./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_array_list_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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_array_list_back_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 43b2ef256b4d1a93a084f86d3d9a0522c1b29c695f7bf9f8438f4c917cc80da0 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:27:16,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:27:16,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:27:16,309 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:27:16,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:27:16,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:27:16,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:27:16,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:27:16,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:27:16,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:27:16,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:27:16,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:27:16,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:27:16,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:27:16,319 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:27:16,320 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:27:16,321 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:27:16,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:27:16,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:27:16,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:27:16,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:27:16,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:27:16,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:27:16,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:27:16,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:27:16,348 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:27:16,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:27:16,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:27:16,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:27:16,351 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:27:16,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:27:16,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:27:16,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:27:16,354 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:27:16,355 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:27:16,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:27:16,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:27:16,357 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:27:16,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:27:16,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:27:16,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:27:16,359 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 15:27:16,385 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:27:16,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:27:16,386 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:27:16,386 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:27:16,387 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:27:16,387 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:27:16,388 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:27:16,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:27:16,388 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:27:16,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:27:16,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:27:16,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:27:16,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:27:16,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:27:16,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:27:16,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:27:16,390 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:27:16,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:27:16,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:27:16,391 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:27:16,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:27:16,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:27:16,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:27:16,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:27:16,392 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:27:16,392 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:27:16,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:27:16,392 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:27:16,392 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:27:16,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:27:16,393 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:27:16,393 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43b2ef256b4d1a93a084f86d3d9a0522c1b29c695f7bf9f8438f4c917cc80da0 [2021-12-21 15:27:16,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:27:16,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:27:16,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:27:16,682 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:27:16,682 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:27:16,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_array_list_back_harness.i [2021-12-21 15:27:16,738 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c8e01c78/2033e0afeca3417689953533c882c6ef/FLAG2b552cdf5 [2021-12-21 15:27:17,331 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:27:17,332 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_back_harness.i [2021-12-21 15:27:17,361 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c8e01c78/2033e0afeca3417689953533c882c6ef/FLAG2b552cdf5 [2021-12-21 15:27:17,516 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c8e01c78/2033e0afeca3417689953533c882c6ef [2021-12-21 15:27:17,518 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:27:17,520 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:27:17,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:27:17,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:27:17,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:27:17,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:27:17" (1/1) ... [2021-12-21 15:27:17,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54dd3083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:17, skipping insertion in model container [2021-12-21 15:27:17,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:27:17" (1/1) ... [2021-12-21 15:27:17,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:27:17,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:27:17,817 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_array_list_back_harness.i[4493,4506] [2021-12-21 15:27:17,823 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_array_list_back_harness.i[4553,4566] [2021-12-21 15:27:18,276 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-21 15:27:18,339 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,340 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,340 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,341 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,342 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,351 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,351 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,352 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,353 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,354 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,355 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,355 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,356 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,563 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-21 15:27:18,565 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-21 15:27:18,565 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-21 15:27:18,569 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-21 15:27:18,571 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-21 15:27:18,572 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-21 15:27:18,575 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-21 15:27:18,577 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-21 15:27:18,578 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-21 15:27:18,579 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-21 15:27:18,703 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,707 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,752 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:27:18,780 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:27:18,791 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_array_list_back_harness.i[4493,4506] [2021-12-21 15:27:18,791 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_array_list_back_harness.i[4553,4566] [2021-12-21 15:27:18,813 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-21 15:27:18,824 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,825 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,825 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,860 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,860 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,865 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,866 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,866 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,867 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,876 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,876 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,878 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,878 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,935 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-21 15:27:18,937 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-21 15:27:18,937 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-21 15:27:18,938 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-21 15:27:18,938 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-21 15:27:18,939 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-21 15:27:18,939 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-21 15:27:18,939 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-21 15:27:18,940 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-21 15:27:18,940 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-21 15:27:18,974 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:18,977 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:19,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:27:19,181 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:27:19,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:19 WrapperNode [2021-12-21 15:27:19,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:27:19,182 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:27:19,182 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:27:19,182 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:27:19,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:19" (1/1) ... [2021-12-21 15:27:19,271 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:19" (1/1) ... [2021-12-21 15:27:19,331 INFO L137 Inliner]: procedures = 691, calls = 1682, calls flagged for inlining = 53, calls inlined = 9, statements flattened = 656 [2021-12-21 15:27:19,341 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:27:19,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:27:19,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:27:19,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:27:19,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:19" (1/1) ... [2021-12-21 15:27:19,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:19" (1/1) ... [2021-12-21 15:27:19,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:19" (1/1) ... [2021-12-21 15:27:19,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:19" (1/1) ... [2021-12-21 15:27:19,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:19" (1/1) ... [2021-12-21 15:27:19,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:19" (1/1) ... [2021-12-21 15:27:19,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:19" (1/1) ... [2021-12-21 15:27:19,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:27:19,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:27:19,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:27:19,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:27:19,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:19" (1/1) ... [2021-12-21 15:27:19,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:27:19,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:27:19,468 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) [2021-12-21 15:27:19,481 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 [2021-12-21 15:27:19,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:27:19,509 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-12-21 15:27:19,510 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-12-21 15:27:19,510 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-12-21 15:27:19,511 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-12-21 15:27:19,511 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-21 15:27:19,512 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-21 15:27:19,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:27:19,512 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-21 15:27:19,512 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-21 15:27:19,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-21 15:27:19,513 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-21 15:27:19,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 15:27:19,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:27:19,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 15:27:19,513 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-12-21 15:27:19,514 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-12-21 15:27:19,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:27:19,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:27:19,514 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-21 15:27:19,515 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-21 15:27:19,515 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-21 15:27:19,515 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-21 15:27:19,516 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-12-21 15:27:19,516 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-12-21 15:27:19,516 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-12-21 15:27:19,516 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-12-21 15:27:19,516 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2021-12-21 15:27:19,516 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2021-12-21 15:27:19,517 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 15:27:19,517 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 15:27:19,517 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-12-21 15:27:19,517 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-12-21 15:27:19,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:27:19,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 15:27:19,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 15:27:19,518 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-21 15:27:19,518 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-21 15:27:19,518 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-12-21 15:27:19,518 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-12-21 15:27:19,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:27:19,519 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2021-12-21 15:27:19,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2021-12-21 15:27:19,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:27:19,793 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:27:19,795 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:27:20,458 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:27:20,468 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:27:20,469 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 15:27:20,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:27:20 BoogieIcfgContainer [2021-12-21 15:27:20,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:27:20,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:27:20,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:27:20,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:27:20,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:27:17" (1/3) ... [2021-12-21 15:27:20,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f241e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:27:20, skipping insertion in model container [2021-12-21 15:27:20,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:19" (2/3) ... [2021-12-21 15:27:20,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f241e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:27:20, skipping insertion in model container [2021-12-21 15:27:20,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:27:20" (3/3) ... [2021-12-21 15:27:20,479 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_list_back_harness.i [2021-12-21 15:27:20,487 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:27:20,487 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:27:20,531 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:27:20,544 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 [2021-12-21 15:27:20,545 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 15:27:20,563 INFO L276 IsEmpty]: Start isEmpty. Operand has 180 states, 109 states have (on average 1.2110091743119267) internal successors, (132), 110 states have internal predecessors, (132), 53 states have call successors, (53), 16 states have call predecessors, (53), 16 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2021-12-21 15:27:20,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-21 15:27:20,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:27:20,579 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:27:20,580 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:27:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:27:20,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1489749117, now seen corresponding path program 1 times [2021-12-21 15:27:20,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:27:20,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881097190] [2021-12-21 15:27:20,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:27:20,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:27:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:21,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:27:21,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:21,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 15:27:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:21,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 15:27:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:21,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:27:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:21,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:27:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:21,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 15:27:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:21,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 15:27:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:21,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 15:27:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:21,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 15:27:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:21,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:27:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:21,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 15:27:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:21,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 15:27:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:21,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 15:27:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:21,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 15:27:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:21,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 15:27:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:21,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-21 15:27:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:21,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 15:27:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:21,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-21 15:27:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:21,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-21 15:27:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:21,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-21 15:27:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-12-21 15:27:21,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:27:21,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881097190] [2021-12-21 15:27:21,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881097190] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:27:21,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:27:21,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:27:21,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530273662] [2021-12-21 15:27:21,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:27:21,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:27:21,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:27:21,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:27:21,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:27:21,406 INFO L87 Difference]: Start difference. First operand has 180 states, 109 states have (on average 1.2110091743119267) internal successors, (132), 110 states have internal predecessors, (132), 53 states have call successors, (53), 16 states have call predecessors, (53), 16 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-21 15:27:21,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:27:21,759 INFO L93 Difference]: Finished difference Result 374 states and 541 transitions. [2021-12-21 15:27:21,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:27:21,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 124 [2021-12-21 15:27:21,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:27:21,770 INFO L225 Difference]: With dead ends: 374 [2021-12-21 15:27:21,770 INFO L226 Difference]: Without dead ends: 192 [2021-12-21 15:27:21,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:27:21,777 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 114 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 15:27:21,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 285 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 15:27:21,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-21 15:27:21,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 171. [2021-12-21 15:27:21,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 102 states have (on average 1.1666666666666667) internal successors, (119), 103 states have internal predecessors, (119), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2021-12-21 15:27:21,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 223 transitions. [2021-12-21 15:27:21,825 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 223 transitions. Word has length 124 [2021-12-21 15:27:21,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:27:21,826 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 223 transitions. [2021-12-21 15:27:21,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-21 15:27:21,826 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 223 transitions. [2021-12-21 15:27:21,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-21 15:27:21,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:27:21,830 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:27:21,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:27:21,830 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:27:21,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:27:21,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1640985525, now seen corresponding path program 1 times [2021-12-21 15:27:21,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:27:21,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80111057] [2021-12-21 15:27:21,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:27:21,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:27:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:21,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:27:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:22,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 15:27:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:22,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 15:27:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:22,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:27:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:22,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:27:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:22,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 15:27:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:22,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 15:27:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:22,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 15:27:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:22,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 15:27:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:22,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:27:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:22,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 15:27:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:22,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 15:27:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:22,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 15:27:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:22,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 15:27:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:22,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 15:27:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:22,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-21 15:27:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:22,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 15:27:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:22,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-21 15:27:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:22,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-21 15:27:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:22,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-21 15:27:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-12-21 15:27:22,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:27:22,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80111057] [2021-12-21 15:27:22,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80111057] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:27:22,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903214835] [2021-12-21 15:27:22,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:27:22,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:27:22,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:27:22,244 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) [2021-12-21 15:27:22,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 15:27:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:22,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 2239 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 15:27:22,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:27:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-21 15:27:22,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:27:22,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903214835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:27:22,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:27:22,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-12-21 15:27:22,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348887765] [2021-12-21 15:27:22,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:27:22,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:27:22,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:27:22,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:27:22,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-21 15:27:22,953 INFO L87 Difference]: Start difference. First operand 171 states and 223 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-12-21 15:27:23,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:27:23,221 INFO L93 Difference]: Finished difference Result 315 states and 417 transitions. [2021-12-21 15:27:23,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 15:27:23,221 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 124 [2021-12-21 15:27:23,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:27:23,223 INFO L225 Difference]: With dead ends: 315 [2021-12-21 15:27:23,223 INFO L226 Difference]: Without dead ends: 173 [2021-12-21 15:27:23,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-12-21 15:27:23,225 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 232 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 15:27:23,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 634 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 15:27:23,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-21 15:27:23,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-12-21 15:27:23,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 103 states have (on average 1.1650485436893203) internal successors, (120), 105 states have internal predecessors, (120), 53 states have call successors, (53), 16 states have call predecessors, (53), 16 states have return successors, (56), 51 states have call predecessors, (56), 51 states have call successors, (56) [2021-12-21 15:27:23,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 229 transitions. [2021-12-21 15:27:23,243 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 229 transitions. Word has length 124 [2021-12-21 15:27:23,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:27:23,243 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 229 transitions. [2021-12-21 15:27:23,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-12-21 15:27:23,244 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 229 transitions. [2021-12-21 15:27:23,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-21 15:27:23,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:27:23,246 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 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] [2021-12-21 15:27:23,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 15:27:23,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:27:23,462 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:27:23,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:27:23,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1623021021, now seen corresponding path program 1 times [2021-12-21 15:27:23,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:27:23,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320284150] [2021-12-21 15:27:23,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:27:23,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:27:23,527 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 15:27:23,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631200280] [2021-12-21 15:27:23,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:27:23,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:27:23,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:27:23,529 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) [2021-12-21 15:27:23,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 15:27:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:24,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 2521 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 15:27:24,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:27:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-21 15:27:24,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:27:24,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:27:24,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320284150] [2021-12-21 15:27:24,306 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 15:27:24,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631200280] [2021-12-21 15:27:24,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631200280] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:27:24,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:27:24,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:27:24,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705330782] [2021-12-21 15:27:24,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:27:24,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:27:24,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:27:24,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:27:24,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:27:24,311 INFO L87 Difference]: Start difference. First operand 173 states and 229 transitions. Second operand has 7 states, 6 states have (on average 10.5) internal successors, (63), 7 states have internal predecessors, (63), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2021-12-21 15:27:24,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:27:24,564 INFO L93 Difference]: Finished difference Result 283 states and 374 transitions. [2021-12-21 15:27:24,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:27:24,565 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 7 states have internal predecessors, (63), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) Word has length 154 [2021-12-21 15:27:24,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:27:24,567 INFO L225 Difference]: With dead ends: 283 [2021-12-21 15:27:24,567 INFO L226 Difference]: Without dead ends: 173 [2021-12-21 15:27:24,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:27:24,568 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 249 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 15:27:24,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 776 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 15:27:24,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-21 15:27:24,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-12-21 15:27:24,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 103 states have (on average 1.1650485436893203) internal successors, (120), 105 states have internal predecessors, (120), 53 states have call successors, (53), 16 states have call predecessors, (53), 16 states have return successors, (53), 51 states have call predecessors, (53), 51 states have call successors, (53) [2021-12-21 15:27:24,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 226 transitions. [2021-12-21 15:27:24,586 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 226 transitions. Word has length 154 [2021-12-21 15:27:24,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:27:24,587 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 226 transitions. [2021-12-21 15:27:24,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 7 states have internal predecessors, (63), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2021-12-21 15:27:24,587 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 226 transitions. [2021-12-21 15:27:24,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-21 15:27:24,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:27:24,589 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:27:24,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 15:27:24,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-21 15:27:24,811 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:27:24,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:27:24,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2016135159, now seen corresponding path program 2 times [2021-12-21 15:27:24,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:27:24,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348259166] [2021-12-21 15:27:24,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:27:24,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:27:24,872 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 15:27:24,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954095591] [2021-12-21 15:27:24,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:27:24,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:27:24,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:27:24,874 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) [2021-12-21 15:27:24,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 15:27:25,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:27:25,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:27:25,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 2662 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-21 15:27:25,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:27:25,754 INFO L387 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 9 treesize of output 3 [2021-12-21 15:27:26,208 INFO L353 Elim1Store]: treesize reduction 120, result has 50.2 percent of original size [2021-12-21 15:27:26,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 31 select indices, 31 select index equivalence classes, 435 disjoint index pairs (out of 465 index pairs), introduced 31 new quantified variables, introduced 30 case distinctions, treesize of input 156 treesize of output 214