:20:50,901 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[22657,22670] [2021-11-02 23:20:50,903 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[22924,22937] [2021-11-02 23:20:50,904 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23032,23045] [2021-11-02 23:20:50,906 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23263,23276] [2021-11-02 23:20:50,906 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23343,23356] [2021-11-02 23:20:50,907 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23422,23435] [2021-11-02 23:20:50,908 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23512,23525] [2021-11-02 23:20:50,909 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23690,23703] [2021-11-02 23:20:50,914 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23768,23781] [2021-11-02 23:20:50,915 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23845,23858] [2021-11-02 23:20:50,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:20:50,958 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:20:50,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:50 WrapperNode [2021-11-02 23:20:50,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:20:50,959 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:20:50,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:20:50,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:20:50,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:50" (1/1) ... [2021-11-02 23:20:51,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:50" (1/1) ... [2021-11-02 23:20:51,049 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:20:51,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:20:51,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:20:51,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:20:51,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:50" (1/1) ... [2021-11-02 23:20:51,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:50" (1/1) ... [2021-11-02 23:20:51,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:50" (1/1) ... [2021-11-02 23:20:51,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:50" (1/1) ... [2021-11-02 23:20:51,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:50" (1/1) ... [2021-11-02 23:20:51,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:50" (1/1) ... [2021-11-02 23:20:51,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:50" (1/1) ... [2021-11-02 23:20:51,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:20:51,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:20:51,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:20:51,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:20:51,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:50" (1/1) ... [2021-11-02 23:20:51,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:20:51,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:51,159 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:20:51,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:20:51,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 23:20:51,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 23:20:51,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:20:51,197 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 23:20:51,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 23:20:51,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:20:51,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:20:51,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:20:51,758 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:20:51,763 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2021-11-02 23:20:51,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:20:51 BoogieIcfgContainer [2021-11-02 23:20:51,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:20:51,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:20:51,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:20:51,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:20:51,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:20:50" (1/3) ... [2021-11-02 23:20:51,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d74e51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:20:51, skipping insertion in model container [2021-11-02 23:20:51,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:20:50" (2/3) ... [2021-11-02 23:20:51,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d74e51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:20:51, skipping insertion in model container [2021-11-02 23:20:51,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:20:51" (3/3) ... [2021-11-02 23:20:51,776 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-01-2.i [2021-11-02 23:20:51,782 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:20:51,782 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-11-02 23:20:51,844 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:20:51,853 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 23:20:51,853 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-11-02 23:20:51,873 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 69 states have (on average 1.9565217391304348) internal successors, (135), 82 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:51,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-02 23:20:51,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:51,880 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-02 23:20:51,881 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:20:51,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:51,887 INFO L85 PathProgramCache]: Analyzing trace with hash 925700, now seen corresponding path program 1 times [2021-11-02 23:20:51,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:51,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787673084] [2021-11-02 23:20:51,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:51,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:52,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:52,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787673084] [2021-11-02 23:20:52,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787673084] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:52,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:52,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:20:52,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176045617] [2021-11-02 23:20:52,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:20:52,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:52,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:20:52,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:20:52,133 INFO L87 Difference]: Start difference. First operand has 83 states, 69 states have (on average 1.9565217391304348) internal successors, (135), 82 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:52,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:52,234 INFO L93 Difference]: Finished difference Result 180 states and 296 transitions. [2021-11-02 23:20:52,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:20:52,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-02 23:20:52,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:52,244 INFO L225 Difference]: With dead ends: 180 [2021-11-02 23:20:52,244 INFO L226 Difference]: Without dead ends: 95 [2021-11-02 23:20:52,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:20:52,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-02 23:20:52,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2021-11-02 23:20:52,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.323076923076923) internal successors, (86), 76 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:52,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2021-11-02 23:20:52,282 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 4 [2021-11-02 23:20:52,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:52,283 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2021-11-02 23:20:52,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:52,283 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2021-11-02 23:20:52,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 23:20:52,284 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:52,284 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:52,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:20:52,284 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:20:52,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:52,285 INFO L85 PathProgramCache]: Analyzing trace with hash 261454926, now seen corresponding path program 1 times [2021-11-02 23:20:52,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:52,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257006213] [2021-11-02 23:20:52,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:52,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:52,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:52,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257006213] [2021-11-02 23:20:52,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257006213] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:52,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:52,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:20:52,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372853822] [2021-11-02 23:20:52,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:20:52,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:52,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:20:52,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:20:52,345 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:52,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:52,360 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2021-11-02 23:20:52,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:20:52,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-02 23:20:52,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:52,367 INFO L225 Difference]: With dead ends: 80 [2021-11-02 23:20:52,367 INFO L226 Difference]: Without dead ends: 78 [2021-11-02 23:20:52,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:20:52,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-02 23:20:52,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-02 23:20:52,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 77 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:52,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2021-11-02 23:20:52,376 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 10 [2021-11-02 23:20:52,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:52,377 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2021-11-02 23:20:52,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:52,377 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2021-11-02 23:20:52,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 23:20:52,381 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:52,381 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:52,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:20:52,382 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:20:52,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:52,388 INFO L85 PathProgramCache]: Analyzing trace with hash 261456848, now seen corresponding path program 1 times [2021-11-02 23:20:52,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:52,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536107453] [2021-11-02 23:20:52,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:52,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:52,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:52,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536107453] [2021-11-02 23:20:52,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536107453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:52,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:52,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:52,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678427313] [2021-11-02 23:20:52,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:52,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:52,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:52,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:52,477 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:52,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:52,594 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2021-11-02 23:20:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:52,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-02 23:20:52,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:52,596 INFO L225 Difference]: With dead ends: 80 [2021-11-02 23:20:52,597 INFO L226 Difference]: Without dead ends: 78 [2021-11-02 23:20:52,597 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:52,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-02 23:20:52,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2021-11-02 23:20:52,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 64 states have (on average 1.3125) internal successors, (84), 74 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2021-11-02 23:20:52,606 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 10 [2021-11-02 23:20:52,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:52,606 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2021-11-02 23:20:52,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:52,606 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2021-11-02 23:20:52,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 23:20:52,607 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:52,607 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:52,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 23:20:52,608 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:20:52,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:52,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1712619113, now seen corresponding path program 1 times [2021-11-02 23:20:52,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:52,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510857841] [2021-11-02 23:20:52,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:52,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:52,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:52,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510857841] [2021-11-02 23:20:52,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510857841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:52,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:52,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:52,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824971579] [2021-11-02 23:20:52,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:52,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:52,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:52,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:52,668 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:52,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:52,806 INFO L93 Difference]: Finished difference Result 195 states and 217 transitions. [2021-11-02 23:20:52,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:52,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-02 23:20:52,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:52,808 INFO L225 Difference]: With dead ends: 195 [2021-11-02 23:20:52,808 INFO L226 Difference]: Without dead ends: 128 [2021-11-02 23:20:52,809 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:20:52,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-02 23:20:52,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 77. [2021-11-02 23:20:52,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 66 states have (on average 1.303030303030303) internal successors, (86), 76 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:52,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2021-11-02 23:20:52,818 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 15 [2021-11-02 23:20:52,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:52,818 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2021-11-02 23:20:52,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:52,819 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2021-11-02 23:20:52,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 23:20:52,819 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:52,819 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:52,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 23:20:52,820 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:20:52,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:52,820 INFO L85 PathProgramCache]: Analyzing trace with hash 903272487, now seen corresponding path program 1 times [2021-11-02 23:20:52,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:52,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687756262] [2021-11-02 23:20:52,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:52,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:52,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:52,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687756262] [2021-11-02 23:20:52,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687756262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:52,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:52,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:20:52,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435945227] [2021-11-02 23:20:52,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:20:52,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:52,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:20:52,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:20:52,954 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:53,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:53,075 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2021-11-02 23:20:53,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:20:53,076 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-02 23:20:53,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:53,081 INFO L225 Difference]: With dead ends: 122 [2021-11-02 23:20:53,082 INFO L226 Difference]: Without dead ends: 118 [2021-11-02 23:20:53,082 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:20:53,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-02 23:20:53,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 73. [2021-11-02 23:20:53,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 64 states have (on average 1.28125) internal successors, (82), 72 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:53,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2021-11-02 23:20:53,108 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 15 [2021-11-02 23:20:53,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:53,113 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2021-11-02 23:20:53,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:53,114 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2021-11-02 23:20:53,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:20:53,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:53,115 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:53,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 23:20:53,115 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:20:53,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:53,116 INFO L85 PathProgramCache]: Analyzing trace with hash -2063319775, now seen corresponding path program 1 times [2021-11-02 23:20:53,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:53,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85339226] [2021-11-02 23:20:53,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:53,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:53,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:53,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85339226] [2021-11-02 23:20:53,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85339226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:53,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:53,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:53,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51345929] [2021-11-02 23:20:53,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:53,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:53,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:53,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:53,198 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:53,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:53,297 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2021-11-02 23:20:53,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:53,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-02 23:20:53,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:53,298 INFO L225 Difference]: With dead ends: 132 [2021-11-02 23:20:53,298 INFO L226 Difference]: Without dead ends: 112 [2021-11-02 23:20:53,299 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:20:53,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-02 23:20:53,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 72. [2021-11-02 23:20:53,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.265625) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:53,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2021-11-02 23:20:53,322 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 16 [2021-11-02 23:20:53,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:53,322 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2021-11-02 23:20:53,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:53,322 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2021-11-02 23:20:53,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 23:20:53,323 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:53,323 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:53,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 23:20:53,324 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:20:53,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:53,324 INFO L85 PathProgramCache]: Analyzing trace with hash -940628212, now seen corresponding path program 1 times [2021-11-02 23:20:53,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:53,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424039081] [2021-11-02 23:20:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:53,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:53,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:53,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424039081] [2021-11-02 23:20:53,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424039081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:53,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:53,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:20:53,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40837073] [2021-11-02 23:20:53,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:20:53,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:53,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:20:53,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:20:53,372 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:53,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:53,384 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2021-11-02 23:20:53,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:20:53,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-02 23:20:53,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:53,386 INFO L225 Difference]: With dead ends: 137 [2021-11-02 23:20:53,386 INFO L226 Difference]: Without dead ends: 96 [2021-11-02 23:20:53,386 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:20:53,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-02 23:20:53,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 75. [2021-11-02 23:20:53,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 74 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:53,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2021-11-02 23:20:53,394 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 20 [2021-11-02 23:20:53,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:53,394 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2021-11-02 23:20:53,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:53,394 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2021-11-02 23:20:53,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 23:20:53,395 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:53,395 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:53,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 23:20:53,395 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:20:53,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:53,396 INFO L85 PathProgramCache]: Analyzing trace with hash 905291998, now seen corresponding path program 1 times [2021-11-02 23:20:53,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:53,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156409772] [2021-11-02 23:20:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:53,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:53,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:53,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156409772] [2021-11-02 23:20:53,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156409772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:53,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:53,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:20:53,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436435546] [2021-11-02 23:20:53,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:20:53,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:53,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:20:53,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:20:53,451 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:53,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:53,464 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2021-11-02 23:20:53,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:20:53,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-02 23:20:53,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:53,465 INFO L225 Difference]: With dead ends: 75 [2021-11-02 23:20:53,465 INFO L226 Difference]: Without dead ends: 73 [2021-11-02 23:20:53,466 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:20:53,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-02 23:20:53,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-02 23:20:53,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 72 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2021-11-02 23:20:53,473 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 21 [2021-11-02 23:20:53,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:53,473 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2021-11-02 23:20:53,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:53,473 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2021-11-02 23:20:53,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 23:20:53,474 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:53,474 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:53,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 23:20:53,475 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:20:53,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:53,475 INFO L85 PathProgramCache]: Analyzing trace with hash 886650935, now seen corresponding path program 1 times [2021-11-02 23:20:53,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:53,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145951901] [2021-11-02 23:20:53,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:53,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:53,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:53,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145951901] [2021-11-02 23:20:53,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145951901] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:53,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:53,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:53,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557131189] [2021-11-02 23:20:53,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:53,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:53,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:53,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:53,558 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:53,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:53,622 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-11-02 23:20:53,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:53,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-02 23:20:53,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:53,623 INFO L225 Difference]: With dead ends: 74 [2021-11-02 23:20:53,624 INFO L226 Difference]: Without dead ends: 72 [2021-11-02 23:20:53,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:53,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-02 23:20:53,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-11-02 23:20:53,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:53,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-11-02 23:20:53,630 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 23 [2021-11-02 23:20:53,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:53,631 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-11-02 23:20:53,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:53,631 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-11-02 23:20:53,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:20:53,632 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:53,632 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:53,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 23:20:53,632 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:20:53,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:53,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1458355201, now seen corresponding path program 1 times [2021-11-02 23:20:53,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:53,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639076591] [2021-11-02 23:20:53,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:53,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:53,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:53,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639076591] [2021-11-02 23:20:53,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639076591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:53,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:53,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 23:20:53,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883638275] [2021-11-02 23:20:53,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:20:53,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:53,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:20:53,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:20:53,742 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:53,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:53,992 INFO L93 Difference]: Finished difference Result 175 states and 199 transitions. [2021-11-02 23:20:53,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:20:53,992 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 23:20:53,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:53,995 INFO L225 Difference]: With dead ends: 175 [2021-11-02 23:20:53,995 INFO L226 Difference]: Without dead ends: 133 [2021-11-02 23:20:53,996 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:20:53,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-02 23:20:54,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 81. [2021-11-02 23:20:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 80 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:54,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2021-11-02 23:20:54,013 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 24 [2021-11-02 23:20:54,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:54,014 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2021-11-02 23:20:54,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:54,014 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2021-11-02 23:20:54,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:20:54,015 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:54,015 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:54,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 23:20:54,015 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:20:54,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:54,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1357759361, now seen corresponding path program 1 times [2021-11-02 23:20:54,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:54,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837103874] [2021-11-02 23:20:54,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:54,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:54,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:54,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837103874] [2021-11-02 23:20:54,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837103874] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:54,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:54,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 23:20:54,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923863788] [2021-11-02 23:20:54,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:20:54,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:54,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:20:54,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:20:54,260 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:54,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:54,722 INFO L93 Difference]: Finished difference Result 232 states and 257 transitions. [2021-11-02 23:20:54,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:20:54,723 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 23:20:54,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:54,726 INFO L225 Difference]: With dead ends: 232 [2021-11-02 23:20:54,726 INFO L226 Difference]: Without dead ends: 230 [2021-11-02 23:20:54,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:20:54,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-02 23:20:54,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 93. [2021-11-02 23:20:54,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 92 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2021-11-02 23:20:54,756 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 24 [2021-11-02 23:20:54,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:54,756 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2021-11-02 23:20:54,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:54,757 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2021-11-02 23:20:54,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:20:54,761 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:54,761 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:54,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 23:20:54,762 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:20:54,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:54,764 INFO L85 PathProgramCache]: Analyzing trace with hash 680714775, now seen corresponding path program 1 times [2021-11-02 23:20:54,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:54,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843904968] [2021-11-02 23:20:54,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:54,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:20:54,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:54,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843904968] [2021-11-02 23:20:54,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843904968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:54,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:54,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:20:54,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034678759] [2021-11-02 23:20:54,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:20:54,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:54,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:20:54,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:20:54,871 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:54,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:54,991 INFO L93 Difference]: Finished difference Result 140 states and 159 transitions. [2021-11-02 23:20:54,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:20:54,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-02 23:20:54,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:54,992 INFO L225 Difference]: With dead ends: 140 [2021-11-02 23:20:54,993 INFO L226 Difference]: Without dead ends: 122 [2021-11-02 23:20:54,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:20:54,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-02 23:20:55,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2021-11-02 23:20:55,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 107 states have (on average 1.2429906542056075) internal successors, (133), 112 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:55,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 133 transitions. [2021-11-02 23:20:55,003 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 133 transitions. Word has length 26 [2021-11-02 23:20:55,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:55,003 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 133 transitions. [2021-11-02 23:20:55,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:55,004 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 133 transitions. [2021-11-02 23:20:55,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:20:55,005 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:55,005 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:55,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 23:20:55,005 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:20:55,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:55,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1502606953, now seen corresponding path program 1 times [2021-11-02 23:20:55,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:55,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315192897] [2021-11-02 23:20:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:55,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:55,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:20:55,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:55,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315192897] [2021-11-02 23:20:55,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315192897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:55,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:55,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:20:55,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819500125] [2021-11-02 23:20:55,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:20:55,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:55,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:20:55,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:20:55,054 INFO L87 Difference]: Start difference. First operand 113 states and 133 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:55,099 INFO L93 Difference]: Finished difference Result 114 states and 134 transitions. [2021-11-02 23:20:55,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:20:55,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-02 23:20:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:55,101 INFO L225 Difference]: With dead ends: 114 [2021-11-02 23:20:55,101 INFO L226 Difference]: Without dead ends: 112 [2021-11-02 23:20:55,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:20:55,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-02 23:20:55,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-11-02 23:20:55,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.2358490566037736) internal successors, (131), 110 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2021-11-02 23:20:55,109 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 26 [2021-11-02 23:20:55,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:55,109 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2021-11-02 23:20:55,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:55,110 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2021-11-02 23:20:55,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 23:20:55,111 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:55,111 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:55,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 23:20:55,112 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:20:55,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:55,112 INFO L85 PathProgramCache]: Analyzing trace with hash -988757936, now seen corresponding path program 1 times [2021-11-02 23:20:55,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:55,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792611514] [2021-11-02 23:20:55,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:55,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:55,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:55,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792611514] [2021-11-02 23:20:55,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792611514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:55,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:55,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 23:20:55,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131452041] [2021-11-02 23:20:55,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:20:55,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:55,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:20:55,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:20:55,240 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:55,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:55,585 INFO L93 Difference]: Finished difference Result 266 states and 306 transitions. [2021-11-02 23:20:55,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:20:55,585 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-02 23:20:55,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:55,588 INFO L225 Difference]: With dead ends: 266 [2021-11-02 23:20:55,588 INFO L226 Difference]: Without dead ends: 264 [2021-11-02 23:20:55,590 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:20:55,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-02 23:20:55,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 114. [2021-11-02 23:20:55,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.2293577981651376) internal successors, (134), 113 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:55,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 134 transitions. [2021-11-02 23:20:55,602 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 134 transitions. Word has length 27 [2021-11-02 23:20:55,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:55,602 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 134 transitions. [2021-11-02 23:20:55,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:55,603 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 134 transitions. [2021-11-02 23:20:55,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 23:20:55,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:55,606 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:55,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 23:20:55,606 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:20:55,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:55,607 INFO L85 PathProgramCache]: Analyzing trace with hash -937634650, now seen corresponding path program 1 times [2021-11-02 23:20:55,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:55,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656945680] [2021-11-02 23:20:55,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:55,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:55,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:55,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656945680] [2021-11-02 23:20:55,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656945680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:55,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008088241] [2021-11-02 23:20:55,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:55,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:55,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:55,706 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:55,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:20:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:55,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 23:20:55,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:55,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:20:55,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-02 23:20:55,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:20:55,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-02 23:20:56,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:20:56,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:20:56,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:20:56,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 23:20:56,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-02 23:20:56,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:20:56,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:20:56,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:20:56,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-02 23:20:56,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 23:20:56,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 41 [2021-11-02 23:20:56,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 23:20:56,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 16 [2021-11-02 23:20:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:56,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008088241] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:56,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:56,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-11-02 23:20:56,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722561502] [2021-11-02 23:20:56,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:20:56,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:56,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:20:56,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:20:56,583 INFO L87 Difference]: Start difference. First operand 114 states and 134 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:56,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:56,896 INFO L93 Difference]: Finished difference Result 218 states and 250 transitions. [2021-11-02 23:20:56,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:20:56,896 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-02 23:20:56,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:56,897 INFO L225 Difference]: With dead ends: 218 [2021-11-02 23:20:56,898 INFO L226 Difference]: Without dead ends: 158 [2021-11-02 23:20:56,898 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:20:56,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-02 23:20:56,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 116. [2021-11-02 23:20:56,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.2072072072072073) internal successors, (134), 115 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:56,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2021-11-02 23:20:56,907 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 29 [2021-11-02 23:20:56,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:56,910 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2021-11-02 23:20:56,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:56,910 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2021-11-02 23:20:56,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 23:20:56,914 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:56,914 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:56,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-02 23:20:57,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 23:20:57,142 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:20:57,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:57,142 INFO L85 PathProgramCache]: Analyzing trace with hash -2010394174, now seen corresponding path program 1 times [2021-11-02 23:20:57,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:57,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773082823] [2021-11-02 23:20:57,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:57,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:20:57,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:57,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773082823] [2021-11-02 23:20:57,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773082823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:57,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:57,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 23:20:57,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589712020] [2021-11-02 23:20:57,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:20:57,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:57,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:20:57,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:20:57,280 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:57,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:57,566 INFO L93 Difference]: Finished difference Result 178 states and 198 transitions. [2021-11-02 23:20:57,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:20:57,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-02 23:20:57,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:57,568 INFO L225 Difference]: With dead ends: 178 [2021-11-02 23:20:57,568 INFO L226 Difference]: Without dead ends: 176 [2021-11-02 23:20:57,568 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:20:57,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-02 23:20:57,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 122. [2021-11-02 23:20:57,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.205128205128205) internal successors, (141), 121 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:57,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2021-11-02 23:20:57,589 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 29 [2021-11-02 23:20:57,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:57,589 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2021-11-02 23:20:57,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:57,589 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2021-11-02 23:20:57,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 23:20:57,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:57,590 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:57,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 23:20:57,590 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:20:57,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:57,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1521997910, now seen corresponding path program 1 times [2021-11-02 23:20:57,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:57,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400824088] [2021-11-02 23:20:57,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:57,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:57,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:57,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400824088] [2021-11-02 23:20:57,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400824088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:57,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:57,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:20:57,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258145357] [2021-11-02 23:20:57,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:20:57,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:57,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:20:57,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:20:57,636 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:57,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:57,656 INFO L93 Difference]: Finished difference Result 239 states and 280 transitions. [2021-11-02 23:20:57,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:20:57,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-02 23:20:57,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:57,658 INFO L225 Difference]: With dead ends: 239 [2021-11-02 23:20:57,658 INFO L226 Difference]: Without dead ends: 178 [2021-11-02 23:20:57,660 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:20:57,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-02 23:20:57,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 144. [2021-11-02 23:20:57,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.2158273381294964) internal successors, (169), 143 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:57,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 169 transitions. [2021-11-02 23:20:57,671 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 169 transitions. Word has length 31 [2021-11-02 23:20:57,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:57,671 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 169 transitions. [2021-11-02 23:20:57,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:57,672 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 169 transitions. [2021-11-02 23:20:57,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:20:57,672 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:57,673 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:57,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 23:20:57,674 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:20:57,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:57,674 INFO L85 PathProgramCache]: Analyzing trace with hash 914215427, now seen corresponding path program 1 times [2021-11-02 23:20:57,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:57,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747449342] [2021-11-02 23:20:57,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:57,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:57,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:57,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:57,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747449342] [2021-11-02 23:20:57,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747449342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:57,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303084991] [2021-11-02 23:20:57,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:57,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:57,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:57,802 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:57,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:20:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:57,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:20:57,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:57,947 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-02 23:20:57,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-11-02 23:20:57,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:20:57,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-02 23:20:58,038 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-02 23:20:58,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-11-02 23:20:58,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:20:58,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:20:58,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:20:58,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-02 23:20:58,500 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-02 23:20:58,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 45 [2021-11-02 23:20:58,507 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-02 23:20:58,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 16 [2021-11-02 23:20:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:20:58,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303084991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:58,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:58,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-11-02 23:20:58,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545906227] [2021-11-02 23:20:58,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:20:58,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:58,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:20:58,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:20:58,528 INFO L87 Difference]: Start difference. First operand 144 states and 169 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:58,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:58,956 INFO L93 Difference]: Finished difference Result 280 states and 318 transitions. [2021-11-02 23:20:58,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:20:58,957 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:20:58,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:58,958 INFO L225 Difference]: With dead ends: 280 [2021-11-02 23:20:58,958 INFO L226 Difference]: Without dead ends: 232 [2021-11-02 23:20:58,959 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:20:58,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-02 23:20:58,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 171. [2021-11-02 23:20:58,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.2349397590361446) internal successors, (205), 170 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:58,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 205 transitions. [2021-11-02 23:20:58,971 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 205 transitions. Word has length 32 [2021-11-02 23:20:58,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:58,971 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 205 transitions. [2021-11-02 23:20:58,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:58,972 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 205 transitions. [2021-11-02 23:20:58,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:20:58,973 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:58,973 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:59,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:59,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 23:20:59,194 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:20:59,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:59,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1670306697, now seen corresponding path program 1 times [2021-11-02 23:20:59,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:59,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288623652] [2021-11-02 23:20:59,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:59,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:20:59,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:59,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288623652] [2021-11-02 23:20:59,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288623652] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:59,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:59,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 23:20:59,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931475054] [2021-11-02 23:20:59,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:20:59,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:59,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:20:59,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:20:59,319 INFO L87 Difference]: Start difference. First operand 171 states and 205 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:59,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:59,542 INFO L93 Difference]: Finished difference Result 203 states and 234 transitions. [2021-11-02 23:20:59,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:20:59,543 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:20:59,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:59,544 INFO L225 Difference]: With dead ends: 203 [2021-11-02 23:20:59,544 INFO L226 Difference]: Without dead ends: 188 [2021-11-02 23:20:59,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:20:59,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-02 23:20:59,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 161. [2021-11-02 23:20:59,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.2307692307692308) internal successors, (192), 160 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:59,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 192 transitions. [2021-11-02 23:20:59,570 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 192 transitions. Word has length 32 [2021-11-02 23:20:59,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:59,571 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 192 transitions. [2021-11-02 23:20:59,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:59,571 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 192 transitions. [2021-11-02 23:20:59,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 23:20:59,572 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:59,572 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:59,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 23:20:59,573 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:20:59,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:59,573 INFO L85 PathProgramCache]: Analyzing trace with hash 191981961, now seen corresponding path program 1 times [2021-11-02 23:20:59,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:59,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366277953] [2021-11-02 23:20:59,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:59,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:59,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:59,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366277953] [2021-11-02 23:20:59,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366277953] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:59,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:59,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:20:59,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886834214] [2021-11-02 23:20:59,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:20:59,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:59,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:20:59,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:20:59,627 INFO L87 Difference]: Start difference. First operand 161 states and 192 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:59,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:59,714 INFO L93 Difference]: Finished difference Result 223 states and 263 transitions. [2021-11-02 23:20:59,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:20:59,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-02 23:20:59,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:59,715 INFO L225 Difference]: With dead ends: 223 [2021-11-02 23:20:59,715 INFO L226 Difference]: Without dead ends: 97 [2021-11-02 23:20:59,716 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:20:59,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-02 23:20:59,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2021-11-02 23:20:59,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 91 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:59,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2021-11-02 23:20:59,722 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 35 [2021-11-02 23:20:59,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:59,722 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2021-11-02 23:20:59,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:59,722 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2021-11-02 23:20:59,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 23:20:59,723 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:59,723 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:59,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 23:20:59,723 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:20:59,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:59,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1562646056, now seen corresponding path program 1 times [2021-11-02 23:20:59,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:59,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006804250] [2021-11-02 23:20:59,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:59,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:59,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:59,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006804250] [2021-11-02 23:20:59,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006804250] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:59,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791338939] [2021-11-02 23:20:59,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:59,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:59,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:59,934 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:59,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:21:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:00,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:21:00,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:00,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:21:00,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:21:00,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:21:00,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:00,362 INFO L354 Elim1Store]: treesize reduction 134, result has 17.3 percent of original size [2021-11-02 23:21:00,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 143 [2021-11-02 23:21:00,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:00,410 INFO L354 Elim1Store]: treesize reduction 154, result has 17.2 percent of original size [2021-11-02 23:21:00,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 126 [2021-11-02 23:21:00,439 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-02 23:21:00,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 123 [2021-11-02 23:21:01,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:01,419 INFO L354 Elim1Store]: treesize reduction 152, result has 19.6 percent of original size [2021-11-02 23:21:01,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 131 treesize of output 116 [2021-11-02 23:21:01,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:01,471 INFO L354 Elim1Store]: treesize reduction 188, result has 19.3 percent of original size [2021-11-02 23:21:01,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 132 treesize of output 142 [2021-11-02 23:21:05,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~end~0.offset] [2021-11-02 23:21:05,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:21:05,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 23:21:05,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127062236] [2021-11-02 23:21:05,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:21:05,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:05,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:21:05,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=95, Unknown=1, NotChecked=0, Total=132 [2021-11-02 23:21:05,723 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:06,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:06,245 INFO L93 Difference]: Finished difference Result 258 states and 290 transitions. [2021-11-02 23:21:06,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 23:21:06,246 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-02 23:21:06,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:06,247 INFO L225 Difference]: With dead ends: 258 [2021-11-02 23:21:06,247 INFO L226 Difference]: Without dead ends: 198 [2021-11-02 23:21:06,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=118, Invalid=343, Unknown=1, NotChecked=0, Total=462 [2021-11-02 23:21:06,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-02 23:21:06,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 113. [2021-11-02 23:21:06,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 109 states have (on average 1.18348623853211) internal successors, (129), 112 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:06,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2021-11-02 23:21:06,256 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 36 [2021-11-02 23:21:06,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:06,256 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2021-11-02 23:21:06,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:06,256 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2021-11-02 23:21:06,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 23:21:06,256 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:06,256 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:06,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:06,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:06,477 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:21:06,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:06,477 INFO L85 PathProgramCache]: Analyzing trace with hash -431498650, now seen corresponding path program 1 times [2021-11-02 23:21:06,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:06,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656262596] [2021-11-02 23:21:06,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:06,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:06,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:06,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656262596] [2021-11-02 23:21:06,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656262596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:21:06,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:21:06,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 23:21:06,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586185640] [2021-11-02 23:21:06,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:21:06,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:06,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:21:06,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:21:06,583 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:06,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:06,776 INFO L93 Difference]: Finished difference Result 219 states and 247 transitions. [2021-11-02 23:21:06,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:21:06,778 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-02 23:21:06,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:06,779 INFO L225 Difference]: With dead ends: 219 [2021-11-02 23:21:06,779 INFO L226 Difference]: Without dead ends: 142 [2021-11-02 23:21:06,779 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:21:06,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-02 23:21:06,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 115. [2021-11-02 23:21:06,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 111 states have (on average 1.1801801801801801) internal successors, (131), 114 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:06,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 131 transitions. [2021-11-02 23:21:06,787 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 131 transitions. Word has length 36 [2021-11-02 23:21:06,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:06,787 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 131 transitions. [2021-11-02 23:21:06,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:06,787 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 131 transitions. [2021-11-02 23:21:06,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 23:21:06,787 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:06,788 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:06,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-02 23:21:06,788 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:21:06,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:06,788 INFO L85 PathProgramCache]: Analyzing trace with hash 589569704, now seen corresponding path program 1 times [2021-11-02 23:21:06,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:06,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579502330] [2021-11-02 23:21:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:06,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:07,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:07,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579502330] [2021-11-02 23:21:07,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579502330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:07,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255805635] [2021-11-02 23:21:07,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:07,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:07,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:07,010 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:07,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 23:21:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:07,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 23:21:07,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:07,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:21:07,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:21:07,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:21:07,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:07,563 INFO L354 Elim1Store]: treesize reduction 134, result has 17.3 percent of original size [2021-11-02 23:21:07,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 156 [2021-11-02 23:21:07,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:07,610 INFO L354 Elim1Store]: treesize reduction 134, result has 17.3 percent of original size [2021-11-02 23:21:07,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 115 [2021-11-02 23:21:07,631 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-02 23:21:07,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 133 treesize of output 137 [2021-11-02 23:21:08,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:08,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:09,139 INFO L354 Elim1Store]: treesize reduction 818, result has 12.3 percent of original size [2021-11-02 23:21:09,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 690 treesize of output 463 [2021-11-02 23:21:09,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:09,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:09,389 INFO L354 Elim1Store]: treesize reduction 1180, result has 8.9 percent of original size [2021-11-02 23:21:09,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 591 treesize of output 534 [2021-11-02 23:21:09,440 INFO L354 Elim1Store]: treesize reduction 20, result has 62.3 percent of original size [2021-11-02 23:21:09,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 539 treesize of output 551 [2021-11-02 23:21:09,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:09,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:09,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:09,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:09,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:09,574 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 23:21:09,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 94 treesize of output 42 [2021-11-02 23:21:09,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:09,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:09,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:09,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:09,655 INFO L354 Elim1Store]: treesize reduction 41, result has 32.8 percent of original size [2021-11-02 23:21:09,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 105 treesize of output 64 [2021-11-02 23:21:09,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:09,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 32 [2021-11-02 23:21:09,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:09,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:09,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:09,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:09,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:09,801 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 23:21:09,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 94 treesize of output 42 [2021-11-02 23:21:09,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:09,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:09,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:09,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:09,950 INFO L354 Elim1Store]: treesize reduction 51, result has 16.4 percent of original size [2021-11-02 23:21:09,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 101 treesize of output 49 [2021-11-02 23:21:09,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:09,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:10,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:10,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:10,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:10,009 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 23:21:10,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 36 [2021-11-02 23:21:10,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:10,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:10,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:10,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:10,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:10,059 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 23:21:10,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 36 [2021-11-02 23:21:16,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~end~0.offset] [2021-11-02 23:21:16,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:21:16,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 23:21:16,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042935585] [2021-11-02 23:21:16,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:21:16,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:16,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:21:16,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:21:16,345 INFO L87 Difference]: Start difference. First operand 115 states and 131 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:16,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:16,999 INFO L93 Difference]: Finished difference Result 271 states and 306 transitions. [2021-11-02 23:21:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:21:17,000 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-02 23:21:17,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:17,001 INFO L225 Difference]: With dead ends: 271 [2021-11-02 23:21:17,001 INFO L226 Difference]: Without dead ends: 211 [2021-11-02 23:21:17,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:21:17,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-02 23:21:17,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 117. [2021-11-02 23:21:17,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 113 states have (on average 1.176991150442478) internal successors, (133), 116 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:17,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 133 transitions. [2021-11-02 23:21:17,011 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 133 transitions. Word has length 36 [2021-11-02 23:21:17,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:17,011 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 133 transitions. [2021-11-02 23:21:17,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:17,011 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 133 transitions. [2021-11-02 23:21:17,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 23:21:17,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:17,012 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:17,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:17,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-02 23:21:17,213 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:21:17,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:17,213 INFO L85 PathProgramCache]: Analyzing trace with hash 878042536, now seen corresponding path program 1 times [2021-11-02 23:21:17,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:17,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162282787] [2021-11-02 23:21:17,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:17,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:17,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:17,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162282787] [2021-11-02 23:21:17,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162282787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:17,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679082874] [2021-11-02 23:21:17,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:17,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:17,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:17,536 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:17,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 23:21:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:17,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-02 23:21:17,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:17,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:21:17,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:17,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:17,977 INFO L354 Elim1Store]: treesize reduction 190, result has 8.2 percent of original size [2021-11-02 23:21:17,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 157 treesize of output 146 [2021-11-02 23:21:18,001 INFO L354 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2021-11-02 23:21:18,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 197 treesize of output 201 [2021-11-02 23:21:18,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:18,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:18,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:18,012 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-02 23:21:18,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 88 [2021-11-02 23:21:18,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:18,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:18,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:18,458 INFO L354 Elim1Store]: treesize reduction 340, result has 13.7 percent of original size [2021-11-02 23:21:18,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 245 treesize of output 220 [2021-11-02 23:21:18,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:18,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:18,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:18,537 INFO L354 Elim1Store]: treesize reduction 250, result has 14.4 percent of original size [2021-11-02 23:21:18,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 204 treesize of output 152 [2021-11-02 23:21:18,555 INFO L354 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2021-11-02 23:21:18,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 193 [2021-11-02 23:21:19,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:19,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:19,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:19,611 INFO L354 Elim1Store]: treesize reduction 264, result has 16.2 percent of original size [2021-11-02 23:21:19,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 198 treesize of output 158 [2021-11-02 23:21:19,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:19,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:19,675 INFO L354 Elim1Store]: treesize reduction 390, result has 15.4 percent of original size [2021-11-02 23:21:19,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 199 treesize of output 215 [2021-11-02 23:21:22,596 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~end~0.offset] [2021-11-02 23:21:22,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:21:22,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-02 23:21:22,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450820519] [2021-11-02 23:21:22,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:21:22,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:22,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:21:22,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:21:22,598 INFO L87 Difference]: Start difference. First operand 117 states and 133 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:23,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:23,584 INFO L93 Difference]: Finished difference Result 238 states and 265 transitions. [2021-11-02 23:21:23,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 23:21:23,585 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-02 23:21:23,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:23,587 INFO L225 Difference]: With dead ends: 238 [2021-11-02 23:21:23,587 INFO L226 Difference]: Without dead ends: 236 [2021-11-02 23:21:23,587 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:21:23,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-02 23:21:23,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 139. [2021-11-02 23:21:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 135 states have (on average 1.1777777777777778) internal successors, (159), 138 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:23,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 159 transitions. [2021-11-02 23:21:23,597 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 159 transitions. Word has length 36 [2021-11-02 23:21:23,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:23,598 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 159 transitions. [2021-11-02 23:21:23,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:23,598 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 159 transitions. [2021-11-02 23:21:23,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 23:21:23,599 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:23,599 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:23,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:23,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 23:21:23,822 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:21:23,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:23,822 INFO L85 PathProgramCache]: Analyzing trace with hash -95033816, now seen corresponding path program 1 times [2021-11-02 23:21:23,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:23,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622210842] [2021-11-02 23:21:23,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:23,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:24,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:24,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622210842] [2021-11-02 23:21:24,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622210842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:24,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223246950] [2021-11-02 23:21:24,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:24,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:24,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:24,264 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:24,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 23:21:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:24,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-02 23:21:24,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:24,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:21:24,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:24,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:24,741 INFO L354 Elim1Store]: treesize reduction 190, result has 8.2 percent of original size [2021-11-02 23:21:24,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 157 treesize of output 146 [2021-11-02 23:21:24,765 INFO L354 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2021-11-02 23:21:24,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 197 treesize of output 201 [2021-11-02 23:21:24,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:24,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:24,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:24,782 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-02 23:21:24,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 88 [2021-11-02 23:21:25,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:25,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:25,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:25,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:25,161 INFO L354 Elim1Store]: treesize reduction 152, result has 21.6 percent of original size [2021-11-02 23:21:25,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 220 treesize of output 168 [2021-11-02 23:21:25,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:25,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:25,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:25,221 INFO L354 Elim1Store]: treesize reduction 234, result has 18.8 percent of original size [2021-11-02 23:21:25,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 211 treesize of output 170 [2021-11-02 23:21:25,253 INFO L354 Elim1Store]: treesize reduction 84, result has 31.7 percent of original size [2021-11-02 23:21:25,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 161 treesize of output 182 [2021-11-02 23:21:25,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:25,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:25,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:26,503 INFO L354 Elim1Store]: treesize reduction 1090, result has 11.9 percent of original size [2021-11-02 23:21:26,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 31 case distinctions, treesize of input 751 treesize of output 517 [2021-11-02 23:21:26,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:26,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:26,774 INFO L354 Elim1Store]: treesize reduction 1574, result has 9.0 percent of original size [2021-11-02 23:21:26,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 692 treesize of output 655 [2021-11-02 23:21:26,831 INFO L354 Elim1Store]: treesize reduction 70, result has 35.8 percent of original size [2021-11-02 23:21:26,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 675 treesize of output 685 [2021-11-02 23:21:26,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:26,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:26,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:26,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:26,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:26,920 INFO L354 Elim1Store]: treesize reduction 74, result has 1.3 percent of original size [2021-11-02 23:21:26,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 158 treesize of output 72 [2021-11-02 23:21:27,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:27,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:27,591 INFO L354 Elim1Store]: treesize reduction 254, result has 10.9 percent of original size [2021-11-02 23:21:27,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 34 case distinctions, treesize of input 354 treesize of output 250 [2021-11-02 23:21:28,995 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~end~0.offset] [2021-11-02 23:21:28,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:21:28,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 23:21:28,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738663926] [2021-11-02 23:21:28,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:21:28,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:28,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:21:28,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:21:28,997 INFO L87 Difference]: Start difference. First operand 139 states and 159 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:29,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:29,739 INFO L93 Difference]: Finished difference Result 231 states and 256 transitions. [2021-11-02 23:21:29,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:21:29,740 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-02 23:21:29,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:29,742 INFO L225 Difference]: With dead ends: 231 [2021-11-02 23:21:29,742 INFO L226 Difference]: Without dead ends: 229 [2021-11-02 23:21:29,742 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:21:29,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-02 23:21:29,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 117. [2021-11-02 23:21:29,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 113 states have (on average 1.168141592920354) internal successors, (132), 116 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:29,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 132 transitions. [2021-11-02 23:21:29,754 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 132 transitions. Word has length 36 [2021-11-02 23:21:29,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:29,754 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 132 transitions. [2021-11-02 23:21:29,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:29,754 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 132 transitions. [2021-11-02 23:21:29,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-02 23:21:29,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:29,755 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:29,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:29,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 23:21:29,982 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:21:29,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:29,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1418469577, now seen corresponding path program 1 times [2021-11-02 23:21:29,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:29,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34921040] [2021-11-02 23:21:29,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:29,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:30,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:30,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34921040] [2021-11-02 23:21:30,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34921040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:30,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822120804] [2021-11-02 23:21:30,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:30,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:30,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:30,253 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:30,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 23:21:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:30,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-02 23:21:30,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:30,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:21:30,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:30,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:30,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:30,823 INFO L354 Elim1Store]: treesize reduction 87, result has 9.4 percent of original size [2021-11-02 23:21:30,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 287 treesize of output 209 [2021-11-02 23:21:30,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:30,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:30,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:30,836 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-02 23:21:30,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 63 [2021-11-02 23:21:30,850 INFO L354 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2021-11-02 23:21:30,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 94 [2021-11-02 23:21:31,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:31,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:31,254 INFO L354 Elim1Store]: treesize reduction 340, result has 13.7 percent of original size [2021-11-02 23:21:31,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 245 treesize of output 220 [2021-11-02 23:21:31,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:31,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:31,344 INFO L354 Elim1Store]: treesize reduction 250, result has 14.4 percent of original size [2021-11-02 23:21:31,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 204 treesize of output 152 [2021-11-02 23:21:31,364 INFO L354 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2021-11-02 23:21:31,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 193 [2021-11-02 23:21:32,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:32,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:32,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:32,590 INFO L354 Elim1Store]: treesize reduction 264, result has 16.2 percent of original size [2021-11-02 23:21:32,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 198 treesize of output 158 [2021-11-02 23:21:32,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:32,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:32,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:32,662 INFO L354 Elim1Store]: treesize reduction 390, result has 15.4 percent of original size [2021-11-02 23:21:32,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 199 treesize of output 215 [2021-11-02 23:21:37,136 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~end~0.offset] [2021-11-02 23:21:37,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:21:37,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-02 23:21:37,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980552263] [2021-11-02 23:21:37,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:21:37,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:37,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:21:37,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=142, Unknown=1, NotChecked=0, Total=182 [2021-11-02 23:21:37,138 INFO L87 Difference]: Start difference. First operand 117 states and 132 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:37,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:37,994 INFO L93 Difference]: Finished difference Result 229 states and 254 transitions. [2021-11-02 23:21:37,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:21:37,995 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-02 23:21:37,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:37,996 INFO L225 Difference]: With dead ends: 229 [2021-11-02 23:21:37,996 INFO L226 Difference]: Without dead ends: 227 [2021-11-02 23:21:37,997 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=113, Invalid=392, Unknown=1, NotChecked=0, Total=506 [2021-11-02 23:21:37,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-02 23:21:38,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2021-11-02 23:21:38,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 138 states have (on average 1.1666666666666667) internal successors, (161), 141 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:38,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 161 transitions. [2021-11-02 23:21:38,007 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 161 transitions. Word has length 39 [2021-11-02 23:21:38,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:38,008 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 161 transitions. [2021-11-02 23:21:38,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:38,008 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 161 transitions. [2021-11-02 23:21:38,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-02 23:21:38,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:38,009 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:38,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:38,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 23:21:38,217 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:21:38,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:38,217 INFO L85 PathProgramCache]: Analyzing trace with hash -764852151, now seen corresponding path program 1 times [2021-11-02 23:21:38,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:38,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690998484] [2021-11-02 23:21:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:38,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:38,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:38,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690998484] [2021-11-02 23:21:38,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690998484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:38,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418348512] [2021-11-02 23:21:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:38,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:38,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:38,566 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:38,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 23:21:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:39,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-02 23:21:39,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:39,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:21:39,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:39,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:39,345 INFO L354 Elim1Store]: treesize reduction 190, result has 8.2 percent of original size [2021-11-02 23:21:39,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 157 treesize of output 146 [2021-11-02 23:21:39,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:39,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:39,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:39,359 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-02 23:21:39,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 90 [2021-11-02 23:21:39,371 INFO L354 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2021-11-02 23:21:39,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 94 [2021-11-02 23:21:39,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:39,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:39,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:39,726 INFO L354 Elim1Store]: treesize reduction 222, result has 18.4 percent of original size [2021-11-02 23:21:39,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 248 treesize of output 219 [2021-11-02 23:21:39,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:39,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:39,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:39,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:39,775 INFO L354 Elim1Store]: treesize reduction 152, result has 21.6 percent of original size [2021-11-02 23:21:39,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 182 treesize of output 130 [2021-11-02 23:21:39,801 INFO L354 Elim1Store]: treesize reduction 84, result has 31.7 percent of original size [2021-11-02 23:21:39,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 161 treesize of output 182 [2021-11-02 23:21:40,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:40,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:40,851 INFO L354 Elim1Store]: treesize reduction 1090, result has 11.9 percent of original size [2021-11-02 23:21:40,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 31 case distinctions, treesize of input 751 treesize of output 517 [2021-11-02 23:21:40,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:40,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:41,127 INFO L354 Elim1Store]: treesize reduction 1574, result has 9.0 percent of original size [2021-11-02 23:21:41,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 692 treesize of output 655 [2021-11-02 23:21:41,168 INFO L354 Elim1Store]: treesize reduction 70, result has 35.8 percent of original size [2021-11-02 23:21:41,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 657 treesize of output 667 [2021-11-02 23:21:41,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:41,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:41,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:41,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:41,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:41,268 INFO L354 Elim1Store]: treesize reduction 74, result has 1.3 percent of original size [2021-11-02 23:21:41,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 9 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 131 treesize of output 51 [2021-11-02 23:21:41,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:41,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:41,888 INFO L354 Elim1Store]: treesize reduction 254, result has 10.9 percent of original size [2021-11-02 23:21:41,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 34 case distinctions, treesize of input 354 treesize of output 250 [2021-11-02 23:21:43,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~end~0.offset] [2021-11-02 23:21:43,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:21:43,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 23:21:43,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998207211] [2021-11-02 23:21:43,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:21:43,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:43,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:21:43,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:21:43,297 INFO L87 Difference]: Start difference. First operand 142 states and 161 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:44,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:44,087 INFO L93 Difference]: Finished difference Result 232 states and 257 transitions. [2021-11-02 23:21:44,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:21:44,087 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-02 23:21:44,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:44,089 INFO L225 Difference]: With dead ends: 232 [2021-11-02 23:21:44,089 INFO L226 Difference]: Without dead ends: 230 [2021-11-02 23:21:44,089 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:21:44,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-02 23:21:44,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 117. [2021-11-02 23:21:44,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 116 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:44,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2021-11-02 23:21:44,098 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 39 [2021-11-02 23:21:44,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:44,099 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2021-11-02 23:21:44,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:44,099 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2021-11-02 23:21:44,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 23:21:44,100 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:44,100 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:44,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:44,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 23:21:44,314 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:21:44,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:44,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1206775941, now seen corresponding path program 1 times [2021-11-02 23:21:44,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:44,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037447766] [2021-11-02 23:21:44,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:44,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:44,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:44,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037447766] [2021-11-02 23:21:44,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037447766] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:44,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592858377] [2021-11-02 23:21:44,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:44,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:44,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:44,394 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:44,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 23:21:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:45,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:21:45,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:45,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:21:45,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:45,194 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-02 23:21:45,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 43 [2021-11-02 23:21:45,200 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-02 23:21:45,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2021-11-02 23:21:45,388 INFO L354 Elim1Store]: treesize reduction 82, result has 25.5 percent of original size [2021-11-02 23:21:45,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 58 [2021-11-02 23:21:45,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~end~0.offset] [2021-11-02 23:21:45,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:21:45,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 23:21:45,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359861470] [2021-11-02 23:21:45,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:21:45,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:45,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:21:45,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:21:45,678 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:45,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:45,921 INFO L93 Difference]: Finished difference Result 251 states and 277 transitions. [2021-11-02 23:21:45,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:21:45,921 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-02 23:21:45,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:45,922 INFO L225 Difference]: With dead ends: 251 [2021-11-02 23:21:45,922 INFO L226 Difference]: Without dead ends: 238 [2021-11-02 23:21:45,923 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:21:45,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-02 23:21:45,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 165. [2021-11-02 23:21:45,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 161 states have (on average 1.15527950310559) internal successors, (186), 164 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:45,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 186 transitions. [2021-11-02 23:21:45,935 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 186 transitions. Word has length 41 [2021-11-02 23:21:45,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:45,935 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 186 transitions. [2021-11-02 23:21:45,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:45,936 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 186 transitions. [2021-11-02 23:21:45,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 23:21:45,936 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:45,936 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:45,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:46,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-02 23:21:46,150 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:21:46,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:46,150 INFO L85 PathProgramCache]: Analyzing trace with hash -486884641, now seen corresponding path program 1 times [2021-11-02 23:21:46,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:46,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608966742] [2021-11-02 23:21:46,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:46,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:46,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:46,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608966742] [2021-11-02 23:21:46,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608966742] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:46,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122623411] [2021-11-02 23:21:46,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:46,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:46,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:46,420 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:46,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 23:21:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:47,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 23:21:47,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:47,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:21:47,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:47,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:47,337 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-02 23:21:47,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 163 treesize of output 125 [2021-11-02 23:21:47,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:47,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:47,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:47,359 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-02 23:21:47,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 118 treesize of output 68 [2021-11-02 23:21:47,366 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-02 23:21:47,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 68 [2021-11-02 23:21:47,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:47,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:47,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:47,612 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 23:21:47,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 74 [2021-11-02 23:21:47,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:47,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:47,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:47,621 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 23:21:47,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 91 [2021-11-02 23:21:48,186 INFO L354 Elim1Store]: treesize reduction 94, result has 3.1 percent of original size [2021-11-02 23:21:48,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 122 treesize of output 70 [2021-11-02 23:21:48,197 INFO L354 Elim1Store]: treesize reduction 70, result has 4.1 percent of original size [2021-11-02 23:21:48,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 37 [2021-11-02 23:21:48,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:48,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122623411] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:48,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:48,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-11-02 23:21:48,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941819868] [2021-11-02 23:21:48,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:21:48,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:48,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:21:48,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:21:48,214 INFO L87 Difference]: Start difference. First operand 165 states and 186 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:49,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:49,162 INFO L93 Difference]: Finished difference Result 343 states and 385 transitions. [2021-11-02 23:21:49,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 23:21:49,163 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-02 23:21:49,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:49,164 INFO L225 Difference]: With dead ends: 343 [2021-11-02 23:21:49,164 INFO L226 Difference]: Without dead ends: 307 [2021-11-02 23:21:49,165 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:21:49,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-02 23:21:49,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 213. [2021-11-02 23:21:49,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 209 states have (on average 1.1531100478468899) internal successors, (241), 212 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:49,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 241 transitions. [2021-11-02 23:21:49,182 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 241 transitions. Word has length 41 [2021-11-02 23:21:49,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:49,182 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 241 transitions. [2021-11-02 23:21:49,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:49,183 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 241 transitions. [2021-11-02 23:21:49,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 23:21:49,183 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:49,183 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:49,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:49,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 23:21:49,398 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:21:49,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:49,398 INFO L85 PathProgramCache]: Analyzing trace with hash 860051195, now seen corresponding path program 1 times [2021-11-02 23:21:49,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:49,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668540212] [2021-11-02 23:21:49,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:49,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:49,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:49,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:49,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668540212] [2021-11-02 23:21:49,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668540212] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:49,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118011871] [2021-11-02 23:21:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:49,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:49,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:49,598 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:49,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 23:21:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:50,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:21:50,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:50,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:21:50,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:50,737 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-02 23:21:50,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 49 [2021-11-02 23:21:50,752 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 23:21:50,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 50 [2021-11-02 23:21:51,221 INFO L354 Elim1Store]: treesize reduction 624, result has 12.2 percent of original size [2021-11-02 23:21:51,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 353 treesize of output 204 [2021-11-02 23:21:51,241 INFO L354 Elim1Store]: treesize reduction 35, result has 34.0 percent of original size [2021-11-02 23:21:51,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 417 treesize of output 415 [2021-11-02 23:21:51,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:51,451 INFO L354 Elim1Store]: treesize reduction 51, result has 16.4 percent of original size [2021-11-02 23:21:51,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 171 treesize of output 98 [2021-11-02 23:21:52,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~end~0.offset] [2021-11-02 23:21:52,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:21:52,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 23:21:52,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580538654] [2021-11-02 23:21:52,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:21:52,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:52,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:21:52,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=154, Unknown=1, NotChecked=0, Total=210 [2021-11-02 23:21:52,621 INFO L87 Difference]: Start difference. First operand 213 states and 241 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:52,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:52,920 INFO L93 Difference]: Finished difference Result 313 states and 351 transitions. [2021-11-02 23:21:52,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:21:52,921 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-02 23:21:52,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:52,922 INFO L225 Difference]: With dead ends: 313 [2021-11-02 23:21:52,923 INFO L226 Difference]: Without dead ends: 288 [2021-11-02 23:21:52,923 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=227, Unknown=1, NotChecked=0, Total=306 [2021-11-02 23:21:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-02 23:21:52,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 247. [2021-11-02 23:21:52,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 243 states have (on average 1.1522633744855968) internal successors, (280), 246 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:52,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 280 transitions. [2021-11-02 23:21:52,943 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 280 transitions. Word has length 41 [2021-11-02 23:21:52,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:52,943 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 280 transitions. [2021-11-02 23:21:52,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:52,944 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 280 transitions. [2021-11-02 23:21:52,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 23:21:52,944 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:52,945 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:52,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-02 23:21:53,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:53,162 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:21:53,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:53,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1579942495, now seen corresponding path program 1 times [2021-11-02 23:21:53,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:53,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407674710] [2021-11-02 23:21:53,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:53,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:53,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:53,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407674710] [2021-11-02 23:21:53,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407674710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:53,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814594296] [2021-11-02 23:21:53,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:53,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:53,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:53,490 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:53,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 23:21:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:54,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:21:54,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:54,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:21:54,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:54,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:54,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:54,452 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-02 23:21:54,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-11-02 23:21:54,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:54,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:54,473 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-02 23:21:54,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 65 [2021-11-02 23:21:54,485 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-02 23:21:54,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 82 [2021-11-02 23:21:54,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:54,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:54,832 INFO L354 Elim1Store]: treesize reduction 164, result has 18.0 percent of original size [2021-11-02 23:21:54,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 271 treesize of output 185 [2021-11-02 23:21:54,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:21:54,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:21:54,855 INFO L354 Elim1Store]: treesize reduction 132, result has 18.5 percent of original size [2021-11-02 23:21:54,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 167 [2021-11-02 23:21:54,867 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-11-02 23:21:54,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 158 treesize of output 168 [2021-11-02 23:21:56,481 INFO L354 Elim1Store]: treesize reduction 256, result has 2.7 percent of original size [2021-11-02 23:21:56,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 239 treesize of output 125 [2021-11-02 23:21:56,530 INFO L354 Elim1Store]: treesize reduction 206, result has 3.3 percent of original size [2021-11-02 23:21:56,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 59 [2021-11-02 23:21:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:56,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814594296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:56,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:56,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-11-02 23:21:56,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285813945] [2021-11-02 23:21:56,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:21:56,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:56,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:21:56,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:21:56,543 INFO L87 Difference]: Start difference. First operand 247 states and 280 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:12,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:22:12,151 INFO L93 Difference]: Finished difference Result 534 states and 599 transitions. [2021-11-02 23:22:12,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:22:12,152 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-02 23:22:12,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:22:12,156 INFO L225 Difference]: With dead ends: 534 [2021-11-02 23:22:12,156 INFO L226 Difference]: Without dead ends: 532 [2021-11-02 23:22:12,157 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:22:12,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-11-02 23:22:12,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 310. [2021-11-02 23:22:12,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 306 states have (on average 1.15359477124183) internal successors, (353), 309 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 353 transitions. [2021-11-02 23:22:12,188 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 353 transitions. Word has length 41 [2021-11-02 23:22:12,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:22:12,188 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 353 transitions. [2021-11-02 23:22:12,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:12,188 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 353 transitions. [2021-11-02 23:22:12,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 23:22:12,189 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:22:12,190 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:12,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 23:22:12,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:12,410 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:22:12,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:12,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1585299589, now seen corresponding path program 1 times [2021-11-02 23:22:12,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:12,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710298491] [2021-11-02 23:22:12,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:12,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:12,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:12,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710298491] [2021-11-02 23:22:12,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710298491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:12,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312545125] [2021-11-02 23:22:12,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:12,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:12,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:12,729 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:12,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 23:22:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:13,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 23:22:13,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:13,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:22:13,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-02 23:22:13,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-02 23:22:13,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:13,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312545125] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:13,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:22:13,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2021-11-02 23:22:13,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002512114] [2021-11-02 23:22:13,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:22:13,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:13,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:22:13,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:22:13,954 INFO L87 Difference]: Start difference. First operand 310 states and 353 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:14,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:22:14,700 INFO L93 Difference]: Finished difference Result 421 states and 475 transitions. [2021-11-02 23:22:14,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 23:22:14,700 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-02 23:22:14,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:22:14,702 INFO L225 Difference]: With dead ends: 421 [2021-11-02 23:22:14,702 INFO L226 Difference]: Without dead ends: 394 [2021-11-02 23:22:14,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=268, Invalid=662, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:22:14,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-02 23:22:14,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 247. [2021-11-02 23:22:14,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 243 states have (on average 1.1481481481481481) internal successors, (279), 246 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:14,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 279 transitions. [2021-11-02 23:22:14,727 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 279 transitions. Word has length 41 [2021-11-02 23:22:14,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:22:14,728 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 279 transitions. [2021-11-02 23:22:14,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:14,728 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 279 transitions. [2021-11-02 23:22:14,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 23:22:14,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:22:14,729 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:14,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 23:22:14,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-02 23:22:14,954 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:22:14,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:14,954 INFO L85 PathProgramCache]: Analyzing trace with hash -475616078, now seen corresponding path program 1 times [2021-11-02 23:22:14,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:14,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044614594] [2021-11-02 23:22:14,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:14,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:15,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:15,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044614594] [2021-11-02 23:22:15,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044614594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:15,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764385826] [2021-11-02 23:22:15,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:15,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:15,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:15,273 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:15,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 23:22:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:16,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:22:16,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:16,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:22:16,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:16,388 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-02 23:22:16,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-11-02 23:22:16,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:16,403 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-02 23:22:16,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 62 [2021-11-02 23:22:16,416 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 23:22:16,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-11-02 23:22:16,705 INFO L354 Elim1Store]: treesize reduction 164, result has 18.0 percent of original size [2021-11-02 23:22:16,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 271 treesize of output 185 [2021-11-02 23:22:16,727 INFO L354 Elim1Store]: treesize reduction 132, result has 18.5 percent of original size [2021-11-02 23:22:16,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 167 [2021-11-02 23:22:16,739 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-11-02 23:22:16,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 158 treesize of output 168 [2021-11-02 23:22:18,121 INFO L354 Elim1Store]: treesize reduction 212, result has 3.2 percent of original size [2021-11-02 23:22:18,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 229 treesize of output 115 [2021-11-02 23:22:18,167 INFO L354 Elim1Store]: treesize reduction 162, result has 4.1 percent of original size [2021-11-02 23:22:18,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 75 treesize of output 51 [2021-11-02 23:22:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:18,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764385826] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:18,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:22:18,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-11-02 23:22:18,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767129189] [2021-11-02 23:22:18,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:22:18,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:18,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:22:18,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:22:18,177 INFO L87 Difference]: Start difference. First operand 247 states and 279 transitions. Second operand has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:25,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:22:25,837 INFO L93 Difference]: Finished difference Result 458 states and 509 transitions. [2021-11-02 23:22:25,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:22:25,838 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-02 23:22:25,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:22:25,840 INFO L225 Difference]: With dead ends: 458 [2021-11-02 23:22:25,841 INFO L226 Difference]: Without dead ends: 456 [2021-11-02 23:22:25,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=238, Invalid=818, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:22:25,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-11-02 23:22:25,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 253. [2021-11-02 23:22:25,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 249 states have (on average 1.144578313253012) internal successors, (285), 252 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:25,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 285 transitions. [2021-11-02 23:22:25,869 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 285 transitions. Word has length 44 [2021-11-02 23:22:25,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:22:25,869 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 285 transitions. [2021-11-02 23:22:25,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:25,869 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 285 transitions. [2021-11-02 23:22:25,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 23:22:25,870 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:22:25,870 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:25,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 23:22:26,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-02 23:22:26,086 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:22:26,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:26,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1510903672, now seen corresponding path program 2 times [2021-11-02 23:22:26,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:26,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84463112] [2021-11-02 23:22:26,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:26,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:26,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:26,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:26,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84463112] [2021-11-02 23:22:26,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84463112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:26,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153480099] [2021-11-02 23:22:26,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:22:26,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:26,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:26,243 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:26,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 23:22:27,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:22:27,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:22:27,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 23:22:27,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:27,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:22:27,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:27,469 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-02 23:22:27,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 163 treesize of output 125 [2021-11-02 23:22:27,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:27,484 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-02 23:22:27,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 97 treesize of output 59 [2021-11-02 23:22:27,506 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 23:22:27,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 56 [2021-11-02 23:22:27,695 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 23:22:27,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 74 [2021-11-02 23:22:27,699 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 23:22:27,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 91 [2021-11-02 23:22:28,348 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-11-02 23:22:28,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 112 treesize of output 62 [2021-11-02 23:22:28,361 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-02 23:22:28,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 29 [2021-11-02 23:22:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:28,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153480099] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:28,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:22:28,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-11-02 23:22:28,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238929685] [2021-11-02 23:22:28,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:22:28,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:28,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:22:28,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:22:28,379 INFO L87 Difference]: Start difference. First operand 253 states and 285 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:31,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:22:31,142 INFO L93 Difference]: Finished difference Result 404 states and 450 transitions. [2021-11-02 23:22:31,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:22:31,143 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-02 23:22:31,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:22:31,145 INFO L225 Difference]: With dead ends: 404 [2021-11-02 23:22:31,145 INFO L226 Difference]: Without dead ends: 332 [2021-11-02 23:22:31,145 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:22:31,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-02 23:22:31,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 257. [2021-11-02 23:22:31,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 253 states have (on average 1.1264822134387351) internal successors, (285), 256 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:31,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 285 transitions. [2021-11-02 23:22:31,173 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 285 transitions. Word has length 46 [2021-11-02 23:22:31,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:22:31,173 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 285 transitions. [2021-11-02 23:22:31,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:31,173 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 285 transitions. [2021-11-02 23:22:31,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 23:22:31,174 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:22:31,174 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:31,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 23:22:31,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-02 23:22:31,392 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:22:31,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:31,392 INFO L85 PathProgramCache]: Analyzing trace with hash -553250079, now seen corresponding path program 1 times [2021-11-02 23:22:31,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:31,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888436654] [2021-11-02 23:22:31,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:31,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:22:31,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:31,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888436654] [2021-11-02 23:22:31,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888436654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:31,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992167046] [2021-11-02 23:22:31,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:31,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:31,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:31,670 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:31,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 23:22:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:32,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 23:22:32,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:33,848 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-02 23:22:33,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2021-11-02 23:22:33,857 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-11-02 23:22:33,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-11-02 23:22:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:22:33,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992167046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:33,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:22:33,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-11-02 23:22:33,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666249634] [2021-11-02 23:22:33,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:22:33,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:33,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:22:33,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=193, Unknown=1, NotChecked=0, Total=240 [2021-11-02 23:22:33,871 INFO L87 Difference]: Start difference. First operand 257 states and 285 transitions. Second operand has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:35,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:22:35,827 INFO L93 Difference]: Finished difference Result 530 states and 582 transitions. [2021-11-02 23:22:35,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-02 23:22:35,828 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-02 23:22:35,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:22:35,830 INFO L225 Difference]: With dead ends: 530 [2021-11-02 23:22:35,830 INFO L226 Difference]: Without dead ends: 514 [2021-11-02 23:22:35,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=482, Invalid=2273, Unknown=1, NotChecked=0, Total=2756 [2021-11-02 23:22:35,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-02 23:22:35,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 315. [2021-11-02 23:22:35,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 311 states have (on average 1.144694533762058) internal successors, (356), 314 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:35,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 356 transitions. [2021-11-02 23:22:35,866 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 356 transitions. Word has length 49 [2021-11-02 23:22:35,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:22:35,866 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 356 transitions. [2021-11-02 23:22:35,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:35,867 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 356 transitions. [2021-11-02 23:22:35,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 23:22:35,868 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:22:35,868 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:35,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 23:22:36,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:36,090 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:22:36,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:36,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1052798972, now seen corresponding path program 2 times [2021-11-02 23:22:36,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:36,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891927505] [2021-11-02 23:22:36,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:36,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:22:36,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:36,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891927505] [2021-11-02 23:22:36,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891927505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:36,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124658723] [2021-11-02 23:22:36,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:22:36,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:36,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:36,218 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:36,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 23:22:37,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:22:37,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:22:37,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 23:22:37,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:37,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 23:22:37,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 48 [2021-11-02 23:22:37,781 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 23:22:37,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-02 23:22:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:22:37,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124658723] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:37,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:22:37,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-11-02 23:22:37,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310728249] [2021-11-02 23:22:37,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:22:37,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:37,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:22:37,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:22:37,797 INFO L87 Difference]: Start difference. First operand 315 states and 356 transitions. Second operand has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:38,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:22:38,742 INFO L93 Difference]: Finished difference Result 509 states and 573 transitions. [2021-11-02 23:22:38,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:22:38,742 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-02 23:22:38,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:22:38,744 INFO L225 Difference]: With dead ends: 509 [2021-11-02 23:22:38,744 INFO L226 Difference]: Without dead ends: 466 [2021-11-02 23:22:38,745 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:22:38,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-02 23:22:38,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 362. [2021-11-02 23:22:38,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 358 states have (on average 1.1480446927374302) internal successors, (411), 361 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:38,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 411 transitions. [2021-11-02 23:22:38,774 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 411 transitions. Word has length 52 [2021-11-02 23:22:38,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:22:38,774 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 411 transitions. [2021-11-02 23:22:38,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:38,774 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 411 transitions. [2021-11-02 23:22:38,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 23:22:38,775 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:22:38,775 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:38,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 23:22:38,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-02 23:22:38,998 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:22:38,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:38,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1834750872, now seen corresponding path program 3 times [2021-11-02 23:22:38,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:38,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638136186] [2021-11-02 23:22:38,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:38,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:39,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:39,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638136186] [2021-11-02 23:22:39,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638136186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:39,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717324496] [2021-11-02 23:22:39,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:22:39,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:39,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:39,349 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:39,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 23:22:40,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 23:22:40,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:22:40,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 23:22:40,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:40,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:22:40,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:40,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:40,921 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-02 23:22:40,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-11-02 23:22:40,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:40,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:22:40,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:40,938 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-02 23:22:40,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 62 [2021-11-02 23:22:40,949 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 23:22:40,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-11-02 23:22:41,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:41,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:41,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2021-11-02 23:22:41,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:41,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:41,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2021-11-02 23:22:41,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:22:41,595 INFO L354 Elim1Store]: treesize reduction 168, result has 19.2 percent of original size [2021-11-02 23:22:41,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 168 [2021-11-02 23:22:41,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:22:41,663 INFO L354 Elim1Store]: treesize reduction 228, result has 17.4 percent of original size [2021-11-02 23:22:41,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 169 treesize of output 149 [2021-11-02 23:22:41,675 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-11-02 23:22:41,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 137 treesize of output 139 [2021-11-02 23:22:42,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:42,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:22:42,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:42,137 INFO L354 Elim1Store]: treesize reduction 218, result has 18.4 percent of original size [2021-11-02 23:22:42,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 217 treesize of output 143 [2021-11-02 23:22:42,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:42,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:22:42,194 INFO L354 Elim1Store]: treesize reduction 400, result has 15.1 percent of original size [2021-11-02 23:22:42,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 214 treesize of output 220 [2021-11-02 23:22:42,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~end~0.offset] [2021-11-02 23:22:42,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:22:42,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 23:22:42,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641501684] [2021-11-02 23:22:42,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:22:42,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:42,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:22:42,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:22:42,839 INFO L87 Difference]: Start difference. First operand 362 states and 411 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:43,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:22:43,808 INFO L93 Difference]: Finished difference Result 654 states and 744 transitions. [2021-11-02 23:22:43,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 23:22:43,808 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-02 23:22:43,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:22:43,811 INFO L225 Difference]: With dead ends: 654 [2021-11-02 23:22:43,811 INFO L226 Difference]: Without dead ends: 547 [2021-11-02 23:22:43,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:22:43,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-11-02 23:22:43,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 417. [2021-11-02 23:22:43,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 413 states have (on average 1.145278450363196) internal successors, (473), 416 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:43,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 473 transitions. [2021-11-02 23:22:43,848 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 473 transitions. Word has length 53 [2021-11-02 23:22:43,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:22:43,848 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 473 transitions. [2021-11-02 23:22:43,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:43,848 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 473 transitions. [2021-11-02 23:22:43,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 23:22:43,849 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:22:43,849 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:43,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-02 23:22:44,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-02 23:22:44,078 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:22:44,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:44,078 INFO L85 PathProgramCache]: Analyzing trace with hash -393389288, now seen corresponding path program 1 times [2021-11-02 23:22:44,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:44,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027986563] [2021-11-02 23:22:44,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:44,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:44,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:44,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027986563] [2021-11-02 23:22:44,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027986563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:44,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463714435] [2021-11-02 23:22:44,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:44,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:44,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:44,395 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:44,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 23:22:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:45,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-02 23:22:45,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:45,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:22:45,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:45,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:45,881 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-02 23:22:45,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-11-02 23:22:45,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:45,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:22:45,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:45,898 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-02 23:22:45,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 62 [2021-11-02 23:22:45,911 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 23:22:45,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-11-02 23:22:46,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:46,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:46,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2021-11-02 23:22:46,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:46,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:46,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2021-11-02 23:22:46,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:22:46,597 INFO L354 Elim1Store]: treesize reduction 168, result has 19.2 percent of original size [2021-11-02 23:22:46,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 300 treesize of output 174 [2021-11-02 23:22:46,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:22:46,650 INFO L354 Elim1Store]: treesize reduction 276, result has 16.9 percent of original size [2021-11-02 23:22:46,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 276 treesize of output 187 [2021-11-02 23:22:46,673 INFO L354 Elim1Store]: treesize reduction 92, result has 31.9 percent of original size [2021-11-02 23:22:46,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 175 treesize of output 198 [2021-11-02 23:22:47,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:22:47,835 INFO L354 Elim1Store]: treesize reduction 1064, result has 11.6 percent of original size [2021-11-02 23:22:47,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 31 case distinctions, treesize of input 965 treesize of output 507 [2021-11-02 23:22:47,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:22:48,079 INFO L354 Elim1Store]: treesize reduction 1814, result has 8.8 percent of original size [2021-11-02 23:22:48,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 868 treesize of output 785 [2021-11-02 23:22:48,133 INFO L354 Elim1Store]: treesize reduction 60, result has 52.8 percent of original size [2021-11-02 23:22:48,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 787 treesize of output 819 [2021-11-02 23:22:48,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:48,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:48,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:48,218 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-02 23:22:48,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 147 treesize of output 51 [2021-11-02 23:22:48,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:22:48,775 INFO L354 Elim1Store]: treesize reduction 242, result has 8.7 percent of original size [2021-11-02 23:22:48,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 33 case distinctions, treesize of input 481 treesize of output 263 [2021-11-02 23:22:50,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~end~0.offset] [2021-11-02 23:22:50,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:22:50,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 23:22:50,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788691980] [2021-11-02 23:22:50,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:22:50,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:50,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:22:50,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:22:50,293 INFO L87 Difference]: Start difference. First operand 417 states and 473 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:50,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:22:50,974 INFO L93 Difference]: Finished difference Result 709 states and 806 transitions. [2021-11-02 23:22:50,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 23:22:50,975 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-02 23:22:50,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:22:50,977 INFO L225 Difference]: With dead ends: 709 [2021-11-02 23:22:50,978 INFO L226 Difference]: Without dead ends: 602 [2021-11-02 23:22:50,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:22:50,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-11-02 23:22:51,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 421. [2021-11-02 23:22:51,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 417 states have (on average 1.143884892086331) internal successors, (477), 420 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:51,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 477 transitions. [2021-11-02 23:22:51,023 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 477 transitions. Word has length 53 [2021-11-02 23:22:51,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:22:51,024 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 477 transitions. [2021-11-02 23:22:51,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:51,024 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 477 transitions. [2021-11-02 23:22:51,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 23:22:51,025 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:22:51,025 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:51,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 23:22:51,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:51,238 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:22:51,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:51,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1063131928, now seen corresponding path program 2 times [2021-11-02 23:22:51,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:51,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861244855] [2021-11-02 23:22:51,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:51,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:51,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:51,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:51,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861244855] [2021-11-02 23:22:51,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861244855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:51,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414745568] [2021-11-02 23:22:51,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:22:51,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:51,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:51,902 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:51,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 23:22:53,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:22:53,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:22:53,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:22:53,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:53,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:22:53,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:53,521 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-02 23:22:53,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-11-02 23:22:53,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:53,536 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-02 23:22:53,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 62 [2021-11-02 23:22:53,547 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 23:22:53,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-11-02 23:22:53,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:53,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:53,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:53,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:22:53,821 INFO L354 Elim1Store]: treesize reduction 118, result has 16.9 percent of original size [2021-11-02 23:22:53,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 334 treesize of output 265 [2021-11-02 23:22:53,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:53,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:53,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:22:53,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:22:53,844 INFO L354 Elim1Store]: treesize reduction 50, result has 32.4 percent of original size [2021-11-02 23:22:53,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 119 [2021-11-02 23:22:53,869 INFO L354 Elim1Store]: treesize reduction 60, result has 34.1 percent of original size [2021-11-02 23:22:53,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 137 treesize of output 154 [2021-11-02 23:22:54,458 INFO L354 Elim1Store]: treesize reduction 266, result has 15.8 percent of original size [2021-11-02 23:22:54,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 435 treesize of output 242 [2021-11-02 23:22:54,542 INFO L354 Elim1Store]: treesize reduction 442, result has 15.0 percent of original size [2021-11-02 23:22:54,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 23 case distinctions, treesize of input 258 treesize of output 244 [2021-11-02 23:22:54,558 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-02 23:22:54,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 226 treesize of output 222 [2021-11-02 23:22:55,105 INFO L354 Elim1Store]: treesize reduction 96, result has 13.5 percent of original size [2021-11-02 23:22:55,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 30 case distinctions, treesize of input 205 treesize of output 167 [2021-11-02 23:22:55,131 INFO L354 Elim1Store]: treesize reduction 220, result has 10.9 percent of original size [2021-11-02 23:22:55,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 30 case distinctions, treesize of input 221 treesize of output 237 [2021-11-02 23:22:56,934 INFO L354 Elim1Store]: treesize reduction 354, result has 7.1 percent of original size [2021-11-02 23:22:56,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 3 disjoint index pairs (out of 55 index pairs), introduced 19 new quantified variables, introduced 55 case distinctions, treesize of input 448 treesize of output 200 [2021-11-02 23:22:57,009 INFO L354 Elim1Store]: treesize reduction 354, result has 1.9 percent of original size [2021-11-02 23:22:57,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 3 disjoint index pairs (out of 55 index pairs), introduced 14 new quantified variables, introduced 55 case distinctions, treesize of input 122 treesize of output 81 [2021-11-02 23:22:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:57,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414745568] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:57,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:22:57,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-11-02 23:22:57,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794549405] [2021-11-02 23:22:57,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:22:57,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:57,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:22:57,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:22:57,022 INFO L87 Difference]: Start difference. First operand 421 states and 477 transitions. Second operand has 21 states, 21 states have (on average 4.380952380952381) internal successors, (92), 21 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:45,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:23:45,811 INFO L93 Difference]: Finished difference Result 1028 states and 1162 transitions. [2021-11-02 23:23:45,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-02 23:23:45,811 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.380952380952381) internal successors, (92), 21 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-02 23:23:45,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:23:45,815 INFO L225 Difference]: With dead ends: 1028 [2021-11-02 23:23:45,815 INFO L226 Difference]: Without dead ends: 1026 [2021-11-02 23:23:45,816 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=545, Invalid=2639, Unknown=8, NotChecked=0, Total=3192 [2021-11-02 23:23:45,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-11-02 23:23:45,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 538. [2021-11-02 23:23:45,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 534 states have (on average 1.146067415730337) internal successors, (612), 537 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:45,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 612 transitions. [2021-11-02 23:23:45,882 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 612 transitions. Word has length 53 [2021-11-02 23:23:45,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:23:45,882 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 612 transitions. [2021-11-02 23:23:45,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.380952380952381) internal successors, (92), 21 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:45,882 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 612 transitions. [2021-11-02 23:23:45,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 23:23:45,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:23:45,884 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:23:45,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 23:23:46,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-02 23:23:46,090 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:23:46,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:23:46,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1165008232, now seen corresponding path program 2 times [2021-11-02 23:23:46,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:23:46,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546105148] [2021-11-02 23:23:46,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:23:46,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:23:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:23:46,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:23:46,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546105148] [2021-11-02 23:23:46,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546105148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:46,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731025002] [2021-11-02 23:23:46,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:23:46,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:23:46,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:23:46,719 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:23:46,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 23:23:48,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:23:48,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:23:48,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:23:48,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:23:48,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:23:48,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:48,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:48,551 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-02 23:23:48,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-11-02 23:23:48,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:48,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:23:48,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:48,568 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-02 23:23:48,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 62 [2021-11-02 23:23:48,580 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 23:23:48,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-11-02 23:23:48,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:48,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:48,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:48,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:23:48,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:23:48,893 INFO L354 Elim1Store]: treesize reduction 118, result has 16.9 percent of original size [2021-11-02 23:23:48,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 334 treesize of output 265 [2021-11-02 23:23:48,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:48,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:48,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:48,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:23:48,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:23:48,916 INFO L354 Elim1Store]: treesize reduction 50, result has 32.4 percent of original size [2021-11-02 23:23:48,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 119 [2021-11-02 23:23:48,942 INFO L354 Elim1Store]: treesize reduction 60, result has 34.1 percent of original size [2021-11-02 23:23:48,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 137 treesize of output 154 [2021-11-02 23:23:49,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:23:49,567 INFO L354 Elim1Store]: treesize reduction 262, result has 17.1 percent of original size [2021-11-02 23:23:49,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 390 treesize of output 221 [2021-11-02 23:23:49,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:23:49,646 INFO L354 Elim1Store]: treesize reduction 442, result has 15.0 percent of original size [2021-11-02 23:23:49,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 23 case distinctions, treesize of input 265 treesize of output 251 [2021-11-02 23:23:49,683 INFO L354 Elim1Store]: treesize reduction 138, result has 27.4 percent of original size [2021-11-02 23:23:49,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 233 treesize of output 263 [2021-11-02 23:23:50,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:23:51,360 INFO L354 Elim1Store]: treesize reduction 1390, result has 11.0 percent of original size [2021-11-02 23:23:51,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 48 case distinctions, treesize of input 1059 treesize of output 572 [2021-11-02 23:23:51,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:23:51,806 INFO L354 Elim1Store]: treesize reduction 2524, result has 8.5 percent of original size [2021-11-02 23:23:51,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 46 case distinctions, treesize of input 1000 treesize of output 953 [2021-11-02 23:23:51,878 INFO L354 Elim1Store]: treesize reduction 146, result has 32.7 percent of original size [2021-11-02 23:23:51,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 973 treesize of output 999 [2021-11-02 23:23:51,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:51,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:51,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:51,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:51,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:51,991 INFO L354 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2021-11-02 23:23:51,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 12 case distinctions, treesize of input 190 treesize of output 78 [2021-11-02 23:23:52,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:23:52,871 INFO L354 Elim1Store]: treesize reduction 278, result has 12.3 percent of original size [2021-11-02 23:23:52,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 3 disjoint index pairs (out of 55 index pairs), introduced 15 new quantified variables, introduced 55 case distinctions, treesize of input 646 treesize of output 362 [2021-11-02 23:23:54,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~end~0.offset] [2021-11-02 23:23:54,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:23:54,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-02 23:23:54,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048344323] [2021-11-02 23:23:54,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:23:54,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:23:54,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:23:54,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:23:54,675 INFO L87 Difference]: Start difference. First operand 538 states and 612 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:56,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:23:56,438 INFO L93 Difference]: Finished difference Result 852 states and 971 transitions. [2021-11-02 23:23:56,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 23:23:56,438 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-02 23:23:56,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:23:56,441 INFO L225 Difference]: With dead ends: 852 [2021-11-02 23:23:56,441 INFO L226 Difference]: Without dead ends: 850 [2021-11-02 23:23:56,442 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=236, Invalid=1024, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:23:56,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-11-02 23:23:56,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 597. [2021-11-02 23:23:56,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 593 states have (on average 1.1467116357504217) internal successors, (680), 596 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:56,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 680 transitions. [2021-11-02 23:23:56,492 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 680 transitions. Word has length 53 [2021-11-02 23:23:56,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:23:56,492 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 680 transitions. [2021-11-02 23:23:56,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:56,492 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 680 transitions. [2021-11-02 23:23:56,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 23:23:56,505 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:23:56,505 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:23:56,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 23:23:56,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-02 23:23:56,706 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:23:56,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:23:56,707 INFO L85 PathProgramCache]: Analyzing trace with hash 678538585, now seen corresponding path program 1 times [2021-11-02 23:23:56,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:23:56,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507933177] [2021-11-02 23:23:56,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:23:56,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:23:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:57,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:23:57,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:23:57,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507933177] [2021-11-02 23:23:57,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507933177] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:57,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70823445] [2021-11-02 23:23:57,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:23:57,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:23:57,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:23:57,349 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:23:57,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 23:23:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:59,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:23:59,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:23:59,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:23:59,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:59,376 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-02 23:23:59,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-11-02 23:23:59,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:59,392 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-02 23:23:59,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 78 [2021-11-02 23:23:59,404 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-02 23:23:59,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 82 [2021-11-02 23:23:59,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:59,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:59,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:59,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:23:59,694 INFO L354 Elim1Store]: treesize reduction 126, result has 16.0 percent of original size [2021-11-02 23:23:59,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 354 treesize of output 285 [2021-11-02 23:23:59,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:59,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:59,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:59,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:23:59,719 INFO L354 Elim1Store]: treesize reduction 58, result has 29.3 percent of original size [2021-11-02 23:23:59,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 141 treesize of output 126 [2021-11-02 23:23:59,762 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-02 23:23:59,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 141 treesize of output 158 [2021-11-02 23:24:00,372 INFO L354 Elim1Store]: treesize reduction 266, result has 15.8 percent of original size [2021-11-02 23:24:00,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 435 treesize of output 242 [2021-11-02 23:24:00,443 INFO L354 Elim1Store]: treesize reduction 442, result has 15.0 percent of original size [2021-11-02 23:24:00,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 23 case distinctions, treesize of input 258 treesize of output 244 [2021-11-02 23:24:00,458 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-02 23:24:00,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 226 treesize of output 222 [2021-11-02 23:24:01,071 INFO L354 Elim1Store]: treesize reduction 96, result has 13.5 percent of original size [2021-11-02 23:24:01,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 30 case distinctions, treesize of input 205 treesize of output 167 [2021-11-02 23:24:01,100 INFO L354 Elim1Store]: treesize reduction 248, result has 9.8 percent of original size [2021-11-02 23:24:01,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 30 case distinctions, treesize of input 262 treesize of output 274 [2021-11-02 23:24:03,012 INFO L354 Elim1Store]: treesize reduction 330, result has 7.6 percent of original size [2021-11-02 23:24:03,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 3 disjoint index pairs (out of 55 index pairs), introduced 16 new quantified variables, introduced 55 case distinctions, treesize of input 304 treesize of output 161 [2021-11-02 23:24:03,067 INFO L354 Elim1Store]: treesize reduction 282, result has 2.4 percent of original size [2021-11-02 23:24:03,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 3 disjoint index pairs (out of 55 index pairs), introduced 13 new quantified variables, introduced 55 case distinctions, treesize of input 112 treesize of output 76 [2021-11-02 23:24:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:24:03,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70823445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:24:03,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:24:03,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-11-02 23:24:03,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157686771] [2021-11-02 23:24:03,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:24:03,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:24:03,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:24:03,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:24:03,105 INFO L87 Difference]: Start difference. First operand 597 states and 680 transitions. Second operand has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 21 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:24,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:24:24,604 INFO L93 Difference]: Finished difference Result 1049 states and 1183 transitions. [2021-11-02 23:24:24,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-02 23:24:24,604 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 21 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-02 23:24:24,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:24:24,609 INFO L225 Difference]: With dead ends: 1049 [2021-11-02 23:24:24,609 INFO L226 Difference]: Without dead ends: 1047 [2021-11-02 23:24:24,610 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=391, Invalid=1960, Unknown=1, NotChecked=0, Total=2352 [2021-11-02 23:24:24,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-11-02 23:24:24,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 613. [2021-11-02 23:24:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 609 states have (on average 1.1395730706075533) internal successors, (694), 612 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 694 transitions. [2021-11-02 23:24:24,685 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 694 transitions. Word has length 56 [2021-11-02 23:24:24,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:24:24,685 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 694 transitions. [2021-11-02 23:24:24,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 21 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:24,686 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 694 transitions. [2021-11-02 23:24:24,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 23:24:24,687 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:24:24,687 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:24:24,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 23:24:24,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-02 23:24:24,890 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:24:24,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:24:24,890 INFO L85 PathProgramCache]: Analyzing trace with hash 874591705, now seen corresponding path program 2 times [2021-11-02 23:24:24,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:24:24,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927811784] [2021-11-02 23:24:24,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:24:24,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:24:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:24:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:24:25,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:24:25,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927811784] [2021-11-02 23:24:25,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927811784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:24:25,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622348350] [2021-11-02 23:24:25,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:24:25,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:24:25,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:24:25,547 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:24:25,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 23:24:27,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:24:27,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:24:27,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-02 23:24:27,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:24:27,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:24:27,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:27,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:24:27,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:27,807 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-02 23:24:27,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-11-02 23:24:27,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:27,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:27,824 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-02 23:24:27,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 65 [2021-11-02 23:24:27,836 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-02 23:24:27,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 82 [2021-11-02 23:24:28,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:28,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:28,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:28,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:24:28,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:28,227 INFO L354 Elim1Store]: treesize reduction 602, result has 5.9 percent of original size [2021-11-02 23:24:28,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 224 treesize of output 209 [2021-11-02 23:24:28,269 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-02 23:24:28,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 248 treesize of output 265 [2021-11-02 23:24:28,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:28,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:28,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:28,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:28,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:24:28,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:24:28,294 INFO L354 Elim1Store]: treesize reduction 94, result has 20.3 percent of original size [2021-11-02 23:24:28,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 160 treesize of output 158 [2021-11-02 23:24:28,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:24:28,947 INFO L354 Elim1Store]: treesize reduction 266, result has 15.8 percent of original size [2021-11-02 23:24:28,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 441 treesize of output 248 [2021-11-02 23:24:28,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:24:29,028 INFO L354 Elim1Store]: treesize reduction 490, result has 14.9 percent of original size [2021-11-02 23:24:29,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 23 case distinctions, treesize of input 365 treesize of output 282 [2021-11-02 23:24:29,063 INFO L354 Elim1Store]: treesize reduction 202, result has 22.9 percent of original size [2021-11-02 23:24:29,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 264 treesize of output 294 [2021-11-02 23:24:29,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:29,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:24:29,917 INFO L354 Elim1Store]: treesize reduction 428, result has 14.2 percent of original size [2021-11-02 23:24:29,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 38 case distinctions, treesize of input 529 treesize of output 288 [2021-11-02 23:24:29,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:29,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:24:30,028 INFO L354 Elim1Store]: treesize reduction 560, result has 13.8 percent of original size [2021-11-02 23:24:30,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 356 treesize of output 347 [2021-11-02 23:24:30,052 INFO L354 Elim1Store]: treesize reduction 136, result has 23.2 percent of original size [2021-11-02 23:24:30,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 323 treesize of output 329 [2021-11-02 23:24:33,010 INFO L354 Elim1Store]: treesize reduction 466, result has 7.0 percent of original size [2021-11-02 23:24:33,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 3 disjoint index pairs (out of 78 index pairs), introduced 22 new quantified variables, introduced 78 case distinctions, treesize of input 536 treesize of output 239 [2021-11-02 23:24:33,131 INFO L354 Elim1Store]: treesize reduction 474, result has 1.5 percent of original size [2021-11-02 23:24:33,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 3 disjoint index pairs (out of 78 index pairs), introduced 16 new quantified variables, introduced 78 case distinctions, treesize of input 157 treesize of output 104 [2021-11-02 23:24:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:24:33,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622348350] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:24:33,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:24:33,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-11-02 23:24:33,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305245233] [2021-11-02 23:24:33,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:24:33,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:24:33,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:24:33,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:24:33,144 INFO L87 Difference]: Start difference. First operand 613 states and 694 transitions. Second operand has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 21 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:39,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:24:39,731 INFO L93 Difference]: Finished difference Result 1194 states and 1362 transitions. [2021-11-02 23:24:39,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-02 23:24:39,732 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 21 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-02 23:24:39,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:24:39,736 INFO L225 Difference]: With dead ends: 1194 [2021-11-02 23:24:39,736 INFO L226 Difference]: Without dead ends: 1192 [2021-11-02 23:24:39,737 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=603, Invalid=2589, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 23:24:39,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2021-11-02 23:24:39,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 809. [2021-11-02 23:24:39,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 805 states have (on average 1.146583850931677) internal successors, (923), 808 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:39,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 923 transitions. [2021-11-02 23:24:39,841 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 923 transitions. Word has length 56 [2021-11-02 23:24:39,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:24:39,841 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 923 transitions. [2021-11-02 23:24:39,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 21 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:39,842 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 923 transitions. [2021-11-02 23:24:39,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-02 23:24:39,842 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:24:39,843 INFO L513 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:24:39,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-02 23:24:40,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-02 23:24:40,043 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:24:40,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:24:40,044 INFO L85 PathProgramCache]: Analyzing trace with hash 460975040, now seen corresponding path program 1 times [2021-11-02 23:24:40,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:24:40,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339730161] [2021-11-02 23:24:40,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:24:40,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:24:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:24:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 23:24:40,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:24:40,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339730161] [2021-11-02 23:24:40,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339730161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:24:40,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523813293] [2021-11-02 23:24:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:24:40,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:24:40,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:24:40,338 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:24:40,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 23:24:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:24:42,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 23:24:42,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:24:42,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:24:42,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:42,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:43,020 INFO L354 Elim1Store]: treesize reduction 190, result has 8.2 percent of original size [2021-11-02 23:24:43,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 157 treesize of output 146 [2021-11-02 23:24:43,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:43,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:43,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:24:43,032 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-02 23:24:43,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 90 [2021-11-02 23:24:43,044 INFO L354 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2021-11-02 23:24:43,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 94 [2021-11-02 23:24:43,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:24:43,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:43,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:43,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:43,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:43,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:24:43,398 INFO L354 Elim1Store]: treesize reduction 222, result has 18.4 percent of original size [2021-11-02 23:24:43,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 242 treesize of output 213 [2021-11-02 23:24:43,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:43,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:43,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:24:43,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:43,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:43,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:43,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:24:43,451 INFO L354 Elim1Store]: treesize reduction 152, result has 21.6 percent of original size [2021-11-02 23:24:43,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 176 treesize of output 124 [2021-11-02 23:24:43,464 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-11-02 23:24:43,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 139 treesize of output 141 [2021-11-02 23:24:43,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:43,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:24:43,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:24:43,928 INFO L354 Elim1Store]: treesize reduction 226, result has 18.4 percent of original size [2021-11-02 23:24:43,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 181 treesize of output 147 [2021-11-02 23:24:43,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:43,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:43,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:24:43,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:43,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:43,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:24:44,025 INFO L354 Elim1Store]: treesize reduction 348, result has 15.7 percent of original size [2021-11-02 23:24:44,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 182 treesize of output 192 [2021-11-02 23:24:44,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~end~0.offset] [2021-11-02 23:24:44,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:24:44,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 23:24:44,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006996187] [2021-11-02 23:24:44,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:24:44,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:24:44,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:24:44,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:24:44,696 INFO L87 Difference]: Start difference. First operand 809 states and 923 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:45,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:24:45,305 INFO L93 Difference]: Finished difference Result 885 states and 1006 transitions. [2021-11-02 23:24:45,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:24:45,306 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-02 23:24:45,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:24:45,309 INFO L225 Difference]: With dead ends: 885 [2021-11-02 23:24:45,309 INFO L226 Difference]: Without dead ends: 883 [2021-11-02 23:24:45,310 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:24:45,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-11-02 23:24:45,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 819. [2021-11-02 23:24:45,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 815 states have (on average 1.1447852760736197) internal successors, (933), 818 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:45,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 933 transitions. [2021-11-02 23:24:45,422 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 933 transitions. Word has length 57 [2021-11-02 23:24:45,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:24:45,423 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 933 transitions. [2021-11-02 23:24:45,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:45,423 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 933 transitions. [2021-11-02 23:24:45,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-02 23:24:45,425 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:24:45,425 INFO L513 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:24:45,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 23:24:45,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:24:45,626 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:24:45,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:24:45,626 INFO L85 PathProgramCache]: Analyzing trace with hash -2043923648, now seen corresponding path program 1 times [2021-11-02 23:24:45,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:24:45,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62346959] [2021-11-02 23:24:45,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:24:45,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:24:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:24:47,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:24:47,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:24:47,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62346959] [2021-11-02 23:24:47,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62346959] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:24:47,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257680352] [2021-11-02 23:24:47,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:24:47,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:24:47,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:24:47,430 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:24:47,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 23:24:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:24:49,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-02 23:24:49,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:24:49,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:24:49,976 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 23:24:49,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 23:24:50,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:50,155 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-02 23:24:50,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 178 treesize of output 140 [2021-11-02 23:24:50,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:50,174 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-02 23:24:50,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 74 [2021-11-02 23:24:50,197 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-02 23:24:50,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 71 treesize of output 82 [2021-11-02 23:24:50,600 INFO L354 Elim1Store]: treesize reduction 164, result has 18.0 percent of original size [2021-11-02 23:24:50,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 292 treesize of output 202 [2021-11-02 23:24:50,634 INFO L354 Elim1Store]: treesize reduction 132, result has 18.5 percent of original size [2021-11-02 23:24:50,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 208 treesize of output 196 [2021-11-02 23:24:50,649 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-11-02 23:24:50,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 191 [2021-11-02 23:24:51,974 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-02 23:24:51,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 169 treesize of output 113 [2021-11-02 23:24:52,066 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-02 23:24:52,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 96 treesize of output 38 [2021-11-02 23:24:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:24:52,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257680352] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:24:52,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:24:52,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 26 [2021-11-02 23:24:52,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479632034] [2021-11-02 23:24:52,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 23:24:52,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:24:52,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 23:24:52,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:24:52,115 INFO L87 Difference]: Start difference. First operand 819 states and 933 transitions. Second operand has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:12,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:25:12,747 INFO L93 Difference]: Finished difference Result 998 states and 1122 transitions. [2021-11-02 23:25:12,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 23:25:12,747 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-02 23:25:12,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:25:12,750 INFO L225 Difference]: With dead ends: 998 [2021-11-02 23:25:12,750 INFO L226 Difference]: Without dead ends: 981 [2021-11-02 23:25:12,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=829, Invalid=3199, Unknown=4, NotChecked=0, Total=4032 [2021-11-02 23:25:12,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-11-02 23:25:12,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 849. [2021-11-02 23:25:12,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 845 states have (on average 1.139644970414201) internal successors, (963), 848 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:12,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 963 transitions. [2021-11-02 23:25:12,849 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 963 transitions. Word has length 57 [2021-11-02 23:25:12,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:25:12,849 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 963 transitions. [2021-11-02 23:25:12,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:12,849 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 963 transitions. [2021-11-02 23:25:12,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 23:25:12,850 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:25:12,855 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:25:12,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-02 23:25:13,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:25:13,058 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:25:13,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:25:13,058 INFO L85 PathProgramCache]: Analyzing trace with hash -698899601, now seen corresponding path program 4 times [2021-11-02 23:25:13,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:25:13,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866780891] [2021-11-02 23:25:13,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:25:13,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:25:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:25:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:25:13,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:25:13,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866780891] [2021-11-02 23:25:13,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866780891] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:13,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979215363] [2021-11-02 23:25:13,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:25:13,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:25:13,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:25:13,472 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:25:13,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 23:25:16,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:25:16,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:25:16,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 23:25:16,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:25:16,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:25:16,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:16,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:25:16,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:16,252 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-02 23:25:16,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-11-02 23:25:16,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:16,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:16,268 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-02 23:25:16,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 65 [2021-11-02 23:25:16,280 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 23:25:16,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-11-02 23:25:16,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:16,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:16,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2021-11-02 23:25:16,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:16,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:16,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2021-11-02 23:25:16,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:25:16,993 INFO L354 Elim1Store]: treesize reduction 172, result has 17.3 percent of original size [2021-11-02 23:25:16,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 345 treesize of output 195 [2021-11-02 23:25:16,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:25:17,044 INFO L354 Elim1Store]: treesize reduction 276, result has 16.9 percent of original size [2021-11-02 23:25:17,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 261 treesize of output 172 [2021-11-02 23:25:17,053 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-11-02 23:25:17,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 154 [2021-11-02 23:25:17,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:17,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:17,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:25:17,450 INFO L354 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2021-11-02 23:25:17,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 193 treesize of output 125 [2021-11-02 23:25:17,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:17,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:25:17,469 INFO L354 Elim1Store]: treesize reduction 73, result has 13.1 percent of original size [2021-11-02 23:25:17,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 128 treesize of output 142 [2021-11-02 23:25:18,939 INFO L354 Elim1Store]: treesize reduction 262, result has 5.4 percent of original size [2021-11-02 23:25:18,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 358 treesize of output 165 [2021-11-02 23:25:18,989 INFO L354 Elim1Store]: treesize reduction 246, result has 2.8 percent of original size [2021-11-02 23:25:18,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 97 treesize of output 60 [2021-11-02 23:25:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:25:19,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979215363] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:19,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:25:19,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-11-02 23:25:19,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554749157] [2021-11-02 23:25:19,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:25:19,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:25:19,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:25:19,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:25:19,008 INFO L87 Difference]: Start difference. First operand 849 states and 963 transitions. Second operand has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:21,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:25:21,064 INFO L93 Difference]: Finished difference Result 1329 states and 1513 transitions. [2021-11-02 23:25:21,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 23:25:21,065 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-02 23:25:21,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:25:21,069 INFO L225 Difference]: With dead ends: 1329 [2021-11-02 23:25:21,069 INFO L226 Difference]: Without dead ends: 1187 [2021-11-02 23:25:21,070 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=338, Invalid=2014, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 23:25:21,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-11-02 23:25:21,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 920. [2021-11-02 23:25:21,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 916 states have (on average 1.1375545851528384) internal successors, (1042), 919 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:21,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1042 transitions. [2021-11-02 23:25:21,174 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1042 transitions. Word has length 58 [2021-11-02 23:25:21,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:25:21,174 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 1042 transitions. [2021-11-02 23:25:21,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:21,175 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1042 transitions. [2021-11-02 23:25:21,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 23:25:21,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:25:21,176 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:25:21,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 23:25:21,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-02 23:25:21,390 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:25:21,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:25:21,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1270412305, now seen corresponding path program 3 times [2021-11-02 23:25:21,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:25:21,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030350315] [2021-11-02 23:25:21,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:25:21,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:25:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:25:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:25:21,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:25:21,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030350315] [2021-11-02 23:25:21,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030350315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:21,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538994936] [2021-11-02 23:25:21,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:25:21,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:25:21,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:25:21,866 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:25:21,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 23:25:24,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 23:25:24,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:25:24,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-02 23:25:24,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:25:25,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:25:25,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:25,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:25:25,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:25,132 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-02 23:25:25,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-11-02 23:25:25,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:25,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:25,148 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-02 23:25:25,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 65 [2021-11-02 23:25:25,160 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-02 23:25:25,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 82 [2021-11-02 23:25:25,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:25,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:25,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:25,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:25:25,456 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 23:25:25,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 86 [2021-11-02 23:25:25,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:25,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:25,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:25,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:25:25,466 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 23:25:25,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 95 [2021-11-02 23:25:25,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:25:25,867 INFO L354 Elim1Store]: treesize reduction 172, result has 17.3 percent of original size [2021-11-02 23:25:25,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 351 treesize of output 201 [2021-11-02 23:25:25,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:25:25,915 INFO L354 Elim1Store]: treesize reduction 228, result has 17.4 percent of original size [2021-11-02 23:25:25,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 174 treesize of output 154 [2021-11-02 23:25:25,938 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-02 23:25:25,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 142 treesize of output 149 [2021-11-02 23:25:26,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:26,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:25:26,556 INFO L354 Elim1Store]: treesize reduction 304, result has 15.8 percent of original size [2021-11-02 23:25:26,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 435 treesize of output 241 [2021-11-02 23:25:26,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:25:26,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:25:26,602 INFO L354 Elim1Store]: treesize reduction 402, result has 13.0 percent of original size [2021-11-02 23:25:26,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 307 treesize of output 292 [2021-11-02 23:25:26,622 INFO L354 Elim1Store]: treesize reduction 60, result has 50.4 percent of original size [2021-11-02 23:25:26,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 274 treesize of output 302 [2021-11-02 23:25:29,843 INFO L354 Elim1Store]: treesize reduction 527, result has 3.3 percent of original size [2021-11-02 23:25:29,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 19 new quantified variables, introduced 66 case distinctions, treesize of input 434 treesize of output 194 [2021-11-02 23:25:29,976 INFO L354 Elim1Store]: treesize reduction 471, result has 2.1 percent of original size [2021-11-02 23:25:29,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 129 treesize of output 86 [2021-11-02 23:25:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:25:29,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538994936] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:29,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:25:29,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-11-02 23:25:29,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314653907] [2021-11-02 23:25:29,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:25:29,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:25:29,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:25:29,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:25:29,987 INFO L87 Difference]: Start difference. First operand 920 states and 1042 transitions. Second operand has 21 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:49,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:25:49,273 INFO L93 Difference]: Finished difference Result 1481 states and 1671 transitions. [2021-11-02 23:25:49,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-02 23:25:49,274 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-02 23:25:49,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:25:49,279 INFO L225 Difference]: With dead ends: 1481 [2021-11-02 23:25:49,279 INFO L226 Difference]: Without dead ends: 1479 [2021-11-02 23:25:49,280 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=484, Invalid=2596, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 23:25:49,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2021-11-02 23:25:49,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1003. [2021-11-02 23:25:49,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 999 states have (on average 1.1341341341341342) internal successors, (1133), 1002 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:49,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1133 transitions. [2021-11-02 23:25:49,393 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1133 transitions. Word has length 58 [2021-11-02 23:25:49,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:25:49,393 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 1133 transitions. [2021-11-02 23:25:49,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:49,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1133 transitions. [2021-11-02 23:25:49,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 23:25:49,394 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:25:49,395 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:25:49,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 23:25:49,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-02 23:25:49,605 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:25:49,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:25:49,606 INFO L85 PathProgramCache]: Analyzing trace with hash 887737519, now seen corresponding path program 1 times [2021-11-02 23:25:49,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:25:49,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964055803] [2021-11-02 23:25:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:25:49,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:25:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:25:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:25:50,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:25:50,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964055803] [2021-11-02 23:25:50,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964055803] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:50,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360367754] [2021-11-02 23:25:50,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:25:50,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:25:50,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:25:50,221 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:25:50,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 23:25:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:25:53,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:25:53,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:25:55,899 INFO L354 Elim1Store]: treesize reduction 3, result has 93.9 percent of original size [2021-11-02 23:25:55,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 149 treesize of output 111 [2021-11-02 23:25:55,922 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-11-02 23:25:55,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 85 [2021-11-02 23:25:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:25:55,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360367754] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:55,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:25:55,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-11-02 23:25:55,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875425482] [2021-11-02 23:25:55,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:25:55,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:25:55,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:25:55,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=350, Unknown=1, NotChecked=0, Total=420 [2021-11-02 23:25:55,931 INFO L87 Difference]: Start difference. First operand 1003 states and 1133 transitions. Second operand has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 21 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:52,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:26:52,431 INFO L93 Difference]: Finished difference Result 1126 states and 1257 transitions. [2021-11-02 23:26:52,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 23:26:52,431 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 21 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-02 23:26:52,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:26:52,436 INFO L225 Difference]: With dead ends: 1126 [2021-11-02 23:26:52,436 INFO L226 Difference]: Without dead ends: 1124 [2021-11-02 23:26:52,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=311, Invalid=1757, Unknown=2, NotChecked=0, Total=2070 [2021-11-02 23:26:52,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2021-11-02 23:26:52,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 992. [2021-11-02 23:26:52,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 988 states have (on average 1.1376518218623481) internal successors, (1124), 991 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:52,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1124 transitions. [2021-11-02 23:26:52,547 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1124 transitions. Word has length 60 [2021-11-02 23:26:52,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:26:52,548 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 1124 transitions. [2021-11-02 23:26:52,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 21 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:52,548 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1124 transitions. [2021-11-02 23:26:52,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 23:26:52,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:26:52,549 INFO L513 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:26:52,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-02 23:26:52,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-02 23:26:52,750 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:26:52,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:26:52,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1901172939, now seen corresponding path program 1 times [2021-11-02 23:26:52,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:26:52,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423172937] [2021-11-02 23:26:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:26:52,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:26:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:26:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 23:26:52,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:26:52,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423172937] [2021-11-02 23:26:52,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423172937] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:52,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175823864] [2021-11-02 23:26:52,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:26:52,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:52,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:26:52,998 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:26:53,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 23:26:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:26:56,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 23:26:56,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:26:56,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:26:56,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:26:56,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:26:56,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:26:56,243 INFO L354 Elim1Store]: treesize reduction 87, result has 9.4 percent of original size [2021-11-02 23:26:56,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 287 treesize of output 209 [2021-11-02 23:26:56,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:26:56,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:26:56,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:26:56,253 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-02 23:26:56,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 63 [2021-11-02 23:26:56,266 INFO L354 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2021-11-02 23:26:56,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 94 [2021-11-02 23:26:56,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:26:56,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:26:56,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:26:56,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:26:56,601 INFO L354 Elim1Store]: treesize reduction 152, result has 21.6 percent of original size [2021-11-02 23:26:56,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 214 treesize of output 162 [2021-11-02 23:26:56,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:26:56,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:26:56,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:26:56,650 INFO L354 Elim1Store]: treesize reduction 234, result has 18.8 percent of original size [2021-11-02 23:26:56,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 201 treesize of output 160 [2021-11-02 23:26:56,663 INFO L354 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2021-11-02 23:26:56,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 151 treesize of output 157 [2021-11-02 23:26:57,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:26:57,111 INFO L354 Elim1Store]: treesize reduction 226, result has 18.4 percent of original size [2021-11-02 23:26:57,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 181 treesize of output 147 [2021-11-02 23:26:57,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:26:57,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:26:57,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:26:57,173 INFO L354 Elim1Store]: treesize reduction 348, result has 15.7 percent of original size [2021-11-02 23:26:57,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 182 treesize of output 192 [2021-11-02 23:26:57,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~end~0.offset] [2021-11-02 23:26:57,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:26:57,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 23:26:57,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397390388] [2021-11-02 23:26:57,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:26:57,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:26:57,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:26:57,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:26:57,854 INFO L87 Difference]: Start difference. First operand 992 states and 1124 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:58,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:26:58,584 INFO L93 Difference]: Finished difference Result 1027 states and 1158 transitions. [2021-11-02 23:26:58,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:26:58,585 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-02 23:26:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:26:58,588 INFO L225 Difference]: With dead ends: 1027 [2021-11-02 23:26:58,589 INFO L226 Difference]: Without dead ends: 991 [2021-11-02 23:26:58,589 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:26:58,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-11-02 23:26:58,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 967. [2021-11-02 23:26:58,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 963 states have (on average 1.1401869158878504) internal successors, (1098), 966 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:58,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1098 transitions. [2021-11-02 23:26:58,692 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1098 transitions. Word has length 60 [2021-11-02 23:26:58,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:26:58,692 INFO L470 AbstractCegarLoop]: Abstraction has 967 states and 1098 transitions. [2021-11-02 23:26:58,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:58,692 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1098 transitions. [2021-11-02 23:26:58,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 23:26:58,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:26:58,694 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:26:58,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-02 23:26:58,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-02 23:26:58,910 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:26:58,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:26:58,910 INFO L85 PathProgramCache]: Analyzing trace with hash 402946338, now seen corresponding path program 2 times [2021-11-02 23:26:58,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:26:58,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196332832] [2021-11-02 23:26:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:26:58,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:26:58,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:26:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:26:59,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:26:59,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196332832] [2021-11-02 23:26:59,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196332832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:59,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035703342] [2021-11-02 23:26:59,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:26:59,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:59,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:26:59,372 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:26:59,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 23:27:02,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:27:02,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:27:02,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-02 23:27:02,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:27:02,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:27:02,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:02,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:27:02,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:02,742 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-02 23:27:02,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-11-02 23:27:02,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:02,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:02,759 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-02 23:27:02,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 65 [2021-11-02 23:27:02,771 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-02 23:27:02,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 82 [2021-11-02 23:27:03,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:03,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:03,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:03,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:03,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:27:03,057 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 23:27:03,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 86 [2021-11-02 23:27:03,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:03,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:03,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:03,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:03,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:27:03,073 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 23:27:03,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 79 [2021-11-02 23:27:03,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:27:03,524 INFO L354 Elim1Store]: treesize reduction 172, result has 17.3 percent of original size [2021-11-02 23:27:03,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 351 treesize of output 201 [2021-11-02 23:27:03,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:27:03,570 INFO L354 Elim1Store]: treesize reduction 228, result has 17.4 percent of original size [2021-11-02 23:27:03,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 174 treesize of output 154 [2021-11-02 23:27:03,590 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-02 23:27:03,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 142 treesize of output 149 [2021-11-02 23:27:04,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:04,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:27:04,100 INFO L354 Elim1Store]: treesize reduction 322, result has 12.0 percent of original size [2021-11-02 23:27:04,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 364 treesize of output 316 [2021-11-02 23:27:04,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:04,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:27:04,162 INFO L354 Elim1Store]: treesize reduction 130, result has 21.7 percent of original size [2021-11-02 23:27:04,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 185 treesize of output 169 [2021-11-02 23:27:04,182 INFO L354 Elim1Store]: treesize reduction 60, result has 50.4 percent of original size [2021-11-02 23:27:04,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 274 treesize of output 302 [2021-11-02 23:27:08,190 INFO L354 Elim1Store]: treesize reduction 527, result has 3.3 percent of original size [2021-11-02 23:27:08,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 19 new quantified variables, introduced 66 case distinctions, treesize of input 430 treesize of output 190 [2021-11-02 23:27:08,313 INFO L354 Elim1Store]: treesize reduction 471, result has 2.1 percent of original size [2021-11-02 23:27:08,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 127 treesize of output 84 [2021-11-02 23:27:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:08,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035703342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:27:08,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:27:08,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-11-02 23:27:08,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743928828] [2021-11-02 23:27:08,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:27:08,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:27:08,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:27:08,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:27:08,327 INFO L87 Difference]: Start difference. First operand 967 states and 1098 transitions. Second operand has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:19,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:27:19,073 INFO L93 Difference]: Finished difference Result 1438 states and 1622 transitions. [2021-11-02 23:27:19,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-02 23:27:19,073 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-02 23:27:19,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:27:19,078 INFO L225 Difference]: With dead ends: 1438 [2021-11-02 23:27:19,078 INFO L226 Difference]: Without dead ends: 1436 [2021-11-02 23:27:19,079 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=484, Invalid=2596, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 23:27:19,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2021-11-02 23:27:19,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 977. [2021-11-02 23:27:19,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 973 states have (on average 1.1387461459403905) internal successors, (1108), 976 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:19,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1108 transitions. [2021-11-02 23:27:19,185 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1108 transitions. Word has length 61 [2021-11-02 23:27:19,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:27:19,185 INFO L470 AbstractCegarLoop]: Abstraction has 977 states and 1108 transitions. [2021-11-02 23:27:19,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:19,185 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1108 transitions. [2021-11-02 23:27:19,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 23:27:19,187 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:27:19,187 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:27:19,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-02 23:27:19,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-02 23:27:19,394 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:27:19,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:27:19,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1176461816, now seen corresponding path program 5 times [2021-11-02 23:27:19,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:27:19,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046589456] [2021-11-02 23:27:19,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:27:19,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:27:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:27:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:19,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:27:19,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046589456] [2021-11-02 23:27:19,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046589456] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:27:19,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150711236] [2021-11-02 23:27:19,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:27:19,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:27:19,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:27:19,704 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:27:19,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 23:27:23,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-02 23:27:23,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:27:23,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 23:27:23,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:27:23,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:27:23,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:23,345 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-02 23:27:23,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-11-02 23:27:23,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:23,365 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-02 23:27:23,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 62 [2021-11-02 23:27:23,379 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 23:27:23,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-11-02 23:27:23,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:23,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:23,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2021-11-02 23:27:23,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:23,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:23,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:23,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2021-11-02 23:27:24,039 INFO L354 Elim1Store]: treesize reduction 172, result has 17.3 percent of original size [2021-11-02 23:27:24,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 345 treesize of output 195 [2021-11-02 23:27:24,083 INFO L354 Elim1Store]: treesize reduction 228, result has 17.4 percent of original size [2021-11-02 23:27:24,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 168 treesize of output 148 [2021-11-02 23:27:24,092 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-02 23:27:24,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 130 [2021-11-02 23:27:24,443 INFO L354 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2021-11-02 23:27:24,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 132 treesize of output 125 [2021-11-02 23:27:24,457 INFO L354 Elim1Store]: treesize reduction 117, result has 11.4 percent of original size [2021-11-02 23:27:24,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 164 treesize of output 174 [2021-11-02 23:27:26,060 INFO L354 Elim1Store]: treesize reduction 262, result has 5.4 percent of original size [2021-11-02 23:27:26,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 375 treesize of output 154 [2021-11-02 23:27:26,106 INFO L354 Elim1Store]: treesize reduction 246, result has 2.8 percent of original size [2021-11-02 23:27:26,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 88 treesize of output 55 [2021-11-02 23:27:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:26,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150711236] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:27:26,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:27:26,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-11-02 23:27:26,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105668412] [2021-11-02 23:27:26,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:27:26,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:27:26,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:27:26,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:27:26,125 INFO L87 Difference]: Start difference. First operand 977 states and 1108 transitions. Second operand has 21 states, 21 states have (on average 5.571428571428571) internal successors, (117), 21 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:35,483 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-02 23:27:35,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-02 23:27:35,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-02 23:27:35,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-02 23:27:35,684 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:128) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:662) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:281) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:93) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:162) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:201) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:886) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:783) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Broken pipe at java.base/java.io.FileOutputStream.writeBytes(Native Method) at java.base/java.io.FileOutputStream.write(FileOutputStream.java:354) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 35 more [2021-11-02 23:27:35,688 INFO L168 Benchmark]: Toolchain (without parser) took 405390.72 ms. Allocated memory was 90.2 MB in the beginning and 1.1 GB in the end (delta: 992.0 MB). Free memory was 54.4 MB in the beginning and 232.1 MB in the end (delta: -177.7 MB). Peak memory consumption was 813.6 MB. Max. memory is 16.1 GB. [2021-11-02 23:27:35,688 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 90.2 MB. Free memory was 62.9 MB in the beginning and 62.9 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 23:27:35,689 INFO L168 Benchmark]: CACSL2BoogieTranslator took 660.82 ms. Allocated memory is still 90.2 MB. Free memory was 54.2 MB in the beginning and 55.9 MB in the end (delta: -1.7 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2021-11-02 23:27:35,689 INFO L168 Benchmark]: Boogie Procedure Inliner took 89.58 ms. Allocated memory is still 90.2 MB. Free memory was 55.5 MB in the beginning and 53.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 23:27:35,689 INFO L168 Benchmark]: Boogie Preprocessor took 58.31 ms. Allocated memory is still 90.2 MB. Free memory was 53.4 MB in the beginning and 51.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 23:27:35,689 INFO L168 Benchmark]: RCFGBuilder took 657.33 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 51.2 MB in the beginning and 82.2 MB in the end (delta: -31.0 MB). Peak memory consumption was 24.4 MB. Max. memory is 16.1 GB. [2021-11-02 23:27:35,689 INFO L168 Benchmark]: TraceAbstraction took 403919.00 ms. Allocated memory was 109.1 MB in the beginning and 1.1 GB in the end (delta: 973.1 MB). Free memory was 82.2 MB in the beginning and 232.1 MB in the end (delta: -149.8 MB). Peak memory consumption was 823.4 MB. Max. memory is 16.1 GB. [2021-11-02 23:27:35,691 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 90.2 MB. Free memory was 62.9 MB in the beginning and 62.9 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 660.82 ms. Allocated memory is still 90.2 MB. Free memory was 54.2 MB in the beginning and 55.9 MB in the end (delta: -1.7 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 89.58 ms. Allocated memory is still 90.2 MB. Free memory was 55.5 MB in the beginning and 53.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 58.31 ms. Allocated memory is still 90.2 MB. Free memory was 53.4 MB in the beginning and 51.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 657.33 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 51.2 MB in the beginning and 82.2 MB in the end (delta: -31.0 MB). Peak memory consumption was 24.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 403919.00 ms. Allocated memory was 109.1 MB in the beginning and 1.1 GB in the end (delta: 973.1 MB). Free memory was 82.2 MB in the beginning and 232.1 MB in the end (delta: -149.8 MB). Peak memory consumption was 823.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-01-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 652acbc8fb2d659424086f7ee4bd5fc2f45ff1d49f46cde68db4fdee1ed0638e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:27:37,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:27:37,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:27:37,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:27:37,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:27:37,960 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:27:37,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:27:37,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:27:37,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:27:37,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:27:37,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:27:37,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:27:37,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:27:37,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:27:37,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:27:37,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:27:37,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:27:37,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:27:37,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:27:37,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:27:37,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:27:37,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:27:37,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:27:37,988 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:27:37,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:27:37,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:27:37,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:27:37,993 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:27:37,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:27:37,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:27:37,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:27:37,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:27:37,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:27:37,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:27:37,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:27:38,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:27:38,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:27:38,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:27:38,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:27:38,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:27:38,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:27:38,004 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-02 23:27:38,034 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:27:38,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:27:38,036 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:27:38,036 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:27:38,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:27:38,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:27:38,038 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:27:38,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:27:38,039 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:27:38,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:27:38,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:27:38,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:27:38,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:27:38,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:27:38,041 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-02 23:27:38,041 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-02 23:27:38,041 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:27:38,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:27:38,042 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:27:38,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:27:38,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:27:38,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:27:38,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:27:38,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:27:38,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:27:38,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:27:38,044 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:27:38,044 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-02 23:27:38,044 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-02 23:27:38,044 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:27:38,045 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:27:38,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:27:38,045 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:27:38,046 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-02 23:27:38,046 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 652acbc8fb2d659424086f7ee4bd5fc2f45ff1d49f46cde68db4fdee1ed0638e [2021-11-02 23:27:38,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:27:38,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:27:38,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:27:38,431 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:27:38,431 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:27:38,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/forester-heap/dll-01-2.i [2021-11-02 23:27:38,496 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/data/58c2621e8/46f4a55762ac44a6ba902bd0b1666ce7/FLAG7cf8f2a62 [2021-11-02 23:27:39,099 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:27:39,100 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i [2021-11-02 23:27:39,119 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/data/58c2621e8/46f4a55762ac44a6ba902bd0b1666ce7/FLAG7cf8f2a62 [2021-11-02 23:27:39,371 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/data/58c2621e8/46f4a55762ac44a6ba902bd0b1666ce7 [2021-11-02 23:27:39,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:27:39,376 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:27:39,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:27:39,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:27:39,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:27:39,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:27:39" (1/1) ... [2021-11-02 23:27:39,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23774fba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:27:39, skipping insertion in model container [2021-11-02 23:27:39,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:27:39" (1/1) ... [2021-11-02 23:27:39,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:27:39,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:27:39,756 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[22080,22093] [2021-11-02 23:27:39,785 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[22353,22366] [2021-11-02 23:27:39,788 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[22587,22600] [2021-11-02 23:27:39,790 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[22657,22670] [2021-11-02 23:27:39,793 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[22924,22937] [2021-11-02 23:27:39,796 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23032,23045] [2021-11-02 23:27:39,801 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23263,23276] [2021-11-02 23:27:39,804 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23343,23356] [2021-11-02 23:27:39,806 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23422,23435] [2021-11-02 23:27:39,810 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23512,23525] [2021-11-02 23:27:39,812 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23690,23703] [2021-11-02 23:27:39,814 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23768,23781] [2021-11-02 23:27:39,817 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23845,23858] [2021-11-02 23:27:39,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:27:39,840 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:27:39,897 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[22080,22093] [2021-11-02 23:27:39,911 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[22353,22366] [2021-11-02 23:27:39,916 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[22587,22600] [2021-11-02 23:27:39,920 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[22657,22670] [2021-11-02 23:27:39,922 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[22924,22937] [2021-11-02 23:27:39,925 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23032,23045] [2021-11-02 23:27:39,927 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23263,23276] [2021-11-02 23:27:39,929 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23343,23356] [2021-11-02 23:27:39,935 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23422,23435] [2021-11-02 23:27:39,936 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23512,23525] [2021-11-02 23:27:39,937 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23690,23703] [2021-11-02 23:27:39,940 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23768,23781] [2021-11-02 23:27:39,941 WARN L228 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_6339f398-d245-4f0d-b732-1ee108d6d9aa/sv-benchmarks/c/forester-heap/dll-01-2.i[23845,23858] [2021-11-02 23:27:39,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:27:39,993 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:27:39,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:27:39 WrapperNode [2021-11-02 23:27:39,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:27:39,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:27:39,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:27:39,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:27:40,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:27:39" (1/1) ... [2021-11-02 23:27:40,036 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:27:39" (1/1) ... [2021-11-02 23:27:40,085 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:27:40,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:27:40,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:27:40,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:27:40,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:27:39" (1/1) ... [2021-11-02 23:27:40,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:27:39" (1/1) ... [2021-11-02 23:27:40,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:27:39" (1/1) ... [2021-11-02 23:27:40,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:27:39" (1/1) ... [2021-11-02 23:27:40,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:27:39" (1/1) ... [2021-11-02 23:27:40,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:27:39" (1/1) ... [2021-11-02 23:27:40,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:27:39" (1/1) ... [2021-11-02 23:27:40,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:27:40,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:27:40,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:27:40,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:27:40,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:27:39" (1/1) ... [2021-11-02 23:27:40,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:27:40,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:27:40,198 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:27:40,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:27:40,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 23:27:40,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 23:27:40,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:27:40,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 23:27:40,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 23:27:40,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-02 23:27:40,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:27:40,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:27:40,913 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:27:40,914 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2021-11-02 23:27:40,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:27:40 BoogieIcfgContainer [2021-11-02 23:27:40,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:27:40,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:27:40,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:27:40,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:27:40,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:27:39" (1/3) ... [2021-11-02 23:27:40,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65ea923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:27:40, skipping insertion in model container [2021-11-02 23:27:40,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:27:39" (2/3) ... [2021-11-02 23:27:40,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65ea923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:27:40, skipping insertion in model container [2021-11-02 23:27:40,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:27:40" (3/3) ... [2021-11-02 23:27:40,924 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-01-2.i [2021-11-02 23:27:40,930 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:27:40,930 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-11-02 23:27:40,979 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:27:40,986 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 23:27:40,986 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-11-02 23:27:41,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 66 states have (on average 2.0) internal successors, (132), 79 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:41,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-02 23:27:41,031 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:27:41,032 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-02 23:27:41,032 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:27:41,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:27:41,052 INFO L85 PathProgramCache]: Analyzing trace with hash 925700, now seen corresponding path program 1 times [2021-11-02 23:27:41,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:27:41,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332810073] [2021-11-02 23:27:41,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:27:41,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:27:41,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:27:41,072 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:27:41,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-02 23:27:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:27:41,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 23:27:41,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:27:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:41,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:27:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:41,274 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:27:41,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332810073] [2021-11-02 23:27:41,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332810073] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:27:41,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:27:41,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-02 23:27:41,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152050029] [2021-11-02 23:27:41,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:27:41,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:27:41,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:27:41,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:27:41,307 INFO L87 Difference]: Start difference. First operand has 80 states, 66 states have (on average 2.0) internal successors, (132), 79 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:41,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:27:41,444 INFO L93 Difference]: Finished difference Result 174 states and 290 transitions. [2021-11-02 23:27:41,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:27:41,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-02 23:27:41,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:27:41,458 INFO L225 Difference]: With dead ends: 174 [2021-11-02 23:27:41,458 INFO L226 Difference]: Without dead ends: 92 [2021-11-02 23:27:41,462 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:27:41,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-02 23:27:41,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2021-11-02 23:27:41,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.3387096774193548) internal successors, (83), 73 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-11-02 23:27:41,515 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 4 [2021-11-02 23:27:41,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:27:41,515 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-11-02 23:27:41,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:41,515 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-11-02 23:27:41,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-02 23:27:41,516 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:27:41,516 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:27:41,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:27:41,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:27:41,717 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:27:41,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:27:41,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1534452756, now seen corresponding path program 1 times [2021-11-02 23:27:41,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:27:41,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207448686] [2021-11-02 23:27:41,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:27:41,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:27:41,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:27:41,734 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:27:41,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-02 23:27:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:27:41,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:27:41,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:27:41,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:27:41,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:27:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:42,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:27:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:42,116 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:27:42,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207448686] [2021-11-02 23:27:42,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207448686] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:27:42,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:27:42,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 23:27:42,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043721035] [2021-11-02 23:27:42,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:27:42,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:27:42,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:27:42,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:27:42,125 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:42,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:27:42,614 INFO L93 Difference]: Finished difference Result 195 states and 217 transitions. [2021-11-02 23:27:42,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:27:42,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-02 23:27:42,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:27:42,616 INFO L225 Difference]: With dead ends: 195 [2021-11-02 23:27:42,616 INFO L226 Difference]: Without dead ends: 128 [2021-11-02 23:27:42,618 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:27:42,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-02 23:27:42,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 76. [2021-11-02 23:27:42,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 64 states have (on average 1.328125) internal successors, (85), 75 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:42,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2021-11-02 23:27:42,630 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 9 [2021-11-02 23:27:42,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:27:42,630 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2021-11-02 23:27:42,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:42,631 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2021-11-02 23:27:42,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-02 23:27:42,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:27:42,631 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:27:42,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:27:42,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:27:42,832 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:27:42,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:27:42,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1534454678, now seen corresponding path program 1 times [2021-11-02 23:27:42,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:27:42,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063869475] [2021-11-02 23:27:42,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:27:42,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:27:42,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:27:42,837 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:27:42,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-02 23:27:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:27:42,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:27:42,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:27:42,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:27:42,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:27:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:43,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:27:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:43,093 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:27:43,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063869475] [2021-11-02 23:27:43,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063869475] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:27:43,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:27:43,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 23:27:43,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489581691] [2021-11-02 23:27:43,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:27:43,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:27:43,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:27:43,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:27:43,096 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:43,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:27:43,516 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2021-11-02 23:27:43,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:27:43,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-02 23:27:43,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:27:43,519 INFO L225 Difference]: With dead ends: 129 [2021-11-02 23:27:43,519 INFO L226 Difference]: Without dead ends: 127 [2021-11-02 23:27:43,519 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:27:43,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-02 23:27:43,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 77. [2021-11-02 23:27:43,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.323076923076923) internal successors, (86), 76 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:43,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2021-11-02 23:27:43,528 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 9 [2021-11-02 23:27:43,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:27:43,528 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2021-11-02 23:27:43,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:43,528 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2021-11-02 23:27:43,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-02 23:27:43,529 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:27:43,529 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:27:43,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:27:43,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:27:43,730 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:27:43,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:27:43,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1536301720, now seen corresponding path program 1 times [2021-11-02 23:27:43,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:27:43,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533181074] [2021-11-02 23:27:43,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:27:43,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:27:43,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:27:43,732 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:27:43,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-02 23:27:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:27:43,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 23:27:43,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:27:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:43,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:27:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:44,051 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:27:44,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533181074] [2021-11-02 23:27:44,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533181074] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:27:44,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:27:44,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-02 23:27:44,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749230573] [2021-11-02 23:27:44,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:27:44,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:27:44,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:27:44,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:27:44,053 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:44,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:27:44,617 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-11-02 23:27:44,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:27:44,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-02 23:27:44,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:27:44,619 INFO L225 Difference]: With dead ends: 79 [2021-11-02 23:27:44,619 INFO L226 Difference]: Without dead ends: 77 [2021-11-02 23:27:44,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:27:44,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-02 23:27:44,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-11-02 23:27:44,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 73 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-11-02 23:27:44,626 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 9 [2021-11-02 23:27:44,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:27:44,627 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-11-02 23:27:44,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:44,627 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-11-02 23:27:44,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-02 23:27:44,628 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:27:44,628 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:27:44,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-02 23:27:44,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:27:44,837 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:27:44,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:27:44,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1743237117, now seen corresponding path program 1 times [2021-11-02 23:27:44,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:27:44,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585910842] [2021-11-02 23:27:44,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:27:44,839 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:27:44,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:27:44,840 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:27:44,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-02 23:27:44,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:27:44,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:27:44,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:27:44,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:27:45,072 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 23:27:45,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2021-11-02 23:27:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:45,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:27:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:45,176 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:27:45,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585910842] [2021-11-02 23:27:45,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585910842] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:27:45,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:27:45,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 3] imperfect sequences [] total 5 [2021-11-02 23:27:45,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761556449] [2021-11-02 23:27:45,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:27:45,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:27:45,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:27:45,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:27:45,179 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:45,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:27:45,708 INFO L93 Difference]: Finished difference Result 118 states and 132 transitions. [2021-11-02 23:27:45,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:27:45,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-02 23:27:45,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:27:45,712 INFO L225 Difference]: With dead ends: 118 [2021-11-02 23:27:45,712 INFO L226 Difference]: Without dead ends: 114 [2021-11-02 23:27:45,712 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:27:45,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-02 23:27:45,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 70. [2021-11-02 23:27:45,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 61 states have (on average 1.2950819672131149) internal successors, (79), 69 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:45,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2021-11-02 23:27:45,719 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 13 [2021-11-02 23:27:45,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:27:45,719 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2021-11-02 23:27:45,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:45,719 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2021-11-02 23:27:45,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 23:27:45,720 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:27:45,720 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:27:45,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-02 23:27:45,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:27:45,943 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:27:45,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:27:45,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1794227426, now seen corresponding path program 1 times [2021-11-02 23:27:45,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:27:45,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193281544] [2021-11-02 23:27:45,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:27:45,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:27:45,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:27:45,945 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:27:45,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-02 23:27:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:27:46,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:27:46,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:27:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:46,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:27:46,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:46,161 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:27:46,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193281544] [2021-11-02 23:27:46,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193281544] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:27:46,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:27:46,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 23:27:46,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817443955] [2021-11-02 23:27:46,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:27:46,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:27:46,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:27:46,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:27:46,164 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:46,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:27:46,432 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2021-11-02 23:27:46,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:27:46,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-02 23:27:46,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:27:46,434 INFO L225 Difference]: With dead ends: 129 [2021-11-02 23:27:46,434 INFO L226 Difference]: Without dead ends: 109 [2021-11-02 23:27:46,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:27:46,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-02 23:27:46,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 69. [2021-11-02 23:27:46,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 61 states have (on average 1.278688524590164) internal successors, (78), 68 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:46,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2021-11-02 23:27:46,442 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 14 [2021-11-02 23:27:46,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:27:46,442 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2021-11-02 23:27:46,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:46,442 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2021-11-02 23:27:46,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 23:27:46,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:27:46,443 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:27:46,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:27:46,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:27:46,656 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:27:46,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:27:46,656 INFO L85 PathProgramCache]: Analyzing trace with hash -140282483, now seen corresponding path program 1 times [2021-11-02 23:27:46,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:27:46,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864237541] [2021-11-02 23:27:46,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:27:46,657 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:27:46,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:27:46,663 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:27:46,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-02 23:27:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:27:46,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 23:27:46,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:27:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:46,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:27:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:46,849 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:27:46,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864237541] [2021-11-02 23:27:46,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864237541] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:27:46,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:27:46,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-02 23:27:46,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932041295] [2021-11-02 23:27:46,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:27:46,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:27:46,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:27:46,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:27:46,851 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:46,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:27:46,896 INFO L93 Difference]: Finished difference Result 152 states and 173 transitions. [2021-11-02 23:27:46,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:27:46,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-02 23:27:46,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:27:46,898 INFO L225 Difference]: With dead ends: 152 [2021-11-02 23:27:46,898 INFO L226 Difference]: Without dead ends: 111 [2021-11-02 23:27:46,898 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:27:46,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-02 23:27:46,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 82. [2021-11-02 23:27:46,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 74 states have (on average 1.2972972972972974) internal successors, (96), 81 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:46,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2021-11-02 23:27:46,909 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 18 [2021-11-02 23:27:46,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:27:46,910 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2021-11-02 23:27:46,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:46,910 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2021-11-02 23:27:46,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 23:27:46,912 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:27:46,912 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:27:46,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-02 23:27:47,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:27:47,125 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:27:47,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:27:47,125 INFO L85 PathProgramCache]: Analyzing trace with hash -53794182, now seen corresponding path program 1 times [2021-11-02 23:27:47,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:27:47,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328386051] [2021-11-02 23:27:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:27:47,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:27:47,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:27:47,127 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:27:47,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-02 23:27:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:27:47,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:27:47,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:27:47,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:27:47,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:27:47,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-02 23:27:47,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-02 23:27:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:47,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:27:47,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:47,571 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:27:47,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328386051] [2021-11-02 23:27:47,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328386051] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:27:47,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:27:47,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-02 23:27:47,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023210698] [2021-11-02 23:27:47,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:27:47,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:27:47,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:27:47,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:27:47,573 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:48,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:27:48,328 INFO L93 Difference]: Finished difference Result 210 states and 246 transitions. [2021-11-02 23:27:48,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:27:48,328 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-02 23:27:48,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:27:48,330 INFO L225 Difference]: With dead ends: 210 [2021-11-02 23:27:48,330 INFO L226 Difference]: Without dead ends: 156 [2021-11-02 23:27:48,330 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:27:48,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-02 23:27:48,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 91. [2021-11-02 23:27:48,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 83 states have (on average 1.2771084337349397) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:48,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-11-02 23:27:48,339 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 19 [2021-11-02 23:27:48,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:27:48,339 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-11-02 23:27:48,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:48,340 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-11-02 23:27:48,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 23:27:48,341 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:27:48,341 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:27:48,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-02 23:27:48,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:27:48,554 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:27:48,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:27:48,555 INFO L85 PathProgramCache]: Analyzing trace with hash -746851846, now seen corresponding path program 1 times [2021-11-02 23:27:48,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:27:48,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627372386] [2021-11-02 23:27:48,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:27:48,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:27:48,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:27:48,556 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:27:48,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-02 23:27:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:27:48,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:27:48,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:27:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:48,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:27:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:48,803 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:27:48,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627372386] [2021-11-02 23:27:48,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627372386] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:27:48,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:27:48,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-02 23:27:48,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417499161] [2021-11-02 23:27:48,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:27:48,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:27:48,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:27:48,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:27:48,805 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:48,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:27:48,834 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2021-11-02 23:27:48,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:27:48,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-02 23:27:48,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:27:48,836 INFO L225 Difference]: With dead ends: 91 [2021-11-02 23:27:48,836 INFO L226 Difference]: Without dead ends: 89 [2021-11-02 23:27:48,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:27:48,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-02 23:27:48,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-02 23:27:48,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 82 states have (on average 1.2560975609756098) internal successors, (103), 88 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:48,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2021-11-02 23:27:48,843 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 19 [2021-11-02 23:27:48,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:27:48,843 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2021-11-02 23:27:48,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:48,843 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2021-11-02 23:27:48,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 23:27:48,844 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:27:48,844 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:27:48,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-02 23:27:49,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:27:49,057 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:27:49,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:27:49,057 INFO L85 PathProgramCache]: Analyzing trace with hash -169331172, now seen corresponding path program 1 times [2021-11-02 23:27:49,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:27:49,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153966023] [2021-11-02 23:27:49,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:27:49,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:27:49,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:27:49,059 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:27:49,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-02 23:27:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:27:49,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:27:49,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:27:49,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:27:49,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:27:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:49,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:27:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:49,350 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:27:49,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153966023] [2021-11-02 23:27:49,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153966023] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:27:49,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:27:49,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 23:27:49,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953074117] [2021-11-02 23:27:49,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:27:49,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:27:49,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:27:49,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:27:49,353 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:49,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:27:49,714 INFO L93 Difference]: Finished difference Result 165 states and 192 transitions. [2021-11-02 23:27:49,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:27:49,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-02 23:27:49,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:27:49,717 INFO L225 Difference]: With dead ends: 165 [2021-11-02 23:27:49,717 INFO L226 Difference]: Without dead ends: 97 [2021-11-02 23:27:49,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:27:49,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-02 23:27:49,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2021-11-02 23:27:49,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 84 states have (on average 1.25) internal successors, (105), 90 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:49,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 105 transitions. [2021-11-02 23:27:49,724 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 105 transitions. Word has length 20 [2021-11-02 23:27:49,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:27:49,724 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 105 transitions. [2021-11-02 23:27:49,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:49,724 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 105 transitions. [2021-11-02 23:27:49,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 23:27:49,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:27:49,726 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:27:49,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-02 23:27:49,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:27:49,934 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:27:49,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:27:49,934 INFO L85 PathProgramCache]: Analyzing trace with hash -169329250, now seen corresponding path program 1 times [2021-11-02 23:27:49,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:27:49,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087513927] [2021-11-02 23:27:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:27:49,935 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:27:49,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:27:49,936 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:27:49,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-02 23:27:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:27:50,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:27:50,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:27:50,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:27:50,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:27:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:50,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:27:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:50,234 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:27:50,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087513927] [2021-11-02 23:27:50,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087513927] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:27:50,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:27:50,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 23:27:50,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866148031] [2021-11-02 23:27:50,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:27:50,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:27:50,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:27:50,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:27:50,240 INFO L87 Difference]: Start difference. First operand 91 states and 105 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:50,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:27:50,826 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2021-11-02 23:27:50,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:27:50,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-02 23:27:50,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:27:50,828 INFO L225 Difference]: With dead ends: 98 [2021-11-02 23:27:50,828 INFO L226 Difference]: Without dead ends: 96 [2021-11-02 23:27:50,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:27:50,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-02 23:27:50,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2021-11-02 23:27:50,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 91 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:50,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2021-11-02 23:27:50,845 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 20 [2021-11-02 23:27:50,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:27:50,845 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2021-11-02 23:27:50,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:50,845 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2021-11-02 23:27:50,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 23:27:50,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:27:50,847 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:27:50,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-02 23:27:51,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:27:51,060 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:27:51,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:27:51,060 INFO L85 PathProgramCache]: Analyzing trace with hash -167482208, now seen corresponding path program 1 times [2021-11-02 23:27:51,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:27:51,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833706402] [2021-11-02 23:27:51,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:27:51,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:27:51,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:27:51,063 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:27:51,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-02 23:27:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:27:51,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 23:27:51,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:27:51,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:51,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:27:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:51,415 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:27:51,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833706402] [2021-11-02 23:27:51,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833706402] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:27:51,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:27:51,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-02 23:27:51,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645616769] [2021-11-02 23:27:51,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:27:51,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:27:51,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:27:51,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:27:51,417 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:51,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:27:51,747 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2021-11-02 23:27:51,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:27:51,748 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-02 23:27:51,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:27:51,748 INFO L225 Difference]: With dead ends: 93 [2021-11-02 23:27:51,749 INFO L226 Difference]: Without dead ends: 91 [2021-11-02 23:27:51,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:27:51,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-02 23:27:51,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2021-11-02 23:27:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 88 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2021-11-02 23:27:51,754 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 20 [2021-11-02 23:27:51,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:27:51,754 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2021-11-02 23:27:51,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:51,754 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2021-11-02 23:27:51,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 23:27:51,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:27:51,756 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:27:51,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-02 23:27:51,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:27:51,962 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:27:51,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:27:51,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1528659518, now seen corresponding path program 1 times [2021-11-02 23:27:51,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:27:51,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903383672] [2021-11-02 23:27:51,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:27:51,963 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:27:51,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:27:51,964 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:27:51,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-02 23:27:52,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:27:52,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:27:52,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:27:52,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:27:52,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:52,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:52,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:27:52,269 INFO L354 Elim1Store]: treesize reduction 87, result has 9.4 percent of original size [2021-11-02 23:27:52,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 287 treesize of output 209 [2021-11-02 23:27:52,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:52,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:27:52,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:27:52,289 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-02 23:27:52,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 63 [2021-11-02 23:27:52,300 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-02 23:27:52,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 84 [2021-11-02 23:27:53,041 INFO L354 Elim1Store]: treesize reduction 52, result has 5.5 percent of original size [2021-11-02 23:27:53,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 54 [2021-11-02 23:27:53,062 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-02 23:27:53,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 28 [2021-11-02 23:27:53,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:53,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:28:04,923 WARN L207 SmtUtils]: Spent 11.48 s on a formula simplification. DAG size of input: 109 DAG size of output: 50 [2021-11-02 23:28:04,924 INFO L354 Elim1Store]: treesize reduction 2350, result has 11.4 percent of original size [2021-11-02 23:28:04,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 13933 treesize of output 13217 [2021-11-02 23:28:05,132 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 23:28:05,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1149 treesize of output 1127 [2021-11-02 23:28:05,185 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-02 23:28:05,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 522 treesize of output 326 [2021-11-02 23:28:05,207 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 23:28:05,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 310 [2021-11-02 23:28:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:28:05,502 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:28:05,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903383672] [2021-11-02 23:28:05,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903383672] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:28:05,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:28:05,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-02 23:28:05,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877961562] [2021-11-02 23:28:05,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:28:05,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:28:05,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:28:05,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:28:05,504 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:10,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:28:10,351 INFO L93 Difference]: Finished difference Result 273 states and 308 transitions. [2021-11-02 23:28:10,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:28:10,352 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-02 23:28:10,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:28:10,355 INFO L225 Difference]: With dead ends: 273 [2021-11-02 23:28:10,355 INFO L226 Difference]: Without dead ends: 271 [2021-11-02 23:28:10,355 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:28:10,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-02 23:28:10,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 100. [2021-11-02 23:28:10,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.2340425531914894) internal successors, (116), 99 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:10,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2021-11-02 23:28:10,367 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 22 [2021-11-02 23:28:10,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:28:10,367 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2021-11-02 23:28:10,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:10,368 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2021-11-02 23:28:10,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:28:10,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:28:10,369 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:28:10,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-02 23:28:10,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:28:10,582 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:28:10,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:28:10,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1978772808, now seen corresponding path program 1 times [2021-11-02 23:28:10,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:28:10,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007097322] [2021-11-02 23:28:10,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:28:10,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:28:10,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:28:10,585 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:28:10,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-02 23:28:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:28:10,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:28:10,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:28:10,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:28:10,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:28:11,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-02 23:28:11,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-02 23:28:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:28:11,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:28:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:28:11,270 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:28:11,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007097322] [2021-11-02 23:28:11,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007097322] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:28:11,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:28:11,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 23:28:11,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204595402] [2021-11-02 23:28:11,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:28:11,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:28:11,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:28:11,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:28:11,272 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:11,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:28:11,658 INFO L93 Difference]: Finished difference Result 157 states and 182 transitions. [2021-11-02 23:28:11,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:28:11,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 23:28:11,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:28:11,661 INFO L225 Difference]: With dead ends: 157 [2021-11-02 23:28:11,661 INFO L226 Difference]: Without dead ends: 139 [2021-11-02 23:28:11,661 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:28:11,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-02 23:28:11,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 130. [2021-11-02 23:28:11,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 124 states have (on average 1.2580645161290323) internal successors, (156), 129 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:11,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 156 transitions. [2021-11-02 23:28:11,671 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 156 transitions. Word has length 24 [2021-11-02 23:28:11,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:28:11,671 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 156 transitions. [2021-11-02 23:28:11,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:11,672 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 156 transitions. [2021-11-02 23:28:11,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:28:11,673 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:28:11,673 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:28:11,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-02 23:28:11,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:28:11,886 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:28:11,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:28:11,886 INFO L85 PathProgramCache]: Analyzing trace with hash -802276552, now seen corresponding path program 1 times [2021-11-02 23:28:11,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:28:11,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277194881] [2021-11-02 23:28:11,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:28:11,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:28:11,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:28:11,889 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:28:11,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-02 23:28:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:28:12,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 23:28:12,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:28:12,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-11-02 23:28:12,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 23:28:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:28:12,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:28:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:28:12,553 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:28:12,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277194881] [2021-11-02 23:28:12,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277194881] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:28:12,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:28:12,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-02 23:28:12,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655945093] [2021-11-02 23:28:12,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:28:12,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:28:12,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:28:12,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:28:12,555 INFO L87 Difference]: Start difference. First operand 130 states and 156 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:13,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:28:13,811 INFO L93 Difference]: Finished difference Result 279 states and 328 transitions. [2021-11-02 23:28:13,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:28:13,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 23:28:13,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:28:13,813 INFO L225 Difference]: With dead ends: 279 [2021-11-02 23:28:13,813 INFO L226 Difference]: Without dead ends: 227 [2021-11-02 23:28:13,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:28:13,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-02 23:28:13,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 139. [2021-11-02 23:28:13,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 133 states have (on average 1.2481203007518797) internal successors, (166), 138 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:13,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2021-11-02 23:28:13,827 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 24 [2021-11-02 23:28:13,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:28:13,828 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2021-11-02 23:28:13,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:13,828 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2021-11-02 23:28:13,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:28:13,829 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:28:13,829 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:28:13,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-02 23:28:14,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:28:14,044 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:28:14,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:28:14,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1498546038, now seen corresponding path program 1 times [2021-11-02 23:28:14,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:28:14,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944712628] [2021-11-02 23:28:14,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:28:14,045 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:28:14,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:28:14,046 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:28:14,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-02 23:28:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:28:14,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:28:14,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:28:14,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-02 23:28:14,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-02 23:28:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:28:14,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:28:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:28:14,832 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:28:14,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944712628] [2021-11-02 23:28:14,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944712628] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:28:14,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:28:14,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-02 23:28:14,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591319530] [2021-11-02 23:28:14,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:28:14,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:28:14,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:28:14,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:28:14,835 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:15,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:28:15,686 INFO L93 Difference]: Finished difference Result 201 states and 237 transitions. [2021-11-02 23:28:15,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:28:15,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 23:28:15,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:28:15,689 INFO L225 Difference]: With dead ends: 201 [2021-11-02 23:28:15,689 INFO L226 Difference]: Without dead ends: 183 [2021-11-02 23:28:15,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:28:15,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-02 23:28:15,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 144. [2021-11-02 23:28:15,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 138 states have (on average 1.2391304347826086) internal successors, (171), 143 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:15,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 171 transitions. [2021-11-02 23:28:15,701 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 171 transitions. Word has length 24 [2021-11-02 23:28:15,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:28:15,701 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 171 transitions. [2021-11-02 23:28:15,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:15,702 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 171 transitions. [2021-11-02 23:28:15,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 23:28:15,702 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:28:15,703 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:28:15,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-02 23:28:15,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:28:15,918 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:28:15,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:28:15,919 INFO L85 PathProgramCache]: Analyzing trace with hash -753351988, now seen corresponding path program 1 times [2021-11-02 23:28:15,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:28:15,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176448221] [2021-11-02 23:28:15,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:28:15,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:28:15,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:28:15,920 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:28:15,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-02 23:28:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:28:16,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:28:16,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:28:16,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:28:16,701 INFO L354 Elim1Store]: treesize reduction 494, result has 13.2 percent of original size [2021-11-02 23:28:16,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 408 treesize of output 401 [2021-11-02 23:28:16,749 INFO L354 Elim1Store]: treesize reduction 178, result has 9.6 percent of original size [2021-11-02 23:28:16,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 304 treesize of output 237 [2021-11-02 23:28:16,785 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-02 23:28:16,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 237 treesize of output 237 [2021-11-02 23:28:16,854 INFO L354 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2021-11-02 23:28:16,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 25 [2021-11-02 23:28:16,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:16,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-11-02 23:28:16,963 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 23:28:16,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 10 [2021-11-02 23:28:17,828 INFO L354 Elim1Store]: treesize reduction 74, result has 3.9 percent of original size [2021-11-02 23:28:17,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 56 [2021-11-02 23:28:17,848 INFO L354 Elim1Store]: treesize reduction 56, result has 5.1 percent of original size [2021-11-02 23:28:17,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 26 [2021-11-02 23:28:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:28:17,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:28:18,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1014 treesize of output 872 [2021-11-02 23:28:18,193 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 23:28:18,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1198 treesize of output 1182 [2021-11-02 23:28:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:28:18,335 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:28:18,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176448221] [2021-11-02 23:28:18,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176448221] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:28:18,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:28:18,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-02 23:28:18,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350546028] [2021-11-02 23:28:18,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:28:18,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:28:18,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:28:18,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:28:18,338 INFO L87 Difference]: Start difference. First operand 144 states and 171 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:21,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:28:21,093 INFO L93 Difference]: Finished difference Result 355 states and 418 transitions. [2021-11-02 23:28:21,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:28:21,094 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-02 23:28:21,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:28:21,097 INFO L225 Difference]: With dead ends: 355 [2021-11-02 23:28:21,097 INFO L226 Difference]: Without dead ends: 353 [2021-11-02 23:28:21,097 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:28:21,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-02 23:28:21,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 150. [2021-11-02 23:28:21,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 144 states have (on average 1.2291666666666667) internal successors, (177), 149 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:21,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 177 transitions. [2021-11-02 23:28:21,114 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 177 transitions. Word has length 25 [2021-11-02 23:28:21,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:28:21,115 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 177 transitions. [2021-11-02 23:28:21,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:21,130 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 177 transitions. [2021-11-02 23:28:21,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 23:28:21,130 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:28:21,130 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:28:21,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-02 23:28:21,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:28:21,331 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:28:21,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:28:21,331 INFO L85 PathProgramCache]: Analyzing trace with hash 486182162, now seen corresponding path program 1 times [2021-11-02 23:28:21,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:28:21,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423866005] [2021-11-02 23:28:21,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:28:21,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:28:21,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:28:21,333 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:28:21,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-02 23:28:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:28:21,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:28:21,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:28:21,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-02 23:28:21,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-02 23:28:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:28:21,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:28:22,024 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-02 23:28:22,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-02 23:28:22,036 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-02 23:28:22,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-02 23:28:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:28:22,120 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:28:22,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423866005] [2021-11-02 23:28:22,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [423866005] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 23:28:22,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:28:22,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-02 23:28:22,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507329171] [2021-11-02 23:28:22,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:28:22,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:28:22,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:28:22,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:28:22,122 INFO L87 Difference]: Start difference. First operand 150 states and 177 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:23,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:28:23,288 INFO L93 Difference]: Finished difference Result 353 states and 419 transitions. [2021-11-02 23:28:23,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:28:23,289 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-02 23:28:23,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:28:23,291 INFO L225 Difference]: With dead ends: 353 [2021-11-02 23:28:23,291 INFO L226 Difference]: Without dead ends: 255 [2021-11-02 23:28:23,291 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:28:23,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-02 23:28:23,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 200. [2021-11-02 23:28:23,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 194 states have (on average 1.2422680412371134) internal successors, (241), 199 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:23,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 241 transitions. [2021-11-02 23:28:23,315 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 241 transitions. Word has length 27 [2021-11-02 23:28:23,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:28:23,316 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 241 transitions. [2021-11-02 23:28:23,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:23,316 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 241 transitions. [2021-11-02 23:28:23,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:28:23,317 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:28:23,317 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:28:23,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-02 23:28:23,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:28:23,530 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:28:23,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:28:23,531 INFO L85 PathProgramCache]: Analyzing trace with hash -721495, now seen corresponding path program 1 times [2021-11-02 23:28:23,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:28:23,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700979405] [2021-11-02 23:28:23,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:28:23,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:28:23,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:28:23,532 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:28:23,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-02 23:28:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:28:23,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:28:23,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:28:23,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:28:23,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:28:23,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:28:24,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:24,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:24,299 INFO L354 Elim1Store]: treesize reduction 78, result has 23.5 percent of original size [2021-11-02 23:28:24,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 185 treesize of output 150 [2021-11-02 23:28:24,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:24,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:24,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:24,378 INFO L354 Elim1Store]: treesize reduction 74, result has 27.5 percent of original size [2021-11-02 23:28:24,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 88 [2021-11-02 23:28:24,393 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-02 23:28:24,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 94 [2021-11-02 23:28:24,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:24,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:24,883 INFO L354 Elim1Store]: treesize reduction 130, result has 22.2 percent of original size [2021-11-02 23:28:24,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 124 treesize of output 109 [2021-11-02 23:28:24,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:24,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:24,951 INFO L354 Elim1Store]: treesize reduction 168, result has 18.8 percent of original size [2021-11-02 23:28:24,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 125 treesize of output 129 [2021-11-02 23:28:25,830 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:28:25,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700979405] [2021-11-02 23:28:25,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~end~0.offset] [2021-11-02 23:28:25,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1482315810] [2021-11-02 23:28:25,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:28:25,831 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-02 23:28:25,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/cvc4 [2021-11-02 23:28:25,834 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-02 23:28:25,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-02 23:28:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:28:26,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 23:28:26,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:28:26,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:28:26,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:28:26,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:28:26,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:26,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:26,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:26,666 INFO L354 Elim1Store]: treesize reduction 78, result has 23.5 percent of original size [2021-11-02 23:28:26,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 185 treesize of output 150 [2021-11-02 23:28:26,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:26,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:26,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:26,724 INFO L354 Elim1Store]: treesize reduction 70, result has 25.5 percent of original size [2021-11-02 23:28:26,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 81 [2021-11-02 23:28:26,735 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 23:28:26,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 78 [2021-11-02 23:28:27,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:28:27,104 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-02 23:28:27,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 116 treesize of output 95 [2021-11-02 23:28:27,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:28:27,122 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-11-02 23:28:27,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 108 treesize of output 112 [2021-11-02 23:28:27,808 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-02 23:28:27,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 110 treesize of output 74 [2021-11-02 23:28:27,815 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-02 23:28:27,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 26 [2021-11-02 23:28:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:28:27,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:28:30,640 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~malloc12.base_12| (_ BitVec 32))) (or (let ((.cse0 (let ((.cse7 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~end~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~end~0.base) c_ULTIMATE.start_main_~end~0.offset (_ bv0 32))))) (store .cse7 |v_ULTIMATE.start_main_#t~malloc12.base_12| (store (select .cse7 |v_ULTIMATE.start_main_#t~malloc12.base_12|) (_ bv4 32) c_ULTIMATE.start_main_~end~0.offset))))) (let ((.cse2 (select (select .cse0 c_ULTIMATE.start_main_~end~0.base) c_ULTIMATE.start_main_~end~0.offset)) (.cse5 (let ((.cse6 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~end~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~end~0.base) c_ULTIMATE.start_main_~end~0.offset |v_ULTIMATE.start_main_#t~malloc12.base_12|)))) (store .cse6 |v_ULTIMATE.start_main_#t~malloc12.base_12| (store (select .cse6 |v_ULTIMATE.start_main_#t~malloc12.base_12|) (_ bv4 32) c_ULTIMATE.start_main_~end~0.base))))) (let ((.cse1 (select (select .cse5 c_ULTIMATE.start_main_~end~0.base) c_ULTIMATE.start_main_~end~0.offset)) (.cse3 (bvadd (_ bv8 32) .cse2)) (.cse4 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~list~0.offset))) (and (= (select (select (store .cse0 .cse1 (store (store (select .cse0 .cse1) .cse2 (_ bv0 32)) .cse3 (_ bv0 32))) c_ULTIMATE.start_main_~list~0.base) .cse4) (_ bv0 32)) (= (select (select (store .cse5 .cse1 (store (store (select .cse5 .cse1) .cse2 (_ bv0 32)) .cse3 (_ bv0 32))) c_ULTIMATE.start_main_~list~0.base) .cse4) (_ bv0 32)))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc12.base_12|))))))) is different from false [2021-11-02 23:28:33,228 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~malloc12.base_12| (_ BitVec 32))) (or (let ((.cse5 (let ((.cse7 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~list~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset (_ bv0 32))))) (store .cse7 |v_ULTIMATE.start_main_#t~malloc12.base_12| (store (select .cse7 |v_ULTIMATE.start_main_#t~malloc12.base_12|) (_ bv4 32) c_ULTIMATE.start_main_~list~0.offset))))) (let ((.cse2 (select (select .cse5 c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset)) (.cse0 (let ((.cse6 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset |v_ULTIMATE.start_main_#t~malloc12.base_12|)))) (store .cse6 |v_ULTIMATE.start_main_#t~malloc12.base_12| (store (select .cse6 |v_ULTIMATE.start_main_#t~malloc12.base_12|) (_ bv4 32) c_ULTIMATE.start_main_~list~0.base))))) (let ((.cse1 (select (select .cse0 c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset)) (.cse3 (bvadd (_ bv8 32) .cse2)) (.cse4 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~list~0.offset))) (and (= (select (select (store .cse0 .cse1 (store (store (select .cse0 .cse1) .cse2 (_ bv0 32)) .cse3 (_ bv0 32))) c_ULTIMATE.start_main_~list~0.base) .cse4) (_ bv0 32)) (= (select (select (store .cse5 .cse1 (store (store (select .cse5 .cse1) .cse2 (_ bv0 32)) .cse3 (_ bv0 32))) c_ULTIMATE.start_main_~list~0.base) .cse4) (_ bv0 32)))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc12.base_12|))))))) is different from false [2021-11-02 23:28:35,125 INFO L354 Elim1Store]: treesize reduction 97, result has 16.4 percent of original size [2021-11-02 23:28:35,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 1661 treesize of output 1645 [2021-11-02 23:28:35,212 INFO L354 Elim1Store]: treesize reduction 119, result has 15.0 percent of original size [2021-11-02 23:28:35,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 476 treesize of output 454 [2021-11-02 23:28:35,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 159 [2021-11-02 23:28:35,243 INFO L354 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2021-11-02 23:28:35,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 155 [2021-11-02 23:28:35,257 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-02 23:28:35,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 144 [2021-11-02 23:28:35,279 INFO L354 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2021-11-02 23:28:35,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 134 treesize of output 130 [2021-11-02 23:28:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-02 23:28:35,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1482315810] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 23:28:35,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:28:35,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-02 23:28:35,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861835589] [2021-11-02 23:28:35,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:28:35,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:28:35,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:28:35,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=158, Unknown=2, NotChecked=54, Total=272 [2021-11-02 23:28:35,356 INFO L87 Difference]: Start difference. First operand 200 states and 241 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:37,547 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse8 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~list~0.offset))) (and (forall ((|v_ULTIMATE.start_main_#t~malloc12.base_12| (_ BitVec 32))) (or (let ((.cse5 (let ((.cse7 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~list~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset (_ bv0 32))))) (store .cse7 |v_ULTIMATE.start_main_#t~malloc12.base_12| (store (select .cse7 |v_ULTIMATE.start_main_#t~malloc12.base_12|) (_ bv4 32) c_ULTIMATE.start_main_~list~0.offset))))) (let ((.cse2 (select (select .cse5 c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset)) (.cse0 (let ((.cse6 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset |v_ULTIMATE.start_main_#t~malloc12.base_12|)))) (store .cse6 |v_ULTIMATE.start_main_#t~malloc12.base_12| (store (select .cse6 |v_ULTIMATE.start_main_#t~malloc12.base_12|) (_ bv4 32) c_ULTIMATE.start_main_~list~0.base))))) (let ((.cse1 (select (select .cse0 c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset)) (.cse3 (bvadd (_ bv8 32) .cse2)) (.cse4 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~list~0.offset))) (and (= (select (select (store .cse0 .cse1 (store (store (select .cse0 .cse1) .cse2 (_ bv0 32)) .cse3 (_ bv0 32))) c_ULTIMATE.start_main_~list~0.base) .cse4) (_ bv0 32)) (= (select (select (store .cse5 .cse1 (store (store (select .cse5 .cse1) .cse2 (_ bv0 32)) .cse3 (_ bv0 32))) c_ULTIMATE.start_main_~list~0.base) .cse4) (_ bv0 32)))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc12.base_12|))))))) (= c_ULTIMATE.start_main_~list~0.offset (_ bv0 32)) (= (_ bv0 32) (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base) .cse8)) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~list~0.base) .cse8) (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~list~0.base))) (_ bv1 1))))) is different from false [2021-11-02 23:28:40,454 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~list~0.offset))) (and (= c_ULTIMATE.start_main_~list~0.offset (_ bv0 32)) (= c_ULTIMATE.start_main_~list~0.base c_ULTIMATE.start_main_~end~0.base) (= (_ bv0 32) (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base) .cse0)) (forall ((|v_ULTIMATE.start_main_#t~malloc12.base_12| (_ BitVec 32))) (or (let ((.cse1 (let ((.cse8 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~end~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~end~0.base) c_ULTIMATE.start_main_~end~0.offset (_ bv0 32))))) (store .cse8 |v_ULTIMATE.start_main_#t~malloc12.base_12| (store (select .cse8 |v_ULTIMATE.start_main_#t~malloc12.base_12|) (_ bv4 32) c_ULTIMATE.start_main_~end~0.offset))))) (let ((.cse3 (select (select .cse1 c_ULTIMATE.start_main_~end~0.base) c_ULTIMATE.start_main_~end~0.offset)) (.cse6 (let ((.cse7 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~end~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~end~0.base) c_ULTIMATE.start_main_~end~0.offset |v_ULTIMATE.start_main_#t~malloc12.base_12|)))) (store .cse7 |v_ULTIMATE.start_main_#t~malloc12.base_12| (store (select .cse7 |v_ULTIMATE.start_main_#t~malloc12.base_12|) (_ bv4 32) c_ULTIMATE.start_main_~end~0.base))))) (let ((.cse2 (select (select .cse6 c_ULTIMATE.start_main_~end~0.base) c_ULTIMATE.start_main_~end~0.offset)) (.cse4 (bvadd (_ bv8 32) .cse3)) (.cse5 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~list~0.offset))) (and (= (select (select (store .cse1 .cse2 (store (store (select .cse1 .cse2) .cse3 (_ bv0 32)) .cse4 (_ bv0 32))) c_ULTIMATE.start_main_~list~0.base) .cse5) (_ bv0 32)) (= (select (select (store .cse6 .cse2 (store (store (select .cse6 .cse2) .cse3 (_ bv0 32)) .cse4 (_ bv0 32))) c_ULTIMATE.start_main_~list~0.base) .cse5) (_ bv0 32)))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc12.base_12|))))))) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~list~0.base) .cse0) (_ bv0 32)) (= c_ULTIMATE.start_main_~end~0.offset c_ULTIMATE.start_main_~list~0.offset) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~list~0.base))) (_ bv1 1))))) is different from false [2021-11-02 23:28:47,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:28:47,734 INFO L93 Difference]: Finished difference Result 609 states and 722 transitions. [2021-11-02 23:28:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 23:28:47,735 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:28:47,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:28:47,740 INFO L225 Difference]: With dead ends: 609 [2021-11-02 23:28:47,741 INFO L226 Difference]: Without dead ends: 521 [2021-11-02 23:28:47,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=267, Invalid=867, Unknown=4, NotChecked=268, Total=1406 [2021-11-02 23:28:47,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-11-02 23:28:47,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 237. [2021-11-02 23:28:47,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 231 states have (on average 1.2294372294372293) internal successors, (284), 236 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:47,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 284 transitions. [2021-11-02 23:28:47,780 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 284 transitions. Word has length 32 [2021-11-02 23:28:47,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:28:47,780 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 284 transitions. [2021-11-02 23:28:47,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:47,782 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 284 transitions. [2021-11-02 23:28:47,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:28:47,784 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:28:47,784 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:28:47,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-02 23:28:48,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-02 23:28:48,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/cvc4 --incremental --print-success --lang smt [2021-11-02 23:28:48,199 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-02 23:28:48,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:28:48,200 INFO L85 PathProgramCache]: Analyzing trace with hash -572234199, now seen corresponding path program 1 times [2021-11-02 23:28:48,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:28:48,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158028948] [2021-11-02 23:28:48,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:28:48,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:28:48,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:28:48,201 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:28:48,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-02 23:28:48,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:28:48,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:28:48,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:28:48,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:28:48,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:48,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:48,830 INFO L354 Elim1Store]: treesize reduction 190, result has 8.2 percent of original size [2021-11-02 23:28:48,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 161 treesize of output 150 [2021-11-02 23:28:48,900 INFO L354 Elim1Store]: treesize reduction 27, result has 41.3 percent of original size [2021-11-02 23:28:48,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 201 treesize of output 208 [2021-11-02 23:28:48,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:48,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:48,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:28:48,941 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-02 23:28:48,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 98 [2021-11-02 23:28:49,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:49,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:49,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:28:50,044 INFO L354 Elim1Store]: treesize reduction 222, result has 18.4 percent of original size [2021-11-02 23:28:50,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 260 treesize of output 231 [2021-11-02 23:28:50,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:50,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:50,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:50,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:28:50,167 INFO L354 Elim1Store]: treesize reduction 152, result has 21.6 percent of original size [2021-11-02 23:28:50,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 194 treesize of output 142 [2021-11-02 23:28:50,197 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-11-02 23:28:50,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 159 [2021-11-02 23:28:51,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:51,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:28:51,253 INFO L354 Elim1Store]: treesize reduction 226, result has 18.4 percent of original size [2021-11-02 23:28:51,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 191 treesize of output 151 [2021-11-02 23:28:51,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:51,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:51,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:28:51,440 INFO L354 Elim1Store]: treesize reduction 348, result has 15.7 percent of original size [2021-11-02 23:28:51,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 192 treesize of output 202 [2021-11-02 23:28:52,954 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:28:52,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158028948] [2021-11-02 23:28:52,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~end~0.offset] [2021-11-02 23:28:52,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2006993596] [2021-11-02 23:28:52,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:28:52,957 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-02 23:28:52,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/cvc4 [2021-11-02 23:28:52,958 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-02 23:28:52,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6339f398-d245-4f0d-b732-1ee108d6d9aa/bin/uautomizer-tBqnrhUYjU/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-02 23:28:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:28:53,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:28:53,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:28:53,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:28:53,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:53,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:53,845 INFO L354 Elim1Store]: treesize reduction 190, result has 8.2 percent of original size [2021-11-02 23:28:53,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 162 treesize of output 151 [2021-11-02 23:28:53,918 INFO L354 Elim1Store]: treesize reduction 27, result has 41.3 percent of original size [2021-11-02 23:28:53,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 202 treesize of output 209 [2021-11-02 23:28:53,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:53,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:53,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:28:53,940 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-02 23:28:53,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 98 [2021-11-02 23:28:54,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:54,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:54,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:54,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:28:54,681 INFO L354 Elim1Store]: treesize reduction 156, result has 19.6 percent of original size [2021-11-02 23:28:54,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 260 treesize of output 204 [2021-11-02 23:28:54,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:54,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:54,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:28:54,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:28:54,788 INFO L354 Elim1Store]: treesize reduction 214, result has 18.9 percent of original size [2021-11-02 23:28:54,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 162 treesize of output 162 [2021-11-02 23:28:54,822 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-11-02 23:28:54,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 153 treesize of output 155 [2021-11-02 23:28:55,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:28:55,693 INFO L354 Elim1Store]: treesize reduction 66, result has 20.5 percent of original size [2021-11-02 23:28:55,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 17 case distinctions, treesize of input 173 treesize of output 133 [2021-11-02 23:28:55,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:28:55,758 INFO L354 Elim1Store]: treesize reduction 126, result has 15.4 percent of original size [2021-11-02 23:28:55,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 165 treesize of output 175 [2021-11-02 23:28:57,944 INFO L354 Elim1Store]: treesize reduction 155, result has 7.2 percent of original size [2021-11-02 23:28:57,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 179 treesize of output 106 [2021-11-02 23:28:58,007 INFO L354 Elim1Store]: treesize reduction 122, result has 2.4 percent of original size [2021-11-02 23:28:58,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 82 treesize of output 52 [2021-11-02 23:28:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:28:58,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:29:04,329 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~malloc12.base_16| (_ BitVec 32))) (let ((.cse10 (let ((.cse12 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~end~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~end~0.base) c_ULTIMATE.start_main_~end~0.offset (_ bv0 32))))) (store .cse12 |v_ULTIMATE.start_main_#t~malloc12.base_16| (store (select .cse12 |v_ULTIMATE.start_main_#t~malloc12.base_16|) (_ bv4 32) c_ULTIMATE.start_main_~end~0.offset))))) (let ((.cse8 (select (select .cse10 c_ULTIMATE.start_main_~end~0.base) c_ULTIMATE.start_main_~end~0.offset)) (.cse6 (let ((.cse11 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~end~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~end~0.base) c_ULTIMATE.start_main_~end~0.offset |v_ULTIMATE.start_main_#t~malloc12.base_16|)))) (store .cse11 |v_ULTIMATE.start_main_#t~malloc12.base_16| (store (select .cse11 |v_ULTIMATE.start_main_#t~malloc12.base_16|) (_ bv4 32) c_ULTIMATE.start_main_~end~0.base))))) (let ((.cse7 (select (select .cse6 c_ULTIMATE.start_main_~end~0.base) c_ULTIMATE.start_main_~end~0.offset)) (.cse9 (bvadd (_ bv8 32) .cse8))) (let ((.cse4 (store .cse10 .cse7 (store (store (select .cse10 .cse7) .cse8 (_ bv0 32)) .cse9 (_ bv0 32)))) (.cse2 (store .cse6 .cse7 (store (store (select .cse6 .cse7) .cse8 (_ bv0 32)) .cse9 (_ bv0 32)))) (.cse5 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~list~0.offset))) (let ((.cse1 (select (select .cse2 c_ULTIMATE.start_main_~list~0.base) .cse5)) (.cse0 (select (select .cse4 c_ULTIMATE.start_main_~list~0.base) .cse5))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc12.base_16|))) (and (= (_ bv0 32) .cse0) (= .cse1 (_ bv0 32))) (let ((.cse3 (bvadd (_ bv8 32) .cse0))) (and (= (select (select .cse2 .cse1) .cse3) (_ bv0 32)) (= (_ bv0 32) (select (select .cse4 .cse1) .cse3))))))))))) is different from false [2021-11-02 23:29:07,720 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~malloc12.base_16| (_ BitVec 32))) (let ((.cse10 (let ((.cse12 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~list~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset (_ bv0 32))))) (store .cse12 |v_ULTIMATE.start_main_#t~malloc12.base_16| (store (select .cse12 |v_ULTIMATE.start_main_#t~malloc12.base_16|) (_ bv4 32) c_ULTIMATE.start_main_~list~0.offset))))) (let ((.cse8 (select (select .cse10 c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset)) (.cse6 (let ((.cse11 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset |v_ULTIMATE.start_main_#t~malloc12.base_16|)))) (store .cse11 |v_ULTIMATE.start_main_#t~malloc12.base_16| (store (select .cse11 |v_ULTIMATE.start_main_#t~malloc12.base_16|) (_ bv4 32) c_ULTIMATE.start_main_~list~0.base))))) (let ((.cse7 (select (select .cse6 c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset)) (.cse9 (bvadd (_ bv8 32) .cse8))) (let ((.cse4 (store .cse10 .cse7 (store (store (select .cse10 .cse7) .cse8 (_ bv0 32)) .cse9 (_ bv0 32)))) (.cse2 (store .cse6 .cse7 (store (store (select .cse6 .cse7) .cse8 (_ bv0 32)) .cse9 (_ bv0 32)))) (.cse5 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~list~0.offset))) (let ((.cse1 (select (select .cse2 c_ULTIMATE.start_main_~list~0.base) .cse5)) (.cse0 (select (select .cse4 c_ULTIMATE.start_main_~list~0.base) .cse5))) (or (and (= .cse0 (_ bv0 32)) (= .cse1 (_ bv0 32))) (let ((.cse3 (bvadd .cse0 (_ bv8 32)))) (and (= (select (select .cse2 .cse1) .cse3) (_ bv0 32)) (= (select (select .cse4 .cse1) .cse3) (_ bv0 32)))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc12.base_16|)))))))))) is different from false [2021-11-02 23:29:15,704 INFO L354 Elim1Store]: treesize reduction 8982, result has 49.9 percent of original size [2021-11-02 23:29:15,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 4057522 treesize of output 4008266 [2021-11-02 23:29:25,438 WARN L207 SmtUtils]: Spent 7.63 s on a formula simplification. DAG size of input: 813 DAG size of output: 194 [2021-11-02 23:29:25,439 INFO L354 Elim1Store]: treesize reduction 5769, result has 7.5 percent of original size [2021-11-02 23:29:25,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 15 new quantified variables, introduced 90 case distinctions, treesize of input 21420604300 treesize of output 21279109083