./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 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_byte_buf_reserve_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 de3da06dbfc8734cb93dce42b312357899e8d9cc914b94ba94740650fa2d8258 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 20:30:13,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 20:30:13,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 20:30:13,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 20:30:13,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 20:30:13,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 20:30:13,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 20:30:13,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 20:30:13,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 20:30:13,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 20:30:13,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 20:30:13,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 20:30:13,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 20:30:13,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 20:30:13,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 20:30:13,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 20:30:13,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 20:30:13,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 20:30:13,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 20:30:13,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 20:30:13,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 20:30:13,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 20:30:13,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 20:30:13,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 20:30:13,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 20:30:13,821 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 20:30:13,821 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 20:30:13,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 20:30:13,822 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 20:30:13,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 20:30:13,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 20:30:13,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 20:30:13,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 20:30:13,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 20:30:13,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 20:30:13,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 20:30:13,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 20:30:13,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 20:30:13,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 20:30:13,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 20:30:13,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 20:30:13,830 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-16 20:30:13,861 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 20:30:13,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 20:30:13,861 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 20:30:13,861 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 20:30:13,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 20:30:13,862 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 20:30:13,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 20:30:13,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 20:30:13,863 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 20:30:13,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 20:30:13,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-16 20:30:13,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 20:30:13,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 20:30:13,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 20:30:13,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 20:30:13,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 20:30:13,865 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 20:30:13,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 20:30:13,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 20:30:13,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 20:30:13,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 20:30:13,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 20:30:13,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 20:30:13,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 20:30:13,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 20:30:13,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-16 20:30:13,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-16 20:30:13,866 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 20:30:13,867 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 20:30:13,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 20:30:13,867 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 20:30:13,867 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de3da06dbfc8734cb93dce42b312357899e8d9cc914b94ba94740650fa2d8258 [2021-11-16 20:30:14,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 20:30:14,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 20:30:14,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 20:30:14,053 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 20:30:14,059 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 20:30:14,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i [2021-11-16 20:30:14,119 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea6777010/c13fbad534f0484da773ff83016ea73e/FLAGaf1c2dbb8 [2021-11-16 20:30:14,700 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 20:30:14,701 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i [2021-11-16 20:30:14,736 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea6777010/c13fbad534f0484da773ff83016ea73e/FLAGaf1c2dbb8 [2021-11-16 20:30:15,133 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea6777010/c13fbad534f0484da773ff83016ea73e [2021-11-16 20:30:15,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 20:30:15,136 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 20:30:15,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 20:30:15,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 20:30:15,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 20:30:15,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:30:15" (1/1) ... [2021-11-16 20:30:15,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fa65981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:15, skipping insertion in model container [2021-11-16 20:30:15,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:30:15" (1/1) ... [2021-11-16 20:30:15,146 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 20:30:15,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 20:30:15,425 WARN L230 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_byte_buf_reserve_harness.i[4494,4507] [2021-11-16 20:30:15,431 WARN L230 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_byte_buf_reserve_harness.i[4554,4567] [2021-11-16 20:30:15,447 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 20:30:15,452 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 20:30:16,032 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,035 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,035 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,036 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,037 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,046 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,052 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,053 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,054 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,280 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 20:30:16,281 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 20:30:16,281 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 20:30:16,282 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 20:30:16,283 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 20:30:16,283 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 20:30:16,284 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 20:30:16,284 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 20:30:16,284 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 20:30:16,285 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 20:30:16,376 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 20:30:16,402 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,403 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,486 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,488 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,534 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 20:30:16,567 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 20:30:16,574 WARN L230 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_byte_buf_reserve_harness.i[4494,4507] [2021-11-16 20:30:16,574 WARN L230 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_byte_buf_reserve_harness.i[4554,4567] [2021-11-16 20:30:16,575 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 20:30:16,576 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 20:30:16,592 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,592 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,592 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,593 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,593 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,596 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,597 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,598 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,598 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,616 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 20:30:16,616 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 20:30:16,617 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 20:30:16,617 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 20:30:16,618 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 20:30:16,618 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 20:30:16,621 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 20:30:16,622 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 20:30:16,622 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 20:30:16,623 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 20:30:16,637 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 20:30:16,648 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,650 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,701 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,701 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:30:16,725 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 20:30:16,869 INFO L208 MainTranslator]: Completed translation [2021-11-16 20:30:16,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:16 WrapperNode [2021-11-16 20:30:16,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 20:30:16,871 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 20:30:16,871 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 20:30:16,871 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 20:30:16,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:16" (1/1) ... [2021-11-16 20:30:16,953 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:16" (1/1) ... [2021-11-16 20:30:17,013 INFO L137 Inliner]: procedures = 694, calls = 2623, calls flagged for inlining = 60, calls inlined = 10, statements flattened = 953 [2021-11-16 20:30:17,014 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 20:30:17,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 20:30:17,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 20:30:17,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 20:30:17,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:16" (1/1) ... [2021-11-16 20:30:17,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:16" (1/1) ... [2021-11-16 20:30:17,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:16" (1/1) ... [2021-11-16 20:30:17,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:16" (1/1) ... [2021-11-16 20:30:17,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:16" (1/1) ... [2021-11-16 20:30:17,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:16" (1/1) ... [2021-11-16 20:30:17,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:16" (1/1) ... [2021-11-16 20:30:17,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 20:30:17,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 20:30:17,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 20:30:17,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 20:30:17,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:16" (1/1) ... [2021-11-16 20:30:17,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 20:30:17,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:17,105 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) [2021-11-16 20:30:17,128 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 [2021-11-16 20:30:17,137 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-16 20:30:17,137 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-16 20:30:17,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 20:30:17,138 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-16 20:30:17,138 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-16 20:30:17,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-16 20:30:17,139 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-16 20:30:17,139 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-16 20:30:17,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-16 20:30:17,139 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-16 20:30:17,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-16 20:30:17,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 20:30:17,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-16 20:30:17,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 20:30:17,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 20:30:17,140 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-16 20:30:17,140 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-16 20:30:17,141 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_realloc [2021-11-16 20:30:17,141 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_realloc [2021-11-16 20:30:17,141 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_reserve [2021-11-16 20:30:17,141 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_reserve [2021-11-16 20:30:17,142 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-11-16 20:30:17,142 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-11-16 20:30:17,142 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-16 20:30:17,142 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-16 20:30:17,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 20:30:17,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-16 20:30:17,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 20:30:17,143 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-16 20:30:17,143 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-16 20:30:17,143 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-16 20:30:17,143 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-16 20:30:17,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-16 20:30:17,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-16 20:30:17,350 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 20:30:17,355 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 20:30:18,319 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 20:30:18,323 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 20:30:18,323 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-16 20:30:18,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:30:18 BoogieIcfgContainer [2021-11-16 20:30:18,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 20:30:18,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 20:30:18,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 20:30:18,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 20:30:18,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:30:15" (1/3) ... [2021-11-16 20:30:18,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fc00e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:30:18, skipping insertion in model container [2021-11-16 20:30:18,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:30:16" (2/3) ... [2021-11-16 20:30:18,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fc00e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:30:18, skipping insertion in model container [2021-11-16 20:30:18,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:30:18" (3/3) ... [2021-11-16 20:30:18,330 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reserve_harness.i [2021-11-16 20:30:18,334 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 20:30:18,334 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 20:30:18,363 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 20:30:18,367 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 [2021-11-16 20:30:18,367 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 20:30:18,379 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 104 states have (on average 1.2884615384615385) internal successors, (134), 104 states have internal predecessors, (134), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-11-16 20:30:18,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-16 20:30:18,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:18,384 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:18,385 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:18,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:18,388 INFO L85 PathProgramCache]: Analyzing trace with hash 122195533, now seen corresponding path program 1 times [2021-11-16 20:30:18,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:18,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601973014] [2021-11-16 20:30:18,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:18,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:18,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:18,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:18,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:18,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:18,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:30:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:18,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-16 20:30:18,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:18,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601973014] [2021-11-16 20:30:18,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601973014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:18,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:30:18,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-16 20:30:18,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139668419] [2021-11-16 20:30:18,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:18,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 20:30:18,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:18,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 20:30:18,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 20:30:18,929 INFO L87 Difference]: Start difference. First operand has 153 states, 104 states have (on average 1.2884615384615385) internal successors, (134), 104 states have internal predecessors, (134), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-16 20:30:20,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:20,063 INFO L93 Difference]: Finished difference Result 318 states and 453 transitions. [2021-11-16 20:30:20,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 20:30:20,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2021-11-16 20:30:20,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:20,072 INFO L225 Difference]: With dead ends: 318 [2021-11-16 20:30:20,072 INFO L226 Difference]: Without dead ends: 168 [2021-11-16 20:30:20,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 20:30:20,077 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 90 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:20,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 232 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-16 20:30:20,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-16 20:30:20,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 146. [2021-11-16 20:30:20,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 97 states have (on average 1.2371134020618557) internal successors, (120), 98 states have internal predecessors, (120), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-16 20:30:20,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 193 transitions. [2021-11-16 20:30:20,109 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 193 transitions. Word has length 48 [2021-11-16 20:30:20,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:20,109 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 193 transitions. [2021-11-16 20:30:20,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-16 20:30:20,109 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 193 transitions. [2021-11-16 20:30:20,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-16 20:30:20,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:20,111 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:20,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-16 20:30:20,111 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:20,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:20,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1409458321, now seen corresponding path program 1 times [2021-11-16 20:30:20,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:20,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471253662] [2021-11-16 20:30:20,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:20,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:30:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:30:20,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-16 20:30:20,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:20,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471253662] [2021-11-16 20:30:20,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471253662] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:20,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:30:20,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 20:30:20,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45261147] [2021-11-16 20:30:20,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:20,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 20:30:20,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:20,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 20:30:20,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:30:20,330 INFO L87 Difference]: Start difference. First operand 146 states and 193 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-16 20:30:22,428 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:30:23,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:23,036 INFO L93 Difference]: Finished difference Result 323 states and 440 transitions. [2021-11-16 20:30:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 20:30:23,037 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 50 [2021-11-16 20:30:23,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:23,039 INFO L225 Difference]: With dead ends: 323 [2021-11-16 20:30:23,043 INFO L226 Difference]: Without dead ends: 193 [2021-11-16 20:30:23,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:30:23,048 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 311 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 205 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:23,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 363 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 385 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-16 20:30:23,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-16 20:30:23,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2021-11-16 20:30:23,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 99 states have (on average 1.2323232323232323) internal successors, (122), 101 states have internal predecessors, (122), 37 states have call successors, (37), 11 states have call predecessors, (37), 12 states have return successors, (40), 36 states have call predecessors, (40), 36 states have call successors, (40) [2021-11-16 20:30:23,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 199 transitions. [2021-11-16 20:30:23,075 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 199 transitions. Word has length 50 [2021-11-16 20:30:23,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:23,075 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 199 transitions. [2021-11-16 20:30:23,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-16 20:30:23,076 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 199 transitions. [2021-11-16 20:30:23,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-16 20:30:23,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:23,077 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:23,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-16 20:30:23,078 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:23,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:23,078 INFO L85 PathProgramCache]: Analyzing trace with hash -564986084, now seen corresponding path program 1 times [2021-11-16 20:30:23,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:23,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386690763] [2021-11-16 20:30:23,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:23,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:23,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:23,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:23,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:23,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:23,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:30:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:23,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:23,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-16 20:30:23,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:23,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386690763] [2021-11-16 20:30:23,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386690763] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:23,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:30:23,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-16 20:30:23,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576841399] [2021-11-16 20:30:23,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:23,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:30:23,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:23,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:30:23,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-16 20:30:23,289 INFO L87 Difference]: Start difference. First operand 149 states and 199 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-16 20:30:24,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:24,034 INFO L93 Difference]: Finished difference Result 261 states and 346 transitions. [2021-11-16 20:30:24,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-16 20:30:24,035 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 56 [2021-11-16 20:30:24,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:24,036 INFO L225 Difference]: With dead ends: 261 [2021-11-16 20:30:24,036 INFO L226 Difference]: Without dead ends: 203 [2021-11-16 20:30:24,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-16 20:30:24,038 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 269 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:24,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 636 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-16 20:30:24,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-16 20:30:24,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 153. [2021-11-16 20:30:24,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 102 states have (on average 1.2254901960784315) internal successors, (125), 104 states have internal predecessors, (125), 37 states have call successors, (37), 11 states have call predecessors, (37), 13 states have return successors, (41), 37 states have call predecessors, (41), 36 states have call successors, (41) [2021-11-16 20:30:24,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 203 transitions. [2021-11-16 20:30:24,048 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 203 transitions. Word has length 56 [2021-11-16 20:30:24,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:24,049 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 203 transitions. [2021-11-16 20:30:24,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-16 20:30:24,049 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 203 transitions. [2021-11-16 20:30:24,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-16 20:30:24,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:24,051 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:24,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-16 20:30:24,051 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:24,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:24,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1211897445, now seen corresponding path program 1 times [2021-11-16 20:30:24,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:24,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781582560] [2021-11-16 20:30:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:24,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:24,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:24,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:24,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:24,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:24,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:30:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:24,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:30:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:24,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-16 20:30:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-16 20:30:24,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:24,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781582560] [2021-11-16 20:30:24,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781582560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:24,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672517690] [2021-11-16 20:30:24,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:24,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:24,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:24,263 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) [2021-11-16 20:30:24,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-16 20:30:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:24,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 2432 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-16 20:30:24,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 20:30:24,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:24,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672517690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:24,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:24,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-16 20:30:24,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655038192] [2021-11-16 20:30:24,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:24,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 20:30:24,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:24,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 20:30:24,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-16 20:30:24,830 INFO L87 Difference]: Start difference. First operand 153 states and 203 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-16 20:30:25,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:25,046 INFO L93 Difference]: Finished difference Result 280 states and 370 transitions. [2021-11-16 20:30:25,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 20:30:25,047 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 63 [2021-11-16 20:30:25,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:25,048 INFO L225 Difference]: With dead ends: 280 [2021-11-16 20:30:25,048 INFO L226 Difference]: Without dead ends: 150 [2021-11-16 20:30:25,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-16 20:30:25,049 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 258 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:25,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 642 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 20:30:25,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-16 20:30:25,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-11-16 20:30:25,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 100 states have (on average 1.22) internal successors, (122), 101 states have internal predecessors, (122), 37 states have call successors, (37), 11 states have call predecessors, (37), 12 states have return successors, (37), 37 states have call predecessors, (37), 36 states have call successors, (37) [2021-11-16 20:30:25,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 196 transitions. [2021-11-16 20:30:25,059 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 196 transitions. Word has length 63 [2021-11-16 20:30:25,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:25,059 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 196 transitions. [2021-11-16 20:30:25,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-16 20:30:25,059 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 196 transitions. [2021-11-16 20:30:25,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-16 20:30:25,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:25,061 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:25,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:25,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:25,270 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:25,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:25,271 INFO L85 PathProgramCache]: Analyzing trace with hash -747455974, now seen corresponding path program 1 times [2021-11-16 20:30:25,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:25,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704036185] [2021-11-16 20:30:25,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:25,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:30:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:30:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-16 20:30:25,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:25,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704036185] [2021-11-16 20:30:25,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704036185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:25,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:30:25,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-16 20:30:25,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803512849] [2021-11-16 20:30:25,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:25,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 20:30:25,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:25,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 20:30:25,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:30:25,542 INFO L87 Difference]: Start difference. First operand 150 states and 196 transitions. Second operand has 11 states, 10 states have (on average 4.2) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-16 20:30:26,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:26,446 INFO L93 Difference]: Finished difference Result 212 states and 286 transitions. [2021-11-16 20:30:26,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 20:30:26,446 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 68 [2021-11-16 20:30:26,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:26,448 INFO L225 Difference]: With dead ends: 212 [2021-11-16 20:30:26,448 INFO L226 Difference]: Without dead ends: 210 [2021-11-16 20:30:26,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-11-16 20:30:26,449 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 298 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:26,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 849 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-16 20:30:26,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-16 20:30:26,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 159. [2021-11-16 20:30:26,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 106 states have (on average 1.2075471698113207) internal successors, (128), 108 states have internal predecessors, (128), 38 states have call successors, (38), 12 states have call predecessors, (38), 14 states have return successors, (44), 38 states have call predecessors, (44), 37 states have call successors, (44) [2021-11-16 20:30:26,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 210 transitions. [2021-11-16 20:30:26,459 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 210 transitions. Word has length 68 [2021-11-16 20:30:26,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:26,459 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 210 transitions. [2021-11-16 20:30:26,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-16 20:30:26,460 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 210 transitions. [2021-11-16 20:30:26,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-16 20:30:26,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:26,461 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:26,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-16 20:30:26,461 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:26,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:26,462 INFO L85 PathProgramCache]: Analyzing trace with hash 2108361110, now seen corresponding path program 1 times [2021-11-16 20:30:26,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:26,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549844692] [2021-11-16 20:30:26,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:26,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:30:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 20:30:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-16 20:30:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-16 20:30:26,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:26,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549844692] [2021-11-16 20:30:26,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549844692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:26,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:30:26,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-16 20:30:26,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211434414] [2021-11-16 20:30:26,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:26,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:30:26,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:26,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:30:26,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-16 20:30:26,672 INFO L87 Difference]: Start difference. First operand 159 states and 210 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-16 20:30:27,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:27,604 INFO L93 Difference]: Finished difference Result 281 states and 367 transitions. [2021-11-16 20:30:27,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-16 20:30:27,605 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 70 [2021-11-16 20:30:27,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:27,606 INFO L225 Difference]: With dead ends: 281 [2021-11-16 20:30:27,606 INFO L226 Difference]: Without dead ends: 217 [2021-11-16 20:30:27,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-16 20:30:27,607 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 117 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:27,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 674 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-16 20:30:27,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-16 20:30:27,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 159. [2021-11-16 20:30:27,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 106 states have (on average 1.2075471698113207) internal successors, (128), 108 states have internal predecessors, (128), 38 states have call successors, (38), 12 states have call predecessors, (38), 14 states have return successors, (44), 38 states have call predecessors, (44), 37 states have call successors, (44) [2021-11-16 20:30:27,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 210 transitions. [2021-11-16 20:30:27,616 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 210 transitions. Word has length 70 [2021-11-16 20:30:27,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:27,616 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 210 transitions. [2021-11-16 20:30:27,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-16 20:30:27,616 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 210 transitions. [2021-11-16 20:30:27,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-16 20:30:27,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:27,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:27,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-16 20:30:27,617 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:27,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:27,618 INFO L85 PathProgramCache]: Analyzing trace with hash -856300446, now seen corresponding path program 1 times [2021-11-16 20:30:27,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:27,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889855334] [2021-11-16 20:30:27,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:27,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:30:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:30:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-16 20:30:27,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:27,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889855334] [2021-11-16 20:30:27,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889855334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:27,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:30:27,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 20:30:27,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912411768] [2021-11-16 20:30:27,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:27,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 20:30:27,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:27,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 20:30:27,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:30:27,826 INFO L87 Difference]: Start difference. First operand 159 states and 210 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-16 20:30:28,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:28,880 INFO L93 Difference]: Finished difference Result 377 states and 539 transitions. [2021-11-16 20:30:28,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 20:30:28,881 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 72 [2021-11-16 20:30:28,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:28,882 INFO L225 Difference]: With dead ends: 377 [2021-11-16 20:30:28,882 INFO L226 Difference]: Without dead ends: 234 [2021-11-16 20:30:28,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:30:28,883 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 377 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:28,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 395 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-16 20:30:28,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-16 20:30:28,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 164. [2021-11-16 20:30:28,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 111 states have (on average 1.2162162162162162) internal successors, (135), 113 states have internal predecessors, (135), 38 states have call successors, (38), 12 states have call predecessors, (38), 14 states have return successors, (44), 38 states have call predecessors, (44), 37 states have call successors, (44) [2021-11-16 20:30:28,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 217 transitions. [2021-11-16 20:30:28,901 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 217 transitions. Word has length 72 [2021-11-16 20:30:28,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:28,902 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 217 transitions. [2021-11-16 20:30:28,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-16 20:30:28,902 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 217 transitions. [2021-11-16 20:30:28,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-16 20:30:28,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:28,903 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:28,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-16 20:30:28,903 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:28,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:28,904 INFO L85 PathProgramCache]: Analyzing trace with hash -598135008, now seen corresponding path program 1 times [2021-11-16 20:30:28,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:28,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737300379] [2021-11-16 20:30:28,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:28,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:29,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:29,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:29,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:29,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:29,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:30:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:29,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:29,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:29,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:30:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 20:30:29,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:29,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737300379] [2021-11-16 20:30:29,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737300379] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:29,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058838691] [2021-11-16 20:30:29,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:29,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:29,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:29,300 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) [2021-11-16 20:30:29,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-16 20:30:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:29,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 2465 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-16 20:30:29,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:29,745 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 16 treesize of output 12 [2021-11-16 20:30:29,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 20:30:29,994 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-16 20:30:29,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 1 [2021-11-16 20:30:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:30:30,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:30,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058838691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:30,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:30,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 18 [2021-11-16 20:30:30,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311686619] [2021-11-16 20:30:30,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:30,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 20:30:30,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:30,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 20:30:30,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-16 20:30:30,053 INFO L87 Difference]: Start difference. First operand 164 states and 217 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 9 states have internal predecessors, (55), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-16 20:30:30,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:30,158 INFO L93 Difference]: Finished difference Result 335 states and 441 transitions. [2021-11-16 20:30:30,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 20:30:30,159 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 9 states have internal predecessors, (55), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 72 [2021-11-16 20:30:30,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:30,160 INFO L225 Difference]: With dead ends: 335 [2021-11-16 20:30:30,160 INFO L226 Difference]: Without dead ends: 183 [2021-11-16 20:30:30,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-16 20:30:30,161 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 19 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:30,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 1344 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 134 Unchecked, 0.1s Time] [2021-11-16 20:30:30,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-16 20:30:30,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2021-11-16 20:30:30,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 131 states have internal predecessors, (158), 38 states have call successors, (38), 13 states have call predecessors, (38), 15 states have return successors, (44), 38 states have call predecessors, (44), 37 states have call successors, (44) [2021-11-16 20:30:30,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 240 transitions. [2021-11-16 20:30:30,176 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 240 transitions. Word has length 72 [2021-11-16 20:30:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:30,176 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 240 transitions. [2021-11-16 20:30:30,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 9 states have internal predecessors, (55), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-16 20:30:30,176 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 240 transitions. [2021-11-16 20:30:30,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-16 20:30:30,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:30,177 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:30,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:30,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-16 20:30:30,384 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:30,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:30,384 INFO L85 PathProgramCache]: Analyzing trace with hash -951223390, now seen corresponding path program 1 times [2021-11-16 20:30:30,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:30,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253589205] [2021-11-16 20:30:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:30,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:30:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:30,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:30:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-16 20:30:30,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:30,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253589205] [2021-11-16 20:30:30,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253589205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:30,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189526399] [2021-11-16 20:30:30,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:30,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:30,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:30,512 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) [2021-11-16 20:30:30,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-16 20:30:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 2460 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 20:30:30,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-16 20:30:30,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:30,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189526399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:30,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:30,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-11-16 20:30:30,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135006210] [2021-11-16 20:30:30,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:30,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 20:30:30,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:30,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 20:30:30,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:30:30,929 INFO L87 Difference]: Start difference. First operand 183 states and 240 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 20:30:30,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:30,950 INFO L93 Difference]: Finished difference Result 344 states and 460 transitions. [2021-11-16 20:30:30,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:30:30,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 72 [2021-11-16 20:30:30,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:30,951 INFO L225 Difference]: With dead ends: 344 [2021-11-16 20:30:30,951 INFO L226 Difference]: Without dead ends: 192 [2021-11-16 20:30:30,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:30:30,952 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 20 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:30,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 568 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:30:30,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-16 20:30:30,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 175. [2021-11-16 20:30:30,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 122 states have (on average 1.221311475409836) internal successors, (149), 123 states have internal predecessors, (149), 38 states have call successors, (38), 13 states have call predecessors, (38), 14 states have return successors, (43), 38 states have call predecessors, (43), 37 states have call successors, (43) [2021-11-16 20:30:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 230 transitions. [2021-11-16 20:30:30,959 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 230 transitions. Word has length 72 [2021-11-16 20:30:30,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:30,960 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 230 transitions. [2021-11-16 20:30:30,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 20:30:30,960 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 230 transitions. [2021-11-16 20:30:30,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-16 20:30:30,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:30,961 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:30,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-16 20:30:31,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:31,174 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:31,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:31,174 INFO L85 PathProgramCache]: Analyzing trace with hash -188012506, now seen corresponding path program 1 times [2021-11-16 20:30:31,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:31,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717091657] [2021-11-16 20:30:31,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:31,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:31,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-16 20:30:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 20:30:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:30:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-16 20:30:31,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:31,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717091657] [2021-11-16 20:30:31,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717091657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:31,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144693925] [2021-11-16 20:30:31,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:31,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:31,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:31,376 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) [2021-11-16 20:30:31,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-16 20:30:31,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 2472 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-16 20:30:31,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-16 20:30:31,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:31,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144693925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:31,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:31,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2021-11-16 20:30:31,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586959742] [2021-11-16 20:30:31,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:31,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:30:31,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:31,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:30:31,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:30:31,837 INFO L87 Difference]: Start difference. First operand 175 states and 230 transitions. Second operand has 9 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-16 20:30:31,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:31,935 INFO L93 Difference]: Finished difference Result 332 states and 439 transitions. [2021-11-16 20:30:31,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 20:30:31,936 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 76 [2021-11-16 20:30:31,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:31,937 INFO L225 Difference]: With dead ends: 332 [2021-11-16 20:30:31,937 INFO L226 Difference]: Without dead ends: 180 [2021-11-16 20:30:31,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-16 20:30:31,939 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 12 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:31,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1442 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:30:31,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-16 20:30:31,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2021-11-16 20:30:31,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 126 states have (on average 1.2142857142857142) internal successors, (153), 128 states have internal predecessors, (153), 38 states have call successors, (38), 13 states have call predecessors, (38), 15 states have return successors, (48), 38 states have call predecessors, (48), 37 states have call successors, (48) [2021-11-16 20:30:31,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 239 transitions. [2021-11-16 20:30:31,946 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 239 transitions. Word has length 76 [2021-11-16 20:30:31,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:31,946 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 239 transitions. [2021-11-16 20:30:31,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-16 20:30:31,946 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 239 transitions. [2021-11-16 20:30:31,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-16 20:30:31,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:31,947 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:31,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:32,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:32,163 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:32,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:32,164 INFO L85 PathProgramCache]: Analyzing trace with hash 908856363, now seen corresponding path program 1 times [2021-11-16 20:30:32,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:32,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971392708] [2021-11-16 20:30:32,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:32,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:32,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:32,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:32,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:32,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:32,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:32,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:30:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:32,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:32,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:30:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 20:30:32,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:32,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971392708] [2021-11-16 20:30:32,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971392708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:32,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522951820] [2021-11-16 20:30:32,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:32,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:32,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:32,288 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) [2021-11-16 20:30:32,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-16 20:30:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:32,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 2477 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 20:30:32,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 20:30:32,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:32,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522951820] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:32,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:32,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-11-16 20:30:32,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100223184] [2021-11-16 20:30:32,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:32,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 20:30:32,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:32,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 20:30:32,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:30:32,703 INFO L87 Difference]: Start difference. First operand 180 states and 239 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 20:30:32,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:32,738 INFO L93 Difference]: Finished difference Result 342 states and 461 transitions. [2021-11-16 20:30:32,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:30:32,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 78 [2021-11-16 20:30:32,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:32,740 INFO L225 Difference]: With dead ends: 342 [2021-11-16 20:30:32,740 INFO L226 Difference]: Without dead ends: 183 [2021-11-16 20:30:32,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:30:32,741 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 9 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:32,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 561 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:30:32,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-16 20:30:32,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2021-11-16 20:30:32,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 126 states have (on average 1.1984126984126984) internal successors, (151), 128 states have internal predecessors, (151), 38 states have call successors, (38), 13 states have call predecessors, (38), 15 states have return successors, (48), 38 states have call predecessors, (48), 37 states have call successors, (48) [2021-11-16 20:30:32,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 237 transitions. [2021-11-16 20:30:32,749 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 237 transitions. Word has length 78 [2021-11-16 20:30:32,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:32,749 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 237 transitions. [2021-11-16 20:30:32,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 20:30:32,749 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 237 transitions. [2021-11-16 20:30:32,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-16 20:30:32,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:32,750 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:32,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-16 20:30:32,959 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,SelfDestructingSolverStorable10 [2021-11-16 20:30:32,959 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:32,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:32,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1518245265, now seen corresponding path program 1 times [2021-11-16 20:30:32,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:32,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77505013] [2021-11-16 20:30:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:32,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:30:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:30:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-16 20:30:33,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:33,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77505013] [2021-11-16 20:30:33,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77505013] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:33,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072756847] [2021-11-16 20:30:33,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:33,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:33,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:33,089 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) [2021-11-16 20:30:33,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-16 20:30:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 2479 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 20:30:33,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-16 20:30:33,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:33,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072756847] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:33,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:33,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-11-16 20:30:33,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956761783] [2021-11-16 20:30:33,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:33,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 20:30:33,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:33,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 20:30:33,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:30:33,483 INFO L87 Difference]: Start difference. First operand 180 states and 237 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 20:30:33,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:33,510 INFO L93 Difference]: Finished difference Result 348 states and 473 transitions. [2021-11-16 20:30:33,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:30:33,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 78 [2021-11-16 20:30:33,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:33,512 INFO L225 Difference]: With dead ends: 348 [2021-11-16 20:30:33,512 INFO L226 Difference]: Without dead ends: 189 [2021-11-16 20:30:33,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:30:33,513 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 34 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:33,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 559 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:30:33,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-16 20:30:33,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 176. [2021-11-16 20:30:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 122 states have (on average 1.180327868852459) internal successors, (144), 124 states have internal predecessors, (144), 38 states have call successors, (38), 13 states have call predecessors, (38), 15 states have return successors, (48), 38 states have call predecessors, (48), 37 states have call successors, (48) [2021-11-16 20:30:33,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 230 transitions. [2021-11-16 20:30:33,520 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 230 transitions. Word has length 78 [2021-11-16 20:30:33,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:33,520 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 230 transitions. [2021-11-16 20:30:33,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 20:30:33,520 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 230 transitions. [2021-11-16 20:30:33,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-16 20:30:33,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:33,521 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:33,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-16 20:30:33,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:33,735 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:33,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:33,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1074344591, now seen corresponding path program 1 times [2021-11-16 20:30:33,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:33,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488134443] [2021-11-16 20:30:33,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:33,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:33,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:33,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:34,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:34,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:30:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:34,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:34,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:30:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-16 20:30:34,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:34,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488134443] [2021-11-16 20:30:34,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488134443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:34,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541418818] [2021-11-16 20:30:34,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:34,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:34,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:34,311 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) [2021-11-16 20:30:34,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-16 20:30:34,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:34,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 2474 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-16 20:30:34,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:34,704 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 19 treesize of output 1 [2021-11-16 20:30:35,228 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:30:35,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:30:35,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541418818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:35,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:30:35,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-11-16 20:30:35,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8992596] [2021-11-16 20:30:35,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:30:35,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-16 20:30:35,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:35,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-16 20:30:35,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-11-16 20:30:35,523 INFO L87 Difference]: Start difference. First operand 176 states and 230 transitions. Second operand has 24 states, 23 states have (on average 4.217391304347826) internal successors, (97), 21 states have internal predecessors, (97), 7 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-16 20:30:37,608 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:30:41,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:41,015 INFO L93 Difference]: Finished difference Result 366 states and 491 transitions. [2021-11-16 20:30:41,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-16 20:30:41,016 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.217391304347826) internal successors, (97), 21 states have internal predecessors, (97), 7 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 78 [2021-11-16 20:30:41,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:41,017 INFO L225 Difference]: With dead ends: 366 [2021-11-16 20:30:41,017 INFO L226 Difference]: Without dead ends: 316 [2021-11-16 20:30:41,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=352, Invalid=1628, Unknown=0, NotChecked=0, Total=1980 [2021-11-16 20:30:41,018 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 432 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 2422 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 3546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 2422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 938 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:41,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 1346 Invalid, 3546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 2422 Invalid, 0 Unknown, 938 Unchecked, 4.8s Time] [2021-11-16 20:30:41,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-16 20:30:41,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 228. [2021-11-16 20:30:41,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 162 states have (on average 1.1728395061728396) internal successors, (190), 165 states have internal predecessors, (190), 45 states have call successors, (45), 15 states have call predecessors, (45), 20 states have return successors, (60), 47 states have call predecessors, (60), 44 states have call successors, (60) [2021-11-16 20:30:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 295 transitions. [2021-11-16 20:30:41,028 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 295 transitions. Word has length 78 [2021-11-16 20:30:41,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:41,029 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 295 transitions. [2021-11-16 20:30:41,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.217391304347826) internal successors, (97), 21 states have internal predecessors, (97), 7 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-16 20:30:41,029 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 295 transitions. [2021-11-16 20:30:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-16 20:30:41,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:41,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:41,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:41,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:41,235 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:41,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:41,236 INFO L85 PathProgramCache]: Analyzing trace with hash 94245687, now seen corresponding path program 1 times [2021-11-16 20:30:41,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:41,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131461529] [2021-11-16 20:30:41,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:41,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:41,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:41,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:41,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:41,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:41,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:41,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:30:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:41,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:41,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:30:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 20:30:41,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:41,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131461529] [2021-11-16 20:30:41,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131461529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:41,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916981952] [2021-11-16 20:30:41,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:41,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:41,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:41,595 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) [2021-11-16 20:30:41,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-16 20:30:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:41,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 2471 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-16 20:30:41,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:30:42,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:30:50,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916981952] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:50,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:30:50,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-11-16 20:30:50,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452463627] [2021-11-16 20:30:50,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:30:50,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-16 20:30:50,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:50,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-16 20:30:50,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=926, Unknown=2, NotChecked=0, Total=1056 [2021-11-16 20:30:50,091 INFO L87 Difference]: Start difference. First operand 228 states and 295 transitions. Second operand has 25 states, 25 states have (on average 3.32) internal successors, (83), 22 states have internal predecessors, (83), 6 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-16 20:30:53,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:53,296 INFO L93 Difference]: Finished difference Result 376 states and 524 transitions. [2021-11-16 20:30:53,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-16 20:30:53,297 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 22 states have internal predecessors, (83), 6 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 78 [2021-11-16 20:30:53,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:53,298 INFO L225 Difference]: With dead ends: 376 [2021-11-16 20:30:53,298 INFO L226 Difference]: Without dead ends: 344 [2021-11-16 20:30:53,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=566, Invalid=2294, Unknown=2, NotChecked=0, Total=2862 [2021-11-16 20:30:53,300 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 446 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 1878 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 2756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 607 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:53,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 916 Invalid, 2756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1878 Invalid, 0 Unknown, 607 Unchecked, 2.2s Time] [2021-11-16 20:30:53,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-16 20:30:53,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 269. [2021-11-16 20:30:53,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 194 states have (on average 1.1546391752577319) internal successors, (224), 197 states have internal predecessors, (224), 51 states have call successors, (51), 17 states have call predecessors, (51), 23 states have return successors, (77), 54 states have call predecessors, (77), 50 states have call successors, (77) [2021-11-16 20:30:53,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 352 transitions. [2021-11-16 20:30:53,312 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 352 transitions. Word has length 78 [2021-11-16 20:30:53,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:53,312 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 352 transitions. [2021-11-16 20:30:53,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 22 states have internal predecessors, (83), 6 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-16 20:30:53,312 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 352 transitions. [2021-11-16 20:30:53,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-16 20:30:53,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:53,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:53,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:53,527 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,SelfDestructingSolverStorable13 [2021-11-16 20:30:53,527 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:53,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:53,528 INFO L85 PathProgramCache]: Analyzing trace with hash -258842695, now seen corresponding path program 1 times [2021-11-16 20:30:53,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:53,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196114119] [2021-11-16 20:30:53,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:53,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:53,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:30:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:53,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:30:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:53,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:53,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:30:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:53,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:30:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:53,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:30:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:54,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:54,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:30:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 20:30:54,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:54,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196114119] [2021-11-16 20:30:54,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196114119] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:54,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544913112] [2021-11-16 20:30:54,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:54,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:54,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:54,169 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:30:54,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-16 20:30:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:54,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 2476 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-16 20:30:54,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:54,564 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 19 treesize of output 1 [2021-11-16 20:30:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:30:55,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:30:56,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544913112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:56,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:30:56,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-11-16 20:30:56,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499423811] [2021-11-16 20:30:56,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:30:56,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-16 20:30:56,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:56,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-16 20:30:56,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-11-16 20:30:56,074 INFO L87 Difference]: Start difference. First operand 269 states and 352 transitions. Second operand has 27 states, 26 states have (on average 3.5) internal successors, (91), 24 states have internal predecessors, (91), 7 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-16 20:30:59,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:59,939 INFO L93 Difference]: Finished difference Result 387 states and 538 transitions. [2021-11-16 20:30:59,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-16 20:30:59,939 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.5) internal successors, (91), 24 states have internal predecessors, (91), 7 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 78 [2021-11-16 20:30:59,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:59,941 INFO L225 Difference]: With dead ends: 387 [2021-11-16 20:30:59,941 INFO L226 Difference]: Without dead ends: 355 [2021-11-16 20:30:59,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=573, Invalid=2507, Unknown=0, NotChecked=0, Total=3080 [2021-11-16 20:30:59,943 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 450 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 2229 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 3151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 2229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 664 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:59,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 967 Invalid, 3151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 2229 Invalid, 0 Unknown, 664 Unchecked, 2.6s Time] [2021-11-16 20:30:59,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-11-16 20:30:59,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 259. [2021-11-16 20:30:59,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 184 states have (on average 1.1521739130434783) internal successors, (212), 188 states have internal predecessors, (212), 51 states have call successors, (51), 16 states have call predecessors, (51), 23 states have return successors, (77), 54 states have call predecessors, (77), 50 states have call successors, (77) [2021-11-16 20:30:59,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 340 transitions. [2021-11-16 20:30:59,956 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 340 transitions. Word has length 78 [2021-11-16 20:30:59,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:59,957 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 340 transitions. [2021-11-16 20:30:59,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.5) internal successors, (91), 24 states have internal predecessors, (91), 7 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-16 20:30:59,957 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 340 transitions. [2021-11-16 20:30:59,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-16 20:30:59,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:59,958 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:59,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-16 20:31:00,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-16 20:31:00,171 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:00,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:00,172 INFO L85 PathProgramCache]: Analyzing trace with hash -677257, now seen corresponding path program 1 times [2021-11-16 20:31:00,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:00,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871294263] [2021-11-16 20:31:00,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:00,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:00,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:00,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:31:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:00,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:00,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:31:00,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:00,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:31:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:00,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:31:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:00,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:31:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:00,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:31:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-16 20:31:00,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:00,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871294263] [2021-11-16 20:31:00,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871294263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:31:00,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:31:00,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 20:31:00,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513606720] [2021-11-16 20:31:00,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:31:00,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 20:31:00,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:00,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 20:31:00,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:31:00,373 INFO L87 Difference]: Start difference. First operand 259 states and 340 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-16 20:31:01,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:01,141 INFO L93 Difference]: Finished difference Result 529 states and 745 transitions. [2021-11-16 20:31:01,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 20:31:01,142 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 78 [2021-11-16 20:31:01,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:01,144 INFO L225 Difference]: With dead ends: 529 [2021-11-16 20:31:01,144 INFO L226 Difference]: Without dead ends: 310 [2021-11-16 20:31:01,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-16 20:31:01,146 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 314 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:01,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 399 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-16 20:31:01,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-16 20:31:01,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 257. [2021-11-16 20:31:01,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 182 states have (on average 1.1428571428571428) internal successors, (208), 186 states have internal predecessors, (208), 51 states have call successors, (51), 16 states have call predecessors, (51), 23 states have return successors, (77), 54 states have call predecessors, (77), 50 states have call successors, (77) [2021-11-16 20:31:01,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 336 transitions. [2021-11-16 20:31:01,164 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 336 transitions. Word has length 78 [2021-11-16 20:31:01,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:01,164 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 336 transitions. [2021-11-16 20:31:01,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-16 20:31:01,165 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 336 transitions. [2021-11-16 20:31:01,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-16 20:31:01,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:01,166 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:01,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-16 20:31:01,166 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:01,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:01,167 INFO L85 PathProgramCache]: Analyzing trace with hash 379201662, now seen corresponding path program 1 times [2021-11-16 20:31:01,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:01,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801307999] [2021-11-16 20:31:01,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:01,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:01,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:01,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:31:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:01,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:01,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:31:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:01,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:31:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:01,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:31:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:01,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:31:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:01,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:31:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-16 20:31:01,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:01,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801307999] [2021-11-16 20:31:01,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801307999] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:31:01,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:31:01,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-16 20:31:01,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553841507] [2021-11-16 20:31:01,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:31:01,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-16 20:31:01,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:01,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-16 20:31:01,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:31:01,357 INFO L87 Difference]: Start difference. First operand 257 states and 336 transitions. Second operand has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-16 20:31:02,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:02,486 INFO L93 Difference]: Finished difference Result 313 states and 433 transitions. [2021-11-16 20:31:02,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-16 20:31:02,486 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 80 [2021-11-16 20:31:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:02,490 INFO L225 Difference]: With dead ends: 313 [2021-11-16 20:31:02,490 INFO L226 Difference]: Without dead ends: 311 [2021-11-16 20:31:02,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-11-16 20:31:02,491 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 221 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:02,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 1065 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-16 20:31:02,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-16 20:31:02,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 257. [2021-11-16 20:31:02,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 182 states have (on average 1.1428571428571428) internal successors, (208), 186 states have internal predecessors, (208), 51 states have call successors, (51), 16 states have call predecessors, (51), 23 states have return successors, (77), 54 states have call predecessors, (77), 50 states have call successors, (77) [2021-11-16 20:31:02,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 336 transitions. [2021-11-16 20:31:02,513 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 336 transitions. Word has length 80 [2021-11-16 20:31:02,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:02,513 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 336 transitions. [2021-11-16 20:31:02,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-16 20:31:02,514 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 336 transitions. [2021-11-16 20:31:02,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-16 20:31:02,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:02,515 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:02,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-16 20:31:02,516 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:02,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:02,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1080266240, now seen corresponding path program 1 times [2021-11-16 20:31:02,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:02,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090573393] [2021-11-16 20:31:02,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:02,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:02,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:02,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:31:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:02,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:02,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:31:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:02,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:31:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:02,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:31:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:02,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:31:02,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:02,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:31:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 20:31:03,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:03,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090573393] [2021-11-16 20:31:03,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090573393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:31:03,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:31:03,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-16 20:31:03,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120469349] [2021-11-16 20:31:03,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:31:03,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-16 20:31:03,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:03,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-16 20:31:03,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-16 20:31:03,060 INFO L87 Difference]: Start difference. First operand 257 states and 336 transitions. Second operand has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 13 states have internal predecessors, (60), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-16 20:31:05,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:05,479 INFO L93 Difference]: Finished difference Result 330 states and 455 transitions. [2021-11-16 20:31:05,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-16 20:31:05,480 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 13 states have internal predecessors, (60), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 80 [2021-11-16 20:31:05,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:05,481 INFO L225 Difference]: With dead ends: 330 [2021-11-16 20:31:05,482 INFO L226 Difference]: Without dead ends: 328 [2021-11-16 20:31:05,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-11-16 20:31:05,482 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 368 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 2352 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 2352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:05,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 1075 Invalid, 2662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 2352 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-16 20:31:05,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-16 20:31:05,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 257. [2021-11-16 20:31:05,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 182 states have (on average 1.1428571428571428) internal successors, (208), 186 states have internal predecessors, (208), 51 states have call successors, (51), 16 states have call predecessors, (51), 23 states have return successors, (77), 54 states have call predecessors, (77), 50 states have call successors, (77) [2021-11-16 20:31:05,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 336 transitions. [2021-11-16 20:31:05,503 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 336 transitions. Word has length 80 [2021-11-16 20:31:05,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:05,504 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 336 transitions. [2021-11-16 20:31:05,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 13 states have internal predecessors, (60), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-16 20:31:05,504 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 336 transitions. [2021-11-16 20:31:05,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-16 20:31:05,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:05,506 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:05,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-16 20:31:05,506 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:05,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:05,507 INFO L85 PathProgramCache]: Analyzing trace with hash -650434166, now seen corresponding path program 1 times [2021-11-16 20:31:05,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:05,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879682963] [2021-11-16 20:31:05,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:05,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:05,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:05,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:31:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:05,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:05,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:31:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:05,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:31:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:05,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:31:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:05,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 20:31:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-16 20:31:05,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:05,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879682963] [2021-11-16 20:31:05,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879682963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:31:05,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:31:05,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-16 20:31:05,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354921573] [2021-11-16 20:31:05,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:31:05,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:31:05,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:05,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:31:05,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-16 20:31:05,684 INFO L87 Difference]: Start difference. First operand 257 states and 336 transitions. Second operand has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-16 20:31:06,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:06,244 INFO L93 Difference]: Finished difference Result 296 states and 397 transitions. [2021-11-16 20:31:06,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 20:31:06,244 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 81 [2021-11-16 20:31:06,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:06,246 INFO L225 Difference]: With dead ends: 296 [2021-11-16 20:31:06,246 INFO L226 Difference]: Without dead ends: 294 [2021-11-16 20:31:06,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-16 20:31:06,246 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 112 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:06,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 1011 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-16 20:31:06,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-11-16 20:31:06,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 262. [2021-11-16 20:31:06,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 185 states have (on average 1.1405405405405404) internal successors, (211), 189 states have internal predecessors, (211), 52 states have call successors, (52), 17 states have call predecessors, (52), 24 states have return successors, (78), 55 states have call predecessors, (78), 51 states have call successors, (78) [2021-11-16 20:31:06,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 341 transitions. [2021-11-16 20:31:06,257 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 341 transitions. Word has length 81 [2021-11-16 20:31:06,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:06,258 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 341 transitions. [2021-11-16 20:31:06,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-16 20:31:06,258 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 341 transitions. [2021-11-16 20:31:06,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-16 20:31:06,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:06,259 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:06,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-16 20:31:06,259 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:06,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:06,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1080744722, now seen corresponding path program 1 times [2021-11-16 20:31:06,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:06,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652261673] [2021-11-16 20:31:06,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:06,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:06,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:06,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:31:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:06,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:06,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:31:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:06,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:31:06,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:06,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:31:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:06,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:31:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:06,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:31:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:06,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:31:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 20:31:06,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:06,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652261673] [2021-11-16 20:31:06,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652261673] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:31:06,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389309522] [2021-11-16 20:31:06,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:06,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:31:06,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:31:06,581 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:31:06,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-16 20:31:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:06,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 2494 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-16 20:31:06,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:31:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-16 20:31:07,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:31:09,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389309522] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:31:09,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:31:09,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-11-16 20:31:09,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730430548] [2021-11-16 20:31:09,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:31:09,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-16 20:31:09,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:09,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-16 20:31:09,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=432, Unknown=1, NotChecked=0, Total=506 [2021-11-16 20:31:09,898 INFO L87 Difference]: Start difference. First operand 262 states and 341 transitions. Second operand has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 18 states have internal predecessors, (91), 6 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-16 20:31:13,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:13,400 INFO L93 Difference]: Finished difference Result 373 states and 502 transitions. [2021-11-16 20:31:13,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-16 20:31:13,401 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 18 states have internal predecessors, (91), 6 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 86 [2021-11-16 20:31:13,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:13,408 INFO L225 Difference]: With dead ends: 373 [2021-11-16 20:31:13,409 INFO L226 Difference]: Without dead ends: 336 [2021-11-16 20:31:13,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 131 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=308, Invalid=1097, Unknown=1, NotChecked=0, Total=1406 [2021-11-16 20:31:13,411 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 258 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:13,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 847 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1751 Invalid, 0 Unknown, 353 Unchecked, 2.9s Time] [2021-11-16 20:31:13,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-16 20:31:13,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 273. [2021-11-16 20:31:13,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 196 states have (on average 1.1326530612244898) internal successors, (222), 199 states have internal predecessors, (222), 52 states have call successors, (52), 18 states have call predecessors, (52), 24 states have return successors, (77), 55 states have call predecessors, (77), 51 states have call successors, (77) [2021-11-16 20:31:13,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 351 transitions. [2021-11-16 20:31:13,435 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 351 transitions. Word has length 86 [2021-11-16 20:31:13,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:13,436 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 351 transitions. [2021-11-16 20:31:13,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 18 states have internal predecessors, (91), 6 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-16 20:31:13,436 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 351 transitions. [2021-11-16 20:31:13,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-16 20:31:13,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:13,437 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:13,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-16 20:31:13,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:31:13,643 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:13,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:13,644 INFO L85 PathProgramCache]: Analyzing trace with hash -306040688, now seen corresponding path program 1 times [2021-11-16 20:31:13,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:13,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898188157] [2021-11-16 20:31:13,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:13,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:13,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:13,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:31:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:13,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:13,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:31:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:13,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:31:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:13,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:31:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:13,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:31:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:13,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:31:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:13,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:31:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-16 20:31:13,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:13,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898188157] [2021-11-16 20:31:13,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898188157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:31:13,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:31:13,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-16 20:31:13,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978880693] [2021-11-16 20:31:13,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:31:13,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 20:31:13,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:13,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 20:31:13,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:31:13,963 INFO L87 Difference]: Start difference. First operand 273 states and 351 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-16 20:31:15,700 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:31:17,772 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:31:18,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:18,966 INFO L93 Difference]: Finished difference Result 341 states and 465 transitions. [2021-11-16 20:31:18,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-16 20:31:18,967 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 86 [2021-11-16 20:31:18,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:18,969 INFO L225 Difference]: With dead ends: 341 [2021-11-16 20:31:18,969 INFO L226 Difference]: Without dead ends: 339 [2021-11-16 20:31:18,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-11-16 20:31:18,970 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 158 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 109 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:18,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 587 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 924 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2021-11-16 20:31:18,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-16 20:31:18,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 280. [2021-11-16 20:31:18,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 200 states have (on average 1.13) internal successors, (226), 203 states have internal predecessors, (226), 54 states have call successors, (54), 19 states have call predecessors, (54), 25 states have return successors, (79), 57 states have call predecessors, (79), 53 states have call successors, (79) [2021-11-16 20:31:18,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 359 transitions. [2021-11-16 20:31:18,999 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 359 transitions. Word has length 86 [2021-11-16 20:31:18,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:19,000 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 359 transitions. [2021-11-16 20:31:19,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-16 20:31:19,000 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 359 transitions. [2021-11-16 20:31:19,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-16 20:31:19,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:19,001 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:19,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-16 20:31:19,001 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:19,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:19,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1624785870, now seen corresponding path program 1 times [2021-11-16 20:31:19,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:19,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666953121] [2021-11-16 20:31:19,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:19,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:19,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:19,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:31:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:19,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:19,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:31:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:19,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:31:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:19,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:31:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:19,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 20:31:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-16 20:31:19,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:19,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666953121] [2021-11-16 20:31:19,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666953121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:31:19,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072358575] [2021-11-16 20:31:19,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:19,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:31:19,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:31:19,326 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:31:19,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-16 20:31:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:19,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 2487 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-16 20:31:19,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:31:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-16 20:31:20,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:31:20,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-16 20:31:20,835 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-16 20:31:20,835 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 31 treesize of output 26 [2021-11-16 20:31:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-16 20:31:20,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072358575] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:31:20,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:31:20,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 27 [2021-11-16 20:31:20,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854801860] [2021-11-16 20:31:20,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:31:20,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-16 20:31:20,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:20,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-16 20:31:20,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-11-16 20:31:20,903 INFO L87 Difference]: Start difference. First operand 280 states and 359 transitions. Second operand has 27 states, 27 states have (on average 4.333333333333333) internal successors, (117), 24 states have internal predecessors, (117), 7 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-16 20:31:24,722 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:31:28,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:28,127 INFO L93 Difference]: Finished difference Result 564 states and 755 transitions. [2021-11-16 20:31:28,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-16 20:31:28,140 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.333333333333333) internal successors, (117), 24 states have internal predecessors, (117), 7 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 85 [2021-11-16 20:31:28,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:28,142 INFO L225 Difference]: With dead ends: 564 [2021-11-16 20:31:28,142 INFO L226 Difference]: Without dead ends: 463 [2021-11-16 20:31:28,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 175 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=387, Invalid=2063, Unknown=0, NotChecked=0, Total=2450 [2021-11-16 20:31:28,144 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 305 mSDsluCounter, 1844 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 120 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 2121 SdHoareTripleChecker+Invalid, 2748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 679 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:28,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 2121 Invalid, 2748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1948 Invalid, 1 Unknown, 679 Unchecked, 6.2s Time] [2021-11-16 20:31:28,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-11-16 20:31:28,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 388. [2021-11-16 20:31:28,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 279 states have (on average 1.1541218637992832) internal successors, (322), 290 states have internal predecessors, (322), 73 states have call successors, (73), 21 states have call predecessors, (73), 35 states have return successors, (132), 76 states have call predecessors, (132), 72 states have call successors, (132) [2021-11-16 20:31:28,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 527 transitions. [2021-11-16 20:31:28,167 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 527 transitions. Word has length 85 [2021-11-16 20:31:28,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:28,167 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 527 transitions. [2021-11-16 20:31:28,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.333333333333333) internal successors, (117), 24 states have internal predecessors, (117), 7 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-16 20:31:28,168 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 527 transitions. [2021-11-16 20:31:28,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-16 20:31:28,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:28,169 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:28,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-16 20:31:28,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-16 20:31:28,387 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:28,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:28,388 INFO L85 PathProgramCache]: Analyzing trace with hash 748766864, now seen corresponding path program 1 times [2021-11-16 20:31:28,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:28,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479252737] [2021-11-16 20:31:28,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:28,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:31:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:31:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:31:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:31:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 20:31:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:28,709 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-16 20:31:28,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:28,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479252737] [2021-11-16 20:31:28,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479252737] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:31:28,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398718051] [2021-11-16 20:31:28,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:28,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:31:28,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:31:28,711 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:31:28,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-16 20:31:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:29,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 2482 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-16 20:31:29,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:31:29,104 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 15 treesize of output 1 [2021-11-16 20:31:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-16 20:31:29,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:31:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-16 20:31:30,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398718051] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:31:30,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:31:30,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 11] total 33 [2021-11-16 20:31:30,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327588607] [2021-11-16 20:31:30,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:31:30,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-16 20:31:30,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:30,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-16 20:31:30,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-11-16 20:31:30,227 INFO L87 Difference]: Start difference. First operand 388 states and 527 transitions. Second operand has 33 states, 32 states have (on average 4.5625) internal successors, (146), 28 states have internal predecessors, (146), 11 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) [2021-11-16 20:31:34,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:34,769 INFO L93 Difference]: Finished difference Result 921 states and 1297 transitions. [2021-11-16 20:31:34,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-16 20:31:34,769 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.5625) internal successors, (146), 28 states have internal predecessors, (146), 11 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) Word has length 85 [2021-11-16 20:31:34,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:34,772 INFO L225 Difference]: With dead ends: 921 [2021-11-16 20:31:34,772 INFO L226 Difference]: Without dead ends: 588 [2021-11-16 20:31:34,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 168 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=424, Invalid=3358, Unknown=0, NotChecked=0, Total=3782 [2021-11-16 20:31:34,774 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 390 mSDsluCounter, 2676 mSDsCounter, 0 mSdLazyCounter, 2933 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 2890 SdHoareTripleChecker+Invalid, 3419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 2933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:34,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 2890 Invalid, 3419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 2933 Invalid, 0 Unknown, 347 Unchecked, 3.6s Time] [2021-11-16 20:31:34,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-11-16 20:31:34,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 461. [2021-11-16 20:31:34,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 333 states have (on average 1.162162162162162) internal successors, (387), 347 states have internal predecessors, (387), 86 states have call successors, (86), 22 states have call predecessors, (86), 41 states have return successors, (161), 91 states have call predecessors, (161), 85 states have call successors, (161) [2021-11-16 20:31:34,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 634 transitions. [2021-11-16 20:31:34,802 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 634 transitions. Word has length 85 [2021-11-16 20:31:34,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:34,802 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 634 transitions. [2021-11-16 20:31:34,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.5625) internal successors, (146), 28 states have internal predecessors, (146), 11 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) [2021-11-16 20:31:34,802 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 634 transitions. [2021-11-16 20:31:34,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-16 20:31:34,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:34,803 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:34,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-16 20:31:35,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-16 20:31:35,019 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:35,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:35,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1622871588, now seen corresponding path program 1 times [2021-11-16 20:31:35,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:35,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375732537] [2021-11-16 20:31:35,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:35,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:35,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:35,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:31:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:35,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:35,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:31:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:35,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:31:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:35,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:31:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:35,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-16 20:31:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-16 20:31:35,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:35,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375732537] [2021-11-16 20:31:35,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375732537] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:31:35,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921401531] [2021-11-16 20:31:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:35,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:31:35,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:31:35,170 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:31:35,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-16 20:31:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:35,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 2486 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-16 20:31:35,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:31:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-16 20:31:35,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:31:35,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921401531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:31:35,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:31:35,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2021-11-16 20:31:35,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587796777] [2021-11-16 20:31:35,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:31:35,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 20:31:35,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:35,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 20:31:35,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-16 20:31:35,717 INFO L87 Difference]: Start difference. First operand 461 states and 634 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 20:31:35,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:35,764 INFO L93 Difference]: Finished difference Result 842 states and 1145 transitions. [2021-11-16 20:31:35,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 20:31:35,764 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 89 [2021-11-16 20:31:35,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:35,766 INFO L225 Difference]: With dead ends: 842 [2021-11-16 20:31:35,766 INFO L226 Difference]: Without dead ends: 447 [2021-11-16 20:31:35,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:31:35,768 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 10 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:35,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1129 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:31:35,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-11-16 20:31:35,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 446. [2021-11-16 20:31:35,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 323 states have (on average 1.1486068111455108) internal successors, (371), 334 states have internal predecessors, (371), 81 states have call successors, (81), 22 states have call predecessors, (81), 41 states have return successors, (153), 89 states have call predecessors, (153), 80 states have call successors, (153) [2021-11-16 20:31:35,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 605 transitions. [2021-11-16 20:31:35,793 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 605 transitions. Word has length 89 [2021-11-16 20:31:35,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:35,795 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 605 transitions. [2021-11-16 20:31:35,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 20:31:35,799 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 605 transitions. [2021-11-16 20:31:35,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-16 20:31:35,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:35,803 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:35,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-16 20:31:36,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-16 20:31:36,015 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:36,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:36,016 INFO L85 PathProgramCache]: Analyzing trace with hash 119789218, now seen corresponding path program 1 times [2021-11-16 20:31:36,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:36,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456277741] [2021-11-16 20:31:36,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:36,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:31:36,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:31:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:31:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:31:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:31:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:31:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:31:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-16 20:31:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,208 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-16 20:31:36,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:36,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456277741] [2021-11-16 20:31:36,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456277741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:31:36,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:31:36,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-16 20:31:36,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004941149] [2021-11-16 20:31:36,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:31:36,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 20:31:36,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:36,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 20:31:36,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:31:36,210 INFO L87 Difference]: Start difference. First operand 446 states and 605 transitions. Second operand has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 6 states have internal predecessors, (49), 4 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-16 20:31:37,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:37,447 INFO L93 Difference]: Finished difference Result 487 states and 676 transitions. [2021-11-16 20:31:37,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-16 20:31:37,447 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 6 states have internal predecessors, (49), 4 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 92 [2021-11-16 20:31:37,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:37,449 INFO L225 Difference]: With dead ends: 487 [2021-11-16 20:31:37,449 INFO L226 Difference]: Without dead ends: 485 [2021-11-16 20:31:37,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-11-16 20:31:37,450 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 157 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:37,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 655 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-16 20:31:37,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-11-16 20:31:37,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 449. [2021-11-16 20:31:37,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 325 states have (on average 1.1476923076923078) internal successors, (373), 337 states have internal predecessors, (373), 81 states have call successors, (81), 23 states have call predecessors, (81), 42 states have return successors, (153), 88 states have call predecessors, (153), 80 states have call successors, (153) [2021-11-16 20:31:37,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 607 transitions. [2021-11-16 20:31:37,476 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 607 transitions. Word has length 92 [2021-11-16 20:31:37,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:37,476 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 607 transitions. [2021-11-16 20:31:37,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 6 states have internal predecessors, (49), 4 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-16 20:31:37,477 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 607 transitions. [2021-11-16 20:31:37,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-16 20:31:37,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:37,478 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:37,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-16 20:31:37,478 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:37,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:37,479 INFO L85 PathProgramCache]: Analyzing trace with hash 426034535, now seen corresponding path program 1 times [2021-11-16 20:31:37,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:37,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141549485] [2021-11-16 20:31:37,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:37,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:37,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:37,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:31:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:37,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:37,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:31:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:37,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:31:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:37,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:31:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:37,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-16 20:31:37,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-16 20:31:37,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:37,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141549485] [2021-11-16 20:31:37,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141549485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:31:37,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639397] [2021-11-16 20:31:37,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:37,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:31:37,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:31:37,731 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:31:37,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-16 20:31:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:38,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 2488 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-16 20:31:38,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:31:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-16 20:31:39,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:31:39,686 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-16 20:31:39,687 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 39 treesize of output 1 [2021-11-16 20:31:39,811 INFO L354 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2021-11-16 20:31:39,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-11-16 20:31:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-16 20:31:39,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639397] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:31:39,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:31:39,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 14] total 36 [2021-11-16 20:31:39,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285032784] [2021-11-16 20:31:39,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:31:39,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-16 20:31:39,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:39,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-16 20:31:39,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-11-16 20:31:39,944 INFO L87 Difference]: Start difference. First operand 449 states and 607 transitions. Second operand has 36 states, 36 states have (on average 4.333333333333333) internal successors, (156), 33 states have internal predecessors, (156), 8 states have call successors, (21), 6 states have call predecessors, (21), 7 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2021-11-16 20:31:42,667 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:31:45,440 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:31:49,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:49,024 INFO L93 Difference]: Finished difference Result 656 states and 860 transitions. [2021-11-16 20:31:49,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-16 20:31:49,024 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.333333333333333) internal successors, (156), 33 states have internal predecessors, (156), 8 states have call successors, (21), 6 states have call predecessors, (21), 7 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) Word has length 91 [2021-11-16 20:31:49,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:49,026 INFO L225 Difference]: With dead ends: 656 [2021-11-16 20:31:49,027 INFO L226 Difference]: Without dead ends: 548 [2021-11-16 20:31:49,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 174 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=707, Invalid=4123, Unknown=0, NotChecked=0, Total=4830 [2021-11-16 20:31:49,028 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 406 mSDsluCounter, 1704 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 185 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 1900 SdHoareTripleChecker+Invalid, 3005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:49,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 1900 Invalid, 3005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 2425 Invalid, 2 Unknown, 393 Unchecked, 7.7s Time] [2021-11-16 20:31:49,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-11-16 20:31:49,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 459. [2021-11-16 20:31:49,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 337 states have (on average 1.1454005934718101) internal successors, (386), 346 states have internal predecessors, (386), 79 states have call successors, (79), 24 states have call predecessors, (79), 42 states have return successors, (145), 88 states have call predecessors, (145), 78 states have call successors, (145) [2021-11-16 20:31:49,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 610 transitions. [2021-11-16 20:31:49,051 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 610 transitions. Word has length 91 [2021-11-16 20:31:49,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:49,051 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 610 transitions. [2021-11-16 20:31:49,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.333333333333333) internal successors, (156), 33 states have internal predecessors, (156), 8 states have call successors, (21), 6 states have call predecessors, (21), 7 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2021-11-16 20:31:49,052 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 610 transitions. [2021-11-16 20:31:49,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-16 20:31:49,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:49,053 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:49,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-16 20:31:49,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:31:49,267 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:49,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:49,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1329458343, now seen corresponding path program 1 times [2021-11-16 20:31:49,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:49,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67949162] [2021-11-16 20:31:49,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:49,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:49,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:49,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:31:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:49,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:49,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:31:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:49,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:31:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:49,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:31:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:49,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-16 20:31:49,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-16 20:31:49,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:49,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67949162] [2021-11-16 20:31:49,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67949162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:31:49,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:31:49,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-16 20:31:49,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038153707] [2021-11-16 20:31:49,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:31:49,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 20:31:49,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:49,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 20:31:49,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:31:49,675 INFO L87 Difference]: Start difference. First operand 459 states and 610 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-16 20:31:50,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:50,692 INFO L93 Difference]: Finished difference Result 920 states and 1229 transitions. [2021-11-16 20:31:50,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 20:31:50,692 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 91 [2021-11-16 20:31:50,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:50,694 INFO L225 Difference]: With dead ends: 920 [2021-11-16 20:31:50,694 INFO L226 Difference]: Without dead ends: 504 [2021-11-16 20:31:50,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:31:50,696 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 141 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:50,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 802 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-16 20:31:50,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-11-16 20:31:50,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 484. [2021-11-16 20:31:50,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 352 states have (on average 1.1392045454545454) internal successors, (401), 362 states have internal predecessors, (401), 87 states have call successors, (87), 26 states have call predecessors, (87), 44 states have return successors, (154), 95 states have call predecessors, (154), 86 states have call successors, (154) [2021-11-16 20:31:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 642 transitions. [2021-11-16 20:31:50,722 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 642 transitions. Word has length 91 [2021-11-16 20:31:50,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:50,722 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 642 transitions. [2021-11-16 20:31:50,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-16 20:31:50,723 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 642 transitions. [2021-11-16 20:31:50,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-16 20:31:50,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:50,724 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:50,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-16 20:31:50,724 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:50,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:50,725 INFO L85 PathProgramCache]: Analyzing trace with hash -223113860, now seen corresponding path program 1 times [2021-11-16 20:31:50,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:50,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464634933] [2021-11-16 20:31:50,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:50,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:51,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:51,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:31:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:51,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:31:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:51,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:51,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:31:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:51,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:31:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:51,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:31:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:51,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:31:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-16 20:31:51,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:51,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464634933] [2021-11-16 20:31:51,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464634933] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:31:51,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600548251] [2021-11-16 20:31:51,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:51,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:31:51,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:31:51,572 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:31:51,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-16 20:31:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:51,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 2511 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-16 20:31:51,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:31:51,996 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 19 treesize of output 1 [2021-11-16 20:31:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-16 20:31:53,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:31:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-16 20:31:53,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600548251] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:31:53,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:31:53,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 13] total 38 [2021-11-16 20:31:53,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139959744] [2021-11-16 20:31:53,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:31:53,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-16 20:31:53,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:53,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-16 20:31:53,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-11-16 20:31:53,772 INFO L87 Difference]: Start difference. First operand 484 states and 642 transitions. Second operand has 38 states, 37 states have (on average 4.513513513513513) internal successors, (167), 34 states have internal predecessors, (167), 10 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-16 20:31:59,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:59,331 INFO L93 Difference]: Finished difference Result 709 states and 893 transitions. [2021-11-16 20:31:59,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-16 20:31:59,331 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 4.513513513513513) internal successors, (167), 34 states have internal predecessors, (167), 10 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) Word has length 96 [2021-11-16 20:31:59,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:59,344 INFO L225 Difference]: With dead ends: 709 [2021-11-16 20:31:59,345 INFO L226 Difference]: Without dead ends: 579 [2021-11-16 20:31:59,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 188 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=487, Invalid=3295, Unknown=0, NotChecked=0, Total=3782 [2021-11-16 20:31:59,346 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 448 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 2538 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1855 SdHoareTripleChecker+Invalid, 3163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 2538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 418 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:59,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 1855 Invalid, 3163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 2538 Invalid, 0 Unknown, 418 Unchecked, 4.5s Time] [2021-11-16 20:31:59,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-11-16 20:31:59,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 493. [2021-11-16 20:31:59,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 361 states have (on average 1.1301939058171746) internal successors, (408), 371 states have internal predecessors, (408), 87 states have call successors, (87), 26 states have call predecessors, (87), 44 states have return successors, (143), 95 states have call predecessors, (143), 86 states have call successors, (143) [2021-11-16 20:31:59,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 638 transitions. [2021-11-16 20:31:59,371 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 638 transitions. Word has length 96 [2021-11-16 20:31:59,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:59,372 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 638 transitions. [2021-11-16 20:31:59,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 4.513513513513513) internal successors, (167), 34 states have internal predecessors, (167), 10 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-16 20:31:59,372 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 638 transitions. [2021-11-16 20:31:59,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-16 20:31:59,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:59,373 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:59,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-16 20:31:59,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-16 20:31:59,595 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:59,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:59,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1103427007, now seen corresponding path program 1 times [2021-11-16 20:31:59,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:59,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330263320] [2021-11-16 20:31:59,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:59,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:59,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:31:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:59,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:31:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:59,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:31:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:59,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:59,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:31:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:59,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:31:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:59,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:31:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:59,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:31:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-16 20:31:59,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:59,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330263320] [2021-11-16 20:31:59,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330263320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:31:59,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:31:59,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-16 20:31:59,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708292818] [2021-11-16 20:31:59,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:31:59,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 20:31:59,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:59,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 20:31:59,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:31:59,809 INFO L87 Difference]: Start difference. First operand 493 states and 638 transitions. Second operand has 11 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-16 20:32:00,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:32:00,356 INFO L93 Difference]: Finished difference Result 499 states and 643 transitions. [2021-11-16 20:32:00,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 20:32:00,356 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 98 [2021-11-16 20:32:00,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:32:00,359 INFO L225 Difference]: With dead ends: 499 [2021-11-16 20:32:00,359 INFO L226 Difference]: Without dead ends: 497 [2021-11-16 20:32:00,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-11-16 20:32:00,360 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 116 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:32:00,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1269 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-16 20:32:00,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-11-16 20:32:00,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 492. [2021-11-16 20:32:00,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 361 states have (on average 1.1301939058171746) internal successors, (408), 371 states have internal predecessors, (408), 86 states have call successors, (86), 26 states have call predecessors, (86), 44 states have return successors, (142), 94 states have call predecessors, (142), 85 states have call successors, (142) [2021-11-16 20:32:00,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 636 transitions. [2021-11-16 20:32:00,391 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 636 transitions. Word has length 98 [2021-11-16 20:32:00,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:32:00,391 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 636 transitions. [2021-11-16 20:32:00,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-16 20:32:00,392 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 636 transitions. [2021-11-16 20:32:00,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-16 20:32:00,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:32:00,393 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:32:00,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-16 20:32:00,394 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:32:00,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:32:00,394 INFO L85 PathProgramCache]: Analyzing trace with hash 204523267, now seen corresponding path program 1 times [2021-11-16 20:32:00,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:32:00,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957299544] [2021-11-16 20:32:00,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:32:00,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:32:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:00,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:32:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:00,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:32:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:00,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:32:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:00,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:32:00,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:00,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:32:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:00,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:32:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:00,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:32:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:00,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:32:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-16 20:32:00,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:32:00,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957299544] [2021-11-16 20:32:00,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957299544] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:32:00,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:32:00,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-16 20:32:00,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469773692] [2021-11-16 20:32:00,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:32:00,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-16 20:32:00,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:32:00,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-16 20:32:00,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-11-16 20:32:00,992 INFO L87 Difference]: Start difference. First operand 492 states and 636 transitions. Second operand has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 13 states have internal predecessors, (61), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-16 20:32:03,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:32:03,449 INFO L93 Difference]: Finished difference Result 522 states and 673 transitions. [2021-11-16 20:32:03,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-16 20:32:03,449 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 13 states have internal predecessors, (61), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 98 [2021-11-16 20:32:03,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:32:03,451 INFO L225 Difference]: With dead ends: 522 [2021-11-16 20:32:03,451 INFO L226 Difference]: Without dead ends: 520 [2021-11-16 20:32:03,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-11-16 20:32:03,452 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 205 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 1888 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 2008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:32:03,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 1511 Invalid, 2008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1888 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-16 20:32:03,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-11-16 20:32:03,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 496. [2021-11-16 20:32:03,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 364 states have (on average 1.129120879120879) internal successors, (411), 374 states have internal predecessors, (411), 86 states have call successors, (86), 27 states have call predecessors, (86), 45 states have return successors, (142), 94 states have call predecessors, (142), 85 states have call successors, (142) [2021-11-16 20:32:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 639 transitions. [2021-11-16 20:32:03,493 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 639 transitions. Word has length 98 [2021-11-16 20:32:03,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:32:03,493 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 639 transitions. [2021-11-16 20:32:03,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 13 states have internal predecessors, (61), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-16 20:32:03,494 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 639 transitions. [2021-11-16 20:32:03,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-16 20:32:03,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:32:03,495 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:32:03,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-16 20:32:03,495 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:32:03,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:32:03,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1572301202, now seen corresponding path program 1 times [2021-11-16 20:32:03,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:32:03,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651074144] [2021-11-16 20:32:03,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:32:03,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:32:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:03,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:32:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:03,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:32:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:03,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:32:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:03,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:32:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:03,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:32:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:03,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:32:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:03,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:32:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:03,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:32:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:03,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:32:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:03,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-16 20:32:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:03,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:32:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-16 20:32:03,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:32:03,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651074144] [2021-11-16 20:32:03,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651074144] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:32:03,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:32:03,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-16 20:32:03,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155805195] [2021-11-16 20:32:03,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:32:03,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 20:32:03,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:32:03,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 20:32:03,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:32:03,797 INFO L87 Difference]: Start difference. First operand 496 states and 639 transitions. Second operand has 11 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-16 20:32:05,323 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:32:06,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:32:06,164 INFO L93 Difference]: Finished difference Result 533 states and 701 transitions. [2021-11-16 20:32:06,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-16 20:32:06,165 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 99 [2021-11-16 20:32:06,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:32:06,167 INFO L225 Difference]: With dead ends: 533 [2021-11-16 20:32:06,167 INFO L226 Difference]: Without dead ends: 531 [2021-11-16 20:32:06,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-16 20:32:06,168 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 378 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:32:06,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 560 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-16 20:32:06,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-16 20:32:06,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 503. [2021-11-16 20:32:06,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 369 states have (on average 1.127371273712737) internal successors, (416), 379 states have internal predecessors, (416), 87 states have call successors, (87), 28 states have call predecessors, (87), 46 states have return successors, (143), 95 states have call predecessors, (143), 86 states have call successors, (143) [2021-11-16 20:32:06,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 646 transitions. [2021-11-16 20:32:06,201 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 646 transitions. Word has length 99 [2021-11-16 20:32:06,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:32:06,201 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 646 transitions. [2021-11-16 20:32:06,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-16 20:32:06,202 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 646 transitions. [2021-11-16 20:32:06,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-16 20:32:06,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:32:06,204 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:32:06,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-16 20:32:06,204 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:32:06,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:32:06,204 INFO L85 PathProgramCache]: Analyzing trace with hash 175619793, now seen corresponding path program 1 times [2021-11-16 20:32:06,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:32:06,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255477521] [2021-11-16 20:32:06,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:32:06,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:32:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:06,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:32:06,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:06,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:32:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:06,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:32:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:06,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:32:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:06,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:32:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:06,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:32:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:06,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:32:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:06,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 20:32:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:06,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:32:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:06,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:32:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-16 20:32:06,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:32:06,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255477521] [2021-11-16 20:32:06,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255477521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:32:06,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:32:06,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-16 20:32:06,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119197288] [2021-11-16 20:32:06,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:32:06,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-16 20:32:06,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:32:06,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-16 20:32:06,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-16 20:32:06,595 INFO L87 Difference]: Start difference. First operand 503 states and 646 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 11 states have internal predecessors, (62), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-16 20:32:08,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:32:08,734 INFO L93 Difference]: Finished difference Result 630 states and 787 transitions. [2021-11-16 20:32:08,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-16 20:32:08,735 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 11 states have internal predecessors, (62), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 102 [2021-11-16 20:32:08,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:32:08,737 INFO L225 Difference]: With dead ends: 630 [2021-11-16 20:32:08,737 INFO L226 Difference]: Without dead ends: 521 [2021-11-16 20:32:08,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-11-16 20:32:08,738 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 281 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-16 20:32:08,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 777 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-16 20:32:08,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-11-16 20:32:08,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 500. [2021-11-16 20:32:08,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 366 states have (on average 1.1256830601092895) internal successors, (412), 375 states have internal predecessors, (412), 88 states have call successors, (88), 28 states have call predecessors, (88), 45 states have return successors, (142), 96 states have call predecessors, (142), 86 states have call successors, (142) [2021-11-16 20:32:08,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 642 transitions. [2021-11-16 20:32:08,769 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 642 transitions. Word has length 102 [2021-11-16 20:32:08,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:32:08,769 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 642 transitions. [2021-11-16 20:32:08,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 11 states have internal predecessors, (62), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-16 20:32:08,770 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 642 transitions. [2021-11-16 20:32:08,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-16 20:32:08,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:32:08,772 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:32:08,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-16 20:32:08,772 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:32:08,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:32:08,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2142703970, now seen corresponding path program 1 times [2021-11-16 20:32:08,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:32:08,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643742684] [2021-11-16 20:32:08,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:32:08,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:32:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:09,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:32:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:09,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:32:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:09,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:32:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:09,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:32:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:09,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:32:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:09,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:32:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:09,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:32:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:09,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 20:32:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:09,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:32:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:09,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:32:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-16 20:32:09,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:32:09,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643742684] [2021-11-16 20:32:09,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643742684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:32:09,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:32:09,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-16 20:32:09,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2382219] [2021-11-16 20:32:09,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:32:09,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-16 20:32:09,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:32:09,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-16 20:32:09,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:32:09,260 INFO L87 Difference]: Start difference. First operand 500 states and 642 transitions. Second operand has 13 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-16 20:32:11,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:32:11,828 INFO L93 Difference]: Finished difference Result 532 states and 690 transitions. [2021-11-16 20:32:11,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-16 20:32:11,828 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 108 [2021-11-16 20:32:11,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:32:11,831 INFO L225 Difference]: With dead ends: 532 [2021-11-16 20:32:11,831 INFO L226 Difference]: Without dead ends: 530 [2021-11-16 20:32:11,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-11-16 20:32:11,833 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 225 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:32:11,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 885 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-16 20:32:11,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-16 20:32:11,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 504. [2021-11-16 20:32:11,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 369 states have (on average 1.1246612466124661) internal successors, (415), 378 states have internal predecessors, (415), 88 states have call successors, (88), 29 states have call predecessors, (88), 46 states have return successors, (142), 96 states have call predecessors, (142), 86 states have call successors, (142) [2021-11-16 20:32:11,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 645 transitions. [2021-11-16 20:32:11,876 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 645 transitions. Word has length 108 [2021-11-16 20:32:11,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:32:11,876 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 645 transitions. [2021-11-16 20:32:11,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-16 20:32:11,877 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 645 transitions. [2021-11-16 20:32:11,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-16 20:32:11,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:32:11,878 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:32:11,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-16 20:32:11,879 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:32:11,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:32:11,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1928597217, now seen corresponding path program 1 times [2021-11-16 20:32:11,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:32:11,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565929060] [2021-11-16 20:32:11,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:32:11,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:32:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:11,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:32:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:11,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:32:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:11,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:32:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:11,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 20:32:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:11,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:32:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:12,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:32:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:12,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:32:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:12,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:32:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:12,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:32:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:12,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-16 20:32:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:12,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:32:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:12,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-16 20:32:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:12,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-16 20:32:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:12,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-16 20:32:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-16 20:32:12,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:32:12,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565929060] [2021-11-16 20:32:12,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565929060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:32:12,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:32:12,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-16 20:32:12,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841123786] [2021-11-16 20:32:12,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:32:12,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 20:32:12,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:32:12,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 20:32:12,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:32:12,050 INFO L87 Difference]: Start difference. First operand 504 states and 645 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-16 20:32:13,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:32:13,001 INFO L93 Difference]: Finished difference Result 536 states and 698 transitions. [2021-11-16 20:32:13,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 20:32:13,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 116 [2021-11-16 20:32:13,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:32:13,004 INFO L225 Difference]: With dead ends: 536 [2021-11-16 20:32:13,004 INFO L226 Difference]: Without dead ends: 377 [2021-11-16 20:32:13,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:32:13,005 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 257 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-16 20:32:13,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 365 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-16 20:32:13,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-16 20:32:13,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 342. [2021-11-16 20:32:13,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 250 states have (on average 1.124) internal successors, (281), 257 states have internal predecessors, (281), 59 states have call successors, (59), 21 states have call predecessors, (59), 32 states have return successors, (97), 63 states have call predecessors, (97), 56 states have call successors, (97) [2021-11-16 20:32:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 437 transitions. [2021-11-16 20:32:13,024 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 437 transitions. Word has length 116 [2021-11-16 20:32:13,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:32:13,024 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 437 transitions. [2021-11-16 20:32:13,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-16 20:32:13,025 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 437 transitions. [2021-11-16 20:32:13,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-16 20:32:13,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:32:13,026 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:32:13,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-16 20:32:13,026 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:32:13,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:32:13,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1800394554, now seen corresponding path program 1 times [2021-11-16 20:32:13,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:32:13,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826394823] [2021-11-16 20:32:13,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:32:13,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:32:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:13,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:32:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:13,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:32:13,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:13,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:32:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:13,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:32:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:13,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:32:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:13,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:32:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:13,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:32:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:13,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 20:32:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:13,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:32:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:13,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:32:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:13,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-16 20:32:13,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:13,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-16 20:32:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-16 20:32:13,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:32:13,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826394823] [2021-11-16 20:32:13,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826394823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:32:13,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:32:13,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-16 20:32:13,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567731317] [2021-11-16 20:32:13,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:32:13,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-16 20:32:13,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:32:13,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-16 20:32:13,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-11-16 20:32:13,825 INFO L87 Difference]: Start difference. First operand 342 states and 437 transitions. Second operand has 18 states, 16 states have (on average 3.4375) internal successors, (55), 13 states have internal predecessors, (55), 7 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-16 20:32:15,423 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:32:19,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:32:19,079 INFO L93 Difference]: Finished difference Result 350 states and 448 transitions. [2021-11-16 20:32:19,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-16 20:32:19,080 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.4375) internal successors, (55), 13 states have internal predecessors, (55), 7 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 120 [2021-11-16 20:32:19,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:32:19,081 INFO L225 Difference]: With dead ends: 350 [2021-11-16 20:32:19,081 INFO L226 Difference]: Without dead ends: 307 [2021-11-16 20:32:19,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-11-16 20:32:19,082 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 241 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 1565 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:32:19,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 629 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1565 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-16 20:32:19,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-16 20:32:19,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 203. [2021-11-16 20:32:19,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 149 states have (on average 1.1342281879194631) internal successors, (169), 153 states have internal predecessors, (169), 34 states have call successors, (34), 15 states have call predecessors, (34), 19 states have return successors, (47), 34 states have call predecessors, (47), 32 states have call successors, (47) [2021-11-16 20:32:19,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 250 transitions. [2021-11-16 20:32:19,098 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 250 transitions. Word has length 120 [2021-11-16 20:32:19,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:32:19,099 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 250 transitions. [2021-11-16 20:32:19,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.4375) internal successors, (55), 13 states have internal predecessors, (55), 7 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-16 20:32:19,100 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 250 transitions. [2021-11-16 20:32:19,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-16 20:32:19,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:32:19,101 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:32:19,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-16 20:32:19,101 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:32:19,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:32:19,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2129347606, now seen corresponding path program 1 times [2021-11-16 20:32:19,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:32:19,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234196435] [2021-11-16 20:32:19,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:32:19,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:32:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:19,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:32:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:19,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:32:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:19,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:32:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:19,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:32:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:19,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:32:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:19,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:32:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:19,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:32:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:19,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:32:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:19,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:32:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:19,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:32:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:19,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:32:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:19,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-16 20:32:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-16 20:32:19,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:32:19,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234196435] [2021-11-16 20:32:19,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234196435] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:32:19,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:32:19,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-16 20:32:19,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76447714] [2021-11-16 20:32:19,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:32:19,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 20:32:19,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:32:19,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 20:32:19,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:32:19,331 INFO L87 Difference]: Start difference. First operand 203 states and 250 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-16 20:32:20,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:32:20,019 INFO L93 Difference]: Finished difference Result 343 states and 445 transitions. [2021-11-16 20:32:20,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 20:32:20,019 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 121 [2021-11-16 20:32:20,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:32:20,021 INFO L225 Difference]: With dead ends: 343 [2021-11-16 20:32:20,021 INFO L226 Difference]: Without dead ends: 252 [2021-11-16 20:32:20,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:32:20,022 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 98 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-16 20:32:20,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 508 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-16 20:32:20,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-16 20:32:20,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 207. [2021-11-16 20:32:20,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 152 states have (on average 1.131578947368421) internal successors, (172), 156 states have internal predecessors, (172), 34 states have call successors, (34), 15 states have call predecessors, (34), 20 states have return successors, (48), 35 states have call predecessors, (48), 32 states have call successors, (48) [2021-11-16 20:32:20,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 254 transitions. [2021-11-16 20:32:20,033 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 254 transitions. Word has length 121 [2021-11-16 20:32:20,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:32:20,034 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 254 transitions. [2021-11-16 20:32:20,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-16 20:32:20,034 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 254 transitions. [2021-11-16 20:32:20,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-16 20:32:20,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:32:20,035 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:32:20,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-16 20:32:20,035 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:32:20,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:32:20,036 INFO L85 PathProgramCache]: Analyzing trace with hash 762400777, now seen corresponding path program 1 times [2021-11-16 20:32:20,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:32:20,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594999947] [2021-11-16 20:32:20,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:32:20,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:32:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:20,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:32:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:20,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:32:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:20,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:32:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:20,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:32:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:20,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:32:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:20,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:32:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:20,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:32:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:20,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:32:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:20,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:32:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:20,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:32:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:20,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:32:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:20,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-16 20:32:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:20,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-16 20:32:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-16 20:32:20,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:32:20,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594999947] [2021-11-16 20:32:20,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594999947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:32:20,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:32:20,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-16 20:32:20,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695990703] [2021-11-16 20:32:20,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:32:20,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:32:20,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:32:20,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:32:20,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-16 20:32:20,197 INFO L87 Difference]: Start difference. First operand 207 states and 254 transitions. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 20:32:20,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:32:20,891 INFO L93 Difference]: Finished difference Result 324 states and 409 transitions. [2021-11-16 20:32:20,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-16 20:32:20,891 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 127 [2021-11-16 20:32:20,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:32:20,892 INFO L225 Difference]: With dead ends: 324 [2021-11-16 20:32:20,892 INFO L226 Difference]: Without dead ends: 242 [2021-11-16 20:32:20,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-16 20:32:20,893 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 170 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-16 20:32:20,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 561 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-16 20:32:20,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-16 20:32:20,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 209. [2021-11-16 20:32:20,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 154 states have (on average 1.1233766233766234) internal successors, (173), 158 states have internal predecessors, (173), 34 states have call successors, (34), 15 states have call predecessors, (34), 20 states have return successors, (48), 35 states have call predecessors, (48), 32 states have call successors, (48) [2021-11-16 20:32:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 255 transitions. [2021-11-16 20:32:20,909 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 255 transitions. Word has length 127 [2021-11-16 20:32:20,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:32:20,910 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 255 transitions. [2021-11-16 20:32:20,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 20:32:20,910 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 255 transitions. [2021-11-16 20:32:20,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-16 20:32:20,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:32:20,911 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:32:20,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-16 20:32:20,912 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:32:20,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:32:20,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1682452745, now seen corresponding path program 1 times [2021-11-16 20:32:20,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:32:20,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995844282] [2021-11-16 20:32:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:32:20,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:32:20,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:21,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:32:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:21,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:32:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:21,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:32:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:21,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:32:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:21,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:32:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:21,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:32:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:21,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:32:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:21,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:32:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:21,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:32:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:21,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:32:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:21,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:32:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:21,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-16 20:32:21,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:21,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-16 20:32:21,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-16 20:32:21,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:32:21,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995844282] [2021-11-16 20:32:21,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995844282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:32:21,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:32:21,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-16 20:32:21,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631830277] [2021-11-16 20:32:21,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:32:21,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 20:32:21,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:32:21,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 20:32:21,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:32:21,139 INFO L87 Difference]: Start difference. First operand 209 states and 255 transitions. Second operand has 11 states, 10 states have (on average 6.7) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-16 20:32:23,217 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:32:24,481 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:32:25,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:32:25,144 INFO L93 Difference]: Finished difference Result 256 states and 326 transitions. [2021-11-16 20:32:25,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-16 20:32:25,145 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 127 [2021-11-16 20:32:25,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:32:25,146 INFO L225 Difference]: With dead ends: 256 [2021-11-16 20:32:25,146 INFO L226 Difference]: Without dead ends: 252 [2021-11-16 20:32:25,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-11-16 20:32:25,147 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 200 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 129 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-16 20:32:25,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 730 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 772 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-11-16 20:32:25,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-16 20:32:25,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 214. [2021-11-16 20:32:25,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 157 states have (on average 1.1210191082802548) internal successors, (176), 161 states have internal predecessors, (176), 35 states have call successors, (35), 16 states have call predecessors, (35), 21 states have return successors, (48), 36 states have call predecessors, (48), 33 states have call successors, (48) [2021-11-16 20:32:25,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 259 transitions. [2021-11-16 20:32:25,164 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 259 transitions. Word has length 127 [2021-11-16 20:32:25,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:32:25,165 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 259 transitions. [2021-11-16 20:32:25,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-16 20:32:25,165 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 259 transitions. [2021-11-16 20:32:25,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-16 20:32:25,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:32:25,166 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:32:25,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-16 20:32:25,167 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:32:25,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:32:25,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1955749090, now seen corresponding path program 1 times [2021-11-16 20:32:25,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:32:25,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058981822] [2021-11-16 20:32:25,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:32:25,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:32:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:25,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:32:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:25,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:32:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:25,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:32:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:25,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:32:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:25,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:32:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:25,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:32:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:25,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:32:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:25,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:32:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:25,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:32:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:25,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:32:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:25,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:32:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:25,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:32:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:25,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-16 20:32:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-16 20:32:25,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:32:25,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058981822] [2021-11-16 20:32:25,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058981822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:32:25,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:32:25,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 20:32:25,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836022002] [2021-11-16 20:32:25,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:32:25,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 20:32:25,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:32:25,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 20:32:25,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:32:25,360 INFO L87 Difference]: Start difference. First operand 214 states and 259 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 20:32:26,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:32:26,023 INFO L93 Difference]: Finished difference Result 349 states and 438 transitions. [2021-11-16 20:32:26,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 20:32:26,024 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 128 [2021-11-16 20:32:26,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:32:26,025 INFO L225 Difference]: With dead ends: 349 [2021-11-16 20:32:26,025 INFO L226 Difference]: Without dead ends: 253 [2021-11-16 20:32:26,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-16 20:32:26,025 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 91 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-16 20:32:26,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 649 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-16 20:32:26,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-16 20:32:26,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 215. [2021-11-16 20:32:26,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 158 states have (on average 1.120253164556962) internal successors, (177), 162 states have internal predecessors, (177), 35 states have call successors, (35), 16 states have call predecessors, (35), 21 states have return successors, (48), 36 states have call predecessors, (48), 33 states have call successors, (48) [2021-11-16 20:32:26,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 260 transitions. [2021-11-16 20:32:26,037 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 260 transitions. Word has length 128 [2021-11-16 20:32:26,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:32:26,038 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 260 transitions. [2021-11-16 20:32:26,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 20:32:26,038 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 260 transitions. [2021-11-16 20:32:26,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-16 20:32:26,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:32:26,039 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:32:26,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-16 20:32:26,039 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:32:26,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:32:26,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1110255069, now seen corresponding path program 1 times [2021-11-16 20:32:26,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:32:26,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621237930] [2021-11-16 20:32:26,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:32:26,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:32:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:26,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:32:26,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:26,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:32:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:26,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:32:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:26,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:32:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:26,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:32:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:26,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:32:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:26,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:32:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:26,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:32:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:26,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:32:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:26,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:32:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:26,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:32:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:26,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:32:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:26,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-16 20:32:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-16 20:32:26,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:32:26,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621237930] [2021-11-16 20:32:26,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621237930] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:32:26,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:32:26,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-16 20:32:26,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116680345] [2021-11-16 20:32:26,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:32:26,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 20:32:26,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:32:26,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 20:32:26,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:32:26,226 INFO L87 Difference]: Start difference. First operand 215 states and 260 transitions. Second operand has 10 states, 9 states have (on average 7.444444444444445) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-16 20:32:26,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:32:26,683 INFO L93 Difference]: Finished difference Result 253 states and 316 transitions. [2021-11-16 20:32:26,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 20:32:26,683 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.444444444444445) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 129 [2021-11-16 20:32:26,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:32:26,684 INFO L225 Difference]: With dead ends: 253 [2021-11-16 20:32:26,684 INFO L226 Difference]: Without dead ends: 251 [2021-11-16 20:32:26,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-16 20:32:26,685 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 179 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:32:26,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 808 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-16 20:32:26,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-16 20:32:26,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 220. [2021-11-16 20:32:26,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 161 states have (on average 1.1180124223602483) internal successors, (180), 165 states have internal predecessors, (180), 36 states have call successors, (36), 17 states have call predecessors, (36), 22 states have return successors, (49), 37 states have call predecessors, (49), 34 states have call successors, (49) [2021-11-16 20:32:26,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 265 transitions. [2021-11-16 20:32:26,698 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 265 transitions. Word has length 129 [2021-11-16 20:32:26,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:32:26,698 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 265 transitions. [2021-11-16 20:32:26,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.444444444444445) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-16 20:32:26,698 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 265 transitions. [2021-11-16 20:32:26,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-16 20:32:26,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:32:26,699 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:32:26,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-16 20:32:26,699 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:32:26,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:32:26,699 INFO L85 PathProgramCache]: Analyzing trace with hash 291468943, now seen corresponding path program 1 times [2021-11-16 20:32:26,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:32:26,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713924171] [2021-11-16 20:32:26,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:32:26,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:32:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:26,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:32:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:26,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:32:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:26,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:32:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:26,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:32:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:26,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:32:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:26,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:32:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:26,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:32:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:27,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:32:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:27,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:32:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:27,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:32:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:27,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:32:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:27,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-16 20:32:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:27,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-16 20:32:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:27,225 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-16 20:32:27,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:32:27,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713924171] [2021-11-16 20:32:27,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713924171] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:32:27,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423875771] [2021-11-16 20:32:27,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:32:27,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:32:27,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:32:27,226 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:32:27,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-16 20:32:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:27,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 2647 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-16 20:32:27,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:32:27,681 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 19 treesize of output 1 [2021-11-16 20:32:28,484 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-16 20:32:28,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:32:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-16 20:32:29,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423875771] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:32:29,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:32:29,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 10] total 34 [2021-11-16 20:32:29,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300671447] [2021-11-16 20:32:29,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:32:29,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-16 20:32:29,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:32:29,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-16 20:32:29,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-11-16 20:32:29,072 INFO L87 Difference]: Start difference. First operand 220 states and 265 transitions. Second operand has 34 states, 33 states have (on average 5.636363636363637) internal successors, (186), 30 states have internal predecessors, (186), 9 states have call successors, (37), 9 states have call predecessors, (37), 8 states have return successors, (34), 7 states have call predecessors, (34), 8 states have call successors, (34) [2021-11-16 20:32:31,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:32:31,918 INFO L93 Difference]: Finished difference Result 276 states and 324 transitions. [2021-11-16 20:32:31,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-16 20:32:31,918 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 5.636363636363637) internal successors, (186), 30 states have internal predecessors, (186), 9 states have call successors, (37), 9 states have call predecessors, (37), 8 states have return successors, (34), 7 states have call predecessors, (34), 8 states have call successors, (34) Word has length 131 [2021-11-16 20:32:31,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:32:31,919 INFO L225 Difference]: With dead ends: 276 [2021-11-16 20:32:31,919 INFO L226 Difference]: Without dead ends: 251 [2021-11-16 20:32:31,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 267 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=446, Invalid=2416, Unknown=0, NotChecked=0, Total=2862 [2021-11-16 20:32:31,921 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 509 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 1813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:32:31,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 922 Invalid, 1813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1333 Invalid, 0 Unknown, 321 Unchecked, 2.2s Time] [2021-11-16 20:32:31,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-16 20:32:31,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 233. [2021-11-16 20:32:31,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 171 states have (on average 1.1111111111111112) internal successors, (190), 176 states have internal predecessors, (190), 36 states have call successors, (36), 19 states have call predecessors, (36), 25 states have return successors, (52), 37 states have call predecessors, (52), 34 states have call successors, (52) [2021-11-16 20:32:31,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 278 transitions. [2021-11-16 20:32:31,937 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 278 transitions. Word has length 131 [2021-11-16 20:32:31,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:32:31,937 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 278 transitions. [2021-11-16 20:32:31,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 5.636363636363637) internal successors, (186), 30 states have internal predecessors, (186), 9 states have call successors, (37), 9 states have call predecessors, (37), 8 states have return successors, (34), 7 states have call predecessors, (34), 8 states have call successors, (34) [2021-11-16 20:32:31,938 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 278 transitions. [2021-11-16 20:32:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-16 20:32:31,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:32:31,939 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:32:31,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-16 20:32:32,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:32:32,140 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:32:32,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:32:32,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1460059221, now seen corresponding path program 1 times [2021-11-16 20:32:32,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:32:32,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306462146] [2021-11-16 20:32:32,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:32:32,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:32:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:32,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:32:32,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:32,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:32:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:32,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:32:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:32,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:32:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:32,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:32:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:32,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:32:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:32,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:32:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:32,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:32:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:32,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:32:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:32,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:32:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:32,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:32:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:32,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-16 20:32:32,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:32,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-16 20:32:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 14 proven. 23 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-16 20:32:32,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:32:32,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306462146] [2021-11-16 20:32:32,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306462146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:32:32,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035297626] [2021-11-16 20:32:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:32:32,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:32:32,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:32:32,507 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:32:32,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-16 20:32:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:32,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 2644 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-16 20:32:32,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:32:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 39 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-16 20:32:34,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:32:43,757 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-16 20:32:43,757 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 39 treesize of output 1 [2021-11-16 20:32:43,989 INFO L354 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2021-11-16 20:32:43,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-11-16 20:32:44,128 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-16 20:32:44,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035297626] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:32:44,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:32:44,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 43 [2021-11-16 20:32:44,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988941623] [2021-11-16 20:32:44,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:32:44,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-16 20:32:44,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:32:44,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-16 20:32:44,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1635, Unknown=0, NotChecked=0, Total=1806 [2021-11-16 20:32:44,131 INFO L87 Difference]: Start difference. First operand 233 states and 278 transitions. Second operand has 43 states, 43 states have (on average 4.744186046511628) internal successors, (204), 37 states have internal predecessors, (204), 9 states have call successors, (38), 11 states have call predecessors, (38), 9 states have return successors, (34), 9 states have call predecessors, (34), 8 states have call successors, (34) [2021-11-16 20:32:55,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:32:55,463 INFO L93 Difference]: Finished difference Result 489 states and 634 transitions. [2021-11-16 20:32:55,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-16 20:32:55,464 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.744186046511628) internal successors, (204), 37 states have internal predecessors, (204), 9 states have call successors, (38), 11 states have call predecessors, (38), 9 states have return successors, (34), 9 states have call predecessors, (34), 8 states have call successors, (34) Word has length 131 [2021-11-16 20:32:55,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:32:55,465 INFO L225 Difference]: With dead ends: 489 [2021-11-16 20:32:55,465 INFO L226 Difference]: Without dead ends: 466 [2021-11-16 20:32:55,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 257 SyntacticMatches, 15 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2049 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=1147, Invalid=6163, Unknown=0, NotChecked=0, Total=7310 [2021-11-16 20:32:55,467 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 488 mSDsluCounter, 1941 mSDsCounter, 0 mSdLazyCounter, 4723 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 2154 SdHoareTripleChecker+Invalid, 5987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 4723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1015 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2021-11-16 20:32:55,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 2154 Invalid, 5987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 4723 Invalid, 0 Unknown, 1015 Unchecked, 8.8s Time] [2021-11-16 20:32:55,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-16 20:32:55,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 381. [2021-11-16 20:32:55,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 285 states have (on average 1.1122807017543859) internal successors, (317), 288 states have internal predecessors, (317), 62 states have call successors, (62), 26 states have call predecessors, (62), 33 states have return successors, (97), 66 states have call predecessors, (97), 60 states have call successors, (97) [2021-11-16 20:32:55,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 476 transitions. [2021-11-16 20:32:55,491 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 476 transitions. Word has length 131 [2021-11-16 20:32:55,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:32:55,492 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 476 transitions. [2021-11-16 20:32:55,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.744186046511628) internal successors, (204), 37 states have internal predecessors, (204), 9 states have call successors, (38), 11 states have call predecessors, (38), 9 states have return successors, (34), 9 states have call predecessors, (34), 8 states have call successors, (34) [2021-11-16 20:32:55,492 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 476 transitions. [2021-11-16 20:32:55,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-16 20:32:55,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:32:55,493 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:32:55,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-16 20:32:55,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:32:55,711 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:32:55,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:32:55,712 INFO L85 PathProgramCache]: Analyzing trace with hash 2079477013, now seen corresponding path program 1 times [2021-11-16 20:32:55,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:32:55,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119510984] [2021-11-16 20:32:55,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:32:55,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:32:56,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:56,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:32:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:56,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:32:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:56,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:32:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:56,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:32:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:56,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:32:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:56,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:32:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:56,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:32:56,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:56,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:32:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:56,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:32:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:56,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:32:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:56,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:32:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:56,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-16 20:32:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:56,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-16 20:32:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-16 20:32:56,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:32:56,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119510984] [2021-11-16 20:32:56,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119510984] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:32:56,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738722036] [2021-11-16 20:32:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:32:56,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:32:56,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:32:56,665 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:32:56,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-16 20:32:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:32:57,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 2654 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-16 20:32:57,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:32:57,204 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 19 treesize of output 1 [2021-11-16 20:32:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 58 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-16 20:32:58,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:33:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-16 20:33:01,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738722036] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:33:01,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:33:01,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 12] total 38 [2021-11-16 20:33:01,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688754518] [2021-11-16 20:33:01,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:33:01,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-16 20:33:01,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:33:01,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-16 20:33:01,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1270, Unknown=1, NotChecked=0, Total=1406 [2021-11-16 20:33:01,485 INFO L87 Difference]: Start difference. First operand 381 states and 476 transitions. Second operand has 38 states, 37 states have (on average 4.891891891891892) internal successors, (181), 34 states have internal predecessors, (181), 8 states have call successors, (37), 9 states have call predecessors, (37), 9 states have return successors, (34), 6 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-16 20:33:03,813 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:33:10,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:33:10,436 INFO L93 Difference]: Finished difference Result 477 states and 590 transitions. [2021-11-16 20:33:10,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-16 20:33:10,436 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 4.891891891891892) internal successors, (181), 34 states have internal predecessors, (181), 8 states have call successors, (37), 9 states have call predecessors, (37), 9 states have return successors, (34), 6 states have call predecessors, (34), 7 states have call successors, (34) Word has length 131 [2021-11-16 20:33:10,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:33:10,438 INFO L225 Difference]: With dead ends: 477 [2021-11-16 20:33:10,438 INFO L226 Difference]: Without dead ends: 465 [2021-11-16 20:33:10,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 266 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=539, Invalid=3492, Unknown=1, NotChecked=0, Total=4032 [2021-11-16 20:33:10,439 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 380 mSDsluCounter, 1152 mSDsCounter, 0 mSdLazyCounter, 1778 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 2482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 587 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:33:10,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 1300 Invalid, 2482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1778 Invalid, 0 Unknown, 587 Unchecked, 7.4s Time] [2021-11-16 20:33:10,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-11-16 20:33:10,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 407. [2021-11-16 20:33:10,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 306 states have (on average 1.1045751633986929) internal successors, (338), 309 states have internal predecessors, (338), 65 states have call successors, (65), 28 states have call predecessors, (65), 35 states have return successors, (105), 69 states have call predecessors, (105), 63 states have call successors, (105) [2021-11-16 20:33:10,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 508 transitions. [2021-11-16 20:33:10,463 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 508 transitions. Word has length 131 [2021-11-16 20:33:10,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:33:10,463 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 508 transitions. [2021-11-16 20:33:10,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 4.891891891891892) internal successors, (181), 34 states have internal predecessors, (181), 8 states have call successors, (37), 9 states have call predecessors, (37), 9 states have return successors, (34), 6 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-16 20:33:10,463 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 508 transitions. [2021-11-16 20:33:10,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-16 20:33:10,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:33:10,464 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-16 20:33:10,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-16 20:33:10,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:33:10,683 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:33:10,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:33:10,684 INFO L85 PathProgramCache]: Analyzing trace with hash 367115802, now seen corresponding path program 1 times [2021-11-16 20:33:10,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:33:10,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987491696] [2021-11-16 20:33:10,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:33:10,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:33:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:10,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:33:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:10,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:33:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:10,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:33:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:10,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:33:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:10,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:33:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:10,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:33:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:10,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:33:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:10,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:33:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:10,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:33:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:10,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:33:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:10,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:33:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:10,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-16 20:33:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:10,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-16 20:33:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:10,875 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-16 20:33:10,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:33:10,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987491696] [2021-11-16 20:33:10,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987491696] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:33:10,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:33:10,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-16 20:33:10,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016860541] [2021-11-16 20:33:10,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:33:10,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-16 20:33:10,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:33:10,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-16 20:33:10,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:33:10,876 INFO L87 Difference]: Start difference. First operand 407 states and 508 transitions. Second operand has 13 states, 12 states have (on average 5.583333333333333) internal successors, (67), 8 states have internal predecessors, (67), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-16 20:33:12,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:33:12,174 INFO L93 Difference]: Finished difference Result 491 states and 650 transitions. [2021-11-16 20:33:12,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-16 20:33:12,174 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.583333333333333) internal successors, (67), 8 states have internal predecessors, (67), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 133 [2021-11-16 20:33:12,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:33:12,176 INFO L225 Difference]: With dead ends: 491 [2021-11-16 20:33:12,176 INFO L226 Difference]: Without dead ends: 455 [2021-11-16 20:33:12,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-11-16 20:33:12,177 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 199 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:33:12,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 984 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-16 20:33:12,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-11-16 20:33:12,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 386. [2021-11-16 20:33:12,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 285 states have (on average 1.1017543859649124) internal successors, (314), 289 states have internal predecessors, (314), 65 states have call successors, (65), 27 states have call predecessors, (65), 35 states have return successors, (103), 69 states have call predecessors, (103), 63 states have call successors, (103) [2021-11-16 20:33:12,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 482 transitions. [2021-11-16 20:33:12,206 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 482 transitions. Word has length 133 [2021-11-16 20:33:12,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:33:12,206 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 482 transitions. [2021-11-16 20:33:12,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.583333333333333) internal successors, (67), 8 states have internal predecessors, (67), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-16 20:33:12,206 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 482 transitions. [2021-11-16 20:33:12,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-16 20:33:12,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:33:12,208 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:33:12,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-16 20:33:12,208 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:33:12,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:33:12,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1068180380, now seen corresponding path program 1 times [2021-11-16 20:33:12,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:33:12,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530302048] [2021-11-16 20:33:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:33:12,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:33:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:12,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:33:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:12,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:33:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:12,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:33:12,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:12,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:33:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:12,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:33:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:12,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:33:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:12,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:33:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:12,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:33:12,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:12,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:33:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:12,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:33:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:12,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:33:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:12,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-16 20:33:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:12,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-16 20:33:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-16 20:33:12,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:33:12,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530302048] [2021-11-16 20:33:12,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530302048] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:33:12,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036064762] [2021-11-16 20:33:12,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:33:12,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:33:12,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:33:12,600 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:33:12,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-16 20:33:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:12,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 2654 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-16 20:33:12,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:33:13,046 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 [2021-11-16 20:33:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 42 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-16 20:33:14,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:33:15,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-11-16 20:33:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 35 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-16 20:33:15,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036064762] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:33:15,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:33:15,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27, 21] total 59 [2021-11-16 20:33:15,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94146417] [2021-11-16 20:33:15,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:33:15,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-16 20:33:15,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:33:15,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-16 20:33:15,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3238, Unknown=0, NotChecked=0, Total=3422 [2021-11-16 20:33:15,644 INFO L87 Difference]: Start difference. First operand 386 states and 482 transitions. Second operand has 59 states, 55 states have (on average 3.9272727272727272) internal successors, (216), 45 states have internal predecessors, (216), 14 states have call successors, (43), 13 states have call predecessors, (43), 13 states have return successors, (37), 16 states have call predecessors, (37), 11 states have call successors, (37) [2021-11-16 20:33:21,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:33:21,332 INFO L93 Difference]: Finished difference Result 470 states and 575 transitions. [2021-11-16 20:33:21,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-16 20:33:21,332 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 55 states have (on average 3.9272727272727272) internal successors, (216), 45 states have internal predecessors, (216), 14 states have call successors, (43), 13 states have call predecessors, (43), 13 states have return successors, (37), 16 states have call predecessors, (37), 11 states have call successors, (37) Word has length 133 [2021-11-16 20:33:21,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:33:21,334 INFO L225 Difference]: With dead ends: 470 [2021-11-16 20:33:21,334 INFO L226 Difference]: Without dead ends: 408 [2021-11-16 20:33:21,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 242 SyntacticMatches, 13 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2703 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=642, Invalid=10070, Unknown=0, NotChecked=0, Total=10712 [2021-11-16 20:33:21,336 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 419 mSDsluCounter, 2907 mSDsCounter, 0 mSdLazyCounter, 3461 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 3074 SdHoareTripleChecker+Invalid, 4298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 3461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 570 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:33:21,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 3074 Invalid, 4298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 3461 Invalid, 0 Unknown, 570 Unchecked, 4.1s Time] [2021-11-16 20:33:21,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-11-16 20:33:21,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 344. [2021-11-16 20:33:21,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 253 states have (on average 1.1027667984189724) internal successors, (279), 259 states have internal predecessors, (279), 57 states have call successors, (57), 24 states have call predecessors, (57), 33 states have return successors, (83), 60 states have call predecessors, (83), 55 states have call successors, (83) [2021-11-16 20:33:21,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 419 transitions. [2021-11-16 20:33:21,363 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 419 transitions. Word has length 133 [2021-11-16 20:33:21,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:33:21,363 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 419 transitions. [2021-11-16 20:33:21,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 55 states have (on average 3.9272727272727272) internal successors, (216), 45 states have internal predecessors, (216), 14 states have call successors, (43), 13 states have call predecessors, (43), 13 states have return successors, (37), 16 states have call predecessors, (37), 11 states have call successors, (37) [2021-11-16 20:33:21,364 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 419 transitions. [2021-11-16 20:33:21,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-16 20:33:21,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:33:21,365 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:33:21,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-16 20:33:21,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:33:21,583 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:33:21,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:33:21,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1181223269, now seen corresponding path program 1 times [2021-11-16 20:33:21,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:33:21,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697161396] [2021-11-16 20:33:21,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:33:21,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:33:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:21,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:33:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:21,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:33:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:21,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:33:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:21,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:33:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:21,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:33:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:21,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:33:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:21,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:33:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:21,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:33:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:21,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:33:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:21,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:33:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:21,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:33:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:21,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:33:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:21,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-16 20:33:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-16 20:33:21,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:33:21,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697161396] [2021-11-16 20:33:21,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697161396] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:33:21,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:33:21,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-16 20:33:21,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657227506] [2021-11-16 20:33:21,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:33:21,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 20:33:21,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:33:21,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 20:33:21,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:33:21,789 INFO L87 Difference]: Start difference. First operand 344 states and 419 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 4 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-16 20:33:22,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:33:22,137 INFO L93 Difference]: Finished difference Result 494 states and 609 transitions. [2021-11-16 20:33:22,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 20:33:22,138 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 4 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 133 [2021-11-16 20:33:22,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:33:22,139 INFO L225 Difference]: With dead ends: 494 [2021-11-16 20:33:22,139 INFO L226 Difference]: Without dead ends: 334 [2021-11-16 20:33:22,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:33:22,140 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 164 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 20:33:22,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 411 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-16 20:33:22,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-16 20:33:22,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 328. [2021-11-16 20:33:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 243 states have (on average 1.0823045267489713) internal successors, (263), 249 states have internal predecessors, (263), 52 states have call successors, (52), 23 states have call predecessors, (52), 32 states have return successors, (78), 55 states have call predecessors, (78), 50 states have call successors, (78) [2021-11-16 20:33:22,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 393 transitions. [2021-11-16 20:33:22,168 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 393 transitions. Word has length 133 [2021-11-16 20:33:22,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:33:22,169 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 393 transitions. [2021-11-16 20:33:22,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 4 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-16 20:33:22,169 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 393 transitions. [2021-11-16 20:33:22,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-16 20:33:22,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:33:22,181 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:33:22,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-16 20:33:22,181 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:33:22,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:33:22,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1709701502, now seen corresponding path program 1 times [2021-11-16 20:33:22,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:33:22,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183764168] [2021-11-16 20:33:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:33:22,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:33:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:22,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:33:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:22,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:33:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:22,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:33:22,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:22,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:33:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:22,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:33:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:22,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:33:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:22,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:33:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:22,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:33:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:22,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:33:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:22,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:33:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:22,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:33:22,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:22,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:33:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:22,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-16 20:33:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:22,576 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-16 20:33:22,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:33:22,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183764168] [2021-11-16 20:33:22,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183764168] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:33:22,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:33:22,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-16 20:33:22,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360173284] [2021-11-16 20:33:22,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:33:22,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-16 20:33:22,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:33:22,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-16 20:33:22,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-11-16 20:33:22,578 INFO L87 Difference]: Start difference. First operand 328 states and 393 transitions. Second operand has 15 states, 14 states have (on average 4.714285714285714) internal successors, (66), 11 states have internal predecessors, (66), 8 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2021-11-16 20:33:23,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:33:23,853 INFO L93 Difference]: Finished difference Result 456 states and 555 transitions. [2021-11-16 20:33:23,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-16 20:33:23,853 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.714285714285714) internal successors, (66), 11 states have internal predecessors, (66), 8 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) Word has length 134 [2021-11-16 20:33:23,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:33:23,854 INFO L225 Difference]: With dead ends: 456 [2021-11-16 20:33:23,854 INFO L226 Difference]: Without dead ends: 318 [2021-11-16 20:33:23,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-11-16 20:33:23,855 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 195 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:33:23,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 780 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-16 20:33:23,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-16 20:33:23,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2021-11-16 20:33:23,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 234 states have (on average 1.0769230769230769) internal successors, (252), 242 states have internal predecessors, (252), 52 states have call successors, (52), 23 states have call predecessors, (52), 31 states have return successors, (75), 52 states have call predecessors, (75), 50 states have call successors, (75) [2021-11-16 20:33:23,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 379 transitions. [2021-11-16 20:33:23,889 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 379 transitions. Word has length 134 [2021-11-16 20:33:23,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:33:23,890 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 379 transitions. [2021-11-16 20:33:23,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.714285714285714) internal successors, (66), 11 states have internal predecessors, (66), 8 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2021-11-16 20:33:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 379 transitions. [2021-11-16 20:33:23,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-16 20:33:23,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:33:23,891 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:33:23,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-11-16 20:33:23,891 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:33:23,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:33:23,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1572439748, now seen corresponding path program 1 times [2021-11-16 20:33:23,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:33:23,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637032900] [2021-11-16 20:33:23,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:33:23,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:33:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:24,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:33:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:24,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:33:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:24,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:33:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:24,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:33:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:24,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:33:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:24,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:33:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:24,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:33:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:24,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:33:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:24,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:33:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:24,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:33:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:24,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:33:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:24,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:33:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:24,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-16 20:33:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-16 20:33:24,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:33:24,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637032900] [2021-11-16 20:33:24,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637032900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:33:24,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247020788] [2021-11-16 20:33:24,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:33:24,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:33:24,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:33:24,487 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:33:24,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-16 20:33:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:24,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 2680 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-16 20:33:24,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:33:24,964 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 28 treesize of output 24 [2021-11-16 20:33:29,409 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-16 20:33:29,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:33:29,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247020788] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:33:29,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:33:29,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [21] total 28 [2021-11-16 20:33:29,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452030732] [2021-11-16 20:33:29,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:33:29,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:33:29,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:33:29,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:33:29,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=672, Unknown=2, NotChecked=0, Total=756 [2021-11-16 20:33:29,410 INFO L87 Difference]: Start difference. First operand 318 states and 379 transitions. Second operand has 9 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-16 20:33:29,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:33:29,524 INFO L93 Difference]: Finished difference Result 429 states and 504 transitions. [2021-11-16 20:33:29,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 20:33:29,524 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 134 [2021-11-16 20:33:29,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:33:29,537 INFO L225 Difference]: With dead ends: 429 [2021-11-16 20:33:29,537 INFO L226 Difference]: Without dead ends: 334 [2021-11-16 20:33:29,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=99, Invalid=829, Unknown=2, NotChecked=0, Total=930 [2021-11-16 20:33:29,538 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 35 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:33:29,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 793 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 5 Invalid, 0 Unknown, 64 Unchecked, 0.0s Time] [2021-11-16 20:33:29,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-16 20:33:29,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 329. [2021-11-16 20:33:29,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 244 states have (on average 1.0778688524590163) internal successors, (263), 252 states have internal predecessors, (263), 52 states have call successors, (52), 24 states have call predecessors, (52), 32 states have return successors, (75), 52 states have call predecessors, (75), 50 states have call successors, (75) [2021-11-16 20:33:29,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 390 transitions. [2021-11-16 20:33:29,560 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 390 transitions. Word has length 134 [2021-11-16 20:33:29,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:33:29,561 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 390 transitions. [2021-11-16 20:33:29,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-16 20:33:29,561 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 390 transitions. [2021-11-16 20:33:29,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-16 20:33:29,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:33:29,562 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:33:29,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-16 20:33:29,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-16 20:33:29,770 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:33:29,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:33:29,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1061311096, now seen corresponding path program 1 times [2021-11-16 20:33:29,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:33:29,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640080243] [2021-11-16 20:33:29,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:33:29,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:33:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:29,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:33:29,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:29,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:33:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:29,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:33:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:29,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:33:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:29,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:33:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:29,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:33:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:29,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:33:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:30,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:33:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:30,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:33:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:30,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:33:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:30,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:33:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:30,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:33:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:30,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-16 20:33:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-16 20:33:30,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:33:30,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640080243] [2021-11-16 20:33:30,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640080243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:33:30,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737489118] [2021-11-16 20:33:30,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:33:30,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:33:30,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:33:30,137 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:33:30,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-16 20:33:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:30,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 2672 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-16 20:33:30,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:33:31,087 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 72 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 20:33:31,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:33:31,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-16 20:33:31,496 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-16 20:33:31,496 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 31 treesize of output 26 [2021-11-16 20:33:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-16 20:33:31,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737489118] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:33:31,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:33:31,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 26 [2021-11-16 20:33:31,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948610612] [2021-11-16 20:33:31,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:33:31,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-16 20:33:31,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:33:31,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-16 20:33:31,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-11-16 20:33:31,557 INFO L87 Difference]: Start difference. First operand 329 states and 390 transitions. Second operand has 26 states, 26 states have (on average 6.153846153846154) internal successors, (160), 22 states have internal predecessors, (160), 7 states have call successors, (30), 7 states have call predecessors, (30), 6 states have return successors, (25), 5 states have call predecessors, (25), 7 states have call successors, (25) [2021-11-16 20:33:32,772 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:33:34,292 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:33:36,288 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:33:40,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:33:40,493 INFO L93 Difference]: Finished difference Result 529 states and 632 transitions. [2021-11-16 20:33:40,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-16 20:33:40,494 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.153846153846154) internal successors, (160), 22 states have internal predecessors, (160), 7 states have call successors, (30), 7 states have call predecessors, (30), 6 states have return successors, (25), 5 states have call predecessors, (25), 7 states have call successors, (25) Word has length 134 [2021-11-16 20:33:40,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:33:40,495 INFO L225 Difference]: With dead ends: 529 [2021-11-16 20:33:40,495 INFO L226 Difference]: Without dead ends: 362 [2021-11-16 20:33:40,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 280 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=344, Invalid=1636, Unknown=0, NotChecked=0, Total=1980 [2021-11-16 20:33:40,496 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 265 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 395 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:33:40,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 1174 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1513 Invalid, 0 Unknown, 395 Unchecked, 8.1s Time] [2021-11-16 20:33:40,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-11-16 20:33:40,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 315. [2021-11-16 20:33:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 234 states have (on average 1.0726495726495726) internal successors, (251), 242 states have internal predecessors, (251), 48 states have call successors, (48), 24 states have call predecessors, (48), 32 states have return successors, (74), 48 states have call predecessors, (74), 46 states have call successors, (74) [2021-11-16 20:33:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 373 transitions. [2021-11-16 20:33:40,518 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 373 transitions. Word has length 134 [2021-11-16 20:33:40,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:33:40,518 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 373 transitions. [2021-11-16 20:33:40,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.153846153846154) internal successors, (160), 22 states have internal predecessors, (160), 7 states have call successors, (30), 7 states have call predecessors, (30), 6 states have return successors, (25), 5 states have call predecessors, (25), 7 states have call successors, (25) [2021-11-16 20:33:40,518 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 373 transitions. [2021-11-16 20:33:40,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-16 20:33:40,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:33:40,519 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:33:40,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-16 20:33:40,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-16 20:33:40,735 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:33:40,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:33:40,736 INFO L85 PathProgramCache]: Analyzing trace with hash 845092170, now seen corresponding path program 1 times [2021-11-16 20:33:40,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:33:40,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450980140] [2021-11-16 20:33:40,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:33:40,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:33:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:41,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:33:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:41,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:33:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:41,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:33:41,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:41,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:33:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:41,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:33:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:41,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:33:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:41,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:33:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:41,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:33:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:41,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:33:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:41,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:33:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:41,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:33:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:41,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:33:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:41,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-16 20:33:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 14 proven. 23 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-16 20:33:41,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:33:41,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450980140] [2021-11-16 20:33:41,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450980140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:33:41,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337569398] [2021-11-16 20:33:41,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:33:41,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:33:41,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:33:41,342 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:33:41,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-16 20:33:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:33:41,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 2667 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-16 20:33:41,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:33:42,626 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 23 treesize of output 15 [2021-11-16 20:33:44,652 WARN L860 $PredicateComparison]: unable to prove that (exists ((|can_fail_realloc_#Ultimate.C_realloc_#res#1.base| Int) (|can_fail_realloc_#Ultimate.C_realloc_ptr#1.base| Int)) (and (= |c_#memory_int| (store |c_old(#memory_int)| |can_fail_realloc_#Ultimate.C_realloc_#res#1.base| (select (store |c_old(#memory_int)| |can_fail_realloc_#Ultimate.C_realloc_#res#1.base| (select (store |c_old(#memory_int)| |can_fail_realloc_#Ultimate.C_realloc_#res#1.base| (select (store |c_old(#memory_int)| |can_fail_realloc_#Ultimate.C_realloc_#res#1.base| (select (store |c_old(#memory_int)| |can_fail_realloc_#Ultimate.C_realloc_#res#1.base| (select (store |c_old(#memory_int)| |can_fail_realloc_#Ultimate.C_realloc_#res#1.base| (select |c_old(#memory_int)| |can_fail_realloc_#Ultimate.C_realloc_ptr#1.base|)) |can_fail_realloc_#Ultimate.C_realloc_ptr#1.base|)) |can_fail_realloc_#Ultimate.C_realloc_ptr#1.base|)) |can_fail_realloc_#Ultimate.C_realloc_ptr#1.base|)) |can_fail_realloc_#Ultimate.C_realloc_ptr#1.base|)) |can_fail_realloc_#Ultimate.C_realloc_ptr#1.base|))) (< |can_fail_realloc_#Ultimate.C_realloc_#res#1.base| |c_#StackHeapBarrier|))) is different from true [2021-11-16 20:33:44,719 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-16 20:33:44,720 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 89 [2021-11-16 20:33:44,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:33:44,828 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 37 treesize of output 17 [2021-11-16 20:33:44,856 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 0 case distinctions, treesize of input 41 treesize of output 34 [2021-11-16 20:33:44,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:33:44,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:33:44,859 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 0 case distinctions, treesize of input 24 treesize of output 26 [2021-11-16 20:33:45,430 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 25 proven. 38 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-16 20:33:45,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:33:48,484 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_can_fail_realloc_#Ultimate.C_realloc_ptr#1.base_9| Int) (|v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_12| Int) (|aux_div_aws_byte_buf_reserve_~requested_capacity#1_71| Int) (|aux_div_aux_mod_aws_byte_buf_reserve_~requested_capacity#1_71_82| Int) (|aux_mod_aux_mod_aws_byte_buf_reserve_~requested_capacity#1_71_82| Int) (v_DerPreprocessor_1 Int)) (let ((.cse0 (+ |aux_mod_aux_mod_aws_byte_buf_reserve_~requested_capacity#1_71_82| (* 18446744073709551616 |aux_div_aux_mod_aws_byte_buf_reserve_~requested_capacity#1_71_82|)))) (or (< .cse0 0) (< |aux_mod_aux_mod_aws_byte_buf_reserve_~requested_capacity#1_71_82| 0) (= .cse0 0) (<= |c_#StackHeapBarrier| |v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_12|) (<= (mod (select (store (select (let ((.cse1 (store |c_#memory_int| |v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_12| (select (store |c_#memory_int| |v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_12| (select (store |c_#memory_int| |v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_12| (select (store |c_#memory_int| |v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_12| (select (store |c_#memory_int| |v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_12| (select (store |c_#memory_int| |v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_12| (select |c_#memory_int| |v_can_fail_realloc_#Ultimate.C_realloc_ptr#1.base_9|)) |v_can_fail_realloc_#Ultimate.C_realloc_ptr#1.base_9|)) |v_can_fail_realloc_#Ultimate.C_realloc_ptr#1.base_9|)) |v_can_fail_realloc_#Ultimate.C_realloc_ptr#1.base_9|)) |v_can_fail_realloc_#Ultimate.C_realloc_ptr#1.base_9|)) |v_can_fail_realloc_#Ultimate.C_realloc_ptr#1.base_9|)))) (store .cse1 |c_aws_byte_buf_reserve_aws_mem_realloc_~ptr#1.base| (store (select .cse1 |c_aws_byte_buf_reserve_aws_mem_realloc_~ptr#1.base|) |c_aws_byte_buf_reserve_aws_mem_realloc_~ptr#1.offset| v_DerPreprocessor_1))) |c_aws_byte_buf_reserve_~buffer#1.base|) (+ 16 |c_aws_byte_buf_reserve_~buffer#1.offset|) (+ (+ |aux_mod_aux_mod_aws_byte_buf_reserve_~requested_capacity#1_71_82| (* |aux_div_aux_mod_aws_byte_buf_reserve_~requested_capacity#1_71_82| 18446744073709551616)) (* |aux_div_aws_byte_buf_reserve_~requested_capacity#1_71| 18446744073709551616))) |c_aws_byte_buf_reserve_~buffer#1.offset|) 18446744073709551616) |aux_mod_aux_mod_aws_byte_buf_reserve_~requested_capacity#1_71_82|) (<= 18446744073709551616 .cse0)))) is different from false [2021-11-16 20:33:48,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337569398] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:33:48,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:33:48,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 34 [2021-11-16 20:33:48,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571896861] [2021-11-16 20:33:48,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:33:48,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-16 20:33:48,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:33:48,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-16 20:33:48,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1537, Unknown=2, NotChecked=162, Total=1892 [2021-11-16 20:33:48,488 INFO L87 Difference]: Start difference. First operand 315 states and 373 transitions. Second operand has 34 states, 34 states have (on average 4.0) internal successors, (136), 30 states have internal predecessors, (136), 9 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) [2021-11-16 20:33:51,022 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:33:53,091 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:33:55,673 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:33:56,895 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:33:58,934 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:35:12,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:35:12,678 INFO L93 Difference]: Finished difference Result 521 states and 622 transitions. [2021-11-16 20:35:12,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-16 20:35:12,678 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.0) internal successors, (136), 30 states have internal predecessors, (136), 9 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) Word has length 134 [2021-11-16 20:35:12,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:35:12,679 INFO L225 Difference]: With dead ends: 521 [2021-11-16 20:35:12,680 INFO L226 Difference]: Without dead ends: 344 [2021-11-16 20:35:12,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 153 SyntacticMatches, 17 SemanticMatches, 72 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1562 ImplicationChecksByTransitivity, 77.2s TimeCoverageRelationStatistics Valid=703, Invalid=4382, Unknown=35, NotChecked=282, Total=5402 [2021-11-16 20:35:12,681 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 283 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 2016 mSolverCounterSat, 125 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 3055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2016 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 910 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2021-11-16 20:35:12,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 1317 Invalid, 3055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2016 Invalid, 4 Unknown, 910 Unchecked, 12.5s Time] [2021-11-16 20:35:12,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-16 20:35:12,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 323. [2021-11-16 20:35:12,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 245 states have (on average 1.0693877551020408) internal successors, (262), 251 states have internal predecessors, (262), 46 states have call successors, (46), 25 states have call predecessors, (46), 31 states have return successors, (62), 46 states have call predecessors, (62), 44 states have call successors, (62) [2021-11-16 20:35:12,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 370 transitions. [2021-11-16 20:35:12,701 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 370 transitions. Word has length 134 [2021-11-16 20:35:12,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:35:12,701 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 370 transitions. [2021-11-16 20:35:12,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.0) internal successors, (136), 30 states have internal predecessors, (136), 9 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) [2021-11-16 20:35:12,701 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 370 transitions. [2021-11-16 20:35:12,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-16 20:35:12,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:35:12,702 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:35:12,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-16 20:35:12,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-16 20:35:12,924 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:35:12,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:35:12,924 INFO L85 PathProgramCache]: Analyzing trace with hash 462581892, now seen corresponding path program 1 times [2021-11-16 20:35:12,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:35:12,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678635141] [2021-11-16 20:35:12,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:35:12,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:35:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:12,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:35:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:12,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:35:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:12,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:35:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:12,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:35:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:13,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:35:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:13,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:35:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:13,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:35:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:13,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:35:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:13,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:35:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:13,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:35:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:13,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:35:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:13,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:35:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:13,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-16 20:35:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-16 20:35:13,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:35:13,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678635141] [2021-11-16 20:35:13,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678635141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:35:13,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:35:13,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-16 20:35:13,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740279417] [2021-11-16 20:35:13,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:35:13,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 20:35:13,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:35:13,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 20:35:13,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-16 20:35:13,062 INFO L87 Difference]: Start difference. First operand 323 states and 370 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 20:35:13,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:35:13,438 INFO L93 Difference]: Finished difference Result 407 states and 472 transitions. [2021-11-16 20:35:13,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:35:13,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 134 [2021-11-16 20:35:13,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:35:13,439 INFO L225 Difference]: With dead ends: 407 [2021-11-16 20:35:13,439 INFO L226 Difference]: Without dead ends: 323 [2021-11-16 20:35:13,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:35:13,440 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 131 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 20:35:13,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 339 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-16 20:35:13,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-16 20:35:13,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2021-11-16 20:35:13,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 245 states have (on average 1.0612244897959184) internal successors, (260), 251 states have internal predecessors, (260), 46 states have call successors, (46), 25 states have call predecessors, (46), 31 states have return successors, (62), 46 states have call predecessors, (62), 44 states have call successors, (62) [2021-11-16 20:35:13,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 368 transitions. [2021-11-16 20:35:13,460 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 368 transitions. Word has length 134 [2021-11-16 20:35:13,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:35:13,461 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 368 transitions. [2021-11-16 20:35:13,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 20:35:13,461 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 368 transitions. [2021-11-16 20:35:13,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-16 20:35:13,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:35:13,462 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:35:13,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-11-16 20:35:13,463 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:35:13,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:35:13,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1553937270, now seen corresponding path program 1 times [2021-11-16 20:35:13,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:35:13,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660486342] [2021-11-16 20:35:13,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:35:13,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:35:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:14,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:35:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:14,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:35:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:14,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:35:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:14,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:35:14,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:14,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:35:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:14,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:35:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:14,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:35:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:14,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:35:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:14,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:35:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:14,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:35:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:14,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:35:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:14,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:35:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:14,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-16 20:35:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-16 20:35:14,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:35:14,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660486342] [2021-11-16 20:35:14,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660486342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:35:14,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873962580] [2021-11-16 20:35:14,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:35:14,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:35:14,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:35:14,821 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:35:14,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-16 20:35:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:35:15,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 2677 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-16 20:35:15,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:35:15,282 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 19 treesize of output 1 [2021-11-16 20:35:22,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 20:35:22,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 31 [2021-11-16 20:35:24,822 WARN L860 $PredicateComparison]: unable to prove that (exists ((|can_fail_realloc_#Ultimate.C_realloc_#res#1.base| Int) (|can_fail_realloc_#Ultimate.C_realloc_ptr#1.base| Int)) (and (= |c_#memory_int| (store |c_old(#memory_int)| |can_fail_realloc_#Ultimate.C_realloc_#res#1.base| (select (store |c_old(#memory_int)| |can_fail_realloc_#Ultimate.C_realloc_#res#1.base| (select (store |c_old(#memory_int)| |can_fail_realloc_#Ultimate.C_realloc_#res#1.base| (select (store |c_old(#memory_int)| |can_fail_realloc_#Ultimate.C_realloc_#res#1.base| (select (store |c_old(#memory_int)| |can_fail_realloc_#Ultimate.C_realloc_#res#1.base| (select (store |c_old(#memory_int)| |can_fail_realloc_#Ultimate.C_realloc_#res#1.base| (select |c_old(#memory_int)| |can_fail_realloc_#Ultimate.C_realloc_ptr#1.base|)) |can_fail_realloc_#Ultimate.C_realloc_ptr#1.base|)) |can_fail_realloc_#Ultimate.C_realloc_ptr#1.base|)) |can_fail_realloc_#Ultimate.C_realloc_ptr#1.base|)) |can_fail_realloc_#Ultimate.C_realloc_ptr#1.base|)) |can_fail_realloc_#Ultimate.C_realloc_ptr#1.base|))) (< |can_fail_realloc_#Ultimate.C_realloc_#res#1.base| |c_#StackHeapBarrier|))) is different from true [2021-11-16 20:35:24,874 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-16 20:35:24,875 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 139 treesize of output 119 [2021-11-16 20:35:25,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:35:25,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:35:25,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:35:25,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 20:35:25,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 44 [2021-11-16 20:35:25,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:35:25,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 20:35:25,166 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 1 case distinctions, treesize of input 75 treesize of output 52 [2021-11-16 20:35:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 58 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-16 20:35:25,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:35:32,180 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_16| Int) (v_DerPreprocessor_2 Int) (|v_can_fail_realloc_#Ultimate.C_realloc_ptr#1.base_12| Int)) (or (<= (mod (select (store (select (let ((.cse0 (store |c_#memory_int| |v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_16| (select (store |c_#memory_int| |v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_16| (select (store |c_#memory_int| |v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_16| (select (store |c_#memory_int| |v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_16| (select (store |c_#memory_int| |v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_16| (select (store |c_#memory_int| |v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_16| (select |c_#memory_int| |v_can_fail_realloc_#Ultimate.C_realloc_ptr#1.base_12|)) |v_can_fail_realloc_#Ultimate.C_realloc_ptr#1.base_12|)) |v_can_fail_realloc_#Ultimate.C_realloc_ptr#1.base_12|)) |v_can_fail_realloc_#Ultimate.C_realloc_ptr#1.base_12|)) |v_can_fail_realloc_#Ultimate.C_realloc_ptr#1.base_12|)) |v_can_fail_realloc_#Ultimate.C_realloc_ptr#1.base_12|)))) (store .cse0 |c_aws_byte_buf_reserve_aws_mem_realloc_~ptr#1.base| (store (select .cse0 |c_aws_byte_buf_reserve_aws_mem_realloc_~ptr#1.base|) |c_aws_byte_buf_reserve_aws_mem_realloc_~ptr#1.offset| v_DerPreprocessor_2))) |c_aws_byte_buf_reserve_~buffer#1.base|) (+ 16 |c_aws_byte_buf_reserve_~buffer#1.offset|) |c_aws_byte_buf_reserve_~requested_capacity#1|) |c_aws_byte_buf_reserve_~buffer#1.offset|) 18446744073709551616) (mod |c_aws_byte_buf_reserve_~requested_capacity#1| 18446744073709551616)) (<= |c_#StackHeapBarrier| |v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_16|))) is different from false [2021-11-16 20:35:32,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873962580] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:35:32,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:35:32,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 43 [2021-11-16 20:35:32,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474783006] [2021-11-16 20:35:32,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:35:32,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-16 20:35:32,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:35:32,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-16 20:35:32,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1904, Unknown=5, NotChecked=178, Total=2256 [2021-11-16 20:35:32,183 INFO L87 Difference]: Start difference. First operand 323 states and 368 transitions. Second operand has 43 states, 40 states have (on average 3.3) internal successors, (132), 39 states have internal predecessors, (132), 12 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (22), 11 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-16 20:35:34,207 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:35:36,675 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:35:38,382 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:35:40,924 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:35:42,554 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:36:07,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:36:07,653 INFO L93 Difference]: Finished difference Result 428 states and 484 transitions. [2021-11-16 20:36:07,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-16 20:36:07,654 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 3.3) internal successors, (132), 39 states have internal predecessors, (132), 12 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (22), 11 states have call predecessors, (22), 11 states have call successors, (22) Word has length 134 [2021-11-16 20:36:07,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:36:07,659 INFO L225 Difference]: With dead ends: 428 [2021-11-16 20:36:07,659 INFO L226 Difference]: Without dead ends: 313 [2021-11-16 20:36:07,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 160 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=539, Invalid=5156, Unknown=13, NotChecked=298, Total=6006 [2021-11-16 20:36:07,661 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 317 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 1722 mSolverCounterSat, 134 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 2521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1722 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 663 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:36:07,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 973 Invalid, 2521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1722 Invalid, 2 Unknown, 663 Unchecked, 12.0s Time] [2021-11-16 20:36:07,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-16 20:36:07,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 302. [2021-11-16 20:36:07,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 229 states have (on average 1.056768558951965) internal successors, (242), 236 states have internal predecessors, (242), 43 states have call successors, (43), 22 states have call predecessors, (43), 29 states have return successors, (57), 43 states have call predecessors, (57), 42 states have call successors, (57) [2021-11-16 20:36:07,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 342 transitions. [2021-11-16 20:36:07,681 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 342 transitions. Word has length 134 [2021-11-16 20:36:07,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:36:07,682 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 342 transitions. [2021-11-16 20:36:07,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 3.3) internal successors, (132), 39 states have internal predecessors, (132), 12 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (22), 11 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-16 20:36:07,682 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 342 transitions. [2021-11-16 20:36:07,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-16 20:36:07,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:36:07,683 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:36:07,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-16 20:36:07,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:36:07,887 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:36:07,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:36:07,888 INFO L85 PathProgramCache]: Analyzing trace with hash -641305329, now seen corresponding path program 1 times [2021-11-16 20:36:07,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:36:07,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753566532] [2021-11-16 20:36:07,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:36:07,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:36:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:07,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:36:07,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:07,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:36:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:07,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:36:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:08,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:36:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:08,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:36:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:08,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:36:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:08,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:36:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:08,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:36:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:08,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:36:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:08,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:36:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:08,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:36:08,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:08,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:36:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:08,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-16 20:36:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-16 20:36:08,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:36:08,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753566532] [2021-11-16 20:36:08,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753566532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:36:08,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:36:08,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-16 20:36:08,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822111995] [2021-11-16 20:36:08,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:36:08,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-16 20:36:08,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:36:08,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-16 20:36:08,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-16 20:36:08,088 INFO L87 Difference]: Start difference. First operand 302 states and 342 transitions. Second operand has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 8 states have internal predecessors, (68), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-16 20:36:08,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:36:08,785 INFO L93 Difference]: Finished difference Result 310 states and 350 transitions. [2021-11-16 20:36:08,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 20:36:08,786 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 8 states have internal predecessors, (68), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 136 [2021-11-16 20:36:08,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:36:08,787 INFO L225 Difference]: With dead ends: 310 [2021-11-16 20:36:08,787 INFO L226 Difference]: Without dead ends: 308 [2021-11-16 20:36:08,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-11-16 20:36:08,787 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 88 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-16 20:36:08,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 870 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-16 20:36:08,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-16 20:36:08,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 301. [2021-11-16 20:36:08,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 229 states have (on average 1.056768558951965) internal successors, (242), 236 states have internal predecessors, (242), 42 states have call successors, (42), 22 states have call predecessors, (42), 29 states have return successors, (56), 42 states have call predecessors, (56), 41 states have call successors, (56) [2021-11-16 20:36:08,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 340 transitions. [2021-11-16 20:36:08,806 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 340 transitions. Word has length 136 [2021-11-16 20:36:08,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:36:08,806 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 340 transitions. [2021-11-16 20:36:08,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 8 states have internal predecessors, (68), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-16 20:36:08,807 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 340 transitions. [2021-11-16 20:36:08,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-16 20:36:08,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:36:08,808 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:36:08,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-11-16 20:36:08,808 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:36:08,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:36:08,808 INFO L85 PathProgramCache]: Analyzing trace with hash 59759249, now seen corresponding path program 1 times [2021-11-16 20:36:08,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:36:08,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163200788] [2021-11-16 20:36:08,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:36:08,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:36:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:09,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:36:09,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:09,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:36:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:09,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:36:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:09,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:36:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:09,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:36:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:09,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:36:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:09,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:36:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:09,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:36:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:09,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:36:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:09,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:36:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:09,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:36:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:09,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:36:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:09,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-16 20:36:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-16 20:36:09,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:36:09,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163200788] [2021-11-16 20:36:09,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163200788] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:36:09,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:36:09,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-16 20:36:09,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127552947] [2021-11-16 20:36:09,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:36:09,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-16 20:36:09,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:36:09,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-16 20:36:09,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-11-16 20:36:09,781 INFO L87 Difference]: Start difference. First operand 301 states and 340 transitions. Second operand has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 17 states have internal predecessors, (78), 6 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-16 20:36:11,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:36:11,489 INFO L93 Difference]: Finished difference Result 371 states and 417 transitions. [2021-11-16 20:36:11,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-16 20:36:11,490 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 17 states have internal predecessors, (78), 6 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 136 [2021-11-16 20:36:11,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:36:11,491 INFO L225 Difference]: With dead ends: 371 [2021-11-16 20:36:11,491 INFO L226 Difference]: Without dead ends: 275 [2021-11-16 20:36:11,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2021-11-16 20:36:11,492 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 204 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-16 20:36:11,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 944 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-16 20:36:11,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-16 20:36:11,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 270. [2021-11-16 20:36:11,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 210 states have (on average 1.0523809523809524) internal successors, (221), 215 states have internal predecessors, (221), 34 states have call successors, (34), 21 states have call predecessors, (34), 25 states have return successors, (40), 33 states have call predecessors, (40), 33 states have call successors, (40) [2021-11-16 20:36:11,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 295 transitions. [2021-11-16 20:36:11,507 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 295 transitions. Word has length 136 [2021-11-16 20:36:11,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:36:11,507 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 295 transitions. [2021-11-16 20:36:11,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 17 states have internal predecessors, (78), 6 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-16 20:36:11,507 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 295 transitions. [2021-11-16 20:36:11,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-16 20:36:11,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:36:11,508 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:36:11,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-11-16 20:36:11,508 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:36:11,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:36:11,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1038701812, now seen corresponding path program 1 times [2021-11-16 20:36:11,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:36:11,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700988466] [2021-11-16 20:36:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:36:11,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:36:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:11,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:36:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:11,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:36:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:11,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:36:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:11,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:36:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:11,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:36:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:11,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:36:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:11,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:36:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:12,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 20:36:12,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:12,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:36:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:12,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-16 20:36:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:12,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:36:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:12,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:36:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:12,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:36:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:12,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-16 20:36:12,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:12,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:36:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:12,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-16 20:36:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:12,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-16 20:36:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-16 20:36:12,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:36:12,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700988466] [2021-11-16 20:36:12,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700988466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:36:12,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160816309] [2021-11-16 20:36:12,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:36:12,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:36:12,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:36:12,358 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:36:12,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-16 20:36:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:12,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 2730 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-16 20:36:12,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:36:13,073 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 [2021-11-16 20:36:17,424 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-16 20:36:17,424 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 33 treesize of output 15 [2021-11-16 20:36:17,457 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-16 20:36:17,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:36:17,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160816309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:36:17,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:36:17,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [23] total 32 [2021-11-16 20:36:17,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126919605] [2021-11-16 20:36:17,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:36:17,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 20:36:17,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:36:17,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 20:36:17,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=895, Unknown=2, NotChecked=0, Total=992 [2021-11-16 20:36:17,459 INFO L87 Difference]: Start difference. First operand 270 states and 295 transitions. Second operand has 11 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 7 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2021-11-16 20:36:17,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:36:17,713 INFO L93 Difference]: Finished difference Result 359 states and 394 transitions. [2021-11-16 20:36:17,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 20:36:17,713 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 7 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) Word has length 152 [2021-11-16 20:36:17,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:36:17,714 INFO L225 Difference]: With dead ends: 359 [2021-11-16 20:36:17,714 INFO L226 Difference]: Without dead ends: 262 [2021-11-16 20:36:17,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=108, Invalid=1012, Unknown=2, NotChecked=0, Total=1122 [2021-11-16 20:36:17,715 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 39 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:36:17,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 926 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 83 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2021-11-16 20:36:17,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-16 20:36:17,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2021-11-16 20:36:17,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 203 states have (on average 1.0492610837438423) internal successors, (213), 207 states have internal predecessors, (213), 34 states have call successors, (34), 21 states have call predecessors, (34), 24 states have return successors, (38), 33 states have call predecessors, (38), 33 states have call successors, (38) [2021-11-16 20:36:17,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 285 transitions. [2021-11-16 20:36:17,731 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 285 transitions. Word has length 152 [2021-11-16 20:36:17,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:36:17,731 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 285 transitions. [2021-11-16 20:36:17,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 7 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2021-11-16 20:36:17,731 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 285 transitions. [2021-11-16 20:36:17,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-16 20:36:17,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:36:17,732 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:36:17,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-16 20:36:17,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:36:17,932 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:36:17,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:36:17,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1089141149, now seen corresponding path program 1 times [2021-11-16 20:36:17,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:36:17,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739341455] [2021-11-16 20:36:17,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:36:17,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:36:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:18,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:36:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:18,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:36:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:18,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 20:36:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:18,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:36:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:18,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 20:36:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:18,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:36:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:18,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:36:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:18,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 20:36:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:18,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:36:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:18,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-16 20:36:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:18,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:36:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:18,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:36:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:18,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:36:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:18,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-16 20:36:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:18,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-16 20:36:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:18,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-16 20:36:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:18,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-16 20:36:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-16 20:36:18,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:36:18,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739341455] [2021-11-16 20:36:18,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739341455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:36:18,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145726269] [2021-11-16 20:36:18,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:36:18,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:36:18,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:36:18,795 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:36:18,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-16 20:36:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:36:19,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 2739 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-16 20:36:19,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:36:19,320 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 [2021-11-16 20:36:19,328 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 [2021-11-16 20:36:19,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:36:19,601 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 23 treesize of output 22 [2021-11-16 20:36:19,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:36:19,608 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 23 treesize of output 22 [2021-11-16 20:36:20,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-16 20:36:20,085 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 11 treesize of output 7 [2021-11-16 20:37:39,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: need array sort [2021-11-16 20:37:39,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:37:39,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-16 20:37:39,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875834688] [2021-11-16 20:37:39,146 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-16 20:37:39,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-16 20:37:39,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:37:39,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-16 20:37:39,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1391, Unknown=33, NotChecked=0, Total=1560 [2021-11-16 20:37:39,147 INFO L87 Difference]: Start difference. First operand 262 states and 285 transitions. Second operand has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 19 states have internal predecessors, (79), 9 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2021-11-16 20:37:39,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-16 20:37:39,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 131 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 79.2s TimeCoverageRelationStatistics Valid=136, Invalid=1391, Unknown=33, NotChecked=0, Total=1560 [2021-11-16 20:37:39,148 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:37:39,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:37:39,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-16 20:37:39,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-16 20:37:39,350 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6efa2b56 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-16 20:37:39,354 INFO L158 Benchmark]: Toolchain (without parser) took 444217.96ms. Allocated memory was 90.2MB in the beginning and 314.6MB in the end (delta: 224.4MB). Free memory was 50.1MB in the beginning and 144.2MB in the end (delta: -94.1MB). Peak memory consumption was 131.8MB. Max. memory is 16.1GB. [2021-11-16 20:37:39,354 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 90.2MB. Free memory was 47.0MB in the beginning and 47.0MB in the end (delta: 43.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-16 20:37:39,354 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1731.31ms. Allocated memory was 90.2MB in the beginning and 148.9MB in the end (delta: 58.7MB). Free memory was 50.0MB in the beginning and 83.4MB in the end (delta: -33.5MB). Peak memory consumption was 57.2MB. Max. memory is 16.1GB. [2021-11-16 20:37:39,355 INFO L158 Benchmark]: Boogie Procedure Inliner took 143.36ms. Allocated memory is still 148.9MB. Free memory was 83.4MB in the beginning and 71.6MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-16 20:37:39,355 INFO L158 Benchmark]: Boogie Preprocessor took 59.15ms. Allocated memory is still 148.9MB. Free memory was 71.6MB in the beginning and 64.6MB in the end (delta: 7.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-16 20:37:39,355 INFO L158 Benchmark]: RCFGBuilder took 1251.10ms. Allocated memory is still 148.9MB. Free memory was 64.1MB in the beginning and 89.8MB in the end (delta: -25.8MB). Peak memory consumption was 21.3MB. Max. memory is 16.1GB. [2021-11-16 20:37:39,355 INFO L158 Benchmark]: TraceAbstraction took 441027.74ms. Allocated memory was 148.9MB in the beginning and 314.6MB in the end (delta: 165.7MB). Free memory was 89.8MB in the beginning and 144.2MB in the end (delta: -54.3MB). Peak memory consumption was 111.8MB. Max. memory is 16.1GB. [2021-11-16 20:37:39,356 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 90.2MB. Free memory was 47.0MB in the beginning and 47.0MB in the end (delta: 43.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1731.31ms. Allocated memory was 90.2MB in the beginning and 148.9MB in the end (delta: 58.7MB). Free memory was 50.0MB in the beginning and 83.4MB in the end (delta: -33.5MB). Peak memory consumption was 57.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 143.36ms. Allocated memory is still 148.9MB. Free memory was 83.4MB in the beginning and 71.6MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.15ms. Allocated memory is still 148.9MB. Free memory was 71.6MB in the beginning and 64.6MB in the end (delta: 7.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 1251.10ms. Allocated memory is still 148.9MB. Free memory was 64.1MB in the beginning and 89.8MB in the end (delta: -25.8MB). Peak memory consumption was 21.3MB. Max. memory is 16.1GB. * TraceAbstraction took 441027.74ms. Allocated memory was 148.9MB in the beginning and 314.6MB in the end (delta: 165.7MB). Free memory was 89.8MB in the beginning and 144.2MB in the end (delta: -54.3MB). Peak memory consumption was 111.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6efa2b56 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6efa2b56: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-16 20:37:39,579 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-11-16 20:37:39,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/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_byte_buf_reserve_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.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 de3da06dbfc8734cb93dce42b312357899e8d9cc914b94ba94740650fa2d8258 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 20:37:41,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 20:37:41,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 20:37:41,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 20:37:41,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 20:37:41,263 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 20:37:41,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 20:37:41,269 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 20:37:41,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 20:37:41,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 20:37:41,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 20:37:41,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 20:37:41,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 20:37:41,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 20:37:41,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 20:37:41,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 20:37:41,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 20:37:41,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 20:37:41,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 20:37:41,310 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 20:37:41,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 20:37:41,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 20:37:41,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 20:37:41,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 20:37:41,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 20:37:41,320 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 20:37:41,321 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 20:37:41,322 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 20:37:41,322 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 20:37:41,323 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 20:37:41,323 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 20:37:41,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 20:37:41,325 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 20:37:41,325 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 20:37:41,326 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 20:37:41,327 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 20:37:41,328 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 20:37:41,328 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 20:37:41,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 20:37:41,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 20:37:41,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 20:37:41,333 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-11-16 20:37:41,364 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 20:37:41,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 20:37:41,366 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 20:37:41,366 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 20:37:41,367 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 20:37:41,367 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 20:37:41,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 20:37:41,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 20:37:41,369 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 20:37:41,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 20:37:41,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 20:37:41,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 20:37:41,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 20:37:41,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 20:37:41,370 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-16 20:37:41,370 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-16 20:37:41,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 20:37:41,370 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 20:37:41,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 20:37:41,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 20:37:41,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 20:37:41,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 20:37:41,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 20:37:41,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 20:37:41,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 20:37:41,372 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 20:37:41,372 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-16 20:37:41,372 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-16 20:37:41,372 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 20:37:41,372 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 20:37:41,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 20:37:41,373 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 20:37:41,373 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-16 20:37:41,373 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de3da06dbfc8734cb93dce42b312357899e8d9cc914b94ba94740650fa2d8258 [2021-11-16 20:37:41,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 20:37:41,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 20:37:41,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 20:37:41,699 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 20:37:41,703 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 20:37:41,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i [2021-11-16 20:37:41,759 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb0638c7d/94c15a34db924d5098b8ac68cfa2ef25/FLAGf48e50b7c [2021-11-16 20:37:42,382 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 20:37:42,383 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i [2021-11-16 20:37:42,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb0638c7d/94c15a34db924d5098b8ac68cfa2ef25/FLAGf48e50b7c [2021-11-16 20:37:42,739 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb0638c7d/94c15a34db924d5098b8ac68cfa2ef25 [2021-11-16 20:37:42,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 20:37:42,742 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 20:37:42,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 20:37:42,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 20:37:42,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 20:37:42,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:37:42" (1/1) ... [2021-11-16 20:37:42,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58141122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:37:42, skipping insertion in model container [2021-11-16 20:37:42,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:37:42" (1/1) ... [2021-11-16 20:37:42,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 20:37:42,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 20:37:43,023 WARN L230 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_byte_buf_reserve_harness.i[4494,4507] [2021-11-16 20:37:43,030 WARN L230 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_byte_buf_reserve_harness.i[4554,4567] [2021-11-16 20:37:43,055 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 20:37:43,061 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 20:37:43,784 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:43,785 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:43,785 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:43,785 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:43,786 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:43,794 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:43,798 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:43,807 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:43,807 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:44,059 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 20:37:44,060 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 20:37:44,060 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 20:37:44,061 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 20:37:44,062 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 20:37:44,062 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 20:37:44,062 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 20:37:44,063 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 20:37:44,064 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 20:37:44,065 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 20:37:44,154 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 20:37:44,169 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:44,169 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:44,233 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:44,234 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:44,269 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 20:37:44,328 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 20:37:44,337 WARN L230 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_byte_buf_reserve_harness.i[4494,4507] [2021-11-16 20:37:44,338 WARN L230 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_byte_buf_reserve_harness.i[4554,4567] [2021-11-16 20:37:44,340 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 20:37:44,343 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 20:37:44,369 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:44,372 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:44,375 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:44,376 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:44,377 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:44,381 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:44,382 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:44,383 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:44,383 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:44,416 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 20:37:44,418 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 20:37:44,419 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 20:37:44,420 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 20:37:44,422 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 20:37:44,423 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 20:37:44,423 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 20:37:44,431 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 20:37:44,432 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 20:37:44,433 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 20:37:44,461 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 20:37:44,486 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:44,488 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:44,539 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:44,539 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:37:44,569 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 20:37:44,817 INFO L208 MainTranslator]: Completed translation [2021-11-16 20:37:44,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:37:44 WrapperNode [2021-11-16 20:37:44,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 20:37:44,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 20:37:44,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 20:37:44,819 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 20:37:44,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:37:44" (1/1) ... [2021-11-16 20:37:44,908 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:37:44" (1/1) ... [2021-11-16 20:37:44,986 INFO L137 Inliner]: procedures = 714, calls = 2623, calls flagged for inlining = 60, calls inlined = 10, statements flattened = 949 [2021-11-16 20:37:44,987 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 20:37:44,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 20:37:44,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 20:37:44,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 20:37:44,994 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:37:44" (1/1) ... [2021-11-16 20:37:44,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:37:44" (1/1) ... [2021-11-16 20:37:45,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:37:44" (1/1) ... [2021-11-16 20:37:45,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:37:44" (1/1) ... [2021-11-16 20:37:45,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:37:44" (1/1) ... [2021-11-16 20:37:45,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:37:44" (1/1) ... [2021-11-16 20:37:45,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:37:44" (1/1) ... [2021-11-16 20:37:45,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 20:37:45,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 20:37:45,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 20:37:45,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 20:37:45,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:37:44" (1/1) ... [2021-11-16 20:37:45,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 20:37:45,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:37:45,120 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) [2021-11-16 20:37:45,138 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 [2021-11-16 20:37:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-16 20:37:45,154 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-16 20:37:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 20:37:45,155 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-16 20:37:45,155 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-16 20:37:45,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-16 20:37:45,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-16 20:37:45,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-16 20:37:45,156 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-16 20:37:45,156 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-16 20:37:45,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-16 20:37:45,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-16 20:37:45,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-16 20:37:45,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 20:37:45,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-16 20:37:45,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 20:37:45,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 20:37:45,157 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-16 20:37:45,158 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-16 20:37:45,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-16 20:37:45,158 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_realloc [2021-11-16 20:37:45,158 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_realloc [2021-11-16 20:37:45,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-16 20:37:45,158 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_reserve [2021-11-16 20:37:45,159 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_reserve [2021-11-16 20:37:45,159 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-11-16 20:37:45,159 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-11-16 20:37:45,159 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-16 20:37:45,159 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-16 20:37:45,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 20:37:45,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-16 20:37:45,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-16 20:37:45,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 20:37:45,160 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-16 20:37:45,160 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-16 20:37:45,160 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-16 20:37:45,160 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-16 20:37:45,437 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 20:37:45,438 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 20:37:48,438 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 20:37:48,449 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 20:37:48,449 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-16 20:37:48,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:37:48 BoogieIcfgContainer [2021-11-16 20:37:48,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 20:37:48,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 20:37:48,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 20:37:48,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 20:37:48,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:37:42" (1/3) ... [2021-11-16 20:37:48,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f4b3608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:37:48, skipping insertion in model container [2021-11-16 20:37:48,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:37:44" (2/3) ... [2021-11-16 20:37:48,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f4b3608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:37:48, skipping insertion in model container [2021-11-16 20:37:48,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:37:48" (3/3) ... [2021-11-16 20:37:48,458 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reserve_harness.i [2021-11-16 20:37:48,462 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 20:37:48,462 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 20:37:48,506 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 20:37:48,511 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 [2021-11-16 20:37:48,511 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 20:37:48,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 152 states, 103 states have (on average 1.2912621359223302) internal successors, (133), 103 states have internal predecessors, (133), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-11-16 20:37:48,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-16 20:37:48,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:37:48,538 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:37:48,539 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:37:48,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:37:48,545 INFO L85 PathProgramCache]: Analyzing trace with hash -463635459, now seen corresponding path program 1 times [2021-11-16 20:37:48,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:37:48,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745667837] [2021-11-16 20:37:48,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:37:48,559 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:37:48,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:37:48,573 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:37:48,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-16 20:37:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:49,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 1236 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-16 20:37:49,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:37:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-16 20:37:49,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:37:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-16 20:37:49,400 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:37:49,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745667837] [2021-11-16 20:37:49,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745667837] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-16 20:37:49,401 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:37:49,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-16 20:37:49,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870005869] [2021-11-16 20:37:49,403 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-16 20:37:49,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-16 20:37:49,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:37:49,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-16 20:37:49,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-16 20:37:49,426 INFO L87 Difference]: Start difference. First operand has 152 states, 103 states have (on average 1.2912621359223302) internal successors, (133), 103 states have internal predecessors, (133), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 20:37:49,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:37:49,451 INFO L93 Difference]: Finished difference Result 294 states and 420 transitions. [2021-11-16 20:37:49,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-16 20:37:49,453 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), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2021-11-16 20:37:49,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:37:49,459 INFO L225 Difference]: With dead ends: 294 [2021-11-16 20:37:49,460 INFO L226 Difference]: Without dead ends: 145 [2021-11-16 20:37:49,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-16 20:37:49,465 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:37:49,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:37:49,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-16 20:37:49,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-16 20:37:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 96 states have (on average 1.2395833333333333) internal successors, (119), 97 states have internal predecessors, (119), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-16 20:37:49,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-11-16 20:37:49,511 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 48 [2021-11-16 20:37:49,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:37:49,512 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-11-16 20:37:49,513 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), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 20:37:49,513 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-11-16 20:37:49,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-16 20:37:49,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:37:49,515 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:37:49,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-16 20:37:49,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:37:49,732 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:37:49,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:37:49,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1070415274, now seen corresponding path program 1 times [2021-11-16 20:37:49,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:37:49,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980011071] [2021-11-16 20:37:49,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:37:49,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:37:49,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:37:49,735 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:37:49,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-16 20:37:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:50,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1240 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-16 20:37:50,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:37:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:37:50,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:37:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-16 20:37:50,637 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:37:50,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980011071] [2021-11-16 20:37:50,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980011071] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-16 20:37:50,639 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:37:50,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-16 20:37:50,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142170863] [2021-11-16 20:37:50,641 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-16 20:37:50,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 20:37:50,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:37:50,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 20:37:50,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-16 20:37:50,644 INFO L87 Difference]: Start difference. First operand 145 states and 192 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-16 20:37:50,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:37:50,774 INFO L93 Difference]: Finished difference Result 277 states and 371 transitions. [2021-11-16 20:37:50,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:37:50,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 49 [2021-11-16 20:37:50,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:37:50,783 INFO L225 Difference]: With dead ends: 277 [2021-11-16 20:37:50,783 INFO L226 Difference]: Without dead ends: 148 [2021-11-16 20:37:50,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-16 20:37:50,785 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 37 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:37:50,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 498 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:37:50,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-16 20:37:50,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-11-16 20:37:50,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 98 states have (on average 1.2346938775510203) internal successors, (121), 100 states have internal predecessors, (121), 37 states have call successors, (37), 11 states have call predecessors, (37), 12 states have return successors, (40), 36 states have call predecessors, (40), 36 states have call successors, (40) [2021-11-16 20:37:50,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 198 transitions. [2021-11-16 20:37:50,799 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 198 transitions. Word has length 49 [2021-11-16 20:37:50,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:37:50,800 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 198 transitions. [2021-11-16 20:37:50,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-16 20:37:50,800 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 198 transitions. [2021-11-16 20:37:50,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-16 20:37:50,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:37:50,802 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:37:50,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-16 20:37:51,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:37:51,024 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:37:51,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:37:51,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1139219745, now seen corresponding path program 1 times [2021-11-16 20:37:51,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:37:51,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51863482] [2021-11-16 20:37:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:37:51,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:37:51,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:37:51,027 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:37:51,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-16 20:37:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:51,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-16 20:37:51,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:37:51,723 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 [2021-11-16 20:37:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:37:52,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:37:52,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-11-16 20:37:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-16 20:37:52,989 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:37:52,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51863482] [2021-11-16 20:37:52,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51863482] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-16 20:37:52,989 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:37:52,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 10] imperfect sequences [] total 18 [2021-11-16 20:37:52,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749167177] [2021-11-16 20:37:52,990 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-16 20:37:52,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-16 20:37:52,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:37:52,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-16 20:37:52,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-16 20:37:52,991 INFO L87 Difference]: Start difference. First operand 148 states and 198 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-16 20:37:55,073 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:37:57,076 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:37:57,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:37:57,966 INFO L93 Difference]: Finished difference Result 301 states and 404 transitions. [2021-11-16 20:37:57,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-16 20:37:57,968 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 55 [2021-11-16 20:37:57,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:37:57,970 INFO L225 Difference]: With dead ends: 301 [2021-11-16 20:37:57,970 INFO L226 Difference]: Without dead ends: 162 [2021-11-16 20:37:57,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-11-16 20:37:57,971 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 72 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 26 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1681 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-16 20:37:57,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1681 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 257 Invalid, 2 Unknown, 147 Unchecked, 4.8s Time] [2021-11-16 20:37:57,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-16 20:37:57,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2021-11-16 20:37:57,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 110 states have (on average 1.2363636363636363) internal successors, (136), 112 states have internal predecessors, (136), 37 states have call successors, (37), 12 states have call predecessors, (37), 13 states have return successors, (45), 36 states have call predecessors, (45), 36 states have call successors, (45) [2021-11-16 20:37:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 218 transitions. [2021-11-16 20:37:57,986 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 218 transitions. Word has length 55 [2021-11-16 20:37:57,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:37:57,986 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 218 transitions. [2021-11-16 20:37:57,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-16 20:37:57,987 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 218 transitions. [2021-11-16 20:37:57,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-16 20:37:57,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:37:57,988 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:37:58,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-16 20:37:58,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:37:58,210 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:37:58,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:37:58,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1116587491, now seen corresponding path program 1 times [2021-11-16 20:37:58,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:37:58,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435745526] [2021-11-16 20:37:58,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:37:58,212 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:37:58,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:37:58,213 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:37:58,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-16 20:37:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:58,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 20:37:58,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:37:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:37:58,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:37:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-16 20:37:58,935 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:37:58,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435745526] [2021-11-16 20:37:58,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435745526] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-16 20:37:58,936 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:37:58,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-16 20:37:58,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713041612] [2021-11-16 20:37:58,936 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-16 20:37:58,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 20:37:58,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:37:58,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 20:37:58,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 20:37:58,937 INFO L87 Difference]: Start difference. First operand 161 states and 218 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-16 20:37:58,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:37:58,966 INFO L93 Difference]: Finished difference Result 307 states and 424 transitions. [2021-11-16 20:37:58,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:37:58,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 55 [2021-11-16 20:37:58,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:37:58,970 INFO L225 Difference]: With dead ends: 307 [2021-11-16 20:37:58,970 INFO L226 Difference]: Without dead ends: 171 [2021-11-16 20:37:58,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-16 20:37:58,971 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 20 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:37:58,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 568 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:37:58,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-16 20:37:58,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 159. [2021-11-16 20:37:58,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 108 states have (on average 1.2314814814814814) internal successors, (133), 110 states have internal predecessors, (133), 37 states have call successors, (37), 12 states have call predecessors, (37), 13 states have return successors, (45), 36 states have call predecessors, (45), 36 states have call successors, (45) [2021-11-16 20:37:58,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 215 transitions. [2021-11-16 20:37:58,985 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 215 transitions. Word has length 55 [2021-11-16 20:37:58,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:37:58,985 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 215 transitions. [2021-11-16 20:37:58,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-16 20:37:58,986 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 215 transitions. [2021-11-16 20:37:58,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-16 20:37:58,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:37:58,987 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:37:59,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-16 20:37:59,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:37:59,195 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:37:59,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:37:59,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1232526679, now seen corresponding path program 1 times [2021-11-16 20:37:59,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:37:59,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187833374] [2021-11-16 20:37:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:37:59,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:37:59,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:37:59,198 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:37:59,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-16 20:37:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:59,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 1262 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-16 20:37:59,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:38:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:38:00,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:38:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-16 20:38:00,221 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:38:00,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187833374] [2021-11-16 20:38:00,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187833374] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-16 20:38:00,221 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:38:00,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-16 20:38:00,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714828950] [2021-11-16 20:38:00,221 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-16 20:38:00,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 20:38:00,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:38:00,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 20:38:00,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:38:00,223 INFO L87 Difference]: Start difference. First operand 159 states and 215 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-16 20:38:02,306 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:38:02,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:38:02,759 INFO L93 Difference]: Finished difference Result 326 states and 455 transitions. [2021-11-16 20:38:02,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 20:38:02,760 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2021-11-16 20:38:02,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:38:02,762 INFO L225 Difference]: With dead ends: 326 [2021-11-16 20:38:02,762 INFO L226 Difference]: Without dead ends: 188 [2021-11-16 20:38:02,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-16 20:38:02,763 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 77 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:38:02,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 732 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 1 Unknown, 4 Unchecked, 2.4s Time] [2021-11-16 20:38:02,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-16 20:38:02,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 168. [2021-11-16 20:38:02,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 117 states have (on average 1.2393162393162394) internal successors, (145), 119 states have internal predecessors, (145), 37 states have call successors, (37), 12 states have call predecessors, (37), 13 states have return successors, (45), 36 states have call predecessors, (45), 36 states have call successors, (45) [2021-11-16 20:38:02,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 227 transitions. [2021-11-16 20:38:02,801 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 227 transitions. Word has length 59 [2021-11-16 20:38:02,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:38:02,801 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 227 transitions. [2021-11-16 20:38:02,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-16 20:38:02,801 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 227 transitions. [2021-11-16 20:38:02,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-16 20:38:02,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:38:02,802 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:38:02,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-16 20:38:03,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:38:03,008 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:38:03,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:38:03,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1934126553, now seen corresponding path program 1 times [2021-11-16 20:38:03,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:38:03,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766086633] [2021-11-16 20:38:03,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:38:03,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:38:03,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:38:03,010 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:38:03,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-16 20:38:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:03,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-16 20:38:03,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:38:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-16 20:38:04,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:38:05,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-16 20:38:05,006 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:38:05,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766086633] [2021-11-16 20:38:05,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766086633] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-16 20:38:05,006 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:38:05,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 12] imperfect sequences [] total 19 [2021-11-16 20:38:05,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169950512] [2021-11-16 20:38:05,007 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-16 20:38:05,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-16 20:38:05,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:38:05,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-16 20:38:05,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-16 20:38:05,008 INFO L87 Difference]: Start difference. First operand 168 states and 227 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-16 20:38:07,091 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:38:08,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:38:08,820 INFO L93 Difference]: Finished difference Result 335 states and 469 transitions. [2021-11-16 20:38:08,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-16 20:38:08,821 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 59 [2021-11-16 20:38:08,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:38:08,823 INFO L225 Difference]: With dead ends: 335 [2021-11-16 20:38:08,823 INFO L226 Difference]: Without dead ends: 187 [2021-11-16 20:38:08,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-11-16 20:38:08,824 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 74 mSDsluCounter, 2367 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-16 20:38:08,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 2552 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 341 Invalid, 1 Unknown, 182 Unchecked, 2.7s Time] [2021-11-16 20:38:08,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-16 20:38:08,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 169. [2021-11-16 20:38:08,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 118 states have (on average 1.2203389830508475) internal successors, (144), 120 states have internal predecessors, (144), 37 states have call successors, (37), 12 states have call predecessors, (37), 13 states have return successors, (45), 36 states have call predecessors, (45), 36 states have call successors, (45) [2021-11-16 20:38:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 226 transitions. [2021-11-16 20:38:08,845 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 226 transitions. Word has length 59 [2021-11-16 20:38:08,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:38:08,846 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 226 transitions. [2021-11-16 20:38:08,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-16 20:38:08,846 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 226 transitions. [2021-11-16 20:38:08,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-16 20:38:08,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:38:08,853 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:38:08,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-16 20:38:09,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:38:09,054 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:38:09,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:38:09,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1005612240, now seen corresponding path program 1 times [2021-11-16 20:38:09,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:38:09,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797499061] [2021-11-16 20:38:09,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:38:09,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:38:09,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:38:09,057 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:38:09,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-16 20:38:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:09,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 1264 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 20:38:09,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:38:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:38:09,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:38:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-16 20:38:09,788 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:38:09,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797499061] [2021-11-16 20:38:09,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797499061] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-16 20:38:09,789 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:38:09,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-16 20:38:09,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558906896] [2021-11-16 20:38:09,789 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-16 20:38:09,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 20:38:09,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:38:09,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 20:38:09,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 20:38:09,790 INFO L87 Difference]: Start difference. First operand 169 states and 226 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-16 20:38:09,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:38:09,816 INFO L93 Difference]: Finished difference Result 326 states and 445 transitions. [2021-11-16 20:38:09,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:38:09,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 61 [2021-11-16 20:38:09,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:38:09,818 INFO L225 Difference]: With dead ends: 326 [2021-11-16 20:38:09,818 INFO L226 Difference]: Without dead ends: 178 [2021-11-16 20:38:09,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-16 20:38:09,819 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 34 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:38:09,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 559 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:38:09,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-16 20:38:09,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 165. [2021-11-16 20:38:09,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 114 states have (on average 1.2017543859649122) internal successors, (137), 116 states have internal predecessors, (137), 37 states have call successors, (37), 12 states have call predecessors, (37), 13 states have return successors, (45), 36 states have call predecessors, (45), 36 states have call successors, (45) [2021-11-16 20:38:09,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 219 transitions. [2021-11-16 20:38:09,826 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 219 transitions. Word has length 61 [2021-11-16 20:38:09,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:38:09,827 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 219 transitions. [2021-11-16 20:38:09,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-16 20:38:09,827 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 219 transitions. [2021-11-16 20:38:09,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-16 20:38:09,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:38:09,828 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:38:09,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-16 20:38:10,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:38:10,047 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:38:10,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:38:10,048 INFO L85 PathProgramCache]: Analyzing trace with hash 611245454, now seen corresponding path program 1 times [2021-11-16 20:38:10,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:38:10,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306271758] [2021-11-16 20:38:10,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:38:10,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:38:10,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:38:10,050 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:38:10,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-16 20:38:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:10,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 1261 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-16 20:38:10,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:38:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-16 20:38:10,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:38:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-16 20:38:10,838 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:38:10,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306271758] [2021-11-16 20:38:10,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306271758] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-16 20:38:10,838 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:38:10,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-16 20:38:10,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115755956] [2021-11-16 20:38:10,839 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-16 20:38:10,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 20:38:10,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:38:10,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 20:38:10,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:38:10,840 INFO L87 Difference]: Start difference. First operand 165 states and 219 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (9), 5 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-16 20:38:10,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:38:10,867 INFO L93 Difference]: Finished difference Result 240 states and 306 transitions. [2021-11-16 20:38:10,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 20:38:10,868 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (9), 5 states have call predecessors, (9), 1 states have call successors, (9) Word has length 61 [2021-11-16 20:38:10,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:38:10,869 INFO L225 Difference]: With dead ends: 240 [2021-11-16 20:38:10,869 INFO L226 Difference]: Without dead ends: 168 [2021-11-16 20:38:10,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:38:10,870 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 0 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:38:10,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1129 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:38:10,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-16 20:38:10,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-11-16 20:38:10,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 116 states have (on average 1.1982758620689655) internal successors, (139), 118 states have internal predecessors, (139), 37 states have call successors, (37), 12 states have call predecessors, (37), 14 states have return successors, (46), 37 states have call predecessors, (46), 36 states have call successors, (46) [2021-11-16 20:38:10,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 222 transitions. [2021-11-16 20:38:10,881 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 222 transitions. Word has length 61 [2021-11-16 20:38:10,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:38:10,881 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 222 transitions. [2021-11-16 20:38:10,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (9), 5 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-16 20:38:10,882 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 222 transitions. [2021-11-16 20:38:10,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-16 20:38:10,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:38:10,883 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:38:10,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-16 20:38:11,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:38:11,108 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:38:11,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:38:11,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1909925023, now seen corresponding path program 1 times [2021-11-16 20:38:11,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:38:11,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625465337] [2021-11-16 20:38:11,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:38:11,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:38:11,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:38:11,110 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:38:11,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-16 20:38:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:11,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-16 20:38:11,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:38:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 20:38:11,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:38:11,966 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-16 20:38:11,967 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:38:11,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625465337] [2021-11-16 20:38:11,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625465337] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 20:38:11,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:38:11,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 7 [2021-11-16 20:38:11,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152335799] [2021-11-16 20:38:11,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:38:11,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 20:38:11,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:38:11,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 20:38:11,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:38:11,968 INFO L87 Difference]: Start difference. First operand 168 states and 222 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-16 20:38:12,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:38:12,174 INFO L93 Difference]: Finished difference Result 307 states and 404 transitions. [2021-11-16 20:38:12,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 20:38:12,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 69 [2021-11-16 20:38:12,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:38:12,177 INFO L225 Difference]: With dead ends: 307 [2021-11-16 20:38:12,177 INFO L226 Difference]: Without dead ends: 165 [2021-11-16 20:38:12,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:38:12,180 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 96 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:38:12,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 770 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 20:38:12,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-16 20:38:12,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-11-16 20:38:12,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 114 states have (on average 1.1929824561403508) internal successors, (136), 115 states have internal predecessors, (136), 37 states have call successors, (37), 12 states have call predecessors, (37), 13 states have return successors, (42), 37 states have call predecessors, (42), 36 states have call successors, (42) [2021-11-16 20:38:12,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 215 transitions. [2021-11-16 20:38:12,190 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 215 transitions. Word has length 69 [2021-11-16 20:38:12,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:38:12,191 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 215 transitions. [2021-11-16 20:38:12,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-16 20:38:12,191 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 215 transitions. [2021-11-16 20:38:12,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-16 20:38:12,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:38:12,192 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:38:12,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-16 20:38:12,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:38:12,403 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:38:12,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:38:12,404 INFO L85 PathProgramCache]: Analyzing trace with hash 741336140, now seen corresponding path program 1 times [2021-11-16 20:38:12,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:38:12,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905399446] [2021-11-16 20:38:12,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:38:12,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:38:12,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:38:12,406 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:38:12,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-16 20:38:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:12,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 1284 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-16 20:38:12,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:38:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:38:13,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:38:15,012 INFO L354 Elim1Store]: treesize reduction 51, result has 40.0 percent of original size [2021-11-16 20:38:15,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 45 [2021-11-16 20:38:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 20:38:15,420 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:38:15,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905399446] [2021-11-16 20:38:15,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905399446] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:38:15,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:38:15,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-11-16 20:38:15,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891948277] [2021-11-16 20:38:15,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:38:15,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-16 20:38:15,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:38:15,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-16 20:38:15,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-11-16 20:38:15,422 INFO L87 Difference]: Start difference. First operand 165 states and 215 transitions. Second operand has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 7 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-16 20:38:17,504 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:38:19,507 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:38:21,514 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:38:23,522 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:38:25,531 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:38:27,540 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:38:29,552 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:38:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:38:33,334 INFO L93 Difference]: Finished difference Result 261 states and 339 transitions. [2021-11-16 20:38:33,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-16 20:38:33,334 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 7 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 73 [2021-11-16 20:38:33,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:38:33,336 INFO L225 Difference]: With dead ends: 261 [2021-11-16 20:38:33,336 INFO L226 Difference]: Without dead ends: 220 [2021-11-16 20:38:33,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=155, Invalid=598, Unknown=3, NotChecked=0, Total=756 [2021-11-16 20:38:33,337 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 234 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 78 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 510 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:38:33,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 915 Invalid, 1749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1154 Invalid, 7 Unknown, 510 Unchecked, 17.2s Time] [2021-11-16 20:38:33,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-16 20:38:33,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 203. [2021-11-16 20:38:33,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 140 states have (on average 1.1785714285714286) internal successors, (165), 143 states have internal predecessors, (165), 44 states have call successors, (44), 13 states have call predecessors, (44), 18 states have return successors, (60), 46 states have call predecessors, (60), 43 states have call successors, (60) [2021-11-16 20:38:33,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 269 transitions. [2021-11-16 20:38:33,345 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 269 transitions. Word has length 73 [2021-11-16 20:38:33,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:38:33,346 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 269 transitions. [2021-11-16 20:38:33,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 7 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-16 20:38:33,346 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 269 transitions. [2021-11-16 20:38:33,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-16 20:38:33,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:38:33,356 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:38:33,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-16 20:38:33,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:38:33,568 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:38:33,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:38:33,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1026913100, now seen corresponding path program 1 times [2021-11-16 20:38:33,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:38:33,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046660223] [2021-11-16 20:38:33,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:38:33,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:38:33,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:38:33,572 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:38:33,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-16 20:38:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:34,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-16 20:38:34,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:38:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-16 20:38:35,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:38:36,625 INFO L354 Elim1Store]: treesize reduction 51, result has 40.0 percent of original size [2021-11-16 20:38:36,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 45 [2021-11-16 20:38:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 20:38:36,996 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:38:36,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046660223] [2021-11-16 20:38:36,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046660223] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:38:36,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:38:36,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-11-16 20:38:36,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986122030] [2021-11-16 20:38:36,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:38:36,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-16 20:38:36,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:38:36,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-16 20:38:36,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-11-16 20:38:36,998 INFO L87 Difference]: Start difference. First operand 203 states and 269 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 18 states have internal predecessors, (77), 9 states have call successors, (16), 6 states have call predecessors, (16), 7 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-16 20:38:39,092 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:38:41,104 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:38:43,111 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:38:45,119 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:38:47,127 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:38:49,138 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:38:55,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:38:55,740 INFO L93 Difference]: Finished difference Result 385 states and 512 transitions. [2021-11-16 20:38:55,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-16 20:38:55,740 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 18 states have internal predecessors, (77), 9 states have call successors, (16), 6 states have call predecessors, (16), 7 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 75 [2021-11-16 20:38:55,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:38:55,742 INFO L225 Difference]: With dead ends: 385 [2021-11-16 20:38:55,742 INFO L226 Difference]: Without dead ends: 266 [2021-11-16 20:38:55,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=162, Invalid=766, Unknown=2, NotChecked=0, Total=930 [2021-11-16 20:38:55,743 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 498 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 1890 mSolverCounterSat, 256 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 2629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 1890 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 477 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2021-11-16 20:38:55,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 1037 Invalid, 2629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 1890 Invalid, 6 Unknown, 477 Unchecked, 17.8s Time] [2021-11-16 20:38:55,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-16 20:38:55,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 240. [2021-11-16 20:38:55,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 163 states have (on average 1.196319018404908) internal successors, (195), 167 states have internal predecessors, (195), 58 states have call successors, (58), 14 states have call predecessors, (58), 18 states have return successors, (76), 58 states have call predecessors, (76), 54 states have call successors, (76) [2021-11-16 20:38:55,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 329 transitions. [2021-11-16 20:38:55,756 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 329 transitions. Word has length 75 [2021-11-16 20:38:55,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:38:55,757 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 329 transitions. [2021-11-16 20:38:55,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 18 states have internal predecessors, (77), 9 states have call successors, (16), 6 states have call predecessors, (16), 7 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-16 20:38:55,757 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 329 transitions. [2021-11-16 20:38:55,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-16 20:38:55,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:38:55,758 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:38:55,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-16 20:38:55,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:38:55,963 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:38:55,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:38:55,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1979478232, now seen corresponding path program 1 times [2021-11-16 20:38:55,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:38:55,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576351901] [2021-11-16 20:38:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:38:55,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:38:55,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:38:55,966 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:38:55,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-16 20:38:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:56,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 1288 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-16 20:38:56,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:38:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:38:57,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:38:58,724 INFO L354 Elim1Store]: treesize reduction 39, result has 46.6 percent of original size [2021-11-16 20:38:58,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 45 [2021-11-16 20:38:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 20:38:59,204 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:38:59,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576351901] [2021-11-16 20:38:59,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1576351901] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:38:59,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:38:59,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-11-16 20:38:59,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533790011] [2021-11-16 20:38:59,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:38:59,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-16 20:38:59,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:38:59,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-16 20:38:59,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-11-16 20:38:59,206 INFO L87 Difference]: Start difference. First operand 240 states and 329 transitions. Second operand has 20 states, 20 states have (on average 4.4) internal successors, (88), 20 states have internal predecessors, (88), 7 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-16 20:39:01,294 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:39:03,306 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:39:05,322 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:39:07,325 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:39:09,335 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:39:11,343 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:39:14,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:39:14,020 INFO L93 Difference]: Finished difference Result 375 states and 529 transitions. [2021-11-16 20:39:14,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-16 20:39:14,020 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.4) internal successors, (88), 20 states have internal predecessors, (88), 7 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 77 [2021-11-16 20:39:14,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:39:14,022 INFO L225 Difference]: With dead ends: 375 [2021-11-16 20:39:14,022 INFO L226 Difference]: Without dead ends: 343 [2021-11-16 20:39:14,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2021-11-16 20:39:14,023 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 132 mSDsluCounter, 2503 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 11 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 2749 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 540 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:39:14,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 2749 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 763 Invalid, 6 Unknown, 540 Unchecked, 14.0s Time] [2021-11-16 20:39:14,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-16 20:39:14,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 274. [2021-11-16 20:39:14,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 190 states have (on average 1.1736842105263159) internal successors, (223), 196 states have internal predecessors, (223), 61 states have call successors, (61), 16 states have call predecessors, (61), 22 states have return successors, (95), 61 states have call predecessors, (95), 57 states have call successors, (95) [2021-11-16 20:39:14,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 379 transitions. [2021-11-16 20:39:14,036 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 379 transitions. Word has length 77 [2021-11-16 20:39:14,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:39:14,037 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 379 transitions. [2021-11-16 20:39:14,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.4) internal successors, (88), 20 states have internal predecessors, (88), 7 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-16 20:39:14,037 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 379 transitions. [2021-11-16 20:39:14,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-16 20:39:14,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:39:14,038 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:39:14,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-16 20:39:14,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:39:14,251 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:39:14,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:39:14,251 INFO L85 PathProgramCache]: Analyzing trace with hash -387216362, now seen corresponding path program 1 times [2021-11-16 20:39:14,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:39:14,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585670605] [2021-11-16 20:39:14,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:39:14,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:39:14,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:39:14,254 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:39:14,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-16 20:39:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:39:14,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 1291 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-16 20:39:14,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:39:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:39:16,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:39:20,611 INFO L354 Elim1Store]: treesize reduction 193, result has 45.9 percent of original size [2021-11-16 20:39:20,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 60 treesize of output 179 [2021-11-16 20:39:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 20:39:48,638 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:39:48,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585670605] [2021-11-16 20:39:48,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585670605] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:39:48,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:39:48,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-11-16 20:39:48,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055337802] [2021-11-16 20:39:48,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:39:48,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-16 20:39:48,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:39:48,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-16 20:39:48,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-11-16 20:39:48,640 INFO L87 Difference]: Start difference. First operand 274 states and 379 transitions. Second operand has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 7 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-16 20:39:50,724 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:39:52,731 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:39:54,739 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:39:56,749 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:39:58,756 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:40:00,763 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:40:05,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:40:05,929 INFO L93 Difference]: Finished difference Result 347 states and 474 transitions. [2021-11-16 20:40:05,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-16 20:40:05,931 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 7 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 77 [2021-11-16 20:40:05,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:40:05,932 INFO L225 Difference]: With dead ends: 347 [2021-11-16 20:40:05,932 INFO L226 Difference]: Without dead ends: 315 [2021-11-16 20:40:05,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=313, Invalid=1247, Unknown=0, NotChecked=0, Total=1560 [2021-11-16 20:40:05,933 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 146 mSDsluCounter, 1854 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 26 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 2046 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 369 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2021-11-16 20:40:05,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 2046 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 609 Invalid, 6 Unknown, 369 Unchecked, 14.7s Time] [2021-11-16 20:40:05,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-16 20:40:05,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 296. [2021-11-16 20:40:05,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 209 states have (on average 1.167464114832536) internal successors, (244), 216 states have internal predecessors, (244), 62 states have call successors, (62), 17 states have call predecessors, (62), 24 states have return successors, (107), 62 states have call predecessors, (107), 58 states have call successors, (107) [2021-11-16 20:40:05,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 413 transitions. [2021-11-16 20:40:05,952 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 413 transitions. Word has length 77 [2021-11-16 20:40:05,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:40:05,953 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 413 transitions. [2021-11-16 20:40:05,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 7 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-16 20:40:05,953 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 413 transitions. [2021-11-16 20:40:05,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-16 20:40:05,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:40:05,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:40:05,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-16 20:40:06,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:40:06,175 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:40:06,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:40:06,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2057323626, now seen corresponding path program 1 times [2021-11-16 20:40:06,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:40:06,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072753794] [2021-11-16 20:40:06,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:40:06,178 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:40:06,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:40:06,179 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:40:06,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-16 20:40:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:40:06,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-16 20:40:06,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:40:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:40:07,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:40:08,618 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-16 20:40:08,619 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 35 treesize of output 1 [2021-11-16 20:40:08,960 INFO L354 Elim1Store]: treesize reduction 51, result has 40.0 percent of original size [2021-11-16 20:40:08,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 45 [2021-11-16 20:40:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 20:40:09,326 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:40:09,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072753794] [2021-11-16 20:40:09,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072753794] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:40:09,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:40:09,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-11-16 20:40:09,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579385975] [2021-11-16 20:40:09,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:40:09,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-16 20:40:09,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:40:09,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-16 20:40:09,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-16 20:40:09,328 INFO L87 Difference]: Start difference. First operand 296 states and 413 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 7 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-16 20:40:11,415 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:40:13,422 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:40:15,426 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:40:17,435 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:40:19,438 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:40:22,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:40:22,413 INFO L93 Difference]: Finished difference Result 494 states and 697 transitions. [2021-11-16 20:40:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-16 20:40:22,415 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 7 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 77 [2021-11-16 20:40:22,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:40:22,416 INFO L225 Difference]: With dead ends: 494 [2021-11-16 20:40:22,416 INFO L226 Difference]: Without dead ends: 300 [2021-11-16 20:40:22,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 135 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2021-11-16 20:40:22,418 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 120 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 21 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2021-11-16 20:40:22,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 1412 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 430 Invalid, 5 Unknown, 229 Unchecked, 11.9s Time] [2021-11-16 20:40:22,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-16 20:40:22,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 274. [2021-11-16 20:40:22,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 189 states have (on average 1.1693121693121693) internal successors, (221), 195 states have internal predecessors, (221), 62 states have call successors, (62), 16 states have call predecessors, (62), 22 states have return successors, (96), 62 states have call predecessors, (96), 58 states have call successors, (96) [2021-11-16 20:40:22,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 379 transitions. [2021-11-16 20:40:22,431 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 379 transitions. Word has length 77 [2021-11-16 20:40:22,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:40:22,431 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 379 transitions. [2021-11-16 20:40:22,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 7 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-16 20:40:22,432 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 379 transitions. [2021-11-16 20:40:22,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-16 20:40:22,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:40:22,433 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:40:22,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-16 20:40:22,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:40:22,647 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:40:22,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:40:22,648 INFO L85 PathProgramCache]: Analyzing trace with hash -338782210, now seen corresponding path program 1 times [2021-11-16 20:40:22,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:40:22,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761402318] [2021-11-16 20:40:22,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:40:22,649 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:40:22,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:40:22,651 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:40:22,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-16 20:40:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:40:23,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 1293 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-16 20:40:23,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:40:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-16 20:40:23,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:40:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-16 20:40:23,511 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:40:23,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761402318] [2021-11-16 20:40:23,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761402318] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-16 20:40:23,511 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:40:23,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-16 20:40:23,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869436904] [2021-11-16 20:40:23,512 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-16 20:40:23,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 20:40:23,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:40:23,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 20:40:23,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:40:23,513 INFO L87 Difference]: Start difference. First operand 274 states and 379 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 5 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-16 20:40:23,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:40:23,557 INFO L93 Difference]: Finished difference Result 343 states and 457 transitions. [2021-11-16 20:40:23,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 20:40:23,558 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 5 states have call predecessors, (10), 1 states have call successors, (10) Word has length 79 [2021-11-16 20:40:23,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:40:23,559 INFO L225 Difference]: With dead ends: 343 [2021-11-16 20:40:23,559 INFO L226 Difference]: Without dead ends: 277 [2021-11-16 20:40:23,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:40:23,562 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 0 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:40:23,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1516 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:40:23,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-16 20:40:23,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 274. [2021-11-16 20:40:23,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 189 states have (on average 1.1693121693121693) internal successors, (221), 195 states have internal predecessors, (221), 62 states have call successors, (62), 16 states have call predecessors, (62), 22 states have return successors, (96), 62 states have call predecessors, (96), 58 states have call successors, (96) [2021-11-16 20:40:23,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 379 transitions. [2021-11-16 20:40:23,575 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 379 transitions. Word has length 79 [2021-11-16 20:40:23,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:40:23,576 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 379 transitions. [2021-11-16 20:40:23,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 5 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-16 20:40:23,576 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 379 transitions. [2021-11-16 20:40:23,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-16 20:40:23,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:40:23,577 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:40:23,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-16 20:40:23,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:40:23,795 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:40:23,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:40:23,796 INFO L85 PathProgramCache]: Analyzing trace with hash 21264189, now seen corresponding path program 1 times [2021-11-16 20:40:23,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:40:23,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602388709] [2021-11-16 20:40:23,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:40:23,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:40:23,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:40:23,798 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:40:23,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-16 20:40:24,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:40:24,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-16 20:40:24,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:40:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:40:25,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:40:27,597 INFO L354 Elim1Store]: treesize reduction 39, result has 46.6 percent of original size [2021-11-16 20:40:27,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 45 [2021-11-16 20:40:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 20:40:27,980 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:40:27,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602388709] [2021-11-16 20:40:27,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602388709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:40:27,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:40:27,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-11-16 20:40:27,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476322124] [2021-11-16 20:40:27,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:40:27,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-16 20:40:27,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:40:27,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-16 20:40:27,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-11-16 20:40:27,982 INFO L87 Difference]: Start difference. First operand 274 states and 379 transitions. Second operand has 30 states, 28 states have (on average 3.357142857142857) internal successors, (94), 26 states have internal predecessors, (94), 8 states have call successors, (17), 6 states have call predecessors, (17), 7 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-16 20:40:30,065 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:40:32,076 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:40:34,082 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:40:36,085 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:40:38,095 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:40:40,099 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:40:42,106 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:40:44,116 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:40:46,128 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:40:48,136 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:40:52,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:40:52,488 INFO L93 Difference]: Finished difference Result 342 states and 473 transitions. [2021-11-16 20:40:52,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-16 20:40:52,489 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 3.357142857142857) internal successors, (94), 26 states have internal predecessors, (94), 8 states have call successors, (17), 6 states have call predecessors, (17), 7 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) Word has length 79 [2021-11-16 20:40:52,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:40:52,490 INFO L225 Difference]: With dead ends: 342 [2021-11-16 20:40:52,491 INFO L226 Difference]: Without dead ends: 340 [2021-11-16 20:40:52,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 127 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=305, Invalid=2145, Unknown=0, NotChecked=0, Total=2450 [2021-11-16 20:40:52,492 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 75 mSDsluCounter, 3329 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 27 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 3527 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 411 IncrementalHoareTripleChecker+Unchecked, 22.3s IncrementalHoareTripleChecker+Time [2021-11-16 20:40:52,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 3527 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1021 Invalid, 10 Unknown, 411 Unchecked, 22.3s Time] [2021-11-16 20:40:52,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-16 20:40:52,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 303. [2021-11-16 20:40:52,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 213 states have (on average 1.15962441314554) internal successors, (247), 219 states have internal predecessors, (247), 64 states have call successors, (64), 19 states have call predecessors, (64), 25 states have return successors, (98), 64 states have call predecessors, (98), 60 states have call successors, (98) [2021-11-16 20:40:52,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 409 transitions. [2021-11-16 20:40:52,506 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 409 transitions. Word has length 79 [2021-11-16 20:40:52,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:40:52,506 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 409 transitions. [2021-11-16 20:40:52,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 3.357142857142857) internal successors, (94), 26 states have internal predecessors, (94), 8 states have call successors, (17), 6 states have call predecessors, (17), 7 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-16 20:40:52,506 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 409 transitions. [2021-11-16 20:40:52,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-16 20:40:52,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:40:52,508 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:40:52,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-16 20:40:52,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:40:52,723 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:40:52,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:40:52,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1633476483, now seen corresponding path program 1 times [2021-11-16 20:40:52,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:40:52,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162893132] [2021-11-16 20:40:52,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:40:52,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:40:52,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:40:52,726 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:40:52,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-16 20:40:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:40:53,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 1298 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-16 20:40:53,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:40:53,367 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 [2021-11-16 20:40:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-16 20:40:54,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:40:56,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-11-16 20:40:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 20:40:56,644 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:40:56,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162893132] [2021-11-16 20:40:56,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162893132] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-16 20:40:56,644 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:40:56,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17, 16] imperfect sequences [] total 30 [2021-11-16 20:40:56,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557816070] [2021-11-16 20:40:56,644 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-16 20:40:56,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-16 20:40:56,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:40:56,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-16 20:40:56,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2021-11-16 20:40:56,645 INFO L87 Difference]: Start difference. First operand 303 states and 409 transitions. Second operand has 30 states, 28 states have (on average 3.857142857142857) internal successors, (108), 24 states have internal predecessors, (108), 9 states have call successors, (17), 6 states have call predecessors, (17), 7 states have return successors, (15), 11 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-16 20:40:58,729 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:41:00,736 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:41:02,743 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:41:04,750 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:41:06,758 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:41:08,762 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:41:13,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:41:13,278 INFO L93 Difference]: Finished difference Result 337 states and 442 transitions. [2021-11-16 20:41:13,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-16 20:41:13,279 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 3.857142857142857) internal successors, (108), 24 states have internal predecessors, (108), 9 states have call successors, (17), 6 states have call predecessors, (17), 7 states have return successors, (15), 11 states have call predecessors, (15), 7 states have call successors, (15) Word has length 79 [2021-11-16 20:41:13,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:41:13,280 INFO L225 Difference]: With dead ends: 337 [2021-11-16 20:41:13,280 INFO L226 Difference]: Without dead ends: 335 [2021-11-16 20:41:13,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2021-11-16 20:41:13,281 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 133 mSDsluCounter, 2098 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 47 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 2269 SdHoareTripleChecker+Invalid, 2399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 612 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2021-11-16 20:41:13,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 2269 Invalid, 2399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1734 Invalid, 6 Unknown, 612 Unchecked, 15.6s Time] [2021-11-16 20:41:13,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-16 20:41:13,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 323. [2021-11-16 20:41:13,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 231 states have (on average 1.155844155844156) internal successors, (267), 239 states have internal predecessors, (267), 64 states have call successors, (64), 19 states have call predecessors, (64), 27 states have return successors, (90), 64 states have call predecessors, (90), 60 states have call successors, (90) [2021-11-16 20:41:13,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 421 transitions. [2021-11-16 20:41:13,292 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 421 transitions. Word has length 79 [2021-11-16 20:41:13,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:41:13,292 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 421 transitions. [2021-11-16 20:41:13,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 3.857142857142857) internal successors, (108), 24 states have internal predecessors, (108), 9 states have call successors, (17), 6 states have call predecessors, (17), 7 states have return successors, (15), 11 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-16 20:41:13,292 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 421 transitions. [2021-11-16 20:41:13,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-16 20:41:13,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:41:13,293 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:41:13,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-16 20:41:13,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:41:13,512 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:41:13,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:41:13,512 INFO L85 PathProgramCache]: Analyzing trace with hash 401202421, now seen corresponding path program 1 times [2021-11-16 20:41:13,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:41:13,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793046265] [2021-11-16 20:41:13,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:41:13,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:41:13,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:41:13,515 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:41:13,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-16 20:41:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:41:14,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 1301 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-16 20:41:14,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:41:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:41:14,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:41:16,065 INFO L354 Elim1Store]: treesize reduction 51, result has 40.0 percent of original size [2021-11-16 20:41:16,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 45 [2021-11-16 20:41:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-16 20:41:16,468 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:41:16,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793046265] [2021-11-16 20:41:16,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793046265] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:41:16,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:41:16,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-11-16 20:41:16,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642814667] [2021-11-16 20:41:16,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:41:16,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-16 20:41:16,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:41:16,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-16 20:41:16,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-11-16 20:41:16,469 INFO L87 Difference]: Start difference. First operand 323 states and 421 transitions. Second operand has 20 states, 20 states have (on average 4.85) internal successors, (97), 18 states have internal predecessors, (97), 7 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-16 20:41:18,551 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:41:20,559 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:41:22,572 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:41:24,581 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:41:26,585 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:41:29,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:41:29,539 INFO L93 Difference]: Finished difference Result 491 states and 642 transitions. [2021-11-16 20:41:29,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-16 20:41:29,541 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.85) internal successors, (97), 18 states have internal predecessors, (97), 7 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) Word has length 81 [2021-11-16 20:41:29,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:41:29,549 INFO L225 Difference]: With dead ends: 491 [2021-11-16 20:41:29,549 INFO L226 Difference]: Without dead ends: 370 [2021-11-16 20:41:29,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-11-16 20:41:29,550 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 167 mSDsluCounter, 1695 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 49 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1884 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2021-11-16 20:41:29,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 1884 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 647 Invalid, 5 Unknown, 254 Unchecked, 12.6s Time] [2021-11-16 20:41:29,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-16 20:41:29,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 332. [2021-11-16 20:41:29,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 239 states have (on average 1.1589958158995817) internal successors, (277), 247 states have internal predecessors, (277), 64 states have call successors, (64), 20 states have call predecessors, (64), 28 states have return successors, (97), 64 states have call predecessors, (97), 60 states have call successors, (97) [2021-11-16 20:41:29,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 438 transitions. [2021-11-16 20:41:29,563 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 438 transitions. Word has length 81 [2021-11-16 20:41:29,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:41:29,563 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 438 transitions. [2021-11-16 20:41:29,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.85) internal successors, (97), 18 states have internal predecessors, (97), 7 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-16 20:41:29,564 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 438 transitions. [2021-11-16 20:41:29,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-16 20:41:29,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:41:29,565 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:41:29,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-16 20:41:29,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:41:29,783 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:41:29,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:41:29,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1616546255, now seen corresponding path program 1 times [2021-11-16 20:41:29,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:41:29,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608642844] [2021-11-16 20:41:29,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:41:29,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:41:29,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:41:29,786 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:41:29,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-16 20:41:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:41:30,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 1301 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-16 20:41:30,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:41:31,843 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-11-16 20:41:31,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 28 [2021-11-16 20:41:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:41:32,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:41:32,815 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-16 20:41:32,815 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:41:32,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608642844] [2021-11-16 20:41:32,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608642844] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 20:41:32,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:41:32,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 18 [2021-11-16 20:41:32,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322263438] [2021-11-16 20:41:32,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:41:32,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 20:41:32,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:41:32,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 20:41:32,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-11-16 20:41:32,829 INFO L87 Difference]: Start difference. First operand 332 states and 438 transitions. Second operand has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-16 20:41:34,917 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:41:35,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:41:35,420 INFO L93 Difference]: Finished difference Result 357 states and 473 transitions. [2021-11-16 20:41:35,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 20:41:35,422 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 85 [2021-11-16 20:41:35,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:41:35,423 INFO L225 Difference]: With dead ends: 357 [2021-11-16 20:41:35,423 INFO L226 Difference]: Without dead ends: 355 [2021-11-16 20:41:35,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 147 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-16 20:41:35,424 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 16 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:41:35,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 976 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 1 Unknown, 118 Unchecked, 2.4s Time] [2021-11-16 20:41:35,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-11-16 20:41:35,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 344. [2021-11-16 20:41:35,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 245 states have (on average 1.1551020408163266) internal successors, (283), 254 states have internal predecessors, (283), 68 states have call successors, (68), 21 states have call predecessors, (68), 30 states have return successors, (105), 68 states have call predecessors, (105), 64 states have call successors, (105) [2021-11-16 20:41:35,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 456 transitions. [2021-11-16 20:41:35,439 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 456 transitions. Word has length 85 [2021-11-16 20:41:35,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:41:35,439 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 456 transitions. [2021-11-16 20:41:35,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-16 20:41:35,439 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 456 transitions. [2021-11-16 20:41:35,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-16 20:41:35,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:41:35,441 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:41:35,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-16 20:41:35,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:41:35,664 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:41:35,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:41:35,664 INFO L85 PathProgramCache]: Analyzing trace with hash 42298307, now seen corresponding path program 1 times [2021-11-16 20:41:35,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:41:35,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932175125] [2021-11-16 20:41:35,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:41:35,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:41:35,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:41:35,667 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:41:35,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-16 20:41:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:41:36,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-16 20:41:36,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:41:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:41:37,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:41:38,936 INFO L354 Elim1Store]: treesize reduction 51, result has 40.0 percent of original size [2021-11-16 20:41:38,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 45 [2021-11-16 20:41:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-16 20:41:39,346 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:41:39,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932175125] [2021-11-16 20:41:39,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932175125] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:41:39,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:41:39,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-11-16 20:41:39,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339512165] [2021-11-16 20:41:39,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:41:39,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-16 20:41:39,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:41:39,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-16 20:41:39,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-11-16 20:41:39,347 INFO L87 Difference]: Start difference. First operand 344 states and 456 transitions. Second operand has 20 states, 20 states have (on average 5.65) internal successors, (113), 18 states have internal predecessors, (113), 7 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-16 20:41:41,432 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:41:43,440 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:41:45,444 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:41:47,454 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:41:49,457 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:41:52,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:41:52,515 INFO L93 Difference]: Finished difference Result 464 states and 592 transitions. [2021-11-16 20:41:52,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-16 20:41:52,516 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.65) internal successors, (113), 18 states have internal predecessors, (113), 7 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) Word has length 89 [2021-11-16 20:41:52,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:41:52,518 INFO L225 Difference]: With dead ends: 464 [2021-11-16 20:41:52,518 INFO L226 Difference]: Without dead ends: 331 [2021-11-16 20:41:52,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 157 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-11-16 20:41:52,519 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 241 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 46 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2021-11-16 20:41:52,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 1506 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 651 Invalid, 5 Unknown, 86 Unchecked, 12.5s Time] [2021-11-16 20:41:52,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-16 20:41:52,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 302. [2021-11-16 20:41:52,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 217 states have (on average 1.1336405529953917) internal successors, (246), 224 states have internal predecessors, (246), 55 states have call successors, (55), 20 states have call predecessors, (55), 29 states have return successors, (80), 57 states have call predecessors, (80), 53 states have call successors, (80) [2021-11-16 20:41:52,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 381 transitions. [2021-11-16 20:41:52,534 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 381 transitions. Word has length 89 [2021-11-16 20:41:52,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:41:52,535 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 381 transitions. [2021-11-16 20:41:52,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.65) internal successors, (113), 18 states have internal predecessors, (113), 7 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-16 20:41:52,535 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 381 transitions. [2021-11-16 20:41:52,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-16 20:41:52,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:41:52,537 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:41:52,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-16 20:41:52,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:41:52,751 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:41:52,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:41:52,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1185384077, now seen corresponding path program 1 times [2021-11-16 20:41:52,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:41:52,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995891081] [2021-11-16 20:41:52,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:41:52,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:41:52,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:41:52,754 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:41:52,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-16 20:41:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:41:53,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 1309 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-16 20:41:53,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:41:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-16 20:41:53,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:41:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-16 20:41:53,653 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:41:53,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995891081] [2021-11-16 20:41:53,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995891081] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 20:41:53,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:41:53,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 7 [2021-11-16 20:41:53,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101701271] [2021-11-16 20:41:53,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:41:53,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 20:41:53,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:41:53,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 20:41:53,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:41:53,655 INFO L87 Difference]: Start difference. First operand 302 states and 381 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 20:41:53,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:41:53,709 INFO L93 Difference]: Finished difference Result 512 states and 656 transitions. [2021-11-16 20:41:53,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 20:41:53,720 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 89 [2021-11-16 20:41:53,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:41:53,721 INFO L225 Difference]: With dead ends: 512 [2021-11-16 20:41:53,721 INFO L226 Difference]: Without dead ends: 312 [2021-11-16 20:41:53,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-16 20:41:53,723 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 10 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:41:53,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1123 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:41:53,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-16 20:41:53,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 308. [2021-11-16 20:41:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 222 states have (on average 1.1306306306306306) internal successors, (251), 229 states have internal predecessors, (251), 55 states have call successors, (55), 20 states have call predecessors, (55), 30 states have return successors, (86), 58 states have call predecessors, (86), 53 states have call successors, (86) [2021-11-16 20:41:53,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 392 transitions. [2021-11-16 20:41:53,736 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 392 transitions. Word has length 89 [2021-11-16 20:41:53,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:41:53,737 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 392 transitions. [2021-11-16 20:41:53,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 20:41:53,737 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 392 transitions. [2021-11-16 20:41:53,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-16 20:41:53,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:41:53,738 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:41:53,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-16 20:41:53,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:41:53,951 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:41:53,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:41:53,952 INFO L85 PathProgramCache]: Analyzing trace with hash -741918941, now seen corresponding path program 1 times [2021-11-16 20:41:53,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:41:53,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982636742] [2021-11-16 20:41:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:41:53,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:41:53,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:41:53,954 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:41:53,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-16 20:41:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:41:54,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-16 20:41:54,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:41:56,699 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-16 20:41:56,699 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 73 treesize of output 49 [2021-11-16 20:41:56,705 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-16 20:41:56,705 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 43 treesize of output 19 [2021-11-16 20:41:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-16 20:41:56,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:42:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-16 20:42:07,332 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:42:07,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982636742] [2021-11-16 20:42:07,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982636742] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 20:42:07,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:42:07,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 23 [2021-11-16 20:42:07,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133922774] [2021-11-16 20:42:07,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:42:07,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 20:42:07,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:42:07,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 20:42:07,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=431, Unknown=2, NotChecked=0, Total=506 [2021-11-16 20:42:07,333 INFO L87 Difference]: Start difference. First operand 308 states and 392 transitions. Second operand has 11 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-16 20:42:09,423 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:42:11,432 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:42:12,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:12,106 INFO L93 Difference]: Finished difference Result 328 states and 417 transitions. [2021-11-16 20:42:12,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 20:42:12,109 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 91 [2021-11-16 20:42:12,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:12,110 INFO L225 Difference]: With dead ends: 328 [2021-11-16 20:42:12,110 INFO L226 Difference]: Without dead ends: 326 [2021-11-16 20:42:12,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 153 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=82, Invalid=516, Unknown=2, NotChecked=0, Total=600 [2021-11-16 20:42:12,111 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 17 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 391 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:12,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 1282 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 103 Invalid, 2 Unknown, 391 Unchecked, 4.6s Time] [2021-11-16 20:42:12,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-16 20:42:12,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 317. [2021-11-16 20:42:12,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 227 states have (on average 1.1277533039647578) internal successors, (256), 234 states have internal predecessors, (256), 58 states have call successors, (58), 21 states have call predecessors, (58), 31 states have return successors, (89), 61 states have call predecessors, (89), 56 states have call successors, (89) [2021-11-16 20:42:12,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 403 transitions. [2021-11-16 20:42:12,123 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 403 transitions. Word has length 91 [2021-11-16 20:42:12,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:12,123 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 403 transitions. [2021-11-16 20:42:12,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-16 20:42:12,124 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 403 transitions. [2021-11-16 20:42:12,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-16 20:42:12,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:12,125 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:42:12,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-16 20:42:12,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:42:12,339 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:12,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:12,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2053729778, now seen corresponding path program 1 times [2021-11-16 20:42:12,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:42:12,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110135488] [2021-11-16 20:42:12,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:12,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:42:12,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:42:12,342 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:42:12,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-16 20:42:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:12,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 1313 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-16 20:42:12,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:42:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 20:42:14,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:42:15,136 INFO L354 Elim1Store]: treesize reduction 39, result has 46.6 percent of original size [2021-11-16 20:42:15,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 45 [2021-11-16 20:42:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-16 20:42:15,549 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:42:15,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110135488] [2021-11-16 20:42:15,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110135488] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:42:15,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:42:15,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-11-16 20:42:15,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121088318] [2021-11-16 20:42:15,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:42:15,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-16 20:42:15,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:42:15,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-16 20:42:15,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-11-16 20:42:15,551 INFO L87 Difference]: Start difference. First operand 317 states and 403 transitions. Second operand has 20 states, 20 states have (on average 5.85) internal successors, (117), 18 states have internal predecessors, (117), 7 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-16 20:42:17,637 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:42:19,652 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:42:21,660 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:42:23,668 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:42:25,675 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:42:27,684 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:42:29,687 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:42:31,696 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:42:33,705 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:42:38,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:38,020 INFO L93 Difference]: Finished difference Result 667 states and 880 transitions. [2021-11-16 20:42:38,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-16 20:42:38,021 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.85) internal successors, (117), 18 states have internal predecessors, (117), 7 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) Word has length 91 [2021-11-16 20:42:38,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:38,023 INFO L225 Difference]: With dead ends: 667 [2021-11-16 20:42:38,023 INFO L226 Difference]: Without dead ends: 426 [2021-11-16 20:42:38,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-11-16 20:42:38,025 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 167 mSDsluCounter, 2444 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 60 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 2705 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 21.8s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:38,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 2705 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1214 Invalid, 9 Unknown, 165 Unchecked, 21.8s Time] [2021-11-16 20:42:38,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-11-16 20:42:38,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 362. [2021-11-16 20:42:38,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 258 states have (on average 1.1317829457364341) internal successors, (292), 267 states have internal predecessors, (292), 69 states have call successors, (69), 22 states have call predecessors, (69), 34 states have return successors, (106), 72 states have call predecessors, (106), 67 states have call successors, (106) [2021-11-16 20:42:38,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 467 transitions. [2021-11-16 20:42:38,040 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 467 transitions. Word has length 91 [2021-11-16 20:42:38,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:38,042 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 467 transitions. [2021-11-16 20:42:38,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.85) internal successors, (117), 18 states have internal predecessors, (117), 7 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-16 20:42:38,042 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 467 transitions. [2021-11-16 20:42:38,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-16 20:42:38,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:38,043 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:42:38,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-16 20:42:38,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:42:38,255 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:38,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:38,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1851905844, now seen corresponding path program 1 times [2021-11-16 20:42:38,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:42:38,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590126456] [2021-11-16 20:42:38,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:38,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:42:38,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:42:38,258 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:42:38,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-16 20:42:38,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:38,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-16 20:42:38,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:42:40,189 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-16 20:42:40,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:42:41,414 INFO L354 Elim1Store]: treesize reduction 39, result has 46.6 percent of original size [2021-11-16 20:42:41,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 45 [2021-11-16 20:42:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-16 20:42:41,853 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:42:41,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590126456] [2021-11-16 20:42:41,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1590126456] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:42:41,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:42:41,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-11-16 20:42:41,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347145656] [2021-11-16 20:42:41,853 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:42:41,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-16 20:42:41,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:42:41,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-16 20:42:41,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-16 20:42:41,854 INFO L87 Difference]: Start difference. First operand 362 states and 467 transitions. Second operand has 22 states, 22 states have (on average 5.5) internal successors, (121), 20 states have internal predecessors, (121), 7 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-16 20:42:43,944 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:42:45,956 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:42:47,965 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:42:49,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:49,479 INFO L93 Difference]: Finished difference Result 474 states and 594 transitions. [2021-11-16 20:42:49,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-16 20:42:49,479 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.5) internal successors, (121), 20 states have internal predecessors, (121), 7 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 91 [2021-11-16 20:42:49,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:49,481 INFO L225 Difference]: With dead ends: 474 [2021-11-16 20:42:49,481 INFO L226 Difference]: Without dead ends: 398 [2021-11-16 20:42:49,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 157 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2021-11-16 20:42:49,482 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 103 mSDsluCounter, 2156 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 13 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 2349 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:49,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 2349 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 265 Invalid, 3 Unknown, 152 Unchecked, 6.8s Time] [2021-11-16 20:42:49,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-16 20:42:49,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 384. [2021-11-16 20:42:49,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 278 states have (on average 1.1330935251798562) internal successors, (315), 288 states have internal predecessors, (315), 69 states have call successors, (69), 23 states have call predecessors, (69), 36 states have return successors, (104), 72 states have call predecessors, (104), 67 states have call successors, (104) [2021-11-16 20:42:49,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 488 transitions. [2021-11-16 20:42:49,496 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 488 transitions. Word has length 91 [2021-11-16 20:42:49,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:49,496 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 488 transitions. [2021-11-16 20:42:49,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.5) internal successors, (121), 20 states have internal predecessors, (121), 7 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-16 20:42:49,497 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 488 transitions. [2021-11-16 20:42:49,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-16 20:42:49,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:49,498 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:42:49,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-16 20:42:49,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 20:42:49,720 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:49,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:49,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1539637644, now seen corresponding path program 2 times [2021-11-16 20:42:49,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 20:42:49,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513068622] [2021-11-16 20:42:49,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 20:42:49,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 20:42:49,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 20:42:49,722 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 20:42:49,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-16 20:42:54,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 20:42:54,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 20:42:54,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-16 20:42:54,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:42:56,657 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-16 20:42:56,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:42:59,658 INFO L354 Elim1Store]: treesize reduction 193, result has 45.9 percent of original size [2021-11-16 20:42:59,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 60 treesize of output 179 [2021-11-16 20:43:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-16 20:43:35,918 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 20:43:35,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513068622] [2021-11-16 20:43:35,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513068622] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:43:35,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:43:35,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-11-16 20:43:35,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753556302] [2021-11-16 20:43:35,919 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:43:35,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-16 20:43:35,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 20:43:35,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-16 20:43:35,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-11-16 20:43:35,920 INFO L87 Difference]: Start difference. First operand 384 states and 488 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 22 states have internal predecessors, (122), 7 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-16 20:43:38,004 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:43:40,016 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:43:42,028 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:43:44,037 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:43:46,045 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] Killed by 15