./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5f08f0f0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 64bit --witnessprinter.graph.data.programhash ab48078691743837960e369bd318845908490844fac300de97818a03fa84d8a1 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5f08f0f [2021-11-05 12:56:09,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-05 12:56:09,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-05 12:56:09,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-05 12:56:09,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-05 12:56:09,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-05 12:56:09,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-05 12:56:09,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-05 12:56:09,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-05 12:56:09,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-05 12:56:09,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-05 12:56:09,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-05 12:56:09,808 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-05 12:56:09,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-05 12:56:09,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-05 12:56:09,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-05 12:56:09,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-05 12:56:09,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-05 12:56:09,820 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-05 12:56:09,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-05 12:56:09,825 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-05 12:56:09,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-05 12:56:09,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-05 12:56:09,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-05 12:56:09,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-05 12:56:09,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-05 12:56:09,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-05 12:56:09,837 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-05 12:56:09,838 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-05 12:56:09,839 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-05 12:56:09,839 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-05 12:56:09,840 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-05 12:56:09,841 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-05 12:56:09,841 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-05 12:56:09,842 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-05 12:56:09,842 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-05 12:56:09,842 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-05 12:56:09,842 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-05 12:56:09,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-05 12:56:09,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-05 12:56:09,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-05 12:56:09,844 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-05 12:56:09,867 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-05 12:56:09,868 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-05 12:56:09,869 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-05 12:56:09,869 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-05 12:56:09,870 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-05 12:56:09,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-05 12:56:09,871 INFO L138 SettingsManager]: * Use SBE=true [2021-11-05 12:56:09,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-05 12:56:09,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-05 12:56:09,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-05 12:56:09,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-05 12:56:09,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-05 12:56:09,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-05 12:56:09,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-05 12:56:09,873 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-05 12:56:09,873 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-05 12:56:09,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-05 12:56:09,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-05 12:56:09,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-05 12:56:09,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 12:56:09,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-05 12:56:09,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-05 12:56:09,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-05 12:56:09,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-05 12:56:09,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-05 12:56:09,875 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-05 12:56:09,875 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-05 12:56:09,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-05 12:56:09,875 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-05 12:56:09,876 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab48078691743837960e369bd318845908490844fac300de97818a03fa84d8a1 [2021-11-05 12:56:10,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-05 12:56:10,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-05 12:56:10,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-05 12:56:10,208 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-05 12:56:10,209 INFO L275 PluginConnector]: CDTParser initialized [2021-11-05 12:56:10,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i [2021-11-05 12:56:10,265 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b9b5f0f1/fd6bd0fbaf4e4572977d3df78da6848b/FLAG796e1acff [2021-11-05 12:56:11,054 INFO L306 CDTParser]: Found 1 translation units. [2021-11-05 12:56:11,054 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i [2021-11-05 12:56:11,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b9b5f0f1/fd6bd0fbaf4e4572977d3df78da6848b/FLAG796e1acff [2021-11-05 12:56:11,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b9b5f0f1/fd6bd0fbaf4e4572977d3df78da6848b [2021-11-05 12:56:11,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-05 12:56:11,285 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-05 12:56:11,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-05 12:56:11,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-05 12:56:11,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-05 12:56:11,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 12:56:11" (1/1) ... [2021-11-05 12:56:11,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2951119d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 12:56:11, skipping insertion in model container [2021-11-05 12:56:11,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 12:56:11" (1/1) ... [2021-11-05 12:56:11,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-05 12:56:11,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-05 12:56:11,750 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i[4498,4511] [2021-11-05 12:56:11,759 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i[4558,4571] [2021-11-05 12:56:11,787 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-05 12:56:11,793 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-05 12:56:12,626 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:12,627 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:12,628 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:12,629 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:12,630 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:12,644 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:12,644 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:12,645 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:12,646 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:12,971 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-05 12:56:12,972 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-05 12:56:12,974 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-05 12:56:12,975 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-05 12:56:12,976 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-05 12:56:12,976 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-05 12:56:12,977 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-05 12:56:12,977 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-05 12:56:12,978 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-05 12:56:12,978 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-05 12:56:13,135 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-05 12:56:13,210 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,211 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,505 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,506 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,533 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,534 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,542 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,563 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,578 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,580 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,582 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,582 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,583 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,583 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,584 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 12:56:13,673 INFO L203 MainTranslator]: Completed pre-run [2021-11-05 12:56:13,695 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i[4498,4511] [2021-11-05 12:56:13,696 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i[4558,4571] [2021-11-05 12:56:13,697 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-05 12:56:13,699 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-05 12:56:13,735 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,735 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,736 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,736 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,736 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,742 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,742 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,743 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,744 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,787 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-05 12:56:13,788 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-05 12:56:13,788 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-05 12:56:13,789 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-05 12:56:13,789 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-05 12:56:13,790 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-05 12:56:13,790 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-05 12:56:13,791 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-05 12:56:13,791 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-05 12:56:13,791 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-05 12:56:13,818 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-05 12:56:13,853 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,856 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,939 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,940 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,945 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,945 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,948 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,949 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,955 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,956 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,956 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,956 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,956 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,958 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,958 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 12:56:13,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 12:56:14,381 INFO L208 MainTranslator]: Completed translation [2021-11-05 12:56:14,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 12:56:14 WrapperNode [2021-11-05 12:56:14,382 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-05 12:56:14,383 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-05 12:56:14,383 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-05 12:56:14,383 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-05 12:56:14,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 12:56:14" (1/1) ... [2021-11-05 12:56:14,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 12:56:14" (1/1) ... [2021-11-05 12:56:14,606 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-05 12:56:14,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-05 12:56:14,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-05 12:56:14,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-05 12:56:14,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 12:56:14" (1/1) ... [2021-11-05 12:56:14,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 12:56:14" (1/1) ... [2021-11-05 12:56:14,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 12:56:14" (1/1) ... [2021-11-05 12:56:14,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 12:56:14" (1/1) ... [2021-11-05 12:56:14,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 12:56:14" (1/1) ... [2021-11-05 12:56:14,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 12:56:14" (1/1) ... [2021-11-05 12:56:14,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 12:56:14" (1/1) ... [2021-11-05 12:56:14,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-05 12:56:14,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-05 12:56:14,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-05 12:56:14,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-05 12:56:14,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 12:56:14" (1/1) ... [2021-11-05 12:56:14,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 12:56:14,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 12:56:14,773 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-05 12:56:14,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-05 12:56:14,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-05 12:56:14,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-05 12:56:14,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-05 12:56:14,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-05 12:56:14,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-05 12:56:14,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-05 12:56:14,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-05 12:56:14,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-05 12:56:14,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-05 12:56:14,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-05 12:56:14,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-05 12:56:24,187 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##187: assume !true; [2021-11-05 12:56:24,193 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-05 12:56:24,193 INFO L299 CfgBuilder]: Removed 43 assume(true) statements. [2021-11-05 12:56:24,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 12:56:24 BoogieIcfgContainer [2021-11-05 12:56:24,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-05 12:56:24,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-05 12:56:24,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-05 12:56:24,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-05 12:56:24,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.11 12:56:11" (1/3) ... [2021-11-05 12:56:24,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cd8a992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 12:56:24, skipping insertion in model container [2021-11-05 12:56:24,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 12:56:14" (2/3) ... [2021-11-05 12:56:24,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cd8a992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 12:56:24, skipping insertion in model container [2021-11-05 12:56:24,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 12:56:24" (3/3) ... [2021-11-05 12:56:24,201 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_hash_byte_cursor_ptr_harness.i [2021-11-05 12:56:24,205 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-05 12:56:24,206 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-05 12:56:24,241 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-05 12:56:24,247 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 [2021-11-05 12:56:24,247 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-05 12:56:24,262 INFO L276 IsEmpty]: Start isEmpty. Operand has 145 states, 142 states have (on average 1.556338028169014) internal successors, (221), 144 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:56:24,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-05 12:56:24,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 12:56:24,271 INFO L514 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, 1] [2021-11-05 12:56:24,272 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 12:56:24,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 12:56:24,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1720806424, now seen corresponding path program 1 times [2021-11-05 12:56:24,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 12:56:24,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067777049] [2021-11-05 12:56:24,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 12:56:24,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 12:56:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 12:56:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 12:56:24,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 12:56:24,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067777049] [2021-11-05 12:56:24,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067777049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 12:56:24,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 12:56:24,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-05 12:56:24,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006061194] [2021-11-05 12:56:24,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 12:56:24,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-05 12:56:24,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 12:56:24,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-05 12:56:24,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-05 12:56:24,872 INFO L87 Difference]: Start difference. First operand has 145 states, 142 states have (on average 1.556338028169014) internal successors, (221), 144 states have internal predecessors, (221), 0 states have call successors, (0), 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 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:56:24,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 12:56:24,898 INFO L93 Difference]: Finished difference Result 285 states and 436 transitions. [2021-11-05 12:56:24,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-05 12:56:24,900 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-11-05 12:56:24,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 12:56:24,909 INFO L225 Difference]: With dead ends: 285 [2021-11-05 12:56:24,909 INFO L226 Difference]: Without dead ends: 139 [2021-11-05 12:56:24,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.04ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-05 12:56:24,914 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.01ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-05 12:56:24,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 2.01ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-05 12:56:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-05 12:56:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-11-05 12:56:24,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 137 states have (on average 1.4963503649635037) internal successors, (205), 138 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) [2021-11-05 12:56:24,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 205 transitions. [2021-11-05 12:56:24,971 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 205 transitions. Word has length 33 [2021-11-05 12:56:24,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 12:56:24,972 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 205 transitions. [2021-11-05 12:56:24,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:56:24,972 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 205 transitions. [2021-11-05 12:56:24,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-05 12:56:24,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 12:56:24,974 INFO L514 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, 1] [2021-11-05 12:56:24,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-05 12:56:24,975 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 12:56:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 12:56:24,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1998426598, now seen corresponding path program 1 times [2021-11-05 12:56:24,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 12:56:24,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162274418] [2021-11-05 12:56:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 12:56:24,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 12:56:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 12:56:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 12:56:25,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 12:56:25,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162274418] [2021-11-05 12:56:25,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162274418] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 12:56:25,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 12:56:25,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 12:56:25,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342920612] [2021-11-05 12:56:25,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 12:56:25,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 12:56:25,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 12:56:25,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 12:56:25,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 12:56:25,335 INFO L87 Difference]: Start difference. First operand 139 states and 205 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:56:25,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 12:56:25,471 INFO L93 Difference]: Finished difference Result 257 states and 383 transitions. [2021-11-05 12:56:25,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 12:56:25,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-11-05 12:56:25,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 12:56:25,475 INFO L225 Difference]: With dead ends: 257 [2021-11-05 12:56:25,475 INFO L226 Difference]: Without dead ends: 139 [2021-11-05 12:56:25,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.80ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 12:56:25,477 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 241 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 81.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.96ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 112.31ms IncrementalHoareTripleChecker+Time [2021-11-05 12:56:25,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 334 Invalid, 24 Unknown, 0 Unchecked, 3.96ms Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 112.31ms Time] [2021-11-05 12:56:25,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-05 12:56:25,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-11-05 12:56:25,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 137 states have (on average 1.4744525547445255) internal successors, (202), 138 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:56:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 202 transitions. [2021-11-05 12:56:25,490 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 202 transitions. Word has length 33 [2021-11-05 12:56:25,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 12:56:25,490 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 202 transitions. [2021-11-05 12:56:25,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:56:25,491 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 202 transitions. [2021-11-05 12:56:25,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-05 12:56:25,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 12:56:25,495 INFO L514 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, 1, 1, 1, 1, 1] [2021-11-05 12:56:25,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-05 12:56:25,496 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 12:56:25,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 12:56:25,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1160971526, now seen corresponding path program 1 times [2021-11-05 12:56:25,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 12:56:25,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420784951] [2021-11-05 12:56:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 12:56:25,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 12:56:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 12:56:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 12:56:26,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 12:56:26,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420784951] [2021-11-05 12:56:26,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420784951] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 12:56:26,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 12:56:26,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-05 12:56:26,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170189693] [2021-11-05 12:56:26,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 12:56:26,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-05 12:56:26,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 12:56:26,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-05 12:56:26,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-05 12:56:26,050 INFO L87 Difference]: Start difference. First operand 139 states and 202 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:56:26,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 12:56:26,482 INFO L93 Difference]: Finished difference Result 160 states and 226 transitions. [2021-11-05 12:56:26,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-05 12:56:26,483 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-11-05 12:56:26,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 12:56:26,484 INFO L225 Difference]: With dead ends: 160 [2021-11-05 12:56:26,484 INFO L226 Difference]: Without dead ends: 139 [2021-11-05 12:56:26,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 439.19ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-11-05 12:56:26,485 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 750 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 115.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.77ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 138.09ms IncrementalHoareTripleChecker+Time [2021-11-05 12:56:26,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 400 Invalid, 33 Unknown, 0 Unchecked, 3.77ms Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 138.09ms Time] [2021-11-05 12:56:26,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-05 12:56:26,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-11-05 12:56:26,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 137 states have (on average 1.467153284671533) internal successors, (201), 138 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:56:26,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 201 transitions. [2021-11-05 12:56:26,501 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 201 transitions. Word has length 37 [2021-11-05 12:56:26,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 12:56:26,501 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 201 transitions. [2021-11-05 12:56:26,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:56:26,502 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 201 transitions. [2021-11-05 12:56:26,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-05 12:56:26,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 12:56:26,506 INFO L514 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 12:56:26,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-05 12:56:26,507 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 12:56:26,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 12:56:26,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1605875617, now seen corresponding path program 1 times [2021-11-05 12:56:26,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 12:56:26,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766027655] [2021-11-05 12:56:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 12:56:26,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 12:56:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 12:56:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 12:56:27,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 12:56:27,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766027655] [2021-11-05 12:56:27,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766027655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 12:56:27,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 12:56:27,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-05 12:56:27,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053165906] [2021-11-05 12:56:27,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 12:56:27,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-05 12:56:27,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 12:56:27,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-05 12:56:27,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-05 12:56:27,361 INFO L87 Difference]: Start difference. First operand 139 states and 201 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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) [2021-11-05 12:56:29,454 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:56:31,564 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:56:33,679 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:56:35,792 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:56:38,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 12:56:38,492 INFO L93 Difference]: Finished difference Result 310 states and 434 transitions. [2021-11-05 12:56:38,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-05 12:56:38,493 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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 [2021-11-05 12:56:38,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 12:56:38,494 INFO L225 Difference]: With dead ends: 310 [2021-11-05 12:56:38,494 INFO L226 Difference]: Without dead ends: 276 [2021-11-05 12:56:38,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 795.40ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-05 12:56:38,496 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 537 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 70 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9964.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.12ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10533.40ms IncrementalHoareTripleChecker+Time [2021-11-05 12:56:38,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 736 Invalid, 734 Unknown, 0 Unchecked, 13.12ms Time], IncrementalHoareTripleChecker [70 Valid, 660 Invalid, 4 Unknown, 0 Unchecked, 10533.40ms Time] [2021-11-05 12:56:38,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-05 12:56:38,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 173. [2021-11-05 12:56:38,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 171 states have (on average 1.4152046783625731) internal successors, (242), 172 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:56:38,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 242 transitions. [2021-11-05 12:56:38,508 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 242 transitions. Word has length 39 [2021-11-05 12:56:38,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 12:56:38,508 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 242 transitions. [2021-11-05 12:56:38,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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) [2021-11-05 12:56:38,509 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 242 transitions. [2021-11-05 12:56:38,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-05 12:56:38,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 12:56:38,510 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 12:56:38,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-05 12:56:38,510 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 12:56:38,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 12:56:38,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1939046429, now seen corresponding path program 1 times [2021-11-05 12:56:38,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 12:56:38,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823491310] [2021-11-05 12:56:38,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 12:56:38,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 12:56:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 12:56:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 12:56:39,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 12:56:39,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823491310] [2021-11-05 12:56:39,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823491310] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 12:56:39,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 12:56:39,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-05 12:56:39,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139364972] [2021-11-05 12:56:39,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 12:56:39,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-05 12:56:39,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 12:56:39,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-05 12:56:39,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-05 12:56:39,209 INFO L87 Difference]: Start difference. First operand 173 states and 242 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 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) [2021-11-05 12:56:41,274 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:56:43,363 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:56:45,439 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:56:48,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 12:56:48,042 INFO L93 Difference]: Finished difference Result 331 states and 454 transitions. [2021-11-05 12:56:48,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-05 12:56:48,043 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 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 [2021-11-05 12:56:48,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 12:56:48,044 INFO L225 Difference]: With dead ends: 331 [2021-11-05 12:56:48,044 INFO L226 Difference]: Without dead ends: 281 [2021-11-05 12:56:48,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 775.33ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-05 12:56:48,046 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 496 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 72 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7917.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.64ms SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8281.10ms IncrementalHoareTripleChecker+Time [2021-11-05 12:56:48,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 807 Invalid, 734 Unknown, 0 Unchecked, 11.64ms Time], IncrementalHoareTripleChecker [72 Valid, 659 Invalid, 3 Unknown, 0 Unchecked, 8281.10ms Time] [2021-11-05 12:56:48,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-05 12:56:48,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 194. [2021-11-05 12:56:48,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 192 states have (on average 1.3854166666666667) internal successors, (266), 193 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:56:48,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 266 transitions. [2021-11-05 12:56:48,059 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 266 transitions. Word has length 41 [2021-11-05 12:56:48,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 12:56:48,061 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 266 transitions. [2021-11-05 12:56:48,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 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) [2021-11-05 12:56:48,061 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 266 transitions. [2021-11-05 12:56:48,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-05 12:56:48,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 12:56:48,062 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 12:56:48,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-05 12:56:48,063 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 12:56:48,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 12:56:48,064 INFO L85 PathProgramCache]: Analyzing trace with hash 883226793, now seen corresponding path program 1 times [2021-11-05 12:56:48,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 12:56:48,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973049599] [2021-11-05 12:56:48,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 12:56:48,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 12:56:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 12:56:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 12:56:48,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 12:56:48,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973049599] [2021-11-05 12:56:48,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973049599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 12:56:48,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 12:56:48,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-05 12:56:48,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412515141] [2021-11-05 12:56:48,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 12:56:48,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-05 12:56:48,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 12:56:48,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-05 12:56:48,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-05 12:56:48,744 INFO L87 Difference]: Start difference. First operand 194 states and 266 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:56:50,813 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:56:52,943 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:56:55,046 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:56:57,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 12:56:57,304 INFO L93 Difference]: Finished difference Result 377 states and 515 transitions. [2021-11-05 12:56:57,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-05 12:56:57,305 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-11-05 12:56:57,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 12:56:57,307 INFO L225 Difference]: With dead ends: 377 [2021-11-05 12:56:57,307 INFO L226 Difference]: Without dead ends: 343 [2021-11-05 12:56:57,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 688.92ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-11-05 12:56:57,308 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 470 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 64 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7629.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.50ms SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8047.04ms IncrementalHoareTripleChecker+Time [2021-11-05 12:56:57,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 646 Invalid, 605 Unknown, 0 Unchecked, 13.50ms Time], IncrementalHoareTripleChecker [64 Valid, 538 Invalid, 3 Unknown, 0 Unchecked, 8047.04ms Time] [2021-11-05 12:56:57,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-05 12:56:57,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 201. [2021-11-05 12:56:57,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 199 states have (on average 1.3819095477386936) internal successors, (275), 200 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:56:57,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 275 transitions. [2021-11-05 12:56:57,316 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 275 transitions. Word has length 43 [2021-11-05 12:56:57,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 12:56:57,316 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 275 transitions. [2021-11-05 12:56:57,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:56:57,317 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 275 transitions. [2021-11-05 12:56:57,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-05 12:56:57,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 12:56:57,317 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 12:56:57,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-05 12:56:57,318 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 12:56:57,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 12:56:57,318 INFO L85 PathProgramCache]: Analyzing trace with hash -619864341, now seen corresponding path program 1 times [2021-11-05 12:56:57,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 12:56:57,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875201163] [2021-11-05 12:56:57,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 12:56:57,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 12:56:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 12:56:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 12:56:57,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 12:56:57,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875201163] [2021-11-05 12:56:57,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875201163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 12:56:57,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 12:56:57,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-05 12:56:57,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566670834] [2021-11-05 12:56:57,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 12:56:57,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-05 12:56:57,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 12:56:57,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-05 12:56:57,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-05 12:56:57,872 INFO L87 Difference]: Start difference. First operand 201 states and 275 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:56:59,925 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:57:02,041 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:57:04,138 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:57:06,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 12:57:06,393 INFO L93 Difference]: Finished difference Result 384 states and 520 transitions. [2021-11-05 12:57:06,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-05 12:57:06,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-11-05 12:57:06,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 12:57:06,397 INFO L225 Difference]: With dead ends: 384 [2021-11-05 12:57:06,397 INFO L226 Difference]: Without dead ends: 334 [2021-11-05 12:57:06,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 634.84ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-11-05 12:57:06,398 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 413 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 71 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7622.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.09ms SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8014.29ms IncrementalHoareTripleChecker+Time [2021-11-05 12:57:06,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 775 Invalid, 685 Unknown, 0 Unchecked, 7.09ms Time], IncrementalHoareTripleChecker [71 Valid, 611 Invalid, 3 Unknown, 0 Unchecked, 8014.29ms Time] [2021-11-05 12:57:06,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-05 12:57:06,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 194. [2021-11-05 12:57:06,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 192 states have (on average 1.3854166666666667) internal successors, (266), 193 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:57:06,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 266 transitions. [2021-11-05 12:57:06,406 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 266 transitions. Word has length 45 [2021-11-05 12:57:06,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 12:57:06,406 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 266 transitions. [2021-11-05 12:57:06,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:57:06,407 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 266 transitions. [2021-11-05 12:57:06,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-05 12:57:06,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 12:57:06,407 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 12:57:06,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-05 12:57:06,408 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 12:57:06,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 12:57:06,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1424515361, now seen corresponding path program 1 times [2021-11-05 12:57:06,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 12:57:06,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615339716] [2021-11-05 12:57:06,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 12:57:06,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 12:57:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 12:57:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 12:57:06,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 12:57:06,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615339716] [2021-11-05 12:57:06,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615339716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 12:57:06,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 12:57:06,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-05 12:57:06,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420644645] [2021-11-05 12:57:06,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 12:57:06,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-05 12:57:06,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 12:57:06,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-05 12:57:06,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-05 12:57:06,889 INFO L87 Difference]: Start difference. First operand 194 states and 266 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 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) [2021-11-05 12:57:07,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 12:57:07,353 INFO L93 Difference]: Finished difference Result 298 states and 395 transitions. [2021-11-05 12:57:07,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-05 12:57:07,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 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 47 [2021-11-05 12:57:07,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 12:57:07,356 INFO L225 Difference]: With dead ends: 298 [2021-11-05 12:57:07,356 INFO L226 Difference]: Without dead ends: 287 [2021-11-05 12:57:07,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 256.79ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-05 12:57:07,357 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 173 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 285.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.82ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 303.86ms IncrementalHoareTripleChecker+Time [2021-11-05 12:57:07,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 881 Invalid, 121 Unknown, 0 Unchecked, 1.82ms Time], IncrementalHoareTripleChecker [28 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 303.86ms Time] [2021-11-05 12:57:07,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-05 12:57:07,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 198. [2021-11-05 12:57:07,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 196 states have (on average 1.3724489795918366) internal successors, (269), 197 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:57:07,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 269 transitions. [2021-11-05 12:57:07,365 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 269 transitions. Word has length 47 [2021-11-05 12:57:07,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 12:57:07,366 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 269 transitions. [2021-11-05 12:57:07,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 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) [2021-11-05 12:57:07,366 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 269 transitions. [2021-11-05 12:57:07,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-05 12:57:07,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 12:57:07,367 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 12:57:07,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-05 12:57:07,367 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 12:57:07,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 12:57:07,368 INFO L85 PathProgramCache]: Analyzing trace with hash 197741849, now seen corresponding path program 1 times [2021-11-05 12:57:07,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 12:57:07,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801015507] [2021-11-05 12:57:07,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 12:57:07,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 12:57:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 12:57:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 12:57:08,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 12:57:08,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801015507] [2021-11-05 12:57:08,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801015507] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 12:57:08,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 12:57:08,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-05 12:57:08,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903297556] [2021-11-05 12:57:08,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 12:57:08,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-05 12:57:08,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 12:57:08,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-05 12:57:08,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-05 12:57:08,116 INFO L87 Difference]: Start difference. First operand 198 states and 269 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:57:08,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 12:57:08,705 INFO L93 Difference]: Finished difference Result 390 states and 522 transitions. [2021-11-05 12:57:08,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-05 12:57:08,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-11-05 12:57:08,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 12:57:08,707 INFO L225 Difference]: With dead ends: 390 [2021-11-05 12:57:08,707 INFO L226 Difference]: Without dead ends: 214 [2021-11-05 12:57:08,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 234.50ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-05 12:57:08,708 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 50 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 434.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.24ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 461.77ms IncrementalHoareTripleChecker+Time [2021-11-05 12:57:08,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1063 Invalid, 172 Unknown, 0 Unchecked, 2.24ms Time], IncrementalHoareTripleChecker [22 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 461.77ms Time] [2021-11-05 12:57:08,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-05 12:57:08,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 198. [2021-11-05 12:57:08,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 196 states have (on average 1.3571428571428572) internal successors, (266), 197 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:57:08,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 266 transitions. [2021-11-05 12:57:08,716 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 266 transitions. Word has length 51 [2021-11-05 12:57:08,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 12:57:08,717 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 266 transitions. [2021-11-05 12:57:08,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:57:08,717 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 266 transitions. [2021-11-05 12:57:08,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-05 12:57:08,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 12:57:08,718 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 12:57:08,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-05 12:57:08,718 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 12:57:08,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 12:57:08,719 INFO L85 PathProgramCache]: Analyzing trace with hash -189493142, now seen corresponding path program 1 times [2021-11-05 12:57:08,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 12:57:08,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048493764] [2021-11-05 12:57:08,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 12:57:08,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 12:57:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 12:57:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 12:57:09,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 12:57:09,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048493764] [2021-11-05 12:57:09,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048493764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 12:57:09,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 12:57:09,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-05 12:57:09,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201750861] [2021-11-05 12:57:09,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 12:57:09,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-05 12:57:09,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 12:57:09,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-05 12:57:09,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-05 12:57:09,709 INFO L87 Difference]: Start difference. First operand 198 states and 266 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 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) [2021-11-05 12:57:11,775 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:57:13,876 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:57:15,978 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:57:18,055 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:57:20,105 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:57:22,200 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:57:25,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 12:57:25,205 INFO L93 Difference]: Finished difference Result 388 states and 514 transitions. [2021-11-05 12:57:25,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-05 12:57:25,206 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 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 [2021-11-05 12:57:25,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 12:57:25,207 INFO L225 Difference]: With dead ends: 388 [2021-11-05 12:57:25,207 INFO L226 Difference]: Without dead ends: 360 [2021-11-05 12:57:25,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 985.26ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-11-05 12:57:25,209 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 744 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 55 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14128.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.00ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14774.35ms IncrementalHoareTripleChecker+Time [2021-11-05 12:57:25,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [744 Valid, 872 Invalid, 871 Unknown, 0 Unchecked, 9.00ms Time], IncrementalHoareTripleChecker [55 Valid, 810 Invalid, 6 Unknown, 0 Unchecked, 14774.35ms Time] [2021-11-05 12:57:25,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-05 12:57:25,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 231. [2021-11-05 12:57:25,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 229 states have (on average 1.3711790393013101) internal successors, (314), 230 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:57:25,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 314 transitions. [2021-11-05 12:57:25,218 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 314 transitions. Word has length 53 [2021-11-05 12:57:25,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 12:57:25,219 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 314 transitions. [2021-11-05 12:57:25,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 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) [2021-11-05 12:57:25,219 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 314 transitions. [2021-11-05 12:57:25,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-05 12:57:25,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 12:57:25,220 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 12:57:25,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-05 12:57:25,220 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 12:57:25,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 12:57:25,221 INFO L85 PathProgramCache]: Analyzing trace with hash -921169025, now seen corresponding path program 1 times [2021-11-05 12:57:25,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 12:57:25,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426681256] [2021-11-05 12:57:25,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 12:57:25,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 12:57:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 12:57:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 12:57:25,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 12:57:25,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426681256] [2021-11-05 12:57:25,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426681256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 12:57:25,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420880830] [2021-11-05 12:57:25,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 12:57:25,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 12:57:25,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 12:57:25,967 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 12:57:25,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-05 12:57:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 12:57:26,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 2870 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-05 12:57:26,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 12:57:27,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-05 12:57:27,535 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 17 treesize of output 12 [2021-11-05 12:57:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 12:57:27,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 12:57:27,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420880830] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 12:57:27,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-05 12:57:27,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2021-11-05 12:57:27,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405677611] [2021-11-05 12:57:27,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 12:57:27,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-05 12:57:27,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 12:57:27,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-05 12:57:27,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-05 12:57:27,781 INFO L87 Difference]: Start difference. First operand 231 states and 314 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:57:29,850 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:57:32,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 12:57:32,339 INFO L93 Difference]: Finished difference Result 474 states and 615 transitions. [2021-11-05 12:57:32,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-05 12:57:32,339 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-11-05 12:57:32,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 12:57:32,341 INFO L225 Difference]: With dead ends: 474 [2021-11-05 12:57:32,341 INFO L226 Difference]: Without dead ends: 339 [2021-11-05 12:57:32,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1455.99ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-11-05 12:57:32,342 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 781 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 21 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3558.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.42ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3822.15ms IncrementalHoareTripleChecker+Time [2021-11-05 12:57:32,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [781 Valid, 520 Invalid, 493 Unknown, 0 Unchecked, 7.42ms Time], IncrementalHoareTripleChecker [21 Valid, 471 Invalid, 1 Unknown, 0 Unchecked, 3822.15ms Time] [2021-11-05 12:57:32,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-05 12:57:32,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 237. [2021-11-05 12:57:32,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 235 states have (on average 1.3659574468085107) internal successors, (321), 236 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:57:32,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 321 transitions. [2021-11-05 12:57:32,355 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 321 transitions. Word has length 54 [2021-11-05 12:57:32,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 12:57:32,355 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 321 transitions. [2021-11-05 12:57:32,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:57:32,355 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 321 transitions. [2021-11-05 12:57:32,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-05 12:57:32,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 12:57:32,357 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 12:57:32,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-05 12:57:32,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-05 12:57:32,564 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 12:57:32,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 12:57:32,564 INFO L85 PathProgramCache]: Analyzing trace with hash -862761671, now seen corresponding path program 1 times [2021-11-05 12:57:32,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 12:57:32,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19920321] [2021-11-05 12:57:32,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 12:57:32,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 12:57:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 12:57:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 12:57:34,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 12:57:34,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19920321] [2021-11-05 12:57:34,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19920321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 12:57:34,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 12:57:34,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-05 12:57:34,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037383835] [2021-11-05 12:57:34,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 12:57:34,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-05 12:57:34,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 12:57:34,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-05 12:57:34,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-05 12:57:34,021 INFO L87 Difference]: Start difference. First operand 237 states and 321 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 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) [2021-11-05 12:57:36,083 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:57:38,217 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:57:40,305 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:57:42,411 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:57:44,533 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:57:46,664 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:57:48,740 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:57:50,828 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:57:54,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 12:57:54,602 INFO L93 Difference]: Finished difference Result 388 states and 512 transitions. [2021-11-05 12:57:54,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-05 12:57:54,603 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 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 55 [2021-11-05 12:57:54,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 12:57:54,605 INFO L225 Difference]: With dead ends: 388 [2021-11-05 12:57:54,605 INFO L226 Difference]: Without dead ends: 360 [2021-11-05 12:57:54,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1981.93ms TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2021-11-05 12:57:54,606 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 1336 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 35 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18221.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1336 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.41ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19210.42ms IncrementalHoareTripleChecker+Time [2021-11-05 12:57:54,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1336 Valid, 1240 Invalid, 822 Unknown, 0 Unchecked, 9.41ms Time], IncrementalHoareTripleChecker [35 Valid, 779 Invalid, 8 Unknown, 0 Unchecked, 19210.42ms Time] [2021-11-05 12:57:54,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-05 12:57:54,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 299. [2021-11-05 12:57:54,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 297 states have (on average 1.34006734006734) internal successors, (398), 298 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:57:54,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 398 transitions. [2021-11-05 12:57:54,619 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 398 transitions. Word has length 55 [2021-11-05 12:57:54,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 12:57:54,620 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 398 transitions. [2021-11-05 12:57:54,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 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) [2021-11-05 12:57:54,620 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 398 transitions. [2021-11-05 12:57:54,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-05 12:57:54,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 12:57:54,621 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 12:57:54,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-05 12:57:54,622 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 12:57:54,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 12:57:54,622 INFO L85 PathProgramCache]: Analyzing trace with hash -2055166663, now seen corresponding path program 1 times [2021-11-05 12:57:54,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 12:57:54,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930852557] [2021-11-05 12:57:54,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 12:57:54,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 12:57:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 12:57:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 12:57:55,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 12:57:55,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930852557] [2021-11-05 12:57:55,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930852557] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 12:57:55,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 12:57:55,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-05 12:57:55,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058662215] [2021-11-05 12:57:55,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 12:57:55,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-05 12:57:55,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 12:57:55,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-05 12:57:55,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-05 12:57:55,265 INFO L87 Difference]: Start difference. First operand 299 states and 398 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) [2021-11-05 12:57:57,332 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:57:59,429 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:58:01,539 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:58:03,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 12:58:03,917 INFO L93 Difference]: Finished difference Result 561 states and 740 transitions. [2021-11-05 12:58:03,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-05 12:58:03,918 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 55 [2021-11-05 12:58:03,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 12:58:03,920 INFO L225 Difference]: With dead ends: 561 [2021-11-05 12:58:03,920 INFO L226 Difference]: Without dead ends: 523 [2021-11-05 12:58:03,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 721.89ms TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-05 12:58:03,921 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 360 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 53 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7745.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.29ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8153.53ms IncrementalHoareTripleChecker+Time [2021-11-05 12:58:03,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 1254 Invalid, 727 Unknown, 0 Unchecked, 7.29ms Time], IncrementalHoareTripleChecker [53 Valid, 671 Invalid, 3 Unknown, 0 Unchecked, 8153.53ms Time] [2021-11-05 12:58:03,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-05 12:58:03,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 321. [2021-11-05 12:58:03,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 319 states have (on average 1.3322884012539185) internal successors, (425), 320 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:58:03,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 425 transitions. [2021-11-05 12:58:03,934 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 425 transitions. Word has length 55 [2021-11-05 12:58:03,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 12:58:03,935 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 425 transitions. [2021-11-05 12:58:03,935 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) [2021-11-05 12:58:03,935 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 425 transitions. [2021-11-05 12:58:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-05 12:58:03,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 12:58:03,936 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 12:58:03,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-05 12:58:03,937 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 12:58:03,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 12:58:03,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1631519941, now seen corresponding path program 1 times [2021-11-05 12:58:03,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 12:58:03,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679786969] [2021-11-05 12:58:03,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 12:58:03,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 12:58:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 12:58:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 12:58:04,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 12:58:04,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679786969] [2021-11-05 12:58:04,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679786969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 12:58:04,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 12:58:04,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-05 12:58:04,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105133499] [2021-11-05 12:58:04,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 12:58:04,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-05 12:58:04,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 12:58:04,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-05 12:58:04,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-05 12:58:04,386 INFO L87 Difference]: Start difference. First operand 321 states and 425 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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) [2021-11-05 12:58:06,453 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:58:08,569 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:58:10,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 12:58:10,165 INFO L93 Difference]: Finished difference Result 528 states and 708 transitions. [2021-11-05 12:58:10,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-05 12:58:10,166 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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 55 [2021-11-05 12:58:10,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 12:58:10,168 INFO L225 Difference]: With dead ends: 528 [2021-11-05 12:58:10,168 INFO L226 Difference]: Without dead ends: 490 [2021-11-05 12:58:10,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 338.84ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-05 12:58:10,169 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 273 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 39 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5245.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.36ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5545.88ms IncrementalHoareTripleChecker+Time [2021-11-05 12:58:10,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 1114 Invalid, 528 Unknown, 0 Unchecked, 5.36ms Time], IncrementalHoareTripleChecker [39 Valid, 487 Invalid, 2 Unknown, 0 Unchecked, 5545.88ms Time] [2021-11-05 12:58:10,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-05 12:58:10,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 321. [2021-11-05 12:58:10,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 319 states have (on average 1.3322884012539185) internal successors, (425), 320 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:58:10,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 425 transitions. [2021-11-05 12:58:10,182 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 425 transitions. Word has length 55 [2021-11-05 12:58:10,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 12:58:10,182 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 425 transitions. [2021-11-05 12:58:10,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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) [2021-11-05 12:58:10,183 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 425 transitions. [2021-11-05 12:58:10,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-05 12:58:10,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 12:58:10,184 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 12:58:10,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-05 12:58:10,184 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 12:58:10,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 12:58:10,184 INFO L85 PathProgramCache]: Analyzing trace with hash -2140993031, now seen corresponding path program 1 times [2021-11-05 12:58:10,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 12:58:10,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323878947] [2021-11-05 12:58:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 12:58:10,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 12:58:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 12:58:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 12:58:12,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 12:58:12,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323878947] [2021-11-05 12:58:12,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323878947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 12:58:12,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 12:58:12,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-05 12:58:12,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342538410] [2021-11-05 12:58:12,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 12:58:12,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-05 12:58:12,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 12:58:12,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-05 12:58:12,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-05 12:58:12,810 INFO L87 Difference]: Start difference. First operand 321 states and 425 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) [2021-11-05 12:58:14,862 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:58:16,965 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:58:19,067 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:58:21,179 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:58:22,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 12:58:22,088 INFO L93 Difference]: Finished difference Result 632 states and 839 transitions. [2021-11-05 12:58:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-05 12:58:22,089 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 55 [2021-11-05 12:58:22,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 12:58:22,090 INFO L225 Difference]: With dead ends: 632 [2021-11-05 12:58:22,090 INFO L226 Difference]: Without dead ends: 406 [2021-11-05 12:58:22,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 459.80ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-05 12:58:22,091 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 684 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 17 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8564.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.82ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9019.17ms IncrementalHoareTripleChecker+Time [2021-11-05 12:58:22,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 1007 Invalid, 201 Unknown, 0 Unchecked, 3.82ms Time], IncrementalHoareTripleChecker [17 Valid, 180 Invalid, 4 Unknown, 0 Unchecked, 9019.17ms Time] [2021-11-05 12:58:22,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-11-05 12:58:22,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 325. [2021-11-05 12:58:22,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 323 states have (on average 1.328173374613003) internal successors, (429), 324 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:58:22,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 429 transitions. [2021-11-05 12:58:22,108 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 429 transitions. Word has length 55 [2021-11-05 12:58:22,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 12:58:22,108 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 429 transitions. [2021-11-05 12:58:22,108 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) [2021-11-05 12:58:22,108 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 429 transitions. [2021-11-05 12:58:22,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-05 12:58:22,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 12:58:22,113 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 12:58:22,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-05 12:58:22,113 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 12:58:22,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 12:58:22,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1273154468, now seen corresponding path program 1 times [2021-11-05 12:58:22,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 12:58:22,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725605872] [2021-11-05 12:58:22,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 12:58:22,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 12:58:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 12:58:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 12:58:25,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 12:58:25,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725605872] [2021-11-05 12:58:25,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725605872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 12:58:25,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 12:58:25,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-05 12:58:25,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466969453] [2021-11-05 12:58:25,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 12:58:25,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-05 12:58:25,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 12:58:25,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-05 12:58:25,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-11-05 12:58:25,970 INFO L87 Difference]: Start difference. First operand 325 states and 429 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:58:28,023 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:58:30,125 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:58:32,227 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:58:34,298 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:58:36,467 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:58:38,569 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:58:40,688 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:58:42,767 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:58:44,877 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:58:46,997 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:58:49,088 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:58:51,192 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:58:59,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 12:58:59,022 INFO L93 Difference]: Finished difference Result 587 states and 755 transitions. [2021-11-05 12:58:59,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-05 12:58:59,022 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 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 [2021-11-05 12:58:59,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 12:58:59,024 INFO L225 Difference]: With dead ends: 587 [2021-11-05 12:58:59,024 INFO L226 Difference]: Without dead ends: 564 [2021-11-05 12:58:59,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 4217.34ms TimeCoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2021-11-05 12:58:59,026 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 1297 mSDsluCounter, 2170 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 122 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28360.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1297 SdHoareTripleChecker+Valid, 2378 SdHoareTripleChecker+Invalid, 1734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.33ms SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29822.89ms IncrementalHoareTripleChecker+Time [2021-11-05 12:58:59,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1297 Valid, 2378 Invalid, 1734 Unknown, 0 Unchecked, 18.33ms Time], IncrementalHoareTripleChecker [122 Valid, 1600 Invalid, 12 Unknown, 0 Unchecked, 29822.89ms Time] [2021-11-05 12:58:59,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-11-05 12:58:59,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 334. [2021-11-05 12:58:59,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 332 states have (on average 1.3253012048192772) internal successors, (440), 333 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:58:59,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 440 transitions. [2021-11-05 12:58:59,044 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 440 transitions. Word has length 58 [2021-11-05 12:58:59,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 12:58:59,044 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 440 transitions. [2021-11-05 12:58:59,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:58:59,044 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 440 transitions. [2021-11-05 12:58:59,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-05 12:58:59,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 12:58:59,045 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 12:58:59,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-05 12:58:59,046 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 12:58:59,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 12:58:59,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1953212838, now seen corresponding path program 1 times [2021-11-05 12:58:59,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 12:58:59,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54584332] [2021-11-05 12:58:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 12:58:59,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 12:58:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 12:59:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 12:59:00,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 12:59:00,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54584332] [2021-11-05 12:59:00,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54584332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 12:59:00,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 12:59:00,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-05 12:59:00,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680354236] [2021-11-05 12:59:00,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 12:59:00,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-05 12:59:00,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 12:59:00,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-05 12:59:00,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-05 12:59:00,959 INFO L87 Difference]: Start difference. First operand 334 states and 440 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:59:03,015 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:59:05,120 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:59:07,221 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:59:09,318 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:59:11,440 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:59:13,543 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:59:20,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 12:59:20,298 INFO L93 Difference]: Finished difference Result 586 states and 755 transitions. [2021-11-05 12:59:20,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-05 12:59:20,299 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 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 [2021-11-05 12:59:20,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 12:59:20,301 INFO L225 Difference]: With dead ends: 586 [2021-11-05 12:59:20,301 INFO L226 Difference]: Without dead ends: 559 [2021-11-05 12:59:20,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 4169.86ms TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2021-11-05 12:59:20,302 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 1465 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 50 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15289.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1465 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.39ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16103.91ms IncrementalHoareTripleChecker+Time [2021-11-05 12:59:20,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1465 Valid, 1053 Invalid, 1359 Unknown, 0 Unchecked, 13.39ms Time], IncrementalHoareTripleChecker [50 Valid, 1303 Invalid, 6 Unknown, 0 Unchecked, 16103.91ms Time] [2021-11-05 12:59:20,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-05 12:59:20,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 341. [2021-11-05 12:59:20,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 339 states have (on average 1.3215339233038348) internal successors, (448), 340 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:59:20,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 448 transitions. [2021-11-05 12:59:20,321 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 448 transitions. Word has length 58 [2021-11-05 12:59:20,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 12:59:20,321 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 448 transitions. [2021-11-05 12:59:20,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:59:20,321 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 448 transitions. [2021-11-05 12:59:20,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-05 12:59:20,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 12:59:20,322 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 12:59:20,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-05 12:59:20,323 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 12:59:20,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 12:59:20,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1577744605, now seen corresponding path program 1 times [2021-11-05 12:59:20,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 12:59:20,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169678160] [2021-11-05 12:59:20,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 12:59:20,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 12:59:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 12:59:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 12:59:22,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 12:59:22,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169678160] [2021-11-05 12:59:22,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169678160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 12:59:22,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 12:59:22,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-05 12:59:22,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554143665] [2021-11-05 12:59:22,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 12:59:22,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-05 12:59:22,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 12:59:22,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-05 12:59:22,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-05 12:59:22,005 INFO L87 Difference]: Start difference. First operand 341 states and 448 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:59:24,057 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:59:26,168 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:59:28,267 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:59:30,379 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:59:32,476 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:59:34,576 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:59:36,664 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:59:38,748 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:59:40,848 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 12:59:49,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 12:59:49,218 INFO L93 Difference]: Finished difference Result 593 states and 763 transitions. [2021-11-05 12:59:49,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-05 12:59:49,219 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-11-05 12:59:49,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 12:59:49,221 INFO L225 Difference]: With dead ends: 593 [2021-11-05 12:59:49,221 INFO L226 Difference]: Without dead ends: 566 [2021-11-05 12:59:49,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 4605.80ms TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2021-11-05 12:59:49,222 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 1704 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 1379 mSolverCounterSat, 56 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22214.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.50ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1379 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23384.49ms IncrementalHoareTripleChecker+Time [2021-11-05 12:59:49,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1704 Valid, 1233 Invalid, 1444 Unknown, 0 Unchecked, 18.50ms Time], IncrementalHoareTripleChecker [56 Valid, 1379 Invalid, 9 Unknown, 0 Unchecked, 23384.49ms Time] [2021-11-05 12:59:49,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-05 12:59:49,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 341. [2021-11-05 12:59:49,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 339 states have (on average 1.3215339233038348) internal successors, (448), 340 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:59:49,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 448 transitions. [2021-11-05 12:59:49,241 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 448 transitions. Word has length 59 [2021-11-05 12:59:49,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 12:59:49,242 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 448 transitions. [2021-11-05 12:59:49,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:59:49,242 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 448 transitions. [2021-11-05 12:59:49,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-05 12:59:49,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 12:59:49,243 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 12:59:49,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-05 12:59:49,244 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 12:59:49,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 12:59:49,244 INFO L85 PathProgramCache]: Analyzing trace with hash 977299011, now seen corresponding path program 1 times [2021-11-05 12:59:49,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 12:59:49,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889421124] [2021-11-05 12:59:49,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 12:59:49,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 12:59:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 12:59:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 12:59:53,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 12:59:53,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889421124] [2021-11-05 12:59:53,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889421124] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 12:59:53,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397367569] [2021-11-05 12:59:53,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 12:59:53,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 12:59:53,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 12:59:53,346 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 12:59:53,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-05 12:59:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 12:59:54,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 2921 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-05 12:59:54,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 12:59:54,212 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 [2021-11-05 12:59:54,427 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-05 12:59:54,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-05 12:59:54,735 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 23 treesize of output 19 [2021-11-05 12:59:55,804 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-05 12:59:55,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 48 [2021-11-05 12:59:55,897 INFO L354 Elim1Store]: treesize reduction 36, result has 41.0 percent of original size [2021-11-05 12:59:55,897 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 41 treesize of output 53 [2021-11-05 12:59:56,423 INFO L354 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2021-11-05 12:59:56,423 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 2 case distinctions, treesize of input 52 treesize of output 35 [2021-11-05 12:59:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-05 12:59:56,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 12:59:56,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397367569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 12:59:56,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-05 12:59:56,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [18] total 23 [2021-11-05 12:59:56,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073662203] [2021-11-05 12:59:56,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 12:59:56,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-05 12:59:56,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 12:59:56,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-05 12:59:56,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-11-05 12:59:56,640 INFO L87 Difference]: Start difference. First operand 341 states and 448 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 12:59:58,697 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:00:00,812 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:00:02,924 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:00:04,987 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:00:07,081 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:00:09,210 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:00:11,286 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:00:13,398 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:00:16,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:00:16,092 INFO L93 Difference]: Finished difference Result 501 states and 636 transitions. [2021-11-05 13:00:16,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-05 13:00:16,092 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-11-05 13:00:16,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:00:16,094 INFO L225 Difference]: With dead ends: 501 [2021-11-05 13:00:16,094 INFO L226 Difference]: Without dead ends: 478 [2021-11-05 13:00:16,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 3367.16ms TimeCoverageRelationStatistics Valid=232, Invalid=1250, Unknown=0, NotChecked=0, Total=1482 [2021-11-05 13:00:16,095 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 936 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 24 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17096.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 2051 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.01ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17950.71ms IncrementalHoareTripleChecker+Time [2021-11-05 13:00:16,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [936 Valid, 2051 Invalid, 457 Unknown, 0 Unchecked, 6.01ms Time], IncrementalHoareTripleChecker [24 Valid, 425 Invalid, 8 Unknown, 0 Unchecked, 17950.71ms Time] [2021-11-05 13:00:16,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-11-05 13:00:16,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 334. [2021-11-05 13:00:16,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 332 states have (on average 1.322289156626506) internal successors, (439), 333 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:00:16,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 439 transitions. [2021-11-05 13:00:16,115 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 439 transitions. Word has length 59 [2021-11-05 13:00:16,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:00:16,115 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 439 transitions. [2021-11-05 13:00:16,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:00:16,115 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 439 transitions. [2021-11-05 13:00:16,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-05 13:00:16,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:00:16,116 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:00:16,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-05 13:00:16,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:00:16,343 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 13:00:16,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:00:16,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1657357381, now seen corresponding path program 1 times [2021-11-05 13:00:16,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:00:16,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843369229] [2021-11-05 13:00:16,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:00:16,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:00:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:00:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:00:18,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:00:18,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843369229] [2021-11-05 13:00:18,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843369229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:00:18,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013166426] [2021-11-05 13:00:18,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:00:18,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:00:18,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:00:18,333 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 13:00:18,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-05 13:00:18,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:00:19,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 2916 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-05 13:00:19,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:00:19,303 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 35 treesize of output 23 [2021-11-05 13:00:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-05 13:00:19,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 13:00:19,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013166426] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:00:19,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-05 13:00:19,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 19 [2021-11-05 13:00:19,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623345005] [2021-11-05 13:00:19,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:00:19,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 13:00:19,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:00:19,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 13:00:19,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-11-05 13:00:19,398 INFO L87 Difference]: Start difference. First operand 334 states and 439 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:00:21,458 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:00:22,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:00:22,154 INFO L93 Difference]: Finished difference Result 566 states and 753 transitions. [2021-11-05 13:00:22,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 13:00:22,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-11-05 13:00:22,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:00:22,156 INFO L225 Difference]: With dead ends: 566 [2021-11-05 13:00:22,156 INFO L226 Difference]: Without dead ends: 332 [2021-11-05 13:00:22,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1363.23ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-11-05 13:00:22,157 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 31 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2457.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.24ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2614.26ms IncrementalHoareTripleChecker+Time [2021-11-05 13:00:22,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 427 Invalid, 125 Unknown, 0 Unchecked, 2.24ms Time], IncrementalHoareTripleChecker [13 Valid, 111 Invalid, 1 Unknown, 0 Unchecked, 2614.26ms Time] [2021-11-05 13:00:22,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-05 13:00:22,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 325. [2021-11-05 13:00:22,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 323 states have (on average 1.3095975232198143) internal successors, (423), 324 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:00:22,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 423 transitions. [2021-11-05 13:00:22,176 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 423 transitions. Word has length 59 [2021-11-05 13:00:22,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:00:22,176 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 423 transitions. [2021-11-05 13:00:22,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:00:22,177 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 423 transitions. [2021-11-05 13:00:22,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-05 13:00:22,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:00:22,178 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:00:22,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-05 13:00:22,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:00:22,392 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 13:00:22,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:00:22,392 INFO L85 PathProgramCache]: Analyzing trace with hash 552863007, now seen corresponding path program 1 times [2021-11-05 13:00:22,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:00:22,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658349913] [2021-11-05 13:00:22,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:00:22,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:00:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:00:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:00:22,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:00:22,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658349913] [2021-11-05 13:00:22,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658349913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:00:22,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:00:22,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-05 13:00:22,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634924498] [2021-11-05 13:00:22,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:00:22,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-05 13:00:22,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:00:22,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-05 13:00:22,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-05 13:00:22,958 INFO L87 Difference]: Start difference. First operand 325 states and 423 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:00:23,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:00:23,963 INFO L93 Difference]: Finished difference Result 454 states and 589 transitions. [2021-11-05 13:00:23,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-05 13:00:23,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 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 [2021-11-05 13:00:23,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:00:23,965 INFO L225 Difference]: With dead ends: 454 [2021-11-05 13:00:23,965 INFO L226 Difference]: Without dead ends: 439 [2021-11-05 13:00:23,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 560.36ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-05 13:00:23,966 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 196 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 574.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.99ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 617.25ms IncrementalHoareTripleChecker+Time [2021-11-05 13:00:23,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 1130 Invalid, 269 Unknown, 0 Unchecked, 2.99ms Time], IncrementalHoareTripleChecker [63 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 617.25ms Time] [2021-11-05 13:00:23,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-11-05 13:00:23,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 327. [2021-11-05 13:00:23,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 325 states have (on average 1.3046153846153845) internal successors, (424), 326 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:00:23,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 424 transitions. [2021-11-05 13:00:23,982 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 424 transitions. Word has length 60 [2021-11-05 13:00:23,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:00:23,983 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 424 transitions. [2021-11-05 13:00:23,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:00:23,983 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 424 transitions. [2021-11-05 13:00:23,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-05 13:00:23,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:00:23,984 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:00:23,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-05 13:00:23,984 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 13:00:23,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:00:23,985 INFO L85 PathProgramCache]: Analyzing trace with hash -256483619, now seen corresponding path program 1 times [2021-11-05 13:00:23,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:00:23,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217517037] [2021-11-05 13:00:23,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:00:23,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:00:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:00:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:00:24,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:00:24,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217517037] [2021-11-05 13:00:24,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217517037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:00:24,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:00:24,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-05 13:00:24,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851230707] [2021-11-05 13:00:24,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:00:24,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-05 13:00:24,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:00:24,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-05 13:00:24,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-05 13:00:24,722 INFO L87 Difference]: Start difference. First operand 327 states and 424 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:00:26,776 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:00:28,886 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:00:30,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:00:30,504 INFO L93 Difference]: Finished difference Result 340 states and 436 transitions. [2021-11-05 13:00:30,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-05 13:00:30,505 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 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 [2021-11-05 13:00:30,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:00:30,506 INFO L225 Difference]: With dead ends: 340 [2021-11-05 13:00:30,506 INFO L226 Difference]: Without dead ends: 329 [2021-11-05 13:00:30,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1143.34ms TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2021-11-05 13:00:30,506 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 253 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 99 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4748.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.47ms SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4983.46ms IncrementalHoareTripleChecker+Time [2021-11-05 13:00:30,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 1204 Invalid, 438 Unknown, 0 Unchecked, 3.47ms Time], IncrementalHoareTripleChecker [99 Valid, 337 Invalid, 2 Unknown, 0 Unchecked, 4983.46ms Time] [2021-11-05 13:00:30,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-05 13:00:30,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 317. [2021-11-05 13:00:30,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.3069620253164558) internal successors, (413), 316 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:00:30,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 413 transitions. [2021-11-05 13:00:30,535 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 413 transitions. Word has length 60 [2021-11-05 13:00:30,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:00:30,535 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 413 transitions. [2021-11-05 13:00:30,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:00:30,536 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 413 transitions. [2021-11-05 13:00:30,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-05 13:00:30,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:00:30,537 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:00:30,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-05 13:00:30,537 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 13:00:30,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:00:30,537 INFO L85 PathProgramCache]: Analyzing trace with hash -452802390, now seen corresponding path program 1 times [2021-11-05 13:00:30,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:00:30,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106459359] [2021-11-05 13:00:30,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:00:30,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:00:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:00:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:00:31,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:00:31,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106459359] [2021-11-05 13:00:31,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106459359] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:00:31,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:00:31,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-05 13:00:31,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148864408] [2021-11-05 13:00:31,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:00:31,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-05 13:00:31,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:00:31,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-05 13:00:31,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-05 13:00:31,458 INFO L87 Difference]: Start difference. First operand 317 states and 413 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:00:33,511 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:00:35,628 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:00:37,743 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:00:39,820 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:00:41,968 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:00:44,075 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:00:48,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:00:48,254 INFO L93 Difference]: Finished difference Result 471 states and 608 transitions. [2021-11-05 13:00:48,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-05 13:00:48,255 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 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 [2021-11-05 13:00:48,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:00:48,256 INFO L225 Difference]: With dead ends: 471 [2021-11-05 13:00:48,256 INFO L226 Difference]: Without dead ends: 449 [2021-11-05 13:00:48,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1730.86ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-11-05 13:00:48,257 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 692 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 62 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14592.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.98ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15413.55ms IncrementalHoareTripleChecker+Time [2021-11-05 13:00:48,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 996 Invalid, 1155 Unknown, 0 Unchecked, 8.98ms Time], IncrementalHoareTripleChecker [62 Valid, 1087 Invalid, 6 Unknown, 0 Unchecked, 15413.55ms Time] [2021-11-05 13:00:48,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-11-05 13:00:48,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 317. [2021-11-05 13:00:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.3006329113924051) internal successors, (411), 316 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) [2021-11-05 13:00:48,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 411 transitions. [2021-11-05 13:00:48,275 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 411 transitions. Word has length 61 [2021-11-05 13:00:48,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:00:48,275 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 411 transitions. [2021-11-05 13:00:48,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:00:48,276 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 411 transitions. [2021-11-05 13:00:48,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-05 13:00:48,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:00:48,276 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:00:48,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-05 13:00:48,277 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 13:00:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:00:48,277 INFO L85 PathProgramCache]: Analyzing trace with hash 599475833, now seen corresponding path program 1 times [2021-11-05 13:00:48,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:00:48,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096673146] [2021-11-05 13:00:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:00:48,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:00:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:00:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:00:48,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:00:48,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096673146] [2021-11-05 13:00:48,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096673146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:00:48,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:00:48,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-05 13:00:48,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849511812] [2021-11-05 13:00:48,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:00:48,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-05 13:00:48,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:00:48,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-05 13:00:48,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-05 13:00:48,881 INFO L87 Difference]: Start difference. First operand 317 states and 411 transitions. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 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) [2021-11-05 13:00:50,952 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:00:53,049 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:00:54,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:00:54,425 INFO L93 Difference]: Finished difference Result 335 states and 428 transitions. [2021-11-05 13:00:54,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-05 13:00:54,426 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 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 63 [2021-11-05 13:00:54,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:00:54,427 INFO L225 Difference]: With dead ends: 335 [2021-11-05 13:00:54,427 INFO L226 Difference]: Without dead ends: 228 [2021-11-05 13:00:54,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 839.29ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-11-05 13:00:54,428 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 544 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 33 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4644.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.18ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4913.59ms IncrementalHoareTripleChecker+Time [2021-11-05 13:00:54,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 582 Invalid, 271 Unknown, 0 Unchecked, 3.18ms Time], IncrementalHoareTripleChecker [33 Valid, 236 Invalid, 2 Unknown, 0 Unchecked, 4913.59ms Time] [2021-11-05 13:00:54,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-05 13:00:54,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2021-11-05 13:00:54,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.3259911894273129) internal successors, (301), 227 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:00:54,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 301 transitions. [2021-11-05 13:00:54,440 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 301 transitions. Word has length 63 [2021-11-05 13:00:54,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:00:54,440 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 301 transitions. [2021-11-05 13:00:54,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 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) [2021-11-05 13:00:54,441 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 301 transitions. [2021-11-05 13:00:54,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-05 13:00:54,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:00:54,442 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:00:54,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-05 13:00:54,442 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 13:00:54,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:00:54,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1796406615, now seen corresponding path program 1 times [2021-11-05 13:00:54,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:00:54,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426135658] [2021-11-05 13:00:54,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:00:54,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:00:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:00:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:00:56,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:00:56,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426135658] [2021-11-05 13:00:56,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426135658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:00:56,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:00:56,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-05 13:00:56,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660558924] [2021-11-05 13:00:56,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:00:56,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-05 13:00:56,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:00:56,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-05 13:00:56,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-05 13:00:56,089 INFO L87 Difference]: Start difference. First operand 228 states and 301 transitions. Second operand has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:00:58,159 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:01:00,236 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:01:02,344 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:01:04,424 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:01:06,537 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:01:08,631 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:01:10,714 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:01:12,789 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:01:17,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:01:17,410 INFO L93 Difference]: Finished difference Result 351 states and 454 transitions. [2021-11-05 13:01:17,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-05 13:01:17,411 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-05 13:01:17,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:01:17,412 INFO L225 Difference]: With dead ends: 351 [2021-11-05 13:01:17,412 INFO L226 Difference]: Without dead ends: 331 [2021-11-05 13:01:17,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 3223.54ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-11-05 13:01:17,413 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1614 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 61 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18072.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1614 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.89ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18948.51ms IncrementalHoareTripleChecker+Time [2021-11-05 13:01:17,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1614 Valid, 559 Invalid, 920 Unknown, 0 Unchecked, 7.89ms Time], IncrementalHoareTripleChecker [61 Valid, 851 Invalid, 8 Unknown, 0 Unchecked, 18948.51ms Time] [2021-11-05 13:01:17,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-05 13:01:17,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 238. [2021-11-05 13:01:17,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.3122362869198312) internal successors, (311), 237 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:01:17,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 311 transitions. [2021-11-05 13:01:17,428 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 311 transitions. Word has length 72 [2021-11-05 13:01:17,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:01:17,429 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 311 transitions. [2021-11-05 13:01:17,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:01:17,429 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 311 transitions. [2021-11-05 13:01:17,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-05 13:01:17,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:01:17,430 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:01:17,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-05 13:01:17,430 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 13:01:17,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:01:17,431 INFO L85 PathProgramCache]: Analyzing trace with hash 978758165, now seen corresponding path program 1 times [2021-11-05 13:01:17,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:01:17,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317337323] [2021-11-05 13:01:17,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:01:17,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:01:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:01:21,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:01:21,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:01:21,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317337323] [2021-11-05 13:01:21,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317337323] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:01:21,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:01:21,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-05 13:01:21,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519669012] [2021-11-05 13:01:21,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:01:21,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-05 13:01:21,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:01:21,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-05 13:01:21,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-11-05 13:01:21,767 INFO L87 Difference]: Start difference. First operand 238 states and 311 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:01:23,820 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:01:25,938 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:01:28,039 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:01:30,157 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:01:32,261 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:01:34,358 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:01:36,492 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:01:38,617 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:01:40,702 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:01:42,824 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:01:44,953 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:01:47,072 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:01:49,185 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:01:55,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:01:55,917 INFO L93 Difference]: Finished difference Result 353 states and 456 transitions. [2021-11-05 13:01:55,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-05 13:01:55,918 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-05 13:01:55,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:01:55,919 INFO L225 Difference]: With dead ends: 353 [2021-11-05 13:01:55,919 INFO L226 Difference]: Without dead ends: 313 [2021-11-05 13:01:55,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 4225.11ms TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-11-05 13:01:55,920 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 1518 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 193 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29238.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1518 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.42ms SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30882.18ms IncrementalHoareTripleChecker+Time [2021-11-05 13:01:55,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1518 Valid, 916 Invalid, 1697 Unknown, 0 Unchecked, 10.42ms Time], IncrementalHoareTripleChecker [193 Valid, 1491 Invalid, 13 Unknown, 0 Unchecked, 30882.18ms Time] [2021-11-05 13:01:55,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-05 13:01:55,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 215. [2021-11-05 13:01:55,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.2897196261682242) internal successors, (276), 214 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:01:55,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 276 transitions. [2021-11-05 13:01:55,932 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 276 transitions. Word has length 72 [2021-11-05 13:01:55,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:01:55,932 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 276 transitions. [2021-11-05 13:01:55,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:01:55,933 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 276 transitions. [2021-11-05 13:01:55,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-05 13:01:55,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:01:55,934 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:01:55,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-05 13:01:55,934 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 13:01:55,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:01:55,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1071781302, now seen corresponding path program 1 times [2021-11-05 13:01:55,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:01:55,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677573726] [2021-11-05 13:01:55,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:01:55,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:01:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:01:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:01:57,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:01:57,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677573726] [2021-11-05 13:01:57,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677573726] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:01:57,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723736401] [2021-11-05 13:01:57,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:01:57,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:01:57,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:01:57,758 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 13:01:57,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-05 13:01:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:01:58,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 2965 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-05 13:01:58,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:01:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-05 13:01:58,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 13:01:58,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723736401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:01:58,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-05 13:01:58,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18] total 21 [2021-11-05 13:01:58,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039853328] [2021-11-05 13:01:58,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:01:58,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-05 13:01:58,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:01:58,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-05 13:01:58,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-11-05 13:01:58,812 INFO L87 Difference]: Start difference. First operand 215 states and 276 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:02:00,865 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:02:02,983 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:02:03,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:02:03,688 INFO L93 Difference]: Finished difference Result 353 states and 452 transitions. [2021-11-05 13:02:03,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-05 13:02:03,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-05 13:02:03,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:02:03,690 INFO L225 Difference]: With dead ends: 353 [2021-11-05 13:02:03,690 INFO L226 Difference]: Without dead ends: 193 [2021-11-05 13:02:03,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1344.51ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-11-05 13:02:03,691 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 56 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4427.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.26ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4693.39ms IncrementalHoareTripleChecker+Time [2021-11-05 13:02:03,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 509 Invalid, 176 Unknown, 0 Unchecked, 1.26ms Time], IncrementalHoareTripleChecker [16 Valid, 158 Invalid, 2 Unknown, 0 Unchecked, 4693.39ms Time] [2021-11-05 13:02:03,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-05 13:02:03,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2021-11-05 13:02:03,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.2864583333333333) internal successors, (247), 192 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:02:03,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 247 transitions. [2021-11-05 13:02:03,699 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 247 transitions. Word has length 73 [2021-11-05 13:02:03,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:02:03,700 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 247 transitions. [2021-11-05 13:02:03,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:02:03,700 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 247 transitions. [2021-11-05 13:02:03,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-05 13:02:03,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:02:03,701 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:02:03,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-05 13:02:03,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-05 13:02:03,918 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 13:02:03,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:02:03,918 INFO L85 PathProgramCache]: Analyzing trace with hash 254132852, now seen corresponding path program 1 times [2021-11-05 13:02:03,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:02:03,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758671334] [2021-11-05 13:02:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:02:03,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:02:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:02:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:02:08,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:02:08,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758671334] [2021-11-05 13:02:08,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758671334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:02:08,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226806318] [2021-11-05 13:02:08,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:02:08,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:02:08,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:02:08,042 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 13:02:08,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-05 13:02:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:02:08,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 2970 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-05 13:02:08,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:02:08,767 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 [2021-11-05 13:02:08,978 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-05 13:02:08,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2021-11-05 13:02:09,265 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 27 treesize of output 23 [2021-11-05 13:02:09,285 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 [2021-11-05 13:02:10,900 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-05 13:02:10,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 87 [2021-11-05 13:02:10,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-05 13:02:10,936 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-05 13:02:10,937 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 58 [2021-11-05 13:02:10,981 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-11-05 13:02:10,981 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 75 treesize of output 77 [2021-11-05 13:02:11,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-05 13:02:11,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-05 13:02:11,054 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 15 treesize of output 15 [2021-11-05 13:02:12,795 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-05 13:02:12,795 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 129 treesize of output 102 [2021-11-05 13:02:12,923 INFO L354 Elim1Store]: treesize reduction 66, result has 29.0 percent of original size [2021-11-05 13:02:12,923 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 114 treesize of output 97 [2021-11-05 13:02:13,108 INFO L354 Elim1Store]: treesize reduction 82, result has 29.9 percent of original size [2021-11-05 13:02:13,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 101 [2021-11-05 13:02:16,677 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 63 treesize of output 55 [2021-11-05 13:02:16,684 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-05 13:02:16,684 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 55 treesize of output 35 [2021-11-05 13:02:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:02:16,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:02:20,967 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-05 13:02:20,967 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 338 treesize of output 337 [2021-11-05 13:02:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:02:55,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226806318] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 13:02:55,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 13:02:55,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 15] total 49 [2021-11-05 13:02:55,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592658762] [2021-11-05 13:02:55,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 13:02:55,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-05 13:02:55,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:02:55,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-05 13:02:55,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2068, Unknown=0, NotChecked=0, Total=2352 [2021-11-05 13:02:55,826 INFO L87 Difference]: Start difference. First operand 193 states and 247 transitions. Second operand has 49 states, 49 states have (on average 4.0) internal successors, (196), 49 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:02:57,878 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:02:59,992 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:03:02,062 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:03:04,194 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:03:06,318 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:03:08,431 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:03:10,564 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:03:12,680 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:03:23,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:03:23,209 INFO L93 Difference]: Finished difference Result 262 states and 327 transitions. [2021-11-05 13:03:23,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-05 13:03:23,210 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.0) internal successors, (196), 49 states have internal predecessors, (196), 0 states have call successors, (0), 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 73 [2021-11-05 13:03:23,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:03:23,211 INFO L225 Difference]: With dead ends: 262 [2021-11-05 13:03:23,211 INFO L226 Difference]: Without dead ends: 211 [2021-11-05 13:03:23,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 16048.42ms TimeCoverageRelationStatistics Valid=750, Invalid=4505, Unknown=1, NotChecked=0, Total=5256 [2021-11-05 13:03:23,213 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 321 mSDsluCounter, 2911 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 32 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17222.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 3052 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.91ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 402 IncrementalHoareTripleChecker+Unchecked, 18200.64ms IncrementalHoareTripleChecker+Time [2021-11-05 13:03:23,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 3052 Invalid, 936 Unknown, 0 Unchecked, 9.91ms Time], IncrementalHoareTripleChecker [32 Valid, 494 Invalid, 8 Unknown, 402 Unchecked, 18200.64ms Time] [2021-11-05 13:03:23,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-05 13:03:23,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 197. [2021-11-05 13:03:23,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.2908163265306123) internal successors, (253), 196 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:03:23,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 253 transitions. [2021-11-05 13:03:23,229 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 253 transitions. Word has length 73 [2021-11-05 13:03:23,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:03:23,229 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 253 transitions. [2021-11-05 13:03:23,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.0) internal successors, (196), 49 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:03:23,229 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 253 transitions. [2021-11-05 13:03:23,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-05 13:03:23,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:03:23,230 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:03:23,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-05 13:03:23,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-05 13:03:23,447 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 13:03:23,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:03:23,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1972830349, now seen corresponding path program 1 times [2021-11-05 13:03:23,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:03:23,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425291745] [2021-11-05 13:03:23,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:03:23,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:03:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:03:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:03:27,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:03:27,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425291745] [2021-11-05 13:03:27,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425291745] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:03:27,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262985513] [2021-11-05 13:03:27,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:03:27,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:03:27,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:03:27,429 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 13:03:27,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-05 13:03:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:03:28,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 2970 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-05 13:03:28,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:03:28,156 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 [2021-11-05 13:03:28,333 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-05 13:03:28,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2021-11-05 13:03:28,607 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 27 treesize of output 23 [2021-11-05 13:03:28,635 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 [2021-11-05 13:03:30,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-05 13:03:30,175 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-05 13:03:30,176 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 69 [2021-11-05 13:03:30,209 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-05 13:03:30,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 65 [2021-11-05 13:03:30,251 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-05 13:03:30,251 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 57 treesize of output 59 [2021-11-05 13:03:30,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-05 13:03:30,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-05 13:03:30,321 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 15 treesize of output 15 [2021-11-05 13:03:32,090 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-05 13:03:32,091 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 123 treesize of output 102 [2021-11-05 13:03:32,181 INFO L354 Elim1Store]: treesize reduction 66, result has 29.0 percent of original size [2021-11-05 13:03:32,182 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 108 treesize of output 97 [2021-11-05 13:03:32,216 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-05 13:03:32,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 91 [2021-11-05 13:03:32,273 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-05 13:03:32,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 78 [2021-11-05 13:03:34,952 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 63 treesize of output 55 [2021-11-05 13:03:34,960 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-05 13:03:34,961 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 55 treesize of output 35 [2021-11-05 13:03:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:03:35,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:03:38,900 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-05 13:03:38,901 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 338 treesize of output 337 [2021-11-05 13:04:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:04:13,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262985513] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 13:04:13,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 13:04:13,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 15] total 48 [2021-11-05 13:04:13,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572872709] [2021-11-05 13:04:13,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 13:04:13,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-05 13:04:13,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:04:13,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-05 13:04:13,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1982, Unknown=0, NotChecked=0, Total=2256 [2021-11-05 13:04:13,281 INFO L87 Difference]: Start difference. First operand 197 states and 253 transitions. Second operand has 48 states, 48 states have (on average 4.145833333333333) internal successors, (199), 48 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:04:15,333 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:04:17,412 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:04:19,544 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:04:21,671 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:04:23,782 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:04:25,910 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:04:28,035 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:04:30,125 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:04:32,272 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:04:40,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:04:40,425 INFO L93 Difference]: Finished difference Result 266 states and 331 transitions. [2021-11-05 13:04:40,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-05 13:04:40,426 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.145833333333333) internal successors, (199), 48 states have internal predecessors, (199), 0 states have call successors, (0), 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 74 [2021-11-05 13:04:40,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:04:40,427 INFO L225 Difference]: With dead ends: 266 [2021-11-05 13:04:40,427 INFO L226 Difference]: Without dead ends: 215 [2021-11-05 13:04:40,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 128 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 12842.20ms TimeCoverageRelationStatistics Valid=729, Invalid=4241, Unknown=0, NotChecked=0, Total=4970 [2021-11-05 13:04:40,429 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 320 mSDsluCounter, 2890 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 29 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19020.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 3031 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.26ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 429 IncrementalHoareTripleChecker+Unchecked, 20100.55ms IncrementalHoareTripleChecker+Time [2021-11-05 13:04:40,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 3031 Invalid, 888 Unknown, 0 Unchecked, 6.26ms Time], IncrementalHoareTripleChecker [29 Valid, 421 Invalid, 9 Unknown, 429 Unchecked, 20100.55ms Time] [2021-11-05 13:04:40,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-05 13:04:40,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 198. [2021-11-05 13:04:40,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.2893401015228427) internal successors, (254), 197 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:04:40,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 254 transitions. [2021-11-05 13:04:40,446 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 254 transitions. Word has length 74 [2021-11-05 13:04:40,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:04:40,446 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 254 transitions. [2021-11-05 13:04:40,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.145833333333333) internal successors, (199), 48 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:04:40,447 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 254 transitions. [2021-11-05 13:04:40,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-05 13:04:40,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:04:40,447 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:04:40,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-05 13:04:40,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-05 13:04:40,648 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 13:04:40,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:04:40,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1678008553, now seen corresponding path program 1 times [2021-11-05 13:04:40,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:04:40,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559119922] [2021-11-05 13:04:40,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:04:40,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:04:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:04:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:04:45,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:04:45,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559119922] [2021-11-05 13:04:45,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559119922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:04:45,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:04:45,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-05 13:04:45,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455698026] [2021-11-05 13:04:45,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:04:45,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-05 13:04:45,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:04:45,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-05 13:04:45,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-11-05 13:04:45,587 INFO L87 Difference]: Start difference. First operand 198 states and 254 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 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) [2021-11-05 13:04:47,689 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:04:49,790 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:04:51,913 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:04:54,017 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:04:56,113 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:04:58,220 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:05:00,317 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:05:02,425 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:05:04,491 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:05:06,635 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:05:08,730 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:05:10,828 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:05:21,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:05:21,279 INFO L93 Difference]: Finished difference Result 334 states and 429 transitions. [2021-11-05 13:05:21,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-05 13:05:21,279 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 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 74 [2021-11-05 13:05:21,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:05:21,280 INFO L225 Difference]: With dead ends: 334 [2021-11-05 13:05:21,280 INFO L226 Difference]: Without dead ends: 288 [2021-11-05 13:05:21,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 6023.37ms TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-11-05 13:05:21,281 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 1311 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 1556 mSolverCounterSat, 194 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29067.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1311 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.38ms SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1556 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30585.77ms IncrementalHoareTripleChecker+Time [2021-11-05 13:05:21,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1311 Valid, 943 Invalid, 1762 Unknown, 0 Unchecked, 20.38ms Time], IncrementalHoareTripleChecker [194 Valid, 1556 Invalid, 12 Unknown, 0 Unchecked, 30585.77ms Time] [2021-11-05 13:05:21,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-05 13:05:21,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 219. [2021-11-05 13:05:21,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.2706422018348624) internal successors, (277), 218 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:05:21,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 277 transitions. [2021-11-05 13:05:21,292 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 277 transitions. Word has length 74 [2021-11-05 13:05:21,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:05:21,292 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 277 transitions. [2021-11-05 13:05:21,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 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) [2021-11-05 13:05:21,292 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 277 transitions. [2021-11-05 13:05:21,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-05 13:05:21,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:05:21,293 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:05:21,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-05 13:05:21,293 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 13:05:21,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:05:21,293 INFO L85 PathProgramCache]: Analyzing trace with hash -525541457, now seen corresponding path program 1 times [2021-11-05 13:05:21,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:05:21,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124272798] [2021-11-05 13:05:21,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:05:21,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:05:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:05:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:05:27,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:05:27,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124272798] [2021-11-05 13:05:27,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124272798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:05:27,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091813043] [2021-11-05 13:05:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:05:27,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:05:27,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:05:27,114 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 13:05:27,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-05 13:05:27,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:05:27,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 2972 conjuncts, 129 conjunts are in the unsatisfiable core [2021-11-05 13:05:27,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:05:27,911 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 [2021-11-05 13:05:28,187 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-05 13:05:28,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2021-11-05 13:05:28,625 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 27 treesize of output 23 [2021-11-05 13:05:28,653 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 [2021-11-05 13:05:30,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-05 13:05:30,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-05 13:05:30,814 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 15 treesize of output 15 [2021-11-05 13:05:30,940 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-05 13:05:30,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 87 [2021-11-05 13:05:30,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-05 13:05:30,994 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-05 13:05:30,994 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 58 [2021-11-05 13:05:31,062 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-05 13:05:31,063 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 57 treesize of output 59 [2021-11-05 13:05:33,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-05 13:05:33,809 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-05 13:05:33,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 102 [2021-11-05 13:05:33,942 INFO L354 Elim1Store]: treesize reduction 66, result has 29.0 percent of original size [2021-11-05 13:05:33,942 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 114 treesize of output 97 [2021-11-05 13:05:33,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-05 13:05:33,964 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 0 case distinctions, treesize of input 103 treesize of output 91 [2021-11-05 13:05:34,055 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-05 13:05:34,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 78 [2021-11-05 13:05:37,992 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 63 treesize of output 55 [2021-11-05 13:05:38,001 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-05 13:05:38,002 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 55 treesize of output 35 [2021-11-05 13:05:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:05:38,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:05:44,129 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-05 13:05:44,130 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 338 treesize of output 337 [2021-11-05 13:06:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:06:23,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091813043] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 13:06:23,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 13:06:23,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 15] total 49 [2021-11-05 13:06:23,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834133611] [2021-11-05 13:06:23,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 13:06:23,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-05 13:06:23,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:06:23,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-05 13:06:23,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2068, Unknown=0, NotChecked=0, Total=2352 [2021-11-05 13:06:23,764 INFO L87 Difference]: Start difference. First operand 219 states and 277 transitions. Second operand has 49 states, 49 states have (on average 4.122448979591836) internal successors, (202), 49 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:06:25,817 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:06:27,950 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:06:30,073 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:06:32,192 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:06:34,310 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:06:36,441 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:06:38,533 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:06:45,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:06:45,461 INFO L93 Difference]: Finished difference Result 292 states and 359 transitions. [2021-11-05 13:06:45,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-05 13:06:45,462 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.122448979591836) internal successors, (202), 49 states have internal predecessors, (202), 0 states have call successors, (0), 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 75 [2021-11-05 13:06:45,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:06:45,462 INFO L225 Difference]: With dead ends: 292 [2021-11-05 13:06:45,463 INFO L226 Difference]: Without dead ends: 241 [2021-11-05 13:06:45,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 16878.45ms TimeCoverageRelationStatistics Valid=836, Invalid=4864, Unknown=0, NotChecked=0, Total=5700 [2021-11-05 13:06:45,464 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 287 mSDsluCounter, 2478 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 28 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14891.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 2617 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.74ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 15765.99ms IncrementalHoareTripleChecker+Time [2021-11-05 13:06:45,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 2617 Invalid, 686 Unknown, 0 Unchecked, 5.74ms Time], IncrementalHoareTripleChecker [28 Valid, 374 Invalid, 7 Unknown, 277 Unchecked, 15765.99ms Time] [2021-11-05 13:06:45,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-05 13:06:45,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 220. [2021-11-05 13:06:45,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.269406392694064) internal successors, (278), 219 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:06:45,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 278 transitions. [2021-11-05 13:06:45,474 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 278 transitions. Word has length 75 [2021-11-05 13:06:45,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:06:45,474 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 278 transitions. [2021-11-05 13:06:45,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.122448979591836) internal successors, (202), 49 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:06:45,474 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 278 transitions. [2021-11-05 13:06:45,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-05 13:06:45,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:06:45,475 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:06:45,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-05 13:06:45,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:06:45,676 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 13:06:45,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:06:45,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1314639212, now seen corresponding path program 2 times [2021-11-05 13:06:45,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:06:45,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670344808] [2021-11-05 13:06:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:06:45,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:06:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:06:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:06:46,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:06:46,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670344808] [2021-11-05 13:06:46,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670344808] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:06:46,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549410965] [2021-11-05 13:06:46,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-05 13:06:46,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:06:46,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:06:46,770 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 13:06:46,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-05 13:06:47,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-05 13:06:47,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 13:06:47,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 2963 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-05 13:06:47,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:06:47,918 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 18 treesize of output 14 [2021-11-05 13:06:47,932 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 [2021-11-05 13:06:48,918 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-05 13:06:48,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 51 [2021-11-05 13:06:48,975 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-05 13:06:48,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 50 [2021-11-05 13:06:49,308 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-05 13:06:49,309 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 62 treesize of output 46 [2021-11-05 13:06:49,401 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-05 13:06:49,401 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 47 treesize of output 31 [2021-11-05 13:06:51,048 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 35 treesize of output 27 [2021-11-05 13:06:51,056 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 27 treesize of output 19 [2021-11-05 13:06:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-05 13:06:51,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 13:06:51,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549410965] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:06:51,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-05 13:06:51,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [14] total 30 [2021-11-05 13:06:51,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316891792] [2021-11-05 13:06:51,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:06:51,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-05 13:06:51,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:06:51,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-05 13:06:51,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-11-05 13:06:51,370 INFO L87 Difference]: Start difference. First operand 220 states and 278 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:06:53,431 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:06:55,571 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 13:06:59,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:06:59,447 INFO L93 Difference]: Finished difference Result 220 states and 278 transitions. [2021-11-05 13:06:59,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-05 13:06:59,447 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 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 75 [2021-11-05 13:06:59,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:06:59,447 INFO L225 Difference]: With dead ends: 220 [2021-11-05 13:06:59,448 INFO L226 Difference]: Without dead ends: 0 [2021-11-05 13:06:59,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 5139.78ms TimeCoverageRelationStatistics Valid=296, Invalid=1684, Unknown=0, NotChecked=0, Total=1980 [2021-11-05 13:06:59,449 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 1015 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 47 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4884.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.71ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5201.16ms IncrementalHoareTripleChecker+Time [2021-11-05 13:06:59,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1015 Valid, 851 Invalid, 310 Unknown, 0 Unchecked, 4.71ms Time], IncrementalHoareTripleChecker [47 Valid, 261 Invalid, 2 Unknown, 0 Unchecked, 5201.16ms Time] [2021-11-05 13:06:59,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-05 13:06:59,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-05 13:06:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:06:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-05 13:06:59,450 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2021-11-05 13:06:59,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:06:59,451 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-05 13:06:59,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 13:06:59,451 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-05 13:06:59,451 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-05 13:06:59,453 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-05 13:06:59,453 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-05 13:06:59,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-05 13:06:59,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-05 13:06:59,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-05 13:08:33,354 WARN L230 SmtUtils]: Spent 1.56m on a formula simplification that was a NOOP. DAG size: 250 [2021-11-05 13:08:46,342 WARN L230 SmtUtils]: Spent 12.44s on a formula simplification that was a NOOP. DAG size: 258 [2021-11-05 13:09:13,195 WARN L230 SmtUtils]: Spent 25.04s on a formula simplification that was a NOOP. DAG size: 264 Killed by 15