./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_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_priority_queue_clean_up_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 efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 21:37:48,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 21:37:48,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 21:37:48,950 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 21:37:48,950 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 21:37:48,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 21:37:48,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 21:37:48,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 21:37:48,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 21:37:48,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 21:37:48,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 21:37:48,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 21:37:48,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 21:37:48,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 21:37:48,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 21:37:48,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 21:37:48,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 21:37:48,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 21:37:48,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 21:37:48,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 21:37:48,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 21:37:48,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 21:37:48,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 21:37:48,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 21:37:49,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 21:37:49,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 21:37:49,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 21:37:49,004 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 21:37:49,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 21:37:49,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 21:37:49,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 21:37:49,006 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 21:37:49,008 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 21:37:49,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 21:37:49,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 21:37:49,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 21:37:49,011 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 21:37:49,011 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 21:37:49,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 21:37:49,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 21:37:49,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 21:37:49,014 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-16 21:37:49,053 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 21:37:49,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 21:37:49,060 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 21:37:49,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 21:37:49,061 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 21:37:49,061 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 21:37:49,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 21:37:49,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 21:37:49,062 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 21:37:49,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 21:37:49,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-16 21:37:49,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 21:37:49,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 21:37:49,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 21:37:49,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 21:37:49,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 21:37:49,064 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 21:37:49,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 21:37:49,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 21:37:49,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 21:37:49,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 21:37:49,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 21:37:49,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 21:37:49,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 21:37:49,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 21:37:49,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-16 21:37:49,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-16 21:37:49,067 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 21:37:49,067 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 21:37:49,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 21:37:49,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 21:37:49,067 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 [2021-11-16 21:37:49,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 21:37:49,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 21:37:49,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 21:37:49,346 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 21:37:49,346 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 21:37:49,348 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2021-11-16 21:37:49,436 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e888d9868/8c21b069e2cf4202b23ee546bf4eb2a2/FLAGfc3b333ab [2021-11-16 21:37:50,088 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 21:37:50,089 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2021-11-16 21:37:50,119 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e888d9868/8c21b069e2cf4202b23ee546bf4eb2a2/FLAGfc3b333ab [2021-11-16 21:37:50,259 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e888d9868/8c21b069e2cf4202b23ee546bf4eb2a2 [2021-11-16 21:37:50,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 21:37:50,263 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 21:37:50,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 21:37:50,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 21:37:50,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 21:37:50,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 09:37:50" (1/1) ... [2021-11-16 21:37:50,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68c836b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:37:50, skipping insertion in model container [2021-11-16 21:37:50,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 09:37:50" (1/1) ... [2021-11-16 21:37:50,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 21:37:50,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 21:37:50,628 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_priority_queue_clean_up_harness.i[4501,4514] [2021-11-16 21:37:50,638 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_priority_queue_clean_up_harness.i[4561,4574] [2021-11-16 21:37:50,670 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 21:37:50,679 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 21:37:51,261 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 21:37:51,309 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:37:51,310 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:37:51,310 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:37:51,311 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:37:51,312 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:37:51,326 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:37:51,327 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:37:51,328 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:37:51,329 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:37:51,524 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 21:37:51,525 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 21:37:51,526 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 21:37:51,527 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 21:37:51,528 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 21:37:51,529 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 21:37:51,529 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 21:37:51,530 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 21:37:51,531 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 21:37:51,531 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 21:37:51,632 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:37:51,639 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:37:51,718 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 21:37:51,761 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 21:37:51,785 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_priority_queue_clean_up_harness.i[4501,4514] [2021-11-16 21:37:51,786 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_priority_queue_clean_up_harness.i[4561,4574] [2021-11-16 21:37:51,789 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 21:37:51,790 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 21:37:51,843 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 21:37:51,862 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:37:51,863 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:37:51,863 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:37:51,864 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:37:51,864 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:37:51,869 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:37:51,870 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:37:51,870 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:37:51,870 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:37:51,895 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 21:37:51,896 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 21:37:51,897 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 21:37:51,897 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 21:37:51,898 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 21:37:51,900 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 21:37:51,900 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 21:37:51,901 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 21:37:51,901 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 21:37:51,901 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 21:37:51,930 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:37:51,930 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:37:51,954 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 21:37:52,132 INFO L208 MainTranslator]: Completed translation [2021-11-16 21:37:52,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:37:52 WrapperNode [2021-11-16 21:37:52,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 21:37:52,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 21:37:52,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 21:37:52,133 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 21:37:52,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:37:52" (1/1) ... [2021-11-16 21:37:52,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:37:52" (1/1) ... [2021-11-16 21:37:52,312 INFO L137 Inliner]: procedures = 691, calls = 1499, calls flagged for inlining = 55, calls inlined = 9, statements flattened = 595 [2021-11-16 21:37:52,313 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 21:37:52,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 21:37:52,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 21:37:52,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 21:37:52,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:37:52" (1/1) ... [2021-11-16 21:37:52,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:37:52" (1/1) ... [2021-11-16 21:37:52,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:37:52" (1/1) ... [2021-11-16 21:37:52,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:37:52" (1/1) ... [2021-11-16 21:37:52,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:37:52" (1/1) ... [2021-11-16 21:37:52,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:37:52" (1/1) ... [2021-11-16 21:37:52,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:37:52" (1/1) ... [2021-11-16 21:37:52,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 21:37:52,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 21:37:52,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 21:37:52,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 21:37:52,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:37:52" (1/1) ... [2021-11-16 21:37:52,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 21:37:52,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:37:52,513 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 21:37:52,540 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 21:37:52,556 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-11-16 21:37:52,556 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-11-16 21:37:52,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 21:37:52,557 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-11-16 21:37:52,557 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-11-16 21:37:52,558 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-11-16 21:37:52,558 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-11-16 21:37:52,559 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-16 21:37:52,559 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-16 21:37:52,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-16 21:37:52,560 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-16 21:37:52,560 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-16 21:37:52,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-16 21:37:52,560 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-16 21:37:52,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-16 21:37:52,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 21:37:52,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-16 21:37:52,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 21:37:52,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 21:37:52,561 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_clean_up [2021-11-16 21:37:52,561 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_clean_up [2021-11-16 21:37:52,561 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-16 21:37:52,562 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-16 21:37:52,562 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-16 21:37:52,562 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-16 21:37:52,563 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2021-11-16 21:37:52,563 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2021-11-16 21:37:52,563 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-11-16 21:37:52,564 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-11-16 21:37:52,564 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-16 21:37:52,564 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-16 21:37:52,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 21:37:52,564 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_umull_overflow [2021-11-16 21:37:52,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-16 21:37:52,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 21:37:52,565 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-16 21:37:52,565 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-16 21:37:52,565 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-16 21:37:52,565 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-16 21:37:52,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-16 21:37:52,566 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-11-16 21:37:52,566 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-11-16 21:37:52,566 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-11-16 21:37:52,566 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-11-16 21:37:52,566 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2021-11-16 21:37:52,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2021-11-16 21:37:52,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-16 21:37:52,938 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 21:37:52,939 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 21:37:55,655 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 21:37:55,662 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 21:37:55,662 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-16 21:37:55,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 09:37:55 BoogieIcfgContainer [2021-11-16 21:37:55,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 21:37:55,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 21:37:55,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 21:37:55,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 21:37:55,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 09:37:50" (1/3) ... [2021-11-16 21:37:55,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e0dabcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 09:37:55, skipping insertion in model container [2021-11-16 21:37:55,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:37:52" (2/3) ... [2021-11-16 21:37:55,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e0dabcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 09:37:55, skipping insertion in model container [2021-11-16 21:37:55,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 09:37:55" (3/3) ... [2021-11-16 21:37:55,683 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_clean_up_harness.i [2021-11-16 21:37:55,691 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 21:37:55,692 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 21:37:55,759 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 21:37:55,777 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 21:37:55,779 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 21:37:55,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 112 states have (on average 1.2678571428571428) internal successors, (142), 113 states have internal predecessors, (142), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-16 21:37:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-16 21:37:55,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:37:55,842 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 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 21:37:55,843 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:37:55,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:37:55,850 INFO L85 PathProgramCache]: Analyzing trace with hash 432166812, now seen corresponding path program 1 times [2021-11-16 21:37:55,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:37:55,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372278079] [2021-11-16 21:37:55,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:37:55,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:37:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:56,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:37:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:56,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:37:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:56,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 21:37:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:56,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-16 21:37:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:56,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:37:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:56,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:37:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:56,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-16 21:37:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:56,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:37:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:56,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:37:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:56,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-16 21:37:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:56,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 21:37:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:56,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-16 21:37:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:56,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:37:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:56,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:37:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:56,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-16 21:37:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:56,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-16 21:37:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-16 21:37:56,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:37:56,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372278079] [2021-11-16 21:37:56,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372278079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:37:56,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:37:56,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 21:37:56,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178949200] [2021-11-16 21:37:56,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:37:56,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 21:37:56,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:37:56,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 21:37:56,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-16 21:37:56,773 INFO L87 Difference]: Start difference. First operand has 165 states, 112 states have (on average 1.2678571428571428) internal successors, (142), 113 states have internal predecessors, (142), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-16 21:37:58,756 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 21:37:59,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:37:59,285 INFO L93 Difference]: Finished difference Result 361 states and 504 transitions. [2021-11-16 21:37:59,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-16 21:37:59,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 105 [2021-11-16 21:37:59,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:37:59,301 INFO L225 Difference]: With dead ends: 361 [2021-11-16 21:37:59,301 INFO L226 Difference]: Without dead ends: 202 [2021-11-16 21:37:59,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-16 21:37:59,311 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 89 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:37:59,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 305 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-16 21:37:59,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-16 21:37:59,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2021-11-16 21:37:59,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.233644859813084) internal successors, (132), 109 states have internal predecessors, (132), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-16 21:37:59,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 201 transitions. [2021-11-16 21:37:59,379 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 201 transitions. Word has length 105 [2021-11-16 21:37:59,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:37:59,379 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 201 transitions. [2021-11-16 21:37:59,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-16 21:37:59,380 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 201 transitions. [2021-11-16 21:37:59,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-16 21:37:59,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:37:59,383 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 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] [2021-11-16 21:37:59,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-16 21:37:59,384 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:37:59,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:37:59,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1130672400, now seen corresponding path program 1 times [2021-11-16 21:37:59,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:37:59,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812942918] [2021-11-16 21:37:59,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:37:59,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:37:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:59,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:37:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:59,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:37:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:59,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 21:37:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:59,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-16 21:37:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:59,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:37:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:59,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:37:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:59,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-16 21:37:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:59,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:37:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:59,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:37:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:59,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-16 21:37:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:59,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 21:37:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:59,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-16 21:37:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:59,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:37:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:59,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:37:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:59,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-16 21:37:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:59,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:37:59,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:59,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:37:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:59,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-16 21:37:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:59,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-16 21:37:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:37:59,906 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 21:37:59,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:37:59,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812942918] [2021-11-16 21:37:59,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812942918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:37:59,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:37:59,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 21:37:59,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649440361] [2021-11-16 21:37:59,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:37:59,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 21:37:59,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:37:59,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 21:37:59,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-16 21:37:59,911 INFO L87 Difference]: Start difference. First operand 160 states and 201 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-16 21:38:01,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:01,136 INFO L93 Difference]: Finished difference Result 341 states and 448 transitions. [2021-11-16 21:38:01,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 21:38:01,136 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 122 [2021-11-16 21:38:01,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:01,140 INFO L225 Difference]: With dead ends: 341 [2021-11-16 21:38:01,140 INFO L226 Difference]: Without dead ends: 245 [2021-11-16 21:38:01,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-16 21:38:01,142 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 278 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:01,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 667 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-16 21:38:01,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-16 21:38:01,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 160. [2021-11-16 21:38:01,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.2242990654205608) internal successors, (131), 109 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-16 21:38:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 200 transitions. [2021-11-16 21:38:01,162 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 200 transitions. Word has length 122 [2021-11-16 21:38:01,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:01,163 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 200 transitions. [2021-11-16 21:38:01,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-16 21:38:01,163 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 200 transitions. [2021-11-16 21:38:01,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-16 21:38:01,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:01,165 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 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] [2021-11-16 21:38:01,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-16 21:38:01,166 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:01,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:01,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2103837312, now seen corresponding path program 1 times [2021-11-16 21:38:01,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:01,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126801791] [2021-11-16 21:38:01,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:01,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:01,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:38:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:01,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:38:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:01,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 21:38:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:01,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-16 21:38:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:01,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:38:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:01,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:38:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:01,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-16 21:38:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:01,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:38:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:01,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:38:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:01,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-16 21:38:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:01,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:38:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:01,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 21:38:01,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:01,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-16 21:38:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:01,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:38:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:01,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:38:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:01,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-16 21:38:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:01,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:38:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:01,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:38:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:01,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-16 21:38:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:01,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-16 21:38:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:01,604 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 21:38:01,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:01,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126801791] [2021-11-16 21:38:01,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126801791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:38:01,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:38:01,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-16 21:38:01,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893861938] [2021-11-16 21:38:01,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:38:01,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 21:38:01,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:01,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 21:38:01,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-16 21:38:01,608 INFO L87 Difference]: Start difference. First operand 160 states and 200 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-16 21:38:02,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:02,841 INFO L93 Difference]: Finished difference Result 371 states and 489 transitions. [2021-11-16 21:38:02,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-16 21:38:02,842 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 130 [2021-11-16 21:38:02,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:02,844 INFO L225 Difference]: With dead ends: 371 [2021-11-16 21:38:02,844 INFO L226 Difference]: Without dead ends: 226 [2021-11-16 21:38:02,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-11-16 21:38:02,846 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 255 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:02,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 959 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-16 21:38:02,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-16 21:38:02,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 162. [2021-11-16 21:38:02,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.2222222222222223) internal successors, (132), 111 states have internal predecessors, (132), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2021-11-16 21:38:02,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 203 transitions. [2021-11-16 21:38:02,863 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 203 transitions. Word has length 130 [2021-11-16 21:38:02,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:02,864 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 203 transitions. [2021-11-16 21:38:02,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-16 21:38:02,864 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 203 transitions. [2021-11-16 21:38:02,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-16 21:38:02,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:02,867 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2021-11-16 21:38:02,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-16 21:38:02,867 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:02,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:02,868 INFO L85 PathProgramCache]: Analyzing trace with hash -209170488, now seen corresponding path program 1 times [2021-11-16 21:38:02,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:02,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424773935] [2021-11-16 21:38:02,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:02,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:02,949 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:02,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295296947] [2021-11-16 21:38:02,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:02,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:02,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:02,955 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 21:38:02,965 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 21:38:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:03,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 2364 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-16 21:38:03,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-16 21:38:03,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:38:03,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:03,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424773935] [2021-11-16 21:38:03,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:03,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295296947] [2021-11-16 21:38:03,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295296947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:38:03,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:38:03,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-16 21:38:03,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347403296] [2021-11-16 21:38:03,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:38:03,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 21:38:03,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:03,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 21:38:03,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-16 21:38:03,858 INFO L87 Difference]: Start difference. First operand 162 states and 203 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-16 21:38:04,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:04,019 INFO L93 Difference]: Finished difference Result 261 states and 324 transitions. [2021-11-16 21:38:04,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 21:38:04,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 145 [2021-11-16 21:38:04,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:04,023 INFO L225 Difference]: With dead ends: 261 [2021-11-16 21:38:04,023 INFO L226 Difference]: Without dead ends: 162 [2021-11-16 21:38:04,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-16 21:38:04,026 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 235 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:04,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 802 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:38:04,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-16 21:38:04,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-11-16 21:38:04,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.212962962962963) internal successors, (131), 111 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2021-11-16 21:38:04,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2021-11-16 21:38:04,054 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 145 [2021-11-16 21:38:04,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:04,058 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2021-11-16 21:38:04,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-16 21:38:04,059 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2021-11-16 21:38:04,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-16 21:38:04,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:04,063 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:04,096 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 21:38:04,279 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 21:38:04,280 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:04,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:04,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1337604585, now seen corresponding path program 1 times [2021-11-16 21:38:04,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:04,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905121031] [2021-11-16 21:38:04,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:04,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:04,326 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:04,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867938837] [2021-11-16 21:38:04,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:04,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:04,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:04,328 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 21:38:04,329 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 21:38:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:04,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 2436 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-16 21:38:04,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-16 21:38:05,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:38:05,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:05,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905121031] [2021-11-16 21:38:05,196 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:05,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867938837] [2021-11-16 21:38:05,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867938837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:38:05,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:38:05,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-16 21:38:05,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660170055] [2021-11-16 21:38:05,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:38:05,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 21:38:05,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:05,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 21:38:05,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-16 21:38:05,198 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2021-11-16 21:38:05,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:05,458 INFO L93 Difference]: Finished difference Result 274 states and 342 transitions. [2021-11-16 21:38:05,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 21:38:05,459 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 161 [2021-11-16 21:38:05,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:05,460 INFO L225 Difference]: With dead ends: 274 [2021-11-16 21:38:05,460 INFO L226 Difference]: Without dead ends: 162 [2021-11-16 21:38:05,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-16 21:38:05,461 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 300 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:05,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 1070 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 21:38:05,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-16 21:38:05,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-11-16 21:38:05,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.212962962962963) internal successors, (131), 111 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2021-11-16 21:38:05,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 201 transitions. [2021-11-16 21:38:05,470 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 201 transitions. Word has length 161 [2021-11-16 21:38:05,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:05,471 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 201 transitions. [2021-11-16 21:38:05,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2021-11-16 21:38:05,472 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 201 transitions. [2021-11-16 21:38:05,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-16 21:38:05,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:05,474 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:05,510 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 21:38:05,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:05,699 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:05,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:05,700 INFO L85 PathProgramCache]: Analyzing trace with hash 996052163, now seen corresponding path program 1 times [2021-11-16 21:38:05,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:05,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89561794] [2021-11-16 21:38:05,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:05,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:05,745 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:05,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180642623] [2021-11-16 21:38:05,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:05,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:05,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:05,748 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 21:38:05,749 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 21:38:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:06,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 2557 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-16 21:38:06,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-16 21:38:06,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:38:06,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:06,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89561794] [2021-11-16 21:38:06,658 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:06,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180642623] [2021-11-16 21:38:06,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180642623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:38:06,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:38:06,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-16 21:38:06,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449701034] [2021-11-16 21:38:06,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:38:06,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 21:38:06,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:06,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 21:38:06,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-16 21:38:06,660 INFO L87 Difference]: Start difference. First operand 162 states and 201 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 21:38:08,689 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 21:38:10,579 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:38:12,643 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:38:12,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:12,965 INFO L93 Difference]: Finished difference Result 286 states and 356 transitions. [2021-11-16 21:38:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 21:38:12,966 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 176 [2021-11-16 21:38:12,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:12,968 INFO L225 Difference]: With dead ends: 286 [2021-11-16 21:38:12,968 INFO L226 Difference]: Without dead ends: 180 [2021-11-16 21:38:12,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-16 21:38:12,969 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 21 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:12,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 897 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2021-11-16 21:38:12,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-16 21:38:12,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 166. [2021-11-16 21:38:12,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 112 states have (on average 1.2142857142857142) internal successors, (136), 115 states have internal predecessors, (136), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2021-11-16 21:38:12,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 206 transitions. [2021-11-16 21:38:12,979 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 206 transitions. Word has length 176 [2021-11-16 21:38:12,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:12,979 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 206 transitions. [2021-11-16 21:38:12,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 21:38:12,980 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 206 transitions. [2021-11-16 21:38:12,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-16 21:38:12,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:12,982 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:13,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-16 21:38:13,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:13,204 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:13,204 INFO L85 PathProgramCache]: Analyzing trace with hash 28701509, now seen corresponding path program 1 times [2021-11-16 21:38:13,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:13,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964300494] [2021-11-16 21:38:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:13,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:13,252 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:13,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99522029] [2021-11-16 21:38:13,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:13,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:13,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:13,254 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 21:38:13,256 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 21:38:13,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:13,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 2554 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 21:38:13,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:13,963 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-16 21:38:13,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:38:13,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:13,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964300494] [2021-11-16 21:38:13,963 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:13,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99522029] [2021-11-16 21:38:13,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99522029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:38:13,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:38:13,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 21:38:13,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57566857] [2021-11-16 21:38:13,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:38:13,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 21:38:13,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:13,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 21:38:13,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 21:38:13,966 INFO L87 Difference]: Start difference. First operand 166 states and 206 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 21:38:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:13,992 INFO L93 Difference]: Finished difference Result 274 states and 339 transitions. [2021-11-16 21:38:13,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 21:38:13,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 176 [2021-11-16 21:38:13,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:13,994 INFO L225 Difference]: With dead ends: 274 [2021-11-16 21:38:13,994 INFO L226 Difference]: Without dead ends: 170 [2021-11-16 21:38:13,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 173 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 21:38:13,995 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 3 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 583 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 21:38:13,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 583 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:38:13,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-16 21:38:14,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2021-11-16 21:38:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 114 states have (on average 1.2105263157894737) internal successors, (138), 117 states have internal predecessors, (138), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2021-11-16 21:38:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 208 transitions. [2021-11-16 21:38:14,005 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 208 transitions. Word has length 176 [2021-11-16 21:38:14,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:14,006 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 208 transitions. [2021-11-16 21:38:14,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 21:38:14,006 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 208 transitions. [2021-11-16 21:38:14,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-16 21:38:14,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:14,008 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:14,043 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 21:38:14,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:14,222 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:14,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:14,222 INFO L85 PathProgramCache]: Analyzing trace with hash -463924665, now seen corresponding path program 1 times [2021-11-16 21:38:14,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:14,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902057790] [2021-11-16 21:38:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:14,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:14,298 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:14,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795490576] [2021-11-16 21:38:14,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:14,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:14,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:14,301 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 21:38:14,302 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 21:38:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:14,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 2549 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-16 21:38:14,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-16 21:38:15,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:38:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-16 21:38:15,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:15,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902057790] [2021-11-16 21:38:15,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:15,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795490576] [2021-11-16 21:38:15,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795490576] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 21:38:15,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:38:15,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-11-16 21:38:15,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160310252] [2021-11-16 21:38:15,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:38:15,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 21:38:15,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:15,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 21:38:15,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-16 21:38:15,459 INFO L87 Difference]: Start difference. First operand 168 states and 208 transitions. Second operand has 6 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-16 21:38:15,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:15,499 INFO L93 Difference]: Finished difference Result 178 states and 222 transitions. [2021-11-16 21:38:15,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 21:38:15,500 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 176 [2021-11-16 21:38:15,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:15,502 INFO L225 Difference]: With dead ends: 178 [2021-11-16 21:38:15,502 INFO L226 Difference]: Without dead ends: 176 [2021-11-16 21:38:15,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-16 21:38:15,503 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 6 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:15,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 978 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:38:15,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-16 21:38:15,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-11-16 21:38:15,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 118 states have (on average 1.2033898305084745) internal successors, (142), 122 states have internal predecessors, (142), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-11-16 21:38:15,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 219 transitions. [2021-11-16 21:38:15,513 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 219 transitions. Word has length 176 [2021-11-16 21:38:15,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:15,514 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 219 transitions. [2021-11-16 21:38:15,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-16 21:38:15,514 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 219 transitions. [2021-11-16 21:38:15,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-16 21:38:15,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:15,516 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:15,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-16 21:38:15,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:15,722 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:15,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:15,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1104137534, now seen corresponding path program 1 times [2021-11-16 21:38:15,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:15,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2255681] [2021-11-16 21:38:15,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:15,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:15,797 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:15,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621534887] [2021-11-16 21:38:15,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:15,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:15,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:15,800 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 21:38:15,824 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 21:38:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:16,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 2552 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-16 21:38:16,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-16 21:38:16,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:38:16,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:16,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2255681] [2021-11-16 21:38:16,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:16,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621534887] [2021-11-16 21:38:16,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621534887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:38:16,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:38:16,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-16 21:38:16,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585888063] [2021-11-16 21:38:16,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:38:16,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 21:38:16,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:16,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 21:38:16,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-16 21:38:16,455 INFO L87 Difference]: Start difference. First operand 175 states and 219 transitions. Second operand has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-16 21:38:16,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:16,502 INFO L93 Difference]: Finished difference Result 281 states and 350 transitions. [2021-11-16 21:38:16,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 21:38:16,508 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 176 [2021-11-16 21:38:16,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:16,509 INFO L225 Difference]: With dead ends: 281 [2021-11-16 21:38:16,509 INFO L226 Difference]: Without dead ends: 175 [2021-11-16 21:38:16,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-16 21:38:16,511 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 13 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:16,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 950 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:38:16,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-16 21:38:16,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-11-16 21:38:16,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 118 states have (on average 1.194915254237288) internal successors, (141), 122 states have internal predecessors, (141), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-11-16 21:38:16,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 218 transitions. [2021-11-16 21:38:16,521 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 218 transitions. Word has length 176 [2021-11-16 21:38:16,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:16,521 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 218 transitions. [2021-11-16 21:38:16,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-16 21:38:16,522 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 218 transitions. [2021-11-16 21:38:16,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-16 21:38:16,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:16,524 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:16,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-16 21:38:16,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:16,740 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:16,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:16,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1406424536, now seen corresponding path program 1 times [2021-11-16 21:38:16,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:16,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918108740] [2021-11-16 21:38:16,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:16,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:16,821 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:16,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432015806] [2021-11-16 21:38:16,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:16,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:16,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:16,825 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 21:38:16,826 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 21:38:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:17,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 2559 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-16 21:38:17,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-16 21:38:17,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:38:17,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:17,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918108740] [2021-11-16 21:38:17,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:17,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432015806] [2021-11-16 21:38:17,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432015806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:38:17,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:38:17,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-16 21:38:17,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831821771] [2021-11-16 21:38:17,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:38:17,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 21:38:17,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:17,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 21:38:17,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-16 21:38:17,581 INFO L87 Difference]: Start difference. First operand 175 states and 218 transitions. Second operand has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-16 21:38:17,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:17,656 INFO L93 Difference]: Finished difference Result 283 states and 351 transitions. [2021-11-16 21:38:17,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 21:38:17,657 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 177 [2021-11-16 21:38:17,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:17,658 INFO L225 Difference]: With dead ends: 283 [2021-11-16 21:38:17,658 INFO L226 Difference]: Without dead ends: 177 [2021-11-16 21:38:17,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-16 21:38:17,660 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 18 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:17,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 948 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:38:17,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-16 21:38:17,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2021-11-16 21:38:17,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 119 states have (on average 1.1932773109243697) internal successors, (142), 123 states have internal predecessors, (142), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-11-16 21:38:17,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 219 transitions. [2021-11-16 21:38:17,669 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 219 transitions. Word has length 177 [2021-11-16 21:38:17,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:17,670 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 219 transitions. [2021-11-16 21:38:17,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-16 21:38:17,670 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 219 transitions. [2021-11-16 21:38:17,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-16 21:38:17,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:17,677 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:17,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-16 21:38:17,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:17,904 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:17,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:17,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1080671750, now seen corresponding path program 1 times [2021-11-16 21:38:17,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:17,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376112835] [2021-11-16 21:38:17,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:17,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:17,947 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:17,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730997222] [2021-11-16 21:38:17,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:17,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:17,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:17,949 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 21:38:17,970 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 21:38:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:18,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 2566 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-16 21:38:18,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-16 21:38:18,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:38:18,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:18,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376112835] [2021-11-16 21:38:18,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:18,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730997222] [2021-11-16 21:38:18,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730997222] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:38:18,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:38:18,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 21:38:18,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292440447] [2021-11-16 21:38:18,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:38:18,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 21:38:18,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:18,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 21:38:18,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 21:38:18,722 INFO L87 Difference]: Start difference. First operand 176 states and 219 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 21:38:18,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:18,800 INFO L93 Difference]: Finished difference Result 293 states and 372 transitions. [2021-11-16 21:38:18,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-16 21:38:18,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 179 [2021-11-16 21:38:18,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:18,802 INFO L225 Difference]: With dead ends: 293 [2021-11-16 21:38:18,802 INFO L226 Difference]: Without dead ends: 181 [2021-11-16 21:38:18,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 176 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 21:38:18,806 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 7 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:18,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 559 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:38:18,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-16 21:38:18,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2021-11-16 21:38:18,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 120 states have (on average 1.1916666666666667) internal successors, (143), 124 states have internal predecessors, (143), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-11-16 21:38:18,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 220 transitions. [2021-11-16 21:38:18,817 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 220 transitions. Word has length 179 [2021-11-16 21:38:18,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:18,818 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 220 transitions. [2021-11-16 21:38:18,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 21:38:18,818 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 220 transitions. [2021-11-16 21:38:18,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-16 21:38:18,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:18,821 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:18,852 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 21:38:19,038 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,SelfDestructingSolverStorable10 [2021-11-16 21:38:19,038 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:19,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:19,039 INFO L85 PathProgramCache]: Analyzing trace with hash 712361510, now seen corresponding path program 1 times [2021-11-16 21:38:19,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:19,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078091100] [2021-11-16 21:38:19,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:19,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:19,080 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:19,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782016109] [2021-11-16 21:38:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:19,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:19,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:19,082 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 21:38:19,084 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 21:38:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:19,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 2572 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-16 21:38:19,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:19,773 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-16 21:38:19,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:38:19,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:19,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078091100] [2021-11-16 21:38:19,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:19,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782016109] [2021-11-16 21:38:19,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782016109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:38:19,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:38:19,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-16 21:38:19,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687435045] [2021-11-16 21:38:19,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:38:19,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 21:38:19,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:19,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 21:38:19,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-16 21:38:19,775 INFO L87 Difference]: Start difference. First operand 177 states and 220 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-16 21:38:19,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:19,817 INFO L93 Difference]: Finished difference Result 285 states and 356 transitions. [2021-11-16 21:38:19,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 21:38:19,817 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 179 [2021-11-16 21:38:19,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:19,819 INFO L225 Difference]: With dead ends: 285 [2021-11-16 21:38:19,819 INFO L226 Difference]: Without dead ends: 183 [2021-11-16 21:38:19,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-16 21:38:19,820 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 4 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:19,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 1173 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:38:19,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-16 21:38:19,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2021-11-16 21:38:19,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 122 states have (on average 1.1885245901639345) internal successors, (145), 125 states have internal predecessors, (145), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 36 states have call predecessors, (41), 35 states have call successors, (41) [2021-11-16 21:38:19,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 222 transitions. [2021-11-16 21:38:19,830 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 222 transitions. Word has length 179 [2021-11-16 21:38:19,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:19,831 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 222 transitions. [2021-11-16 21:38:19,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-16 21:38:19,831 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 222 transitions. [2021-11-16 21:38:19,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-16 21:38:19,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:19,833 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:19,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-16 21:38:20,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:20,056 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:20,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:20,056 INFO L85 PathProgramCache]: Analyzing trace with hash -832782434, now seen corresponding path program 1 times [2021-11-16 21:38:20,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:20,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897179975] [2021-11-16 21:38:20,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:20,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:20,110 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:20,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760497726] [2021-11-16 21:38:20,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:20,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:20,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:20,112 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 21:38:20,136 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 21:38:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:20,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 2576 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-16 21:38:20,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-16 21:38:20,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:38:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-16 21:38:21,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:21,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897179975] [2021-11-16 21:38:21,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:21,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760497726] [2021-11-16 21:38:21,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760497726] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:38:21,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:38:21,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 11 [2021-11-16 21:38:21,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871664347] [2021-11-16 21:38:21,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:38:21,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 21:38:21,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:21,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 21:38:21,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-16 21:38:21,270 INFO L87 Difference]: Start difference. First operand 179 states and 222 transitions. Second operand has 11 states, 11 states have (on average 9.181818181818182) internal successors, (101), 7 states have internal predecessors, (101), 2 states have call successors, (23), 2 states have call predecessors, (23), 6 states have return successors, (25), 6 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-16 21:38:21,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:21,337 INFO L93 Difference]: Finished difference Result 286 states and 355 transitions. [2021-11-16 21:38:21,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 21:38:21,338 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.181818181818182) internal successors, (101), 7 states have internal predecessors, (101), 2 states have call successors, (23), 2 states have call predecessors, (23), 6 states have return successors, (25), 6 states have call predecessors, (25), 2 states have call successors, (25) Word has length 182 [2021-11-16 21:38:21,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:21,339 INFO L225 Difference]: With dead ends: 286 [2021-11-16 21:38:21,339 INFO L226 Difference]: Without dead ends: 182 [2021-11-16 21:38:21,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-16 21:38:21,341 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 3 mSDsluCounter, 1778 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1979 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:21,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1979 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:38:21,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-16 21:38:21,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2021-11-16 21:38:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 125 states have internal predecessors, (145), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 37 states have call predecessors, (41), 35 states have call successors, (41) [2021-11-16 21:38:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 222 transitions. [2021-11-16 21:38:21,352 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 222 transitions. Word has length 182 [2021-11-16 21:38:21,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:21,352 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 222 transitions. [2021-11-16 21:38:21,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.181818181818182) internal successors, (101), 7 states have internal predecessors, (101), 2 states have call successors, (23), 2 states have call predecessors, (23), 6 states have return successors, (25), 6 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-16 21:38:21,353 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 222 transitions. [2021-11-16 21:38:21,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-16 21:38:21,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:21,354 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:21,403 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 21:38:21,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-16 21:38:21,572 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:21,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:21,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1971957966, now seen corresponding path program 2 times [2021-11-16 21:38:21,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:21,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961473627] [2021-11-16 21:38:21,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:21,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:21,614 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:21,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798929423] [2021-11-16 21:38:21,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:38:21,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:21,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:21,616 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 21:38:21,617 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 21:38:22,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 21:38:22,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:38:22,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 2580 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-16 21:38:22,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:24,854 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|))))) is different from true [2021-11-16 21:38:32,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 21:38:32,086 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 5 [2021-11-16 21:38:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-16 21:38:32,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:38:32,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:32,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961473627] [2021-11-16 21:38:32,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:32,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798929423] [2021-11-16 21:38:32,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798929423] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:38:32,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:38:32,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-16 21:38:32,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226547676] [2021-11-16 21:38:32,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:38:32,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-16 21:38:32,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:32,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-16 21:38:32,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=131, Unknown=2, NotChecked=22, Total=182 [2021-11-16 21:38:32,260 INFO L87 Difference]: Start difference. First operand 180 states and 222 transitions. Second operand has 14 states, 14 states have (on average 7.142857142857143) internal successors, (100), 13 states have internal predecessors, (100), 7 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2021-11-16 21:38:34,320 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 21:38:35,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:35,210 INFO L93 Difference]: Finished difference Result 346 states and 434 transitions. [2021-11-16 21:38:35,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-16 21:38:35,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.142857142857143) internal successors, (100), 13 states have internal predecessors, (100), 7 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 185 [2021-11-16 21:38:35,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:35,212 INFO L225 Difference]: With dead ends: 346 [2021-11-16 21:38:35,212 INFO L226 Difference]: Without dead ends: 222 [2021-11-16 21:38:35,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=52, Invalid=256, Unknown=2, NotChecked=32, Total=342 [2021-11-16 21:38:35,214 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 100 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 657 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:35,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 1200 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 675 Invalid, 1 Unknown, 657 Unchecked, 2.8s Time] [2021-11-16 21:38:35,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-16 21:38:35,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 192. [2021-11-16 21:38:35,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 133 states have (on average 1.1804511278195489) internal successors, (157), 135 states have internal predecessors, (157), 36 states have call successors, (36), 18 states have call predecessors, (36), 22 states have return successors, (45), 39 states have call predecessors, (45), 35 states have call successors, (45) [2021-11-16 21:38:35,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 238 transitions. [2021-11-16 21:38:35,228 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 238 transitions. Word has length 185 [2021-11-16 21:38:35,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:35,229 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 238 transitions. [2021-11-16 21:38:35,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.142857142857143) internal successors, (100), 13 states have internal predecessors, (100), 7 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2021-11-16 21:38:35,229 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 238 transitions. [2021-11-16 21:38:35,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-16 21:38:35,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:35,230 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:35,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-16 21:38:35,443 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,SelfDestructingSolverStorable13 [2021-11-16 21:38:35,444 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:35,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:35,444 INFO L85 PathProgramCache]: Analyzing trace with hash -101731212, now seen corresponding path program 1 times [2021-11-16 21:38:35,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:35,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788612021] [2021-11-16 21:38:35,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:35,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:35,492 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:35,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753328735] [2021-11-16 21:38:35,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:35,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:35,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:35,494 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 21:38:35,495 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 21:38:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:35,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 2583 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-16 21:38:35,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-16 21:38:36,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:38:36,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:36,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788612021] [2021-11-16 21:38:36,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:36,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753328735] [2021-11-16 21:38:36,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753328735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:38:36,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:38:36,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-16 21:38:36,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637233108] [2021-11-16 21:38:36,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:38:36,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 21:38:36,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:36,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 21:38:36,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-16 21:38:36,245 INFO L87 Difference]: Start difference. First operand 192 states and 238 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-16 21:38:36,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:36,295 INFO L93 Difference]: Finished difference Result 324 states and 398 transitions. [2021-11-16 21:38:36,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 21:38:36,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 185 [2021-11-16 21:38:36,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:36,297 INFO L225 Difference]: With dead ends: 324 [2021-11-16 21:38:36,297 INFO L226 Difference]: Without dead ends: 202 [2021-11-16 21:38:36,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-16 21:38:36,298 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 9 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:36,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1147 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:38:36,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-16 21:38:36,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 196. [2021-11-16 21:38:36,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 137 states have (on average 1.1751824817518248) internal successors, (161), 139 states have internal predecessors, (161), 36 states have call successors, (36), 18 states have call predecessors, (36), 22 states have return successors, (45), 39 states have call predecessors, (45), 35 states have call successors, (45) [2021-11-16 21:38:36,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 242 transitions. [2021-11-16 21:38:36,308 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 242 transitions. Word has length 185 [2021-11-16 21:38:36,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:36,308 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 242 transitions. [2021-11-16 21:38:36,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-16 21:38:36,308 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 242 transitions. [2021-11-16 21:38:36,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-16 21:38:36,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:36,310 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:36,343 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 21:38:36,523 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,SelfDestructingSolverStorable14 [2021-11-16 21:38:36,523 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:36,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:36,524 INFO L85 PathProgramCache]: Analyzing trace with hash 382427316, now seen corresponding path program 1 times [2021-11-16 21:38:36,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:36,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969935908] [2021-11-16 21:38:36,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:36,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:36,569 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:36,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379663900] [2021-11-16 21:38:36,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:36,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:36,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:36,571 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 21:38:36,573 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 21:38:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:36,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 2575 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 21:38:36,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-16 21:38:37,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:38:37,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:37,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969935908] [2021-11-16 21:38:37,255 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:37,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379663900] [2021-11-16 21:38:37,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379663900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:38:37,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:38:37,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 21:38:37,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619088751] [2021-11-16 21:38:37,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:38:37,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 21:38:37,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:37,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 21:38:37,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 21:38:37,256 INFO L87 Difference]: Start difference. First operand 196 states and 242 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 21:38:37,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:37,284 INFO L93 Difference]: Finished difference Result 350 states and 438 transitions. [2021-11-16 21:38:37,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 21:38:37,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 185 [2021-11-16 21:38:37,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:37,286 INFO L225 Difference]: With dead ends: 350 [2021-11-16 21:38:37,287 INFO L226 Difference]: Without dead ends: 201 [2021-11-16 21:38:37,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 183 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 21:38:37,288 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 7 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 586 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 21:38:37,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 586 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:38:37,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-16 21:38:37,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2021-11-16 21:38:37,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 139 states have (on average 1.1726618705035972) internal successors, (163), 141 states have internal predecessors, (163), 36 states have call successors, (36), 18 states have call predecessors, (36), 22 states have return successors, (45), 39 states have call predecessors, (45), 35 states have call successors, (45) [2021-11-16 21:38:37,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 244 transitions. [2021-11-16 21:38:37,299 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 244 transitions. Word has length 185 [2021-11-16 21:38:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:37,302 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 244 transitions. [2021-11-16 21:38:37,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 21:38:37,302 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 244 transitions. [2021-11-16 21:38:37,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-16 21:38:37,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:37,304 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:37,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-16 21:38:37,531 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,SelfDestructingSolverStorable15 [2021-11-16 21:38:37,531 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:37,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:37,532 INFO L85 PathProgramCache]: Analyzing trace with hash -288102357, now seen corresponding path program 1 times [2021-11-16 21:38:37,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:37,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94808106] [2021-11-16 21:38:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:37,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:37,593 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:37,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764170665] [2021-11-16 21:38:37,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:37,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:37,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:37,601 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 21:38:37,621 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 21:38:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:38,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 2596 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-16 21:38:38,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:38,460 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-16 21:38:38,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:38:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-16 21:38:39,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:39,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94808106] [2021-11-16 21:38:39,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:39,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764170665] [2021-11-16 21:38:39,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764170665] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 21:38:39,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:38:39,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 17 [2021-11-16 21:38:39,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158187912] [2021-11-16 21:38:39,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:38:39,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 21:38:39,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:39,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 21:38:39,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-11-16 21:38:39,343 INFO L87 Difference]: Start difference. First operand 198 states and 244 transitions. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 8 states have internal predecessors, (98), 2 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 5 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-16 21:38:39,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:39,460 INFO L93 Difference]: Finished difference Result 355 states and 436 transitions. [2021-11-16 21:38:39,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-16 21:38:39,461 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 8 states have internal predecessors, (98), 2 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 5 states have call predecessors, (23), 2 states have call successors, (23) Word has length 191 [2021-11-16 21:38:39,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:39,462 INFO L225 Difference]: With dead ends: 355 [2021-11-16 21:38:39,463 INFO L226 Difference]: Without dead ends: 213 [2021-11-16 21:38:39,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 364 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-11-16 21:38:39,464 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 15 mSDsluCounter, 1892 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2107 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:39,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 2107 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:38:39,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-16 21:38:39,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 207. [2021-11-16 21:38:39,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 147 states have (on average 1.1700680272108843) internal successors, (172), 149 states have internal predecessors, (172), 36 states have call successors, (36), 18 states have call predecessors, (36), 23 states have return successors, (48), 40 states have call predecessors, (48), 35 states have call successors, (48) [2021-11-16 21:38:39,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 256 transitions. [2021-11-16 21:38:39,473 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 256 transitions. Word has length 191 [2021-11-16 21:38:39,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:39,474 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 256 transitions. [2021-11-16 21:38:39,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 8 states have internal predecessors, (98), 2 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 5 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-16 21:38:39,474 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 256 transitions. [2021-11-16 21:38:39,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-16 21:38:39,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:39,475 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:39,509 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 21:38:39,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:39,699 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:39,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:39,700 INFO L85 PathProgramCache]: Analyzing trace with hash -24510058, now seen corresponding path program 1 times [2021-11-16 21:38:39,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:39,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676857431] [2021-11-16 21:38:39,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:39,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:39,745 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:39,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829612327] [2021-11-16 21:38:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:39,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:39,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:39,747 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 21:38:39,748 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 21:38:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:40,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 2590 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-16 21:38:40,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-16 21:38:40,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:38:40,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:40,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676857431] [2021-11-16 21:38:40,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:40,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829612327] [2021-11-16 21:38:40,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829612327] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:38:40,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:38:40,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-16 21:38:40,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434311847] [2021-11-16 21:38:40,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:38:40,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 21:38:40,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:40,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 21:38:40,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-16 21:38:40,534 INFO L87 Difference]: Start difference. First operand 207 states and 256 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 21:38:42,872 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 21:38:43,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:43,049 INFO L93 Difference]: Finished difference Result 382 states and 482 transitions. [2021-11-16 21:38:43,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 21:38:43,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 187 [2021-11-16 21:38:43,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:43,051 INFO L225 Difference]: With dead ends: 382 [2021-11-16 21:38:43,051 INFO L226 Difference]: Without dead ends: 222 [2021-11-16 21:38:43,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-16 21:38:43,053 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 15 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:43,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 728 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-16 21:38:43,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-16 21:38:43,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 209. [2021-11-16 21:38:43,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 149 states have (on average 1.167785234899329) internal successors, (174), 151 states have internal predecessors, (174), 36 states have call successors, (36), 18 states have call predecessors, (36), 23 states have return successors, (48), 40 states have call predecessors, (48), 35 states have call successors, (48) [2021-11-16 21:38:43,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 258 transitions. [2021-11-16 21:38:43,067 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 258 transitions. Word has length 187 [2021-11-16 21:38:43,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:43,067 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 258 transitions. [2021-11-16 21:38:43,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 21:38:43,068 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 258 transitions. [2021-11-16 21:38:43,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-16 21:38:43,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:43,069 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:43,103 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 21:38:43,290 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,SelfDestructingSolverStorable17 [2021-11-16 21:38:43,290 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:43,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:43,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1901573288, now seen corresponding path program 1 times [2021-11-16 21:38:43,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:43,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605788191] [2021-11-16 21:38:43,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:43,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:43,334 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:43,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817718414] [2021-11-16 21:38:43,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:43,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:43,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:43,337 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 21:38:43,360 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 21:38:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:43,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 2585 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-16 21:38:43,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:44,055 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 5 [2021-11-16 21:38:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-16 21:38:44,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:38:44,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:44,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605788191] [2021-11-16 21:38:44,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:44,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817718414] [2021-11-16 21:38:44,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817718414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:38:44,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:38:44,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-16 21:38:44,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611496210] [2021-11-16 21:38:44,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:38:44,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 21:38:44,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:44,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 21:38:44,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-16 21:38:44,189 INFO L87 Difference]: Start difference. First operand 209 states and 258 transitions. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-16 21:38:44,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:44,998 INFO L93 Difference]: Finished difference Result 383 states and 471 transitions. [2021-11-16 21:38:44,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-16 21:38:44,999 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 187 [2021-11-16 21:38:44,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:45,000 INFO L225 Difference]: With dead ends: 383 [2021-11-16 21:38:45,000 INFO L226 Difference]: Without dead ends: 242 [2021-11-16 21:38:45,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-11-16 21:38:45,002 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 73 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:45,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 1580 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-16 21:38:45,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-16 21:38:45,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 210. [2021-11-16 21:38:45,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 150 states have (on average 1.1666666666666667) internal successors, (175), 152 states have internal predecessors, (175), 36 states have call successors, (36), 18 states have call predecessors, (36), 23 states have return successors, (48), 40 states have call predecessors, (48), 35 states have call successors, (48) [2021-11-16 21:38:45,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 259 transitions. [2021-11-16 21:38:45,015 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 259 transitions. Word has length 187 [2021-11-16 21:38:45,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:45,015 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 259 transitions. [2021-11-16 21:38:45,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-16 21:38:45,016 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 259 transitions. [2021-11-16 21:38:45,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-16 21:38:45,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:45,017 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:45,050 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 21:38:45,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:45,235 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:45,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:45,236 INFO L85 PathProgramCache]: Analyzing trace with hash -908019048, now seen corresponding path program 1 times [2021-11-16 21:38:45,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:45,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329994619] [2021-11-16 21:38:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:45,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:45,282 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:45,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261549947] [2021-11-16 21:38:45,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:45,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:45,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:45,284 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 21:38:45,286 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 21:38:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:45,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 2585 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-16 21:38:45,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:45,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-16 21:38:46,252 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-16 21:38:46,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-11-16 21:38:48,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:38:48,318 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 27 treesize of output 15 [2021-11-16 21:39:01,107 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|))))) is different from true [2021-11-16 21:39:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 52 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 3 not checked. [2021-11-16 21:39:06,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:39:07,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:39:07,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329994619] [2021-11-16 21:39:07,758 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:39:07,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261549947] [2021-11-16 21:39:07,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261549947] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:39:07,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:39:07,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-11-16 21:39:07,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753232515] [2021-11-16 21:39:07,759 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-16 21:39:07,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-16 21:39:07,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:39:07,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-16 21:39:07,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=871, Unknown=11, NotChecked=60, Total=1056 [2021-11-16 21:39:07,760 INFO L87 Difference]: Start difference. First operand 210 states and 259 transitions. Second operand has 32 states, 28 states have (on average 4.214285714285714) internal successors, (118), 28 states have internal predecessors, (118), 12 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2021-11-16 21:39:09,782 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 21:39:11,606 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:39:12,765 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:39:18,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:39:18,599 INFO L93 Difference]: Finished difference Result 408 states and 508 transitions. [2021-11-16 21:39:18,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-16 21:39:18,600 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 4.214285714285714) internal successors, (118), 28 states have internal predecessors, (118), 12 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) Word has length 187 [2021-11-16 21:39:18,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:39:18,601 INFO L225 Difference]: With dead ends: 408 [2021-11-16 21:39:18,601 INFO L226 Difference]: Without dead ends: 278 [2021-11-16 21:39:18,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 223 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=159, Invalid=1314, Unknown=13, NotChecked=74, Total=1560 [2021-11-16 21:39:18,603 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 166 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 112 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 2371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 1385 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-16 21:39:18,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 1358 Invalid, 2371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 873 Invalid, 1 Unknown, 1385 Unchecked, 5.8s Time] [2021-11-16 21:39:18,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-16 21:39:18,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 247. [2021-11-16 21:39:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 178 states have (on average 1.1573033707865168) internal successors, (206), 182 states have internal predecessors, (206), 39 states have call successors, (39), 21 states have call predecessors, (39), 29 states have return successors, (61), 44 states have call predecessors, (61), 38 states have call successors, (61) [2021-11-16 21:39:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 306 transitions. [2021-11-16 21:39:18,616 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 306 transitions. Word has length 187 [2021-11-16 21:39:18,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:39:18,617 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 306 transitions. [2021-11-16 21:39:18,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 4.214285714285714) internal successors, (118), 28 states have internal predecessors, (118), 12 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2021-11-16 21:39:18,617 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 306 transitions. [2021-11-16 21:39:18,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-16 21:39:18,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:39:18,619 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:39:18,657 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 21:39:18,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:39:18,840 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:39:18,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:39:18,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1752761233, now seen corresponding path program 1 times [2021-11-16 21:39:18,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:39:18,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669995948] [2021-11-16 21:39:18,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:39:18,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:39:18,889 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:39:18,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893712917] [2021-11-16 21:39:18,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:39:18,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:39:18,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:39:18,891 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 21:39:18,896 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 21:39:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:39:19,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 2608 conjuncts, 150 conjunts are in the unsatisfiable core [2021-11-16 21:39:19,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:39:19,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-16 21:39:19,680 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-16 21:39:19,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-11-16 21:39:22,211 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-16 21:39:22,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-11-16 21:39:22,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-16 21:39:24,387 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-16 21:39:24,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-16 21:39:24,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:39:24,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:39:24,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:39:24,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:39:24,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:39:24,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:39:24,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-16 21:39:28,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:39:28,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:39:28,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:39:28,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-16 21:39:33,782 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|))))) is different from true [2021-11-16 21:39:58,212 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|))))) is different from true [2021-11-16 21:40:00,223 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|))))) is different from true [2021-11-16 21:40:25,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:40:25,537 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 134 treesize of output 110 [2021-11-16 21:40:25,550 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-16 21:40:25,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 1 [2021-11-16 21:40:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 41 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 10 not checked. [2021-11-16 21:40:25,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:40:28,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:40:28,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669995948] [2021-11-16 21:40:28,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:40:28,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893712917] [2021-11-16 21:40:28,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893712917] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:40:28,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:40:28,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2021-11-16 21:40:28,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369880386] [2021-11-16 21:40:28,520 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-16 21:40:28,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-16 21:40:28,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:40:28,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-16 21:40:28,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1535, Unknown=30, NotChecked=246, Total=1980 [2021-11-16 21:40:28,522 INFO L87 Difference]: Start difference. First operand 247 states and 306 transitions. Second operand has 44 states, 38 states have (on average 3.210526315789474) internal successors, (122), 38 states have internal predecessors, (122), 15 states have call successors, (27), 10 states have call predecessors, (27), 15 states have return successors, (26), 14 states have call predecessors, (26), 15 states have call successors, (26) [2021-11-16 21:40:34,171 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|))))) (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|)))))) is different from true [2021-11-16 21:41:11,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:41:11,098 INFO L93 Difference]: Finished difference Result 467 states and 582 transitions. [2021-11-16 21:41:11,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-16 21:41:11,099 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 38 states have (on average 3.210526315789474) internal successors, (122), 38 states have internal predecessors, (122), 15 states have call successors, (27), 10 states have call predecessors, (27), 15 states have return successors, (26), 14 states have call predecessors, (26), 15 states have call successors, (26) Word has length 193 [2021-11-16 21:41:11,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:41:11,101 INFO L225 Difference]: With dead ends: 467 [2021-11-16 21:41:11,101 INFO L226 Difference]: Without dead ends: 332 [2021-11-16 21:41:11,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 213 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 105.8s TimeCoverageRelationStatistics Valid=242, Invalid=2480, Unknown=50, NotChecked=420, Total=3192 [2021-11-16 21:41:11,102 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 181 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1746 SdHoareTripleChecker+Invalid, 3958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2875 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-16 21:41:11,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 1746 Invalid, 3958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1008 Invalid, 0 Unknown, 2875 Unchecked, 1.8s Time] [2021-11-16 21:41:11,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-16 21:41:11,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 291. [2021-11-16 21:41:11,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 207 states have (on average 1.1545893719806763) internal successors, (239), 213 states have internal predecessors, (239), 46 states have call successors, (46), 27 states have call predecessors, (46), 37 states have return successors, (78), 51 states have call predecessors, (78), 45 states have call successors, (78) [2021-11-16 21:41:11,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 363 transitions. [2021-11-16 21:41:11,117 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 363 transitions. Word has length 193 [2021-11-16 21:41:11,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:41:11,118 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 363 transitions. [2021-11-16 21:41:11,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 38 states have (on average 3.210526315789474) internal successors, (122), 38 states have internal predecessors, (122), 15 states have call successors, (27), 10 states have call predecessors, (27), 15 states have return successors, (26), 14 states have call predecessors, (26), 15 states have call successors, (26) [2021-11-16 21:41:11,118 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 363 transitions. [2021-11-16 21:41:11,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-16 21:41:11,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:41:11,120 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:41:11,154 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 21:41:11,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:41:11,354 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:41:11,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:41:11,355 INFO L85 PathProgramCache]: Analyzing trace with hash -381878215, now seen corresponding path program 1 times [2021-11-16 21:41:11,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:41:11,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023916281] [2021-11-16 21:41:11,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:41:11,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:41:11,399 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:41:11,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162401942] [2021-11-16 21:41:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:41:11,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:41:11,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:41:11,401 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 21:41:11,409 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 21:41:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:41:11,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 2610 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-16 21:41:11,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:41:14,464 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (select (select |c_#memory_$Pointer$.offset| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset|)))) (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (select (select |c_#memory_$Pointer$.base| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset|))) |c_#memory_$Pointer$.base|))) is different from true [2021-11-16 21:41:16,595 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 (select (select |c_#memory_$Pointer$.base| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0))) |c_#memory_$Pointer$.base|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 (select (select |c_#memory_$Pointer$.offset| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0)))))) is different from true [2021-11-16 21:41:16,790 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-16 21:41:16,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 50 [2021-11-16 21:41:16,865 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-16 21:41:16,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 48 [2021-11-16 21:41:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 9 not checked. [2021-11-16 21:41:18,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:41:20,933 INFO L354 Elim1Store]: treesize reduction 35, result has 23.9 percent of original size [2021-11-16 21:41:20,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 60 [2021-11-16 21:41:20,948 INFO L354 Elim1Store]: treesize reduction 37, result has 2.6 percent of original size [2021-11-16 21:41:20,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 34 [2021-11-16 21:41:20,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-11-16 21:41:20,965 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 17 treesize of output 11 [2021-11-16 21:41:30,693 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_109| Int) (|v_aws_priority_queue_is_valid_#in~queue#1.offset_BEFORE_CALL_11| Int) (v_DerPreprocessor_5 Int) (v_DerPreprocessor_4 Int) (|v_aws_priority_queue_is_valid_#in~queue#1.base_BEFORE_CALL_14| Int)) (let ((.cse0 (+ 40 |v_aws_priority_queue_is_valid_#in~queue#1.offset_BEFORE_CALL_11|))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_109| (store (select |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_109|) |c_aws_array_list_is_valid_~#required_size~0.offset| v_DerPreprocessor_4)) |v_aws_priority_queue_is_valid_#in~queue#1.base_BEFORE_CALL_14|) .cse0) 0)) (and (= (select (select |c_old(#memory_$Pointer$.offset)| |v_aws_priority_queue_is_valid_#in~queue#1.base_BEFORE_CALL_14|) .cse0) 0) (= (select (select |c_old(#memory_$Pointer$.base)| |v_aws_priority_queue_is_valid_#in~queue#1.base_BEFORE_CALL_14|) .cse0) 0)) (= .cse0 0) (not (= (select (select (store |c_#memory_$Pointer$.offset| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_109| (store (select |c_#memory_$Pointer$.offset| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_109|) |c_aws_array_list_is_valid_~#required_size~0.offset| v_DerPreprocessor_5)) |v_aws_priority_queue_is_valid_#in~queue#1.base_BEFORE_CALL_14|) .cse0) 0))))) is different from false [2021-11-16 21:41:30,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:41:30,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023916281] [2021-11-16 21:41:30,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:41:30,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162401942] [2021-11-16 21:41:30,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162401942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:41:30,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:41:30,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-16 21:41:30,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973193534] [2021-11-16 21:41:30,699 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-16 21:41:30,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-16 21:41:30,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:41:30,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-16 21:41:30,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=628, Unknown=4, NotChecked=156, Total=870 [2021-11-16 21:41:30,700 INFO L87 Difference]: Start difference. First operand 291 states and 363 transitions. Second operand has 22 states, 20 states have (on average 6.05) internal successors, (121), 20 states have internal predecessors, (121), 12 states have call successors, (27), 4 states have call predecessors, (27), 8 states have return successors, (26), 11 states have call predecessors, (26), 12 states have call successors, (26) [2021-11-16 21:41:32,721 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 21:41:34,201 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:41:35,331 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:41:49,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:41:49,711 INFO L93 Difference]: Finished difference Result 480 states and 606 transitions. [2021-11-16 21:41:49,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-16 21:41:49,712 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 6.05) internal successors, (121), 20 states have internal predecessors, (121), 12 states have call successors, (27), 4 states have call predecessors, (27), 8 states have return successors, (26), 11 states have call predecessors, (26), 12 states have call successors, (26) Word has length 195 [2021-11-16 21:41:49,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:41:49,714 INFO L225 Difference]: With dead ends: 480 [2021-11-16 21:41:49,714 INFO L226 Difference]: Without dead ends: 350 [2021-11-16 21:41:49,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 262 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=174, Invalid=1472, Unknown=6, NotChecked=240, Total=1892 [2021-11-16 21:41:49,715 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 117 mSDsluCounter, 1713 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1915 SdHoareTripleChecker+Invalid, 2531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 747 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:41:49,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1915 Invalid, 2531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1731 Invalid, 1 Unknown, 747 Unchecked, 11.2s Time] [2021-11-16 21:41:49,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-11-16 21:41:49,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 345. [2021-11-16 21:41:49,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 250 states have (on average 1.156) internal successors, (289), 258 states have internal predecessors, (289), 52 states have call successors, (52), 28 states have call predecessors, (52), 42 states have return successors, (102), 59 states have call predecessors, (102), 51 states have call successors, (102) [2021-11-16 21:41:49,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 443 transitions. [2021-11-16 21:41:49,733 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 443 transitions. Word has length 195 [2021-11-16 21:41:49,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:41:49,734 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 443 transitions. [2021-11-16 21:41:49,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 6.05) internal successors, (121), 20 states have internal predecessors, (121), 12 states have call successors, (27), 4 states have call predecessors, (27), 8 states have return successors, (26), 11 states have call predecessors, (26), 12 states have call successors, (26) [2021-11-16 21:41:49,734 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 443 transitions. [2021-11-16 21:41:49,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-16 21:41:49,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:41:49,736 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:41:49,766 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 21:41:49,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:41:49,959 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:41:49,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:41:49,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1951131714, now seen corresponding path program 1 times [2021-11-16 21:41:49,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:41:49,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162456360] [2021-11-16 21:41:49,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:41:49,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:41:49,995 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:41:49,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976054992] [2021-11-16 21:41:49,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:41:49,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:41:49,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:41:49,997 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 21:41:49,999 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 21:41:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:41:50,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 2590 conjuncts, 115 conjunts are in the unsatisfiable core [2021-11-16 21:41:50,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:41:54,558 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (select (select |c_#memory_$Pointer$.offset| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset|)))) (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (select (select |c_#memory_$Pointer$.base| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset|))) |c_#memory_$Pointer$.base|))) is different from true [2021-11-16 21:41:56,773 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 (select (select |c_#memory_$Pointer$.base| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0))) |c_#memory_$Pointer$.base|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 (select (select |c_#memory_$Pointer$.offset| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0)))))) is different from true [2021-11-16 21:41:57,007 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-16 21:41:57,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 58 [2021-11-16 21:41:57,089 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-16 21:41:57,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 56 [2021-11-16 21:42:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 34 proven. 8 refuted. 0 times theorem prover too weak. 70 trivial. 9 not checked. [2021-11-16 21:42:00,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:42:06,606 INFO L354 Elim1Store]: treesize reduction 35, result has 23.9 percent of original size [2021-11-16 21:42:06,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 265 treesize of output 247 [2021-11-16 21:42:06,635 INFO L354 Elim1Store]: treesize reduction 37, result has 2.6 percent of original size [2021-11-16 21:42:06,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 215 [2021-11-16 21:42:06,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-11-16 21:42:06,664 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 17 treesize of output 11 [2021-11-16 21:42:18,168 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_9 Int) (v_DerPreprocessor_8 Int) (|v_aws_priority_queue_is_valid_#in~queue#1.base_BEFORE_CALL_17| Int) (|v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_130| Int) (|v_aws_priority_queue_is_valid_#in~queue#1.offset_BEFORE_CALL_14| Int)) (let ((.cse0 (+ 40 |v_aws_priority_queue_is_valid_#in~queue#1.offset_BEFORE_CALL_14|))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_130| (store (select |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_130|) |c_aws_array_list_is_valid_~#required_size~0.offset| v_DerPreprocessor_8)) |v_aws_priority_queue_is_valid_#in~queue#1.base_BEFORE_CALL_17|) .cse0) 0)) (= .cse0 0) (and (= (select (select |c_old(#memory_$Pointer$.offset)| |v_aws_priority_queue_is_valid_#in~queue#1.base_BEFORE_CALL_17|) .cse0) 0) (= (select (select |c_old(#memory_$Pointer$.base)| |v_aws_priority_queue_is_valid_#in~queue#1.base_BEFORE_CALL_17|) .cse0) 0)) (not (= (select (select (store |c_#memory_$Pointer$.offset| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_130| (store (select |c_#memory_$Pointer$.offset| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_130|) |c_aws_array_list_is_valid_~#required_size~0.offset| v_DerPreprocessor_9)) |v_aws_priority_queue_is_valid_#in~queue#1.base_BEFORE_CALL_17|) .cse0) 0))))) is different from false [2021-11-16 21:42:18,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:42:18,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162456360] [2021-11-16 21:42:18,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:42:18,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976054992] [2021-11-16 21:42:18,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976054992] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:42:18,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:42:18,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-11-16 21:42:18,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721772927] [2021-11-16 21:42:18,174 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-16 21:42:18,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-16 21:42:18,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:42:18,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-16 21:42:18,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1665, Unknown=4, NotChecked=252, Total=2070 [2021-11-16 21:42:18,177 INFO L87 Difference]: Start difference. First operand 345 states and 443 transitions. Second operand has 31 states, 27 states have (on average 4.185185185185185) internal successors, (113), 26 states have internal predecessors, (113), 12 states have call successors, (24), 3 states have call predecessors, (24), 10 states have return successors, (23), 13 states have call predecessors, (23), 12 states have call successors, (23) [2021-11-16 21:42:19,759 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:42:22,501 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:42:24,746 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:43:02,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:43:02,791 INFO L93 Difference]: Finished difference Result 541 states and 698 transitions. [2021-11-16 21:43:02,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-16 21:43:02,792 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 4.185185185185185) internal successors, (113), 26 states have internal predecessors, (113), 12 states have call successors, (24), 3 states have call predecessors, (24), 10 states have return successors, (23), 13 states have call predecessors, (23), 12 states have call successors, (23) Word has length 189 [2021-11-16 21:43:02,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:43:02,794 INFO L225 Difference]: With dead ends: 541 [2021-11-16 21:43:02,794 INFO L226 Difference]: Without dead ends: 393 [2021-11-16 21:43:02,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 39.4s TimeCoverageRelationStatistics Valid=316, Invalid=3978, Unknown=8, NotChecked=390, Total=4692 [2021-11-16 21:43:02,797 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 116 mSDsluCounter, 2558 mSDsCounter, 0 mSdLazyCounter, 2875 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 2749 SdHoareTripleChecker+Invalid, 3514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 578 IncrementalHoareTripleChecker+Unchecked, 21.7s IncrementalHoareTripleChecker+Time [2021-11-16 21:43:02,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 2749 Invalid, 3514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2875 Invalid, 0 Unknown, 578 Unchecked, 21.7s Time] [2021-11-16 21:43:02,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-16 21:43:02,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 379. [2021-11-16 21:43:02,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 279 states have (on average 1.157706093189964) internal successors, (323), 288 states have internal predecessors, (323), 55 states have call successors, (55), 28 states have call predecessors, (55), 44 states have return successors, (119), 63 states have call predecessors, (119), 54 states have call successors, (119) [2021-11-16 21:43:02,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 497 transitions. [2021-11-16 21:43:02,817 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 497 transitions. Word has length 189 [2021-11-16 21:43:02,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:43:02,818 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 497 transitions. [2021-11-16 21:43:02,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 4.185185185185185) internal successors, (113), 26 states have internal predecessors, (113), 12 states have call successors, (24), 3 states have call predecessors, (24), 10 states have return successors, (23), 13 states have call predecessors, (23), 12 states have call successors, (23) [2021-11-16 21:43:02,818 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 497 transitions. [2021-11-16 21:43:02,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-16 21:43:02,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:43:02,820 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:43:02,851 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 21:43:03,041 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,SelfDestructingSolverStorable22 [2021-11-16 21:43:03,042 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:43:03,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:43:03,042 INFO L85 PathProgramCache]: Analyzing trace with hash -2024745282, now seen corresponding path program 1 times [2021-11-16 21:43:03,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:43:03,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254551438] [2021-11-16 21:43:03,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:43:03,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:43:03,079 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:43:03,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144267771] [2021-11-16 21:43:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:43:03,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:43:03,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:43:03,081 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 21:43:03,083 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 21:43:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:43:03,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 2580 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-16 21:43:03,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:43:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-16 21:43:04,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:43:04,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:43:04,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254551438] [2021-11-16 21:43:04,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:43:04,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144267771] [2021-11-16 21:43:04,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144267771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:43:04,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:43:04,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-16 21:43:04,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377323561] [2021-11-16 21:43:04,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:43:04,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 21:43:04,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:43:04,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 21:43:04,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-16 21:43:04,592 INFO L87 Difference]: Start difference. First operand 379 states and 497 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-16 21:43:06,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:43:06,306 INFO L93 Difference]: Finished difference Result 562 states and 737 transitions. [2021-11-16 21:43:06,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 21:43:06,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 189 [2021-11-16 21:43:06,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:43:06,310 INFO L225 Difference]: With dead ends: 562 [2021-11-16 21:43:06,310 INFO L226 Difference]: Without dead ends: 374 [2021-11-16 21:43:06,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-16 21:43:06,311 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 7 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-16 21:43:06,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 743 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-16 21:43:06,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-16 21:43:06,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2021-11-16 21:43:06,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 275 states have (on average 1.1527272727272728) internal successors, (317), 283 states have internal predecessors, (317), 55 states have call successors, (55), 28 states have call predecessors, (55), 43 states have return successors, (113), 63 states have call predecessors, (113), 54 states have call successors, (113) [2021-11-16 21:43:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 485 transitions. [2021-11-16 21:43:06,333 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 485 transitions. Word has length 189 [2021-11-16 21:43:06,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:43:06,334 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 485 transitions. [2021-11-16 21:43:06,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-16 21:43:06,334 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 485 transitions. [2021-11-16 21:43:06,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-16 21:43:06,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:43:06,337 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:43:06,367 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 21:43:06,555 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,SelfDestructingSolverStorable23 [2021-11-16 21:43:06,555 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:43:06,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:43:06,556 INFO L85 PathProgramCache]: Analyzing trace with hash -302742596, now seen corresponding path program 1 times [2021-11-16 21:43:06,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:43:06,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206359374] [2021-11-16 21:43:06,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:43:06,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:43:06,612 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:43:06,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099729157] [2021-11-16 21:43:06,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:43:06,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:43:06,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:43:06,614 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 21:43:06,616 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 21:43:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:43:07,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 2585 conjuncts, 123 conjunts are in the unsatisfiable core [2021-11-16 21:43:07,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:43:07,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-16 21:43:08,842 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-16 21:43:08,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-16 21:43:08,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:43:08,881 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 21 treesize of output 20 [2021-11-16 21:43:26,541 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-16 21:43:26,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2021-11-16 21:43:26,610 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-16 21:43:26,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-16 21:43:26,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:43:26,705 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 21 treesize of output 20 [2021-11-16 21:43:26,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:43:26,767 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 21 treesize of output 20 [2021-11-16 21:43:27,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 34 treesize of output 32 [2021-11-16 21:43:27,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:43:27,241 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 29 treesize of output 21 [2021-11-16 21:43:27,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:43:27,254 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 15 treesize of output 7 [2021-11-16 21:43:34,610 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int)) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset|)))) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (select (select |c_#memory_$Pointer$.base| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset|))) |c_#memory_$Pointer$.base|))) is different from true [2021-11-16 21:44:00,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:44:00,446 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 86 treesize of output 74 [2021-11-16 21:44:00,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:44:00,471 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 88 treesize of output 76 [2021-11-16 21:44:00,501 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-16 21:44:00,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 1 [2021-11-16 21:44:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 39 proven. 37 refuted. 3 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-16 21:44:01,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:44:04,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:44:04,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206359374] [2021-11-16 21:44:04,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:44:04,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099729157] [2021-11-16 21:44:04,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099729157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:44:04,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:44:04,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-11-16 21:44:04,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23894576] [2021-11-16 21:44:04,624 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-16 21:44:04,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-16 21:44:04,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:44:04,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-16 21:44:04,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1003, Unknown=17, NotChecked=64, Total=1190 [2021-11-16 21:44:04,627 INFO L87 Difference]: Start difference. First operand 374 states and 485 transitions. Second operand has 34 states, 31 states have (on average 3.870967741935484) internal successors, (120), 28 states have internal predecessors, (120), 13 states have call successors, (26), 7 states have call predecessors, (26), 11 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) [2021-11-16 21:45:03,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:45:03,734 INFO L93 Difference]: Finished difference Result 592 states and 760 transitions. [2021-11-16 21:45:03,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-16 21:45:03,735 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 3.870967741935484) internal successors, (120), 28 states have internal predecessors, (120), 13 states have call successors, (26), 7 states have call predecessors, (26), 11 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) Word has length 189 [2021-11-16 21:45:03,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:45:03,738 INFO L225 Difference]: With dead ends: 592 [2021-11-16 21:45:03,738 INFO L226 Difference]: Without dead ends: 438 [2021-11-16 21:45:03,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 223 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 97.8s TimeCoverageRelationStatistics Valid=233, Invalid=2087, Unknown=36, NotChecked=94, Total=2450 [2021-11-16 21:45:03,740 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 113 mSDsluCounter, 2045 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 2226 SdHoareTripleChecker+Invalid, 2946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1598 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:45:03,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 2226 Invalid, 2946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1281 Invalid, 0 Unknown, 1598 Unchecked, 9.2s Time] [2021-11-16 21:45:03,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-16 21:45:03,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 394. [2021-11-16 21:45:03,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 292 states have (on average 1.154109589041096) internal successors, (337), 300 states have internal predecessors, (337), 57 states have call successors, (57), 28 states have call predecessors, (57), 44 states have return successors, (124), 66 states have call predecessors, (124), 56 states have call successors, (124) [2021-11-16 21:45:03,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 518 transitions. [2021-11-16 21:45:03,770 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 518 transitions. Word has length 189 [2021-11-16 21:45:03,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:45:03,771 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 518 transitions. [2021-11-16 21:45:03,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 3.870967741935484) internal successors, (120), 28 states have internal predecessors, (120), 13 states have call successors, (26), 7 states have call predecessors, (26), 11 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) [2021-11-16 21:45:03,772 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 518 transitions. [2021-11-16 21:45:03,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-16 21:45:03,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:45:03,779 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:45:03,811 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 21:45:04,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:45:04,004 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:45:04,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:45:04,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1201566325, now seen corresponding path program 1 times [2021-11-16 21:45:04,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:45:04,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722393159] [2021-11-16 21:45:04,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:45:04,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:45:04,036 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:45:04,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966472295] [2021-11-16 21:45:04,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:45:04,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:45:04,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:45:04,038 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 21:45:04,040 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 21:45:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:45:04,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 2608 conjuncts, 122 conjunts are in the unsatisfiable core [2021-11-16 21:45:04,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:45:04,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-16 21:45:06,275 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-16 21:45:06,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-16 21:45:06,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:45:06,305 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 21 treesize of output 20 [2021-11-16 21:45:14,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2021-11-16 21:45:14,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-16 21:45:14,224 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 21:45:25,191 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-16 21:45:25,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-16 21:45:25,358 INFO L354 Elim1Store]: treesize reduction 74, result has 20.4 percent of original size [2021-11-16 21:45:25,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 59 [2021-11-16 21:45:25,495 INFO L354 Elim1Store]: treesize reduction 74, result has 20.4 percent of original size [2021-11-16 21:45:25,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 43 [2021-11-16 21:45:26,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:45:26,014 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 21 treesize of output 20 [2021-11-16 21:45:26,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:45:26,052 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 21 treesize of output 20 [2021-11-16 21:45:26,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:45:26,657 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 43 treesize of output 35 [2021-11-16 21:45:26,670 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-16 21:45:26,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-11-16 21:45:26,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:45:26,685 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 15 treesize of output 7 [2021-11-16 21:45:30,092 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int)) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset|)))) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (select (select |c_#memory_$Pointer$.base| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset|))) |c_#memory_$Pointer$.base|))) is different from true [2021-11-16 21:46:06,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:46:06,389 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 95 treesize of output 83 [2021-11-16 21:46:06,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:46:06,401 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 97 treesize of output 85 [2021-11-16 21:46:06,424 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-16 21:46:06,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 1 [2021-11-16 21:46:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 39 proven. 30 refuted. 3 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-16 21:46:06,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:46:10,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:46:10,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722393159] [2021-11-16 21:46:10,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:46:10,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966472295] [2021-11-16 21:46:10,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966472295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:46:10,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:46:10,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-11-16 21:46:10,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887515761] [2021-11-16 21:46:10,191 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-16 21:46:10,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-16 21:46:10,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:46:10,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-16 21:46:10,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1127, Unknown=16, NotChecked=68, Total=1332 [2021-11-16 21:46:10,192 INFO L87 Difference]: Start difference. First operand 394 states and 518 transitions. Second operand has 36 states, 32 states have (on average 3.875) internal successors, (124), 30 states have internal predecessors, (124), 15 states have call successors, (27), 7 states have call predecessors, (27), 12 states have return successors, (26), 13 states have call predecessors, (26), 15 states have call successors, (26) [2021-11-16 21:46:12,217 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 21:46:34,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:46:34,346 INFO L93 Difference]: Finished difference Result 592 states and 767 transitions. [2021-11-16 21:46:34,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-16 21:46:34,347 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 3.875) internal successors, (124), 30 states have internal predecessors, (124), 15 states have call successors, (27), 7 states have call predecessors, (27), 12 states have return successors, (26), 13 states have call predecessors, (26), 15 states have call successors, (26) Word has length 195 [2021-11-16 21:46:34,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:46:34,349 INFO L225 Difference]: With dead ends: 592 [2021-11-16 21:46:34,349 INFO L226 Difference]: Without dead ends: 438 [2021-11-16 21:46:34,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 224 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 73.4s TimeCoverageRelationStatistics Valid=242, Invalid=2292, Unknown=20, NotChecked=98, Total=2652 [2021-11-16 21:46:34,351 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 206 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 154 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1827 SdHoareTripleChecker+Invalid, 2371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 1254 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-16 21:46:34,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1827 Invalid, 2371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 962 Invalid, 1 Unknown, 1254 Unchecked, 6.8s Time] [2021-11-16 21:46:34,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-16 21:46:34,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 397. [2021-11-16 21:46:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 294 states have (on average 1.153061224489796) internal successors, (339), 303 states have internal predecessors, (339), 57 states have call successors, (57), 28 states have call predecessors, (57), 45 states have return successors, (128), 66 states have call predecessors, (128), 56 states have call successors, (128) [2021-11-16 21:46:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 524 transitions. [2021-11-16 21:46:34,383 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 524 transitions. Word has length 195 [2021-11-16 21:46:34,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:46:34,383 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 524 transitions. [2021-11-16 21:46:34,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 3.875) internal successors, (124), 30 states have internal predecessors, (124), 15 states have call successors, (27), 7 states have call predecessors, (27), 12 states have return successors, (26), 13 states have call predecessors, (26), 15 states have call successors, (26) [2021-11-16 21:46:34,384 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 524 transitions. [2021-11-16 21:46:34,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-16 21:46:34,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:46:34,386 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:46:34,418 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 21:46:34,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:46:34,600 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:46:34,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:46:34,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1200052392, now seen corresponding path program 1 times [2021-11-16 21:46:34,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:46:34,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397004261] [2021-11-16 21:46:34,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:46:34,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:46:34,636 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:46:34,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303636282] [2021-11-16 21:46:34,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:46:34,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:46:34,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:46:34,637 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 21:46:34,639 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 21:46:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:46:35,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 2621 conjuncts, 181 conjunts are in the unsatisfiable core [2021-11-16 21:46:35,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:46:37,091 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-16 21:46:37,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-16 21:46:37,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:46:37,132 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 24 treesize of output 23 [2021-11-16 21:46:52,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-16 21:46:52,241 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 21:46:52,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-16 21:46:52,369 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 21:46:54,573 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ensure_array_list_has_allocated_data_member_#t~ret556.base_6| Int) (|v_ensure_array_list_has_allocated_data_member_#t~ret556.offset_6| Int) (|v_ensure_array_list_has_allocated_data_member_#t~ite559.offset_6| Int) (ensure_array_list_has_allocated_data_member_~list.offset Int) (|v_ensure_array_list_has_allocated_data_member_#t~ite559.base_6| Int)) (let ((.cse0 (+ ensure_array_list_has_allocated_data_member_~list.offset 32))) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_ensure_array_list_has_allocated_data_member_#in~list.base| (store (store (select |c_old(#memory_$Pointer$.offset)| |c_ensure_array_list_has_allocated_data_member_#in~list.base|) .cse0 |v_ensure_array_list_has_allocated_data_member_#t~ret556.offset_6|) ensure_array_list_has_allocated_data_member_~list.offset |v_ensure_array_list_has_allocated_data_member_#t~ite559.offset_6|))) (= (store |c_old(#memory_$Pointer$.base)| |c_ensure_array_list_has_allocated_data_member_#in~list.base| (store (store (select |c_old(#memory_$Pointer$.base)| |c_ensure_array_list_has_allocated_data_member_#in~list.base|) .cse0 |v_ensure_array_list_has_allocated_data_member_#t~ret556.base_6|) ensure_array_list_has_allocated_data_member_~list.offset |v_ensure_array_list_has_allocated_data_member_#t~ite559.base_6|)) |c_#memory_$Pointer$.base|) (<= |c_ensure_array_list_has_allocated_data_member_#in~list.offset| ensure_array_list_has_allocated_data_member_~list.offset)))) is different from true [2021-11-16 21:46:54,767 INFO L354 Elim1Store]: treesize reduction 74, result has 20.4 percent of original size [2021-11-16 21:46:54,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 68 [2021-11-16 21:46:54,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:46:54,940 INFO L354 Elim1Store]: treesize reduction 126, result has 18.2 percent of original size [2021-11-16 21:46:54,941 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 3 case distinctions, treesize of input 49 treesize of output 55 [2021-11-16 21:46:55,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:46:55,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:46:55,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:46:55,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:46:55,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-16 21:46:55,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:46:55,084 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 21 treesize of output 20 [2021-11-16 21:46:55,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:46:55,403 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 36 treesize of output 28 [2021-11-16 21:46:55,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:46:55,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 10 [2021-11-16 21:46:58,708 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (select (select |c_#memory_$Pointer$.offset| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset|)))) (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (select (select |c_#memory_$Pointer$.base| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset|))) |c_#memory_$Pointer$.base|))) is different from true [2021-11-16 21:49:39,795 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (and (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (select (select |c_#memory_$Pointer$.base| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset|))) |c_#memory_$Pointer$.base|) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|)))))) is different from true [2021-11-16 21:49:39,881 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 29 treesize of output 25 [2021-11-16 21:50:14,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:50:14,752 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 122 treesize of output 114 [2021-11-16 21:50:26,382 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (|v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_145| Int) (v_DerPreprocessor_19 Int)) (let ((.cse0 (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 v_DerPreprocessor_19)))) (and (or (exists ((v_DerPreprocessor_18 Int)) (not (= (select (select (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 v_DerPreprocessor_18)) |c_aws_priority_queue_is_valid_#in~queue#1.base|) (+ 40 |c_aws_priority_queue_is_valid_#in~queue#1.offset|)) 0))) (not (= (select (select .cse0 |c_aws_priority_queue_is_valid_#in~queue#1.base|) (+ 40 |c_aws_priority_queue_is_valid_#in~queue#1.offset|)) 0))) (= |c_#memory_$Pointer$.base| (store .cse0 |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_145| (store (select .cse0 |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_145|) 0 (select (select |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_145|) 0))))))) is different from true [2021-11-16 21:50:27,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:50:27,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:50:27,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:50:27,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:50:27,039 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-16 21:50:27,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 102 treesize of output 67 [2021-11-16 21:50:27,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:50:27,606 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 41 proven. 27 refuted. 2 times theorem prover too weak. 42 trivial. 5 not checked. [2021-11-16 21:50:27,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:51:28,037 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 270 treesize of output 252 [2021-11-16 21:51:31,518 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_22 Int) (|v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_162| Int) (v_DerPreprocessor_20 Int) (|v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_163| Int)) (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_162| (store (select |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_162|) 0 v_DerPreprocessor_20)))) (or (< 0 (select (select (store .cse0 |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_163| (store (select .cse0 |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_163|) 0 v_DerPreprocessor_22)) |c_ULTIMATE.start_aws_priority_queue_clean_up_harness_~#queue~0#1.base|) (+ |c_ULTIMATE.start_aws_priority_queue_clean_up_harness_~#queue~0#1.offset| 8))) (and (= (select (select .cse0 |c_ULTIMATE.start_aws_priority_queue_clean_up_harness_~#queue~0#1.base|) (+ 40 |c_ULTIMATE.start_aws_priority_queue_clean_up_harness_~#queue~0#1.offset|)) 0) (forall ((v_DerPreprocessor_21 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_162| (store (select |c_#memory_$Pointer$.offset| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_162|) 0 v_DerPreprocessor_21)) |c_ULTIMATE.start_aws_priority_queue_clean_up_harness_~#queue~0#1.base|) (+ 40 |c_ULTIMATE.start_aws_priority_queue_clean_up_harness_~#queue~0#1.offset|)) 0)))))) is different from false [2021-11-16 21:51:31,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:51:31,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397004261] [2021-11-16 21:51:31,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:51:31,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303636282] [2021-11-16 21:51:31,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303636282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:51:31,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:51:31,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2021-11-16 21:51:31,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144392785] [2021-11-16 21:51:31,527 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-16 21:51:31,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-16 21:51:31,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:51:31,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-16 21:51:31,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2281, Unknown=107, NotChecked=510, Total=3080 [2021-11-16 21:51:31,529 INFO L87 Difference]: Start difference. First operand 397 states and 524 transitions. Second operand has 47 states, 42 states have (on average 3.0238095238095237) internal successors, (127), 38 states have internal predecessors, (127), 16 states have call successors, (28), 7 states have call predecessors, (28), 13 states have return successors, (27), 14 states have call predecessors, (27), 16 states have call successors, (27) [2021-11-16 21:51:33,524 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:51:37,464 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] Killed by 15