./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_array_list_set_at_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_array_list_set_at_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 156ab79a85c4b985ced0d661dede185c573e9f8e4fcba49b00d62d883c71bbed --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 20:15:19,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 20:15:19,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 20:15:19,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 20:15:19,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 20:15:19,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 20:15:19,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 20:15:19,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 20:15:19,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 20:15:19,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 20:15:19,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 20:15:19,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 20:15:19,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 20:15:19,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 20:15:19,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 20:15:19,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 20:15:19,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 20:15:19,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 20:15:19,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 20:15:19,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 20:15:19,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 20:15:19,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 20:15:19,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 20:15:19,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 20:15:19,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 20:15:19,454 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 20:15:19,454 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 20:15:19,455 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 20:15:19,455 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 20:15:19,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 20:15:19,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 20:15:19,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 20:15:19,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 20:15:19,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 20:15:19,458 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 20:15:19,458 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 20:15:19,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 20:15:19,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 20:15:19,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 20:15:19,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 20:15:19,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 20:15:19,461 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-16 20:15:19,476 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 20:15:19,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 20:15:19,477 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 20:15:19,477 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 20:15:19,477 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 20:15:19,477 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 20:15:19,478 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 20:15:19,478 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 20:15:19,478 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 20:15:19,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 20:15:19,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-16 20:15:19,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 20:15:19,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 20:15:19,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 20:15:19,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 20:15:19,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 20:15:19,479 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 20:15:19,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 20:15:19,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 20:15:19,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 20:15:19,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 20:15:19,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 20:15:19,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 20:15:19,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 20:15:19,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 20:15:19,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-16 20:15:19,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-16 20:15:19,481 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 20:15:19,481 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 20:15:19,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 20:15:19,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 20:15:19,482 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 156ab79a85c4b985ced0d661dede185c573e9f8e4fcba49b00d62d883c71bbed [2021-11-16 20:15:19,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 20:15:19,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 20:15:19,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 20:15:19,647 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 20:15:19,647 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 20:15:19,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_array_list_set_at_harness.i [2021-11-16 20:15:19,685 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a21e6185f/b442c368510d4dd18eca96b5f7b2f575/FLAG288877990 [2021-11-16 20:15:20,288 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 20:15:20,289 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_set_at_harness.i [2021-11-16 20:15:20,317 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a21e6185f/b442c368510d4dd18eca96b5f7b2f575/FLAG288877990 [2021-11-16 20:15:20,672 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a21e6185f/b442c368510d4dd18eca96b5f7b2f575 [2021-11-16 20:15:20,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 20:15:20,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 20:15:20,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 20:15:20,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 20:15:20,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 20:15:20,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:15:20" (1/1) ... [2021-11-16 20:15:20,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6da84092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:15:20, skipping insertion in model container [2021-11-16 20:15:20,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:15:20" (1/1) ... [2021-11-16 20:15:20,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 20:15:20,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 20:15:20,947 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_set_at_harness.i[4495,4508] [2021-11-16 20:15:20,952 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_set_at_harness.i[4555,4568] [2021-11-16 20:15:20,962 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 20:15:20,967 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 20:15:21,421 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 20:15:21,469 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,469 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,470 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,470 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,471 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,478 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,478 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,479 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,479 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,480 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,481 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,481 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,482 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,641 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 20:15:21,642 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 20:15:21,642 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 20:15:21,643 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 20:15:21,644 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 20:15:21,644 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 20:15:21,645 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 20:15:21,645 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 20:15:21,646 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 20:15:21,646 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 20:15:21,718 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,722 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,764 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,764 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,765 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,766 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 20:15:21,782 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 20:15:21,790 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_set_at_harness.i[4495,4508] [2021-11-16 20:15:21,790 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_set_at_harness.i[4555,4568] [2021-11-16 20:15:21,792 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 20:15:21,792 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 20:15:21,808 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 20:15:21,817 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,818 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,818 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,818 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,819 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,822 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,823 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,823 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,824 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,824 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,825 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,825 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,825 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,845 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 20:15:21,853 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 20:15:21,853 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 20:15:21,854 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 20:15:21,854 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 20:15:21,855 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 20:15:21,855 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 20:15:21,855 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 20:15:21,856 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 20:15:21,856 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 20:15:21,872 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,875 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,887 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,888 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,888 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:15:21,889 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 20:15:22,111 INFO L208 MainTranslator]: Completed translation [2021-11-16 20:15:22,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:15:22 WrapperNode [2021-11-16 20:15:22,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 20:15:22,112 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 20:15:22,112 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 20:15:22,113 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 20:15:22,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:15:22" (1/1) ... [2021-11-16 20:15:22,171 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:15:22" (1/1) ... [2021-11-16 20:15:22,225 INFO L137 Inliner]: procedures = 693, calls = 1683, calls flagged for inlining = 51, calls inlined = 11, statements flattened = 844 [2021-11-16 20:15:22,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 20:15:22,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 20:15:22,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 20:15:22,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 20:15:22,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:15:22" (1/1) ... [2021-11-16 20:15:22,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:15:22" (1/1) ... [2021-11-16 20:15:22,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:15:22" (1/1) ... [2021-11-16 20:15:22,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:15:22" (1/1) ... [2021-11-16 20:15:22,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:15:22" (1/1) ... [2021-11-16 20:15:22,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:15:22" (1/1) ... [2021-11-16 20:15:22,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:15:22" (1/1) ... [2021-11-16 20:15:22,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 20:15:22,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 20:15:22,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 20:15:22,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 20:15:22,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:15:22" (1/1) ... [2021-11-16 20:15:22,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 20:15:22,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:15:22,390 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-16 20:15:22,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-16 20:15:22,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 20:15:22,421 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-11-16 20:15:22,421 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-11-16 20:15:22,421 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-11-16 20:15:22,421 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-11-16 20:15:22,422 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-16 20:15:22,422 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-16 20:15:22,422 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2021-11-16 20:15:22,422 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2021-11-16 20:15:22,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-16 20:15:22,423 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-16 20:15:22,423 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-16 20:15:22,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-16 20:15:22,423 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-16 20:15:22,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-16 20:15:22,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 20:15:22,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-16 20:15:22,424 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-11-16 20:15:22,424 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-11-16 20:15:22,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 20:15:22,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 20:15:22,425 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-16 20:15:22,425 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-16 20:15:22,425 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-16 20:15:22,425 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-16 20:15:22,425 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-16 20:15:22,425 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-16 20:15:22,426 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_uaddl_overflow [2021-11-16 20:15:22,426 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-11-16 20:15:22,426 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-11-16 20:15:22,426 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-11-16 20:15:22,426 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-11-16 20:15:22,426 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2021-11-16 20:15:22,426 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2021-11-16 20:15:22,426 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-16 20:15:22,427 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-16 20:15:22,427 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-11-16 20:15:22,427 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-11-16 20:15:22,427 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2021-11-16 20:15:22,427 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2021-11-16 20:15:22,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 20:15:22,427 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-11-16 20:15:22,428 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-11-16 20:15:22,428 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_umull_overflow [2021-11-16 20:15:22,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-16 20:15:22,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 20:15:22,428 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-16 20:15:22,428 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-16 20:15:22,429 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-16 20:15:22,429 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-16 20:15:22,429 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-11-16 20:15:22,429 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-11-16 20:15:22,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-16 20:15:22,430 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2021-11-16 20:15:22,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2021-11-16 20:15:22,432 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_set_at [2021-11-16 20:15:22,433 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_set_at [2021-11-16 20:15:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-16 20:15:22,708 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 20:15:22,709 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 20:15:23,438 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 20:15:23,444 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 20:15:23,444 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-16 20:15:23,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:15:23 BoogieIcfgContainer [2021-11-16 20:15:23,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 20:15:23,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 20:15:23,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 20:15:23,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 20:15:23,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:15:20" (1/3) ... [2021-11-16 20:15:23,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a0cd0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:15:23, skipping insertion in model container [2021-11-16 20:15:23,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:15:22" (2/3) ... [2021-11-16 20:15:23,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a0cd0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:15:23, skipping insertion in model container [2021-11-16 20:15:23,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:15:23" (3/3) ... [2021-11-16 20:15:23,452 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_list_set_at_harness.i [2021-11-16 20:15:23,456 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 20:15:23,456 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 20:15:23,486 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 20:15:23,490 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-16 20:15:23,490 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 20:15:23,512 INFO L276 IsEmpty]: Start isEmpty. Operand has 281 states, 164 states have (on average 1.2195121951219512) internal successors, (200), 165 states have internal predecessors, (200), 93 states have call successors, (93), 22 states have call predecessors, (93), 22 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-16 20:15:23,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-16 20:15:23,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:15:23,524 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:15:23,524 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:15:23,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:15:23,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1870768140, now seen corresponding path program 1 times [2021-11-16 20:15:23,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:15:23,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299147248] [2021-11-16 20:15:23,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:23,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:15:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:23,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:15:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:23,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:15:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:23,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 20:15:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:15:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:15:24,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 20:15:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 20:15:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:15:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:15:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:15:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:15:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 20:15:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-16 20:15:24,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-16 20:15:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-16 20:15:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-16 20:15:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-16 20:15:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-16 20:15:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-16 20:15:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-16 20:15:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-16 20:15:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-11-16 20:15:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:15:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-11-16 20:15:24,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-16 20:15:24,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:15:24,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299147248] [2021-11-16 20:15:24,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299147248] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:15:24,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696305638] [2021-11-16 20:15:24,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:24,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:15:24,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:15:24,335 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:15:24,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-16 20:15:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:24,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 2383 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-16 20:15:24,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:15:25,125 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-11-16 20:15:25,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:15:25,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696305638] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:15:25,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:15:25,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-11-16 20:15:25,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991900365] [2021-11-16 20:15:25,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:15:25,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 20:15:25,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:15:25,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 20:15:25,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-16 20:15:25,150 INFO L87 Difference]: Start difference. First operand has 281 states, 164 states have (on average 1.2195121951219512) internal successors, (200), 165 states have internal predecessors, (200), 93 states have call successors, (93), 22 states have call predecessors, (93), 22 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-16 20:15:25,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:15:25,442 INFO L93 Difference]: Finished difference Result 557 states and 840 transitions. [2021-11-16 20:15:25,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 20:15:25,445 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 146 [2021-11-16 20:15:25,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:15:25,455 INFO L225 Difference]: With dead ends: 557 [2021-11-16 20:15:25,455 INFO L226 Difference]: Without dead ends: 278 [2021-11-16 20:15:25,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-16 20:15:25,463 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 385 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:15:25,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 1229 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 20:15:25,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-16 20:15:25,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2021-11-16 20:15:25,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 161 states have (on average 1.2111801242236024) internal successors, (195), 163 states have internal predecessors, (195), 93 states have call successors, (93), 22 states have call predecessors, (93), 23 states have return successors, (108), 92 states have call predecessors, (108), 92 states have call successors, (108) [2021-11-16 20:15:25,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 396 transitions. [2021-11-16 20:15:25,514 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 396 transitions. Word has length 146 [2021-11-16 20:15:25,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:15:25,515 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 396 transitions. [2021-11-16 20:15:25,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-16 20:15:25,515 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 396 transitions. [2021-11-16 20:15:25,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-16 20:15:25,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:15:25,519 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 4, 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] [2021-11-16 20:15:25,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-16 20:15:25,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-16 20:15:25,738 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:15:25,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:15:25,738 INFO L85 PathProgramCache]: Analyzing trace with hash 265363754, now seen corresponding path program 1 times [2021-11-16 20:15:25,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:15:25,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594882477] [2021-11-16 20:15:25,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:25,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:15:25,777 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:15:25,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092902641] [2021-11-16 20:15:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:25,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:15:25,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:15:25,792 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:15:25,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-16 20:15:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:26,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 2615 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 20:15:26,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:15:26,458 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-11-16 20:15:26,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:15:26,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:15:26,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594882477] [2021-11-16 20:15:26,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 20:15:26,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092902641] [2021-11-16 20:15:26,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092902641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:15:26,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:15:26,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 20:15:26,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71626887] [2021-11-16 20:15:26,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:15:26,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 20:15:26,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:15:26,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 20:15:26,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 20:15:26,462 INFO L87 Difference]: Start difference. First operand 278 states and 396 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-16 20:15:26,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:15:26,495 INFO L93 Difference]: Finished difference Result 535 states and 784 transitions. [2021-11-16 20:15:26,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:15:26,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 176 [2021-11-16 20:15:26,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:15:26,499 INFO L225 Difference]: With dead ends: 535 [2021-11-16 20:15:26,499 INFO L226 Difference]: Without dead ends: 283 [2021-11-16 20:15:26,500 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 20:15:26,501 INFO L933 BasicCegarLoop]: 378 mSDtfsCounter, 10 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:15:26,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1124 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:15:26,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-16 20:15:26,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 280. [2021-11-16 20:15:26,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 163 states have (on average 1.2085889570552146) internal successors, (197), 165 states have internal predecessors, (197), 93 states have call successors, (93), 22 states have call predecessors, (93), 23 states have return successors, (108), 92 states have call predecessors, (108), 92 states have call successors, (108) [2021-11-16 20:15:26,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 398 transitions. [2021-11-16 20:15:26,524 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 398 transitions. Word has length 176 [2021-11-16 20:15:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:15:26,526 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 398 transitions. [2021-11-16 20:15:26,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-16 20:15:26,526 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 398 transitions. [2021-11-16 20:15:26,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-16 20:15:26,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:15:26,533 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 4, 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] [2021-11-16 20:15:26,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-16 20:15:26,750 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,SelfDestructingSolverStorable1 [2021-11-16 20:15:26,751 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:15:26,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:15:26,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1664860694, now seen corresponding path program 1 times [2021-11-16 20:15:26,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:15:26,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938322468] [2021-11-16 20:15:26,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:26,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:15:26,784 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:15:26,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102922217] [2021-11-16 20:15:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:26,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:15:26,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:15:26,800 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:15:26,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-16 20:15:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:27,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 2625 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-16 20:15:27,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:15:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-11-16 20:15:27,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:15:27,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:15:27,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938322468] [2021-11-16 20:15:27,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 20:15:27,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102922217] [2021-11-16 20:15:27,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102922217] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:15:27,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:15:27,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 20:15:27,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646715380] [2021-11-16 20:15:27,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:15:27,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 20:15:27,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:15:27,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 20:15:27,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:15:27,526 INFO L87 Difference]: Start difference. First operand 280 states and 398 transitions. Second operand has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-16 20:15:27,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:15:27,948 INFO L93 Difference]: Finished difference Result 512 states and 726 transitions. [2021-11-16 20:15:27,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 20:15:27,948 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) Word has length 176 [2021-11-16 20:15:27,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:15:27,951 INFO L225 Difference]: With dead ends: 512 [2021-11-16 20:15:27,951 INFO L226 Difference]: Without dead ends: 280 [2021-11-16 20:15:27,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:15:27,953 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 444 mSDsluCounter, 1283 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1574 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:15:27,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 1574 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-16 20:15:27,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-16 20:15:27,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2021-11-16 20:15:27,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 163 states have (on average 1.2085889570552146) internal successors, (197), 165 states have internal predecessors, (197), 93 states have call successors, (93), 22 states have call predecessors, (93), 23 states have return successors, (104), 92 states have call predecessors, (104), 92 states have call successors, (104) [2021-11-16 20:15:27,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 394 transitions. [2021-11-16 20:15:27,970 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 394 transitions. Word has length 176 [2021-11-16 20:15:27,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:15:27,971 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 394 transitions. [2021-11-16 20:15:27,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-16 20:15:27,971 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 394 transitions. [2021-11-16 20:15:27,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-16 20:15:27,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:15:27,973 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:15:28,010 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 20:15:28,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:15:28,192 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:15:28,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:15:28,193 INFO L85 PathProgramCache]: Analyzing trace with hash -331838195, now seen corresponding path program 2 times [2021-11-16 20:15:28,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:15:28,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392260648] [2021-11-16 20:15:28,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:28,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:15:28,239 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:15:28,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226534294] [2021-11-16 20:15:28,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 20:15:28,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:15:28,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:15:28,240 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:15:28,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-16 20:15:28,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-16 20:15:28,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 20:15:28,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 1892 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-16 20:15:28,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:15:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-11-16 20:15:28,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:15:28,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:15:28,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392260648] [2021-11-16 20:15:28,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 20:15:28,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226534294] [2021-11-16 20:15:28,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226534294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:15:28,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:15:28,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-16 20:15:28,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655259578] [2021-11-16 20:15:28,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:15:28,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 20:15:28,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:15:28,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 20:15:28,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-16 20:15:28,789 INFO L87 Difference]: Start difference. First operand 280 states and 394 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-16 20:15:28,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:15:28,811 INFO L93 Difference]: Finished difference Result 494 states and 684 transitions. [2021-11-16 20:15:28,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:15:28,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) Word has length 191 [2021-11-16 20:15:28,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:15:28,813 INFO L225 Difference]: With dead ends: 494 [2021-11-16 20:15:28,813 INFO L226 Difference]: Without dead ends: 285 [2021-11-16 20:15:28,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-16 20:15:28,815 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 2 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1499 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:15:28,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1499 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:15:28,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-16 20:15:28,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2021-11-16 20:15:28,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 167 states have (on average 1.2035928143712575) internal successors, (201), 169 states have internal predecessors, (201), 93 states have call successors, (93), 22 states have call predecessors, (93), 24 states have return successors, (106), 93 states have call predecessors, (106), 92 states have call successors, (106) [2021-11-16 20:15:28,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 400 transitions. [2021-11-16 20:15:28,827 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 400 transitions. Word has length 191 [2021-11-16 20:15:28,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:15:28,828 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 400 transitions. [2021-11-16 20:15:28,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-16 20:15:28,828 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 400 transitions. [2021-11-16 20:15:28,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-16 20:15:28,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:15:28,830 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:15:28,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-16 20:15:29,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:15:29,049 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:15:29,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:15:29,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1595114899, now seen corresponding path program 1 times [2021-11-16 20:15:29,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:15:29,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408258048] [2021-11-16 20:15:29,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:29,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:15:29,077 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:15:29,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926476493] [2021-11-16 20:15:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:29,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:15:29,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:15:29,078 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:15:29,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-16 20:15:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:29,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 2762 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-16 20:15:29,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:15:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-16 20:15:29,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:15:29,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:15:29,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408258048] [2021-11-16 20:15:29,782 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 20:15:29,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926476493] [2021-11-16 20:15:29,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926476493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:15:29,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:15:29,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-16 20:15:29,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085360816] [2021-11-16 20:15:29,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:15:29,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:15:29,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:15:29,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:15:29,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-16 20:15:29,784 INFO L87 Difference]: Start difference. First operand 285 states and 400 transitions. Second operand has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 5 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (27), 4 states have call predecessors, (27), 5 states have call successors, (27) [2021-11-16 20:15:30,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:15:30,229 INFO L93 Difference]: Finished difference Result 516 states and 720 transitions. [2021-11-16 20:15:30,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 20:15:30,230 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 5 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (27), 4 states have call predecessors, (27), 5 states have call successors, (27) Word has length 197 [2021-11-16 20:15:30,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:15:30,232 INFO L225 Difference]: With dead ends: 516 [2021-11-16 20:15:30,232 INFO L226 Difference]: Without dead ends: 285 [2021-11-16 20:15:30,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 191 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 20:15:30,233 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 494 mSDsluCounter, 1499 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 1781 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:15:30,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 1781 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-16 20:15:30,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-16 20:15:30,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2021-11-16 20:15:30,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 167 states have (on average 1.2035928143712575) internal successors, (201), 169 states have internal predecessors, (201), 93 states have call successors, (93), 22 states have call predecessors, (93), 24 states have return successors, (100), 93 states have call predecessors, (100), 92 states have call successors, (100) [2021-11-16 20:15:30,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 394 transitions. [2021-11-16 20:15:30,244 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 394 transitions. Word has length 197 [2021-11-16 20:15:30,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:15:30,245 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 394 transitions. [2021-11-16 20:15:30,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 5 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (27), 4 states have call predecessors, (27), 5 states have call successors, (27) [2021-11-16 20:15:30,245 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 394 transitions. [2021-11-16 20:15:30,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-16 20:15:30,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:15:30,246 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-16 20:15:30,269 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 20:15:30,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:15:30,466 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:15:30,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:15:30,467 INFO L85 PathProgramCache]: Analyzing trace with hash -895724094, now seen corresponding path program 2 times [2021-11-16 20:15:30,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:15:30,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922076669] [2021-11-16 20:15:30,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:30,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:15:30,495 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:15:30,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166033659] [2021-11-16 20:15:30,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 20:15:30,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:15:30,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:15:30,497 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:15:30,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-16 20:15:32,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 20:15:32,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 20:15:32,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 2883 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-16 20:15:32,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:15:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2021-11-16 20:15:32,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:15:32,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:15:32,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922076669] [2021-11-16 20:15:32,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 20:15:32,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166033659] [2021-11-16 20:15:32,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166033659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:15:32,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:15:32,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-16 20:15:32,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351185323] [2021-11-16 20:15:32,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:15:32,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 20:15:32,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:15:32,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 20:15:32,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:15:32,905 INFO L87 Difference]: Start difference. First operand 285 states and 394 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) [2021-11-16 20:15:33,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:15:33,374 INFO L93 Difference]: Finished difference Result 513 states and 703 transitions. [2021-11-16 20:15:33,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 20:15:33,375 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) Word has length 212 [2021-11-16 20:15:33,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:15:33,377 INFO L225 Difference]: With dead ends: 513 [2021-11-16 20:15:33,377 INFO L226 Difference]: Without dead ends: 285 [2021-11-16 20:15:33,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-11-16 20:15:33,378 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 542 mSDsluCounter, 1739 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 2020 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:15:33,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 2020 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-16 20:15:33,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-16 20:15:33,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2021-11-16 20:15:33,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 167 states have (on average 1.2035928143712575) internal successors, (201), 169 states have internal predecessors, (201), 93 states have call successors, (93), 22 states have call predecessors, (93), 24 states have return successors, (96), 93 states have call predecessors, (96), 92 states have call successors, (96) [2021-11-16 20:15:33,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 390 transitions. [2021-11-16 20:15:33,390 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 390 transitions. Word has length 212 [2021-11-16 20:15:33,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:15:33,391 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 390 transitions. [2021-11-16 20:15:33,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) [2021-11-16 20:15:33,391 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 390 transitions. [2021-11-16 20:15:33,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-16 20:15:33,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:15:33,394 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:15:33,416 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 20:15:33,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:15:33,616 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:15:33,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:15:33,617 INFO L85 PathProgramCache]: Analyzing trace with hash 247081526, now seen corresponding path program 1 times [2021-11-16 20:15:33,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:15:33,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435155636] [2021-11-16 20:15:33,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:33,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:15:33,667 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:15:33,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598455536] [2021-11-16 20:15:33,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:33,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:15:33,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:15:33,668 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:15:33,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-16 20:15:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:34,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 3125 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-16 20:15:34,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:15:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-11-16 20:15:34,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:15:34,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:15:34,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435155636] [2021-11-16 20:15:34,588 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 20:15:34,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598455536] [2021-11-16 20:15:34,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598455536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:15:34,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:15:34,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-16 20:15:34,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930716880] [2021-11-16 20:15:34,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:15:34,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:15:34,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:15:34,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:15:34,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-16 20:15:34,590 INFO L87 Difference]: Start difference. First operand 285 states and 390 transitions. Second operand has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 5 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-16 20:15:34,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:15:34,748 INFO L93 Difference]: Finished difference Result 646 states and 908 transitions. [2021-11-16 20:15:34,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 20:15:34,748 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 5 states have call predecessors, (29), 4 states have call successors, (29) Word has length 242 [2021-11-16 20:15:34,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:15:34,751 INFO L225 Difference]: With dead ends: 646 [2021-11-16 20:15:34,751 INFO L226 Difference]: Without dead ends: 412 [2021-11-16 20:15:34,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:15:34,753 INFO L933 BasicCegarLoop]: 431 mSDtfsCounter, 133 mSDsluCounter, 2908 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 3339 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:15:34,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 3339 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:15:34,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-16 20:15:34,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 388. [2021-11-16 20:15:34,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 223 states have (on average 1.2152466367713004) internal successors, (271), 225 states have internal predecessors, (271), 138 states have call successors, (138), 23 states have call predecessors, (138), 26 states have return successors, (145), 139 states have call predecessors, (145), 137 states have call successors, (145) [2021-11-16 20:15:34,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 554 transitions. [2021-11-16 20:15:34,771 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 554 transitions. Word has length 242 [2021-11-16 20:15:34,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:15:34,772 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 554 transitions. [2021-11-16 20:15:34,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 5 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-16 20:15:34,772 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 554 transitions. [2021-11-16 20:15:34,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-16 20:15:34,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:15:34,774 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:15:34,811 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 20:15:34,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:15:34,995 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:15:34,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:15:34,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1060060872, now seen corresponding path program 1 times [2021-11-16 20:15:34,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:15:34,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189815573] [2021-11-16 20:15:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:34,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:15:35,039 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:15:35,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215649658] [2021-11-16 20:15:35,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:35,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:15:35,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:15:35,040 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:15:35,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-16 20:15:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:35,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 3122 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-16 20:15:35,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:15:35,945 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-11-16 20:15:35,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:15:35,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:15:35,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189815573] [2021-11-16 20:15:35,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 20:15:35,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215649658] [2021-11-16 20:15:35,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215649658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:15:35,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:15:35,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-16 20:15:35,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313186757] [2021-11-16 20:15:35,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:15:35,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 20:15:35,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:15:35,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 20:15:35,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:15:35,948 INFO L87 Difference]: Start difference. First operand 388 states and 554 transitions. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-16 20:15:36,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:15:36,142 INFO L93 Difference]: Finished difference Result 827 states and 1198 transitions. [2021-11-16 20:15:36,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 20:15:36,143 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) Word has length 242 [2021-11-16 20:15:36,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:15:36,147 INFO L225 Difference]: With dead ends: 827 [2021-11-16 20:15:36,148 INFO L226 Difference]: Without dead ends: 500 [2021-11-16 20:15:36,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:15:36,150 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 127 mSDsluCounter, 2456 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 2994 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:15:36,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 2994 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:15:36,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-11-16 20:15:36,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 478. [2021-11-16 20:15:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 270 states have (on average 1.2185185185185186) internal successors, (329), 272 states have internal predecessors, (329), 180 states have call successors, (180), 24 states have call predecessors, (180), 27 states have return successors, (189), 181 states have call predecessors, (189), 179 states have call successors, (189) [2021-11-16 20:15:36,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 698 transitions. [2021-11-16 20:15:36,175 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 698 transitions. Word has length 242 [2021-11-16 20:15:36,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:15:36,176 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 698 transitions. [2021-11-16 20:15:36,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-16 20:15:36,176 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 698 transitions. [2021-11-16 20:15:36,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-16 20:15:36,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:15:36,179 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:15:36,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-16 20:15:36,400 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,SelfDestructingSolverStorable7 [2021-11-16 20:15:36,401 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:15:36,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:15:36,401 INFO L85 PathProgramCache]: Analyzing trace with hash -642172170, now seen corresponding path program 1 times [2021-11-16 20:15:36,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:15:36,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071098973] [2021-11-16 20:15:36,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:36,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:15:36,470 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:15:36,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648928121] [2021-11-16 20:15:36,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:36,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:15:36,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:15:36,488 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:15:36,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-16 20:15:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:36,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 3119 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-16 20:15:36,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:15:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 282 proven. 1 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-16 20:15:37,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:15:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2021-11-16 20:15:37,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:15:37,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071098973] [2021-11-16 20:15:37,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 20:15:37,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648928121] [2021-11-16 20:15:37,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648928121] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:15:37,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:15:37,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-11-16 20:15:37,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317024963] [2021-11-16 20:15:37,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:15:37,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 20:15:37,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:15:37,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 20:15:37,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:15:37,987 INFO L87 Difference]: Start difference. First operand 478 states and 698 transitions. Second operand has 11 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 4 states have call successors, (43), 3 states have call predecessors, (43), 4 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-16 20:15:38,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:15:38,207 INFO L93 Difference]: Finished difference Result 634 states and 884 transitions. [2021-11-16 20:15:38,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 20:15:38,208 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 4 states have call successors, (43), 3 states have call predecessors, (43), 4 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 242 [2021-11-16 20:15:38,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:15:38,209 INFO L225 Difference]: With dead ends: 634 [2021-11-16 20:15:38,209 INFO L226 Difference]: Without dead ends: 289 [2021-11-16 20:15:38,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-16 20:15:38,212 INFO L933 BasicCegarLoop]: 353 mSDtfsCounter, 3 mSDsluCounter, 2385 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2738 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:15:38,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 2738 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 20:15:38,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-16 20:15:38,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 288. [2021-11-16 20:15:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 169 states have (on average 1.1893491124260356) internal successors, (201), 172 states have internal predecessors, (201), 93 states have call successors, (93), 22 states have call predecessors, (93), 25 states have return successors, (97), 93 states have call predecessors, (97), 92 states have call successors, (97) [2021-11-16 20:15:38,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 391 transitions. [2021-11-16 20:15:38,224 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 391 transitions. Word has length 242 [2021-11-16 20:15:38,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:15:38,224 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 391 transitions. [2021-11-16 20:15:38,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 4 states have call successors, (43), 3 states have call predecessors, (43), 4 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-16 20:15:38,224 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 391 transitions. [2021-11-16 20:15:38,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-16 20:15:38,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:15:38,226 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:15:38,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-16 20:15:38,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:15:38,443 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:15:38,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:15:38,444 INFO L85 PathProgramCache]: Analyzing trace with hash 2101338209, now seen corresponding path program 1 times [2021-11-16 20:15:38,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:15:38,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470793319] [2021-11-16 20:15:38,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:38,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:15:38,494 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:15:38,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562106886] [2021-11-16 20:15:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:38,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:15:38,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:15:38,505 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:15:38,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-16 20:15:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:38,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 3156 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-16 20:15:38,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:15:39,262 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 19 treesize of output 7 [2021-11-16 20:15:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 239 proven. 4 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-11-16 20:15:39,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:15:40,420 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-16 20:15:40,420 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 40 treesize of output 35 [2021-11-16 20:15:40,424 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-16 20:15:40,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-11-16 20:15:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 27 proven. 78 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2021-11-16 20:15:40,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:15:40,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470793319] [2021-11-16 20:15:40,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 20:15:40,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562106886] [2021-11-16 20:15:40,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562106886] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:15:40,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:15:40,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-11-16 20:15:40,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090167022] [2021-11-16 20:15:40,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:15:40,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-16 20:15:40,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:15:40,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-16 20:15:40,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-11-16 20:15:40,534 INFO L87 Difference]: Start difference. First operand 288 states and 391 transitions. Second operand has 24 states, 20 states have (on average 6.7) internal successors, (134), 19 states have internal predecessors, (134), 10 states have call successors, (60), 5 states have call predecessors, (60), 6 states have return successors, (57), 7 states have call predecessors, (57), 9 states have call successors, (57) [2021-11-16 20:15:41,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:15:41,992 INFO L93 Difference]: Finished difference Result 564 states and 777 transitions. [2021-11-16 20:15:41,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-16 20:15:41,992 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 6.7) internal successors, (134), 19 states have internal predecessors, (134), 10 states have call successors, (60), 5 states have call predecessors, (60), 6 states have return successors, (57), 7 states have call predecessors, (57), 9 states have call successors, (57) Word has length 253 [2021-11-16 20:15:41,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:15:41,994 INFO L225 Difference]: With dead ends: 564 [2021-11-16 20:15:41,994 INFO L226 Difference]: Without dead ends: 294 [2021-11-16 20:15:41,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 485 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-11-16 20:15:41,996 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 70 mSDsluCounter, 4146 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 4470 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:15:41,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 4470 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1056 Invalid, 0 Unknown, 120 Unchecked, 1.2s Time] [2021-11-16 20:15:41,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-11-16 20:15:42,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 291. [2021-11-16 20:15:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 171 states have (on average 1.1871345029239766) internal successors, (203), 175 states have internal predecessors, (203), 93 states have call successors, (93), 22 states have call predecessors, (93), 26 states have return successors, (115), 93 states have call predecessors, (115), 92 states have call successors, (115) [2021-11-16 20:15:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 411 transitions. [2021-11-16 20:15:42,005 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 411 transitions. Word has length 253 [2021-11-16 20:15:42,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:15:42,006 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 411 transitions. [2021-11-16 20:15:42,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 6.7) internal successors, (134), 19 states have internal predecessors, (134), 10 states have call successors, (60), 5 states have call predecessors, (60), 6 states have return successors, (57), 7 states have call predecessors, (57), 9 states have call successors, (57) [2021-11-16 20:15:42,006 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 411 transitions. [2021-11-16 20:15:42,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-16 20:15:42,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:15:42,007 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:15:42,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-16 20:15:42,227 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,SelfDestructingSolverStorable9 [2021-11-16 20:15:42,227 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:15:42,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:15:42,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1612948967, now seen corresponding path program 1 times [2021-11-16 20:15:42,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:15:42,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211769723] [2021-11-16 20:15:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:42,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:15:42,260 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:15:42,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858530102] [2021-11-16 20:15:42,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:42,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:15:42,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:15:42,288 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:15:42,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-16 20:15:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:42,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 3156 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-16 20:15:42,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:15:43,137 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2021-11-16 20:15:43,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:15:43,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:15:43,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211769723] [2021-11-16 20:15:43,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 20:15:43,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858530102] [2021-11-16 20:15:43,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858530102] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:15:43,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:15:43,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-16 20:15:43,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573328717] [2021-11-16 20:15:43,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:15:43,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 20:15:43,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:15:43,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 20:15:43,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-16 20:15:43,139 INFO L87 Difference]: Start difference. First operand 291 states and 411 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-16 20:15:43,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:15:43,775 INFO L93 Difference]: Finished difference Result 561 states and 831 transitions. [2021-11-16 20:15:43,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 20:15:43,776 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 255 [2021-11-16 20:15:43,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:15:43,777 INFO L225 Difference]: With dead ends: 561 [2021-11-16 20:15:43,777 INFO L226 Difference]: Without dead ends: 296 [2021-11-16 20:15:43,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:15:43,779 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 7 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-16 20:15:43,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1447 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-16 20:15:43,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-16 20:15:43,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 292. [2021-11-16 20:15:43,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 172 states have (on average 1.186046511627907) internal successors, (204), 176 states have internal predecessors, (204), 93 states have call successors, (93), 22 states have call predecessors, (93), 26 states have return successors, (115), 93 states have call predecessors, (115), 92 states have call successors, (115) [2021-11-16 20:15:43,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 412 transitions. [2021-11-16 20:15:43,791 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 412 transitions. Word has length 255 [2021-11-16 20:15:43,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:15:43,791 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 412 transitions. [2021-11-16 20:15:43,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-16 20:15:43,791 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 412 transitions. [2021-11-16 20:15:43,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-16 20:15:43,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:15:43,793 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:15:43,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-16 20:15:44,014 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,SelfDestructingSolverStorable10 [2021-11-16 20:15:44,015 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:15:44,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:15:44,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1368188443, now seen corresponding path program 1 times [2021-11-16 20:15:44,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:15:44,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509621263] [2021-11-16 20:15:44,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:44,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:15:44,056 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:15:44,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641252144] [2021-11-16 20:15:44,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:44,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:15:44,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:15:44,072 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:15:44,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-16 20:15:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:44,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 3161 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-16 20:15:44,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:15:50,159 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 49 treesize of output 41 [2021-11-16 20:15:50,162 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 38 treesize of output 30 [2021-11-16 20:15:50,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-11-16 20:15:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 284 proven. 6 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2021-11-16 20:15:50,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:15:51,562 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 9 treesize of output 3 [2021-11-16 20:15:51,564 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-16 20:15:51,680 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 15 [2021-11-16 20:15:51,849 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-16 20:15:51,849 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 23 treesize of output 18 [2021-11-16 20:15:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 30 proven. 78 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-16 20:15:51,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:15:51,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509621263] [2021-11-16 20:15:51,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 20:15:51,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641252144] [2021-11-16 20:15:51,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641252144] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:15:51,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:15:51,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-11-16 20:15:51,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704542869] [2021-11-16 20:15:51,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:15:51,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-16 20:15:51,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:15:51,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-16 20:15:51,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2021-11-16 20:15:51,987 INFO L87 Difference]: Start difference. First operand 292 states and 412 transitions. Second operand has 36 states, 32 states have (on average 5.375) internal successors, (172), 30 states have internal predecessors, (172), 16 states have call successors, (64), 6 states have call predecessors, (64), 12 states have return successors, (61), 15 states have call predecessors, (61), 15 states have call successors, (61) [2021-11-16 20:15:57,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:15:57,376 INFO L93 Difference]: Finished difference Result 1162 states and 1782 transitions. [2021-11-16 20:15:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-16 20:15:57,377 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 5.375) internal successors, (172), 30 states have internal predecessors, (172), 16 states have call successors, (64), 6 states have call predecessors, (64), 12 states have return successors, (61), 15 states have call predecessors, (61), 15 states have call successors, (61) Word has length 255 [2021-11-16 20:15:57,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:15:57,384 INFO L225 Difference]: With dead ends: 1162 [2021-11-16 20:15:57,384 INFO L226 Difference]: Without dead ends: 905 [2021-11-16 20:15:57,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 473 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=316, Invalid=2546, Unknown=0, NotChecked=0, Total=2862 [2021-11-16 20:15:57,388 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 791 mSDsluCounter, 7587 mSDsCounter, 0 mSdLazyCounter, 5043 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 8072 SdHoareTripleChecker+Invalid, 7710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 5043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2395 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-16 20:15:57,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 8072 Invalid, 7710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 5043 Invalid, 0 Unknown, 2395 Unchecked, 4.7s Time] [2021-11-16 20:15:57,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-11-16 20:15:57,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 824. [2021-11-16 20:15:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 482 states have (on average 1.1784232365145229) internal successors, (568), 490 states have internal predecessors, (568), 269 states have call successors, (269), 62 states have call predecessors, (269), 72 states have return successors, (451), 271 states have call predecessors, (451), 266 states have call successors, (451) [2021-11-16 20:15:57,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1288 transitions. [2021-11-16 20:15:57,437 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1288 transitions. Word has length 255 [2021-11-16 20:15:57,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:15:57,438 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 1288 transitions. [2021-11-16 20:15:57,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 5.375) internal successors, (172), 30 states have internal predecessors, (172), 16 states have call successors, (64), 6 states have call predecessors, (64), 12 states have return successors, (61), 15 states have call predecessors, (61), 15 states have call successors, (61) [2021-11-16 20:15:57,438 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1288 transitions. [2021-11-16 20:15:57,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-16 20:15:57,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:15:57,441 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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] [2021-11-16 20:15:57,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-16 20:15:57,655 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,SelfDestructingSolverStorable11 [2021-11-16 20:15:57,655 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:15:57,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:15:57,656 INFO L85 PathProgramCache]: Analyzing trace with hash 366917770, now seen corresponding path program 1 times [2021-11-16 20:15:57,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:15:57,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700202580] [2021-11-16 20:15:57,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:57,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:15:57,691 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:15:57,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952151381] [2021-11-16 20:15:57,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:15:57,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:15:57,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:15:57,692 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:15:57,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-16 20:15:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:15:58,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-16 20:15:58,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:15:58,219 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 20:15:58,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-16 20:15:58,398 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 20:15:58,467 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-16 20:15:58,467 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 20:15:58,502 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-16 20:15:58,502 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 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-16 20:16:00,653 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int)) (= |c_#memory_$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|))))) is different from true [2021-11-16 20:16:00,981 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-16 20:16:00,981 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 23 [2021-11-16 20:16:00,988 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-16 20:16:00,988 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 20 treesize of output 20 [2021-11-16 20:16:01,127 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 9 treesize of output 3 [2021-11-16 20:16:45,654 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (= (store |c_old(#memory_$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 20:18:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 312 proven. 53 refuted. 0 times theorem prover too weak. 189 trivial. 3 not checked. [2021-11-16 20:18:41,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:18:42,866 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_141| Int) (v_DerPreprocessor_1 Int)) (not (= (select (select (store |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_141| (store (select |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_141|) 0 v_DerPreprocessor_1)) |c_ULTIMATE.start_aws_array_list_set_at_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_array_list_set_at_harness_~#list~0#1.offset| 32)) 0))) is different from false [2021-11-16 20:18:42,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:18:42,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700202580] [2021-11-16 20:18:42,867 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 20:18:42,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952151381] [2021-11-16 20:18:42,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952151381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:18:42,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:18:42,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-11-16 20:18:42,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49362125] [2021-11-16 20:18:42,868 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-16 20:18:42,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-16 20:18:42,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:18:42,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-16 20:18:42,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=902, Unknown=63, NotChecked=192, Total=1260 [2021-11-16 20:18:42,869 INFO L87 Difference]: Start difference. First operand 824 states and 1288 transitions. Second operand has 35 states, 32 states have (on average 3.5625) internal successors, (114), 29 states have internal predecessors, (114), 13 states have call successors, (36), 10 states have call predecessors, (36), 12 states have return successors, (34), 13 states have call predecessors, (34), 13 states have call successors, (34) [2021-11-16 20:19:21,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:19:21,641 INFO L93 Difference]: Finished difference Result 1179 states and 1869 transitions. [2021-11-16 20:19:21,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-16 20:19:21,642 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 3.5625) internal successors, (114), 29 states have internal predecessors, (114), 13 states have call successors, (36), 10 states have call predecessors, (36), 12 states have return successors, (34), 13 states have call predecessors, (34), 13 states have call successors, (34) Word has length 261 [2021-11-16 20:19:21,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:19:21,648 INFO L225 Difference]: With dead ends: 1179 [2021-11-16 20:19:21,648 INFO L226 Difference]: Without dead ends: 920 [2021-11-16 20:19:21,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 365 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 200.3s TimeCoverageRelationStatistics Valid=213, Invalid=1887, Unknown=74, NotChecked=276, Total=2450 [2021-11-16 20:19:21,652 INFO L933 BasicCegarLoop]: 353 mSDtfsCounter, 346 mSDsluCounter, 2506 mSDsCounter, 0 mSdLazyCounter, 1944 mSolverCounterSat, 502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 2859 SdHoareTripleChecker+Invalid, 7025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 1944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4579 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-16 20:19:21,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 2859 Invalid, 7025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [502 Valid, 1944 Invalid, 0 Unknown, 4579 Unchecked, 1.7s Time] [2021-11-16 20:19:21,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-11-16 20:19:21,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 889. [2021-11-16 20:19:21,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 526 states have (on average 1.1711026615969582) internal successors, (616), 537 states have internal predecessors, (616), 278 states have call successors, (278), 70 states have call predecessors, (278), 84 states have return successors, (541), 281 states have call predecessors, (541), 275 states have call successors, (541) [2021-11-16 20:19:21,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1435 transitions. [2021-11-16 20:19:21,714 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1435 transitions. Word has length 261 [2021-11-16 20:19:21,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:19:21,715 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 1435 transitions. [2021-11-16 20:19:21,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 3.5625) internal successors, (114), 29 states have internal predecessors, (114), 13 states have call successors, (36), 10 states have call predecessors, (36), 12 states have return successors, (34), 13 states have call predecessors, (34), 13 states have call successors, (34) [2021-11-16 20:19:21,715 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1435 transitions. [2021-11-16 20:19:21,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-11-16 20:19:21,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:19:21,717 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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] [2021-11-16 20:19:21,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-16 20:19:21,935 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,SelfDestructingSolverStorable12 [2021-11-16 20:19:21,935 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:19:21,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:19:21,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1844390939, now seen corresponding path program 1 times [2021-11-16 20:19:21,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:19:21,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902768870] [2021-11-16 20:19:21,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:19:21,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:19:21,970 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:19:21,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949565148] [2021-11-16 20:19:21,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:19:21,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:19:21,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:19:21,988 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:19:22,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-16 20:19:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:19:22,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 3197 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-16 20:19:22,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:19:22,506 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 20:19:22,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-16 20:19:22,720 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 20:19:22,813 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 20:19:22,910 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-16 20:19:22,911 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 20:19:23,002 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-16 20:19:23,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-16 20:19:25,179 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int)) (= |c_#memory_$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|))))) is different from true [2021-11-16 20:19:34,436 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-16 20:19:34,436 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 44 treesize of output 32 [2021-11-16 20:19:34,480 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-16 20:19:34,481 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 29 treesize of output 31 [2021-11-16 20:19:34,756 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 9 treesize of output 3 [2021-11-16 20:20:19,938 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (= (store |c_old(#memory_$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 20:22:16,382 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 312 proven. 53 refuted. 0 times theorem prover too weak. 189 trivial. 3 not checked. [2021-11-16 20:22:16,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:22:18,942 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_2 Int) (|v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_171| Int)) (not (= 0 (select (select (store |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_171| (store (select |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_171|) 0 v_DerPreprocessor_2)) |c_ULTIMATE.start_aws_array_list_set_at_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_array_list_set_at_harness_~#list~0#1.offset| 32))))) is different from false [2021-11-16 20:22:18,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:22:18,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902768870] [2021-11-16 20:22:18,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 20:22:18,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949565148] [2021-11-16 20:22:18,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949565148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:22:18,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:22:18,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-11-16 20:22:18,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14089319] [2021-11-16 20:22:18,945 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-16 20:22:18,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-16 20:22:18,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:22:18,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-16 20:22:18,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=898, Unknown=67, NotChecked=192, Total=1260 [2021-11-16 20:22:18,946 INFO L87 Difference]: Start difference. First operand 889 states and 1435 transitions. Second operand has 35 states, 32 states have (on average 3.65625) internal successors, (117), 29 states have internal predecessors, (117), 13 states have call successors, (37), 10 states have call predecessors, (37), 12 states have return successors, (35), 13 states have call predecessors, (35), 13 states have call successors, (35) [2021-11-16 20:22:59,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:22:59,565 INFO L93 Difference]: Finished difference Result 1256 states and 1993 transitions. [2021-11-16 20:22:59,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-16 20:22:59,566 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 3.65625) internal successors, (117), 29 states have internal predecessors, (117), 13 states have call successors, (37), 10 states have call predecessors, (37), 12 states have return successors, (35), 13 states have call predecessors, (35), 13 states have call successors, (35) Word has length 266 [2021-11-16 20:22:59,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:22:59,570 INFO L225 Difference]: With dead ends: 1256 [2021-11-16 20:22:59,571 INFO L226 Difference]: Without dead ends: 982 [2021-11-16 20:22:59,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 368 SyntacticMatches, 12 SemanticMatches, 48 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 211.9s TimeCoverageRelationStatistics Valid=213, Invalid=1883, Unknown=78, NotChecked=276, Total=2450 [2021-11-16 20:22:59,573 INFO L933 BasicCegarLoop]: 358 mSDtfsCounter, 316 mSDsluCounter, 2136 mSDsCounter, 0 mSdLazyCounter, 1622 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 2494 SdHoareTripleChecker+Invalid, 6132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 1622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4117 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:22:59,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 2494 Invalid, 6132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 1622 Invalid, 0 Unknown, 4117 Unchecked, 3.0s Time] [2021-11-16 20:22:59,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-11-16 20:22:59,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 888. [2021-11-16 20:22:59,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 526 states have (on average 1.1711026615969582) internal successors, (616), 536 states have internal predecessors, (616), 277 states have call successors, (277), 71 states have call predecessors, (277), 84 states have return successors, (537), 280 states have call predecessors, (537), 274 states have call successors, (537) [2021-11-16 20:22:59,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1430 transitions. [2021-11-16 20:22:59,616 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1430 transitions. Word has length 266 [2021-11-16 20:22:59,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:22:59,617 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1430 transitions. [2021-11-16 20:22:59,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 3.65625) internal successors, (117), 29 states have internal predecessors, (117), 13 states have call successors, (37), 10 states have call predecessors, (37), 12 states have return successors, (35), 13 states have call predecessors, (35), 13 states have call successors, (35) [2021-11-16 20:22:59,617 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1430 transitions. [2021-11-16 20:22:59,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-11-16 20:22:59,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:22:59,620 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:22:59,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-16 20:22:59,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:22:59,840 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:22:59,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:22:59,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1304713533, now seen corresponding path program 1 times [2021-11-16 20:22:59,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:22:59,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992482491] [2021-11-16 20:22:59,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:22:59,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:22:59,870 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:22:59,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130441252] [2021-11-16 20:22:59,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:22:59,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:22:59,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:22:59,872 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:22:59,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-16 20:23:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:23:00,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 3241 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-16 20:23:00,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:23:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 347 proven. 1 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2021-11-16 20:23:01,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:23:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 46 proven. 81 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2021-11-16 20:23:03,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:23:03,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992482491] [2021-11-16 20:23:03,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 20:23:03,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130441252] [2021-11-16 20:23:03,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130441252] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:23:03,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:23:03,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 31 [2021-11-16 20:23:03,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137217724] [2021-11-16 20:23:03,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:23:03,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-16 20:23:03,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:23:03,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-16 20:23:03,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2021-11-16 20:23:03,097 INFO L87 Difference]: Start difference. First operand 888 states and 1430 transitions. Second operand has 31 states, 27 states have (on average 5.2592592592592595) internal successors, (142), 22 states have internal predecessors, (142), 7 states have call successors, (50), 3 states have call predecessors, (50), 10 states have return successors, (52), 10 states have call predecessors, (52), 6 states have call successors, (52) [2021-11-16 20:23:04,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:23:04,991 INFO L93 Difference]: Finished difference Result 1627 states and 2689 transitions. [2021-11-16 20:23:04,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-16 20:23:04,993 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 5.2592592592592595) internal successors, (142), 22 states have internal predecessors, (142), 7 states have call successors, (50), 3 states have call predecessors, (50), 10 states have return successors, (52), 10 states have call predecessors, (52), 6 states have call successors, (52) Word has length 285 [2021-11-16 20:23:04,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:23:04,998 INFO L225 Difference]: With dead ends: 1627 [2021-11-16 20:23:04,998 INFO L226 Difference]: Without dead ends: 901 [2021-11-16 20:23:05,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 538 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2021-11-16 20:23:05,004 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 37 mSDsluCounter, 9500 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 9874 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-16 20:23:05,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 9874 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-16 20:23:05,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-11-16 20:23:05,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 895. [2021-11-16 20:23:05,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 532 states have (on average 1.169172932330827) internal successors, (622), 543 states have internal predecessors, (622), 277 states have call successors, (277), 71 states have call predecessors, (277), 85 states have return successors, (563), 280 states have call predecessors, (563), 274 states have call successors, (563) [2021-11-16 20:23:05,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1462 transitions. [2021-11-16 20:23:05,051 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1462 transitions. Word has length 285 [2021-11-16 20:23:05,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:23:05,053 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 1462 transitions. [2021-11-16 20:23:05,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 5.2592592592592595) internal successors, (142), 22 states have internal predecessors, (142), 7 states have call successors, (50), 3 states have call predecessors, (50), 10 states have return successors, (52), 10 states have call predecessors, (52), 6 states have call successors, (52) [2021-11-16 20:23:05,053 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1462 transitions. [2021-11-16 20:23:05,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-16 20:23:05,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:23:05,056 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2021-11-16 20:23:05,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-16 20:23:05,276 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,SelfDestructingSolverStorable14 [2021-11-16 20:23:05,277 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:23:05,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:23:05,277 INFO L85 PathProgramCache]: Analyzing trace with hash -975929849, now seen corresponding path program 2 times [2021-11-16 20:23:05,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:23:05,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8430999] [2021-11-16 20:23:05,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:23:05,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:23:05,314 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:23:05,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701664950] [2021-11-16 20:23:05,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 20:23:05,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:23:05,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:23:05,320 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:23:05,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-16 20:23:06,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 20:23:06,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 20:23:06,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 3225 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-16 20:23:06,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:23:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 345 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-16 20:23:07,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:23:07,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:23:07,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8430999] [2021-11-16 20:23:07,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 20:23:07,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701664950] [2021-11-16 20:23:07,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701664950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:23:07,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:23:07,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-16 20:23:07,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120292199] [2021-11-16 20:23:07,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:23:07,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-16 20:23:07,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:23:07,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-16 20:23:07,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-16 20:23:07,186 INFO L87 Difference]: Start difference. First operand 895 states and 1462 transitions. Second operand has 12 states, 11 states have (on average 9.727272727272727) internal successors, (107), 9 states have internal predecessors, (107), 3 states have call successors, (35), 2 states have call predecessors, (35), 6 states have return successors, (34), 5 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-16 20:23:07,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:23:07,854 INFO L93 Difference]: Finished difference Result 1604 states and 2663 transitions. [2021-11-16 20:23:07,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-16 20:23:07,855 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 9.727272727272727) internal successors, (107), 9 states have internal predecessors, (107), 3 states have call successors, (35), 2 states have call predecessors, (35), 6 states have return successors, (34), 5 states have call predecessors, (34), 3 states have call successors, (34) Word has length 279 [2021-11-16 20:23:07,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:23:07,859 INFO L225 Difference]: With dead ends: 1604 [2021-11-16 20:23:07,859 INFO L226 Difference]: Without dead ends: 895 [2021-11-16 20:23:07,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-16 20:23:07,863 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 11 mSDsluCounter, 3690 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4067 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-16 20:23:07,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 4067 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-16 20:23:07,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-11-16 20:23:07,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 895. [2021-11-16 20:23:07,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 532 states have (on average 1.169172932330827) internal successors, (622), 543 states have internal predecessors, (622), 277 states have call successors, (277), 71 states have call predecessors, (277), 85 states have return successors, (554), 280 states have call predecessors, (554), 274 states have call successors, (554) [2021-11-16 20:23:07,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1453 transitions. [2021-11-16 20:23:07,903 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1453 transitions. Word has length 279 [2021-11-16 20:23:07,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:23:07,903 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 1453 transitions. [2021-11-16 20:23:07,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 9.727272727272727) internal successors, (107), 9 states have internal predecessors, (107), 3 states have call successors, (35), 2 states have call predecessors, (35), 6 states have return successors, (34), 5 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-16 20:23:07,904 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1453 transitions. [2021-11-16 20:23:07,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-16 20:23:07,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:23:07,906 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:23:07,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-16 20:23:08,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-16 20:23:08,143 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:23:08,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:23:08,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1343783589, now seen corresponding path program 1 times [2021-11-16 20:23:08,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:23:08,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133063209] [2021-11-16 20:23:08,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:23:08,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:23:08,170 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:23:08,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477773138] [2021-11-16 20:23:08,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:23:08,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:23:08,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:23:08,172 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:23:08,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-16 20:23:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:23:08,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 3161 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-16 20:23:08,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:23:08,678 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 20:23:17,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:23:17,218 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 20:23:17,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:23:17,232 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 20:23:21,555 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 20:23:23,243 INFO L354 Elim1Store]: treesize reduction 43, result has 2.3 percent of original size [2021-11-16 20:23:23,244 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 59 treesize of output 1 [2021-11-16 20:23:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 175 proven. 4 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-11-16 20:23:23,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:23:24,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:23:24,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133063209] [2021-11-16 20:23:24,768 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 20:23:24,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477773138] [2021-11-16 20:23:24,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477773138] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:23:24,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:23:24,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-16 20:23:24,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282564558] [2021-11-16 20:23:24,768 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-16 20:23:24,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-16 20:23:24,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:23:24,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-16 20:23:24,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=4, NotChecked=28, Total=272 [2021-11-16 20:23:24,769 INFO L87 Difference]: Start difference. First operand 895 states and 1453 transitions. Second operand has 16 states, 15 states have (on average 6.133333333333334) internal successors, (92), 14 states have internal predecessors, (92), 5 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) [2021-11-16 20:23:31,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:23:31,186 INFO L93 Difference]: Finished difference Result 1518 states and 2575 transitions. [2021-11-16 20:23:31,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-16 20:23:31,187 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 6.133333333333334) internal successors, (92), 14 states have internal predecessors, (92), 5 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) Word has length 255 [2021-11-16 20:23:31,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:23:31,192 INFO L225 Difference]: With dead ends: 1518 [2021-11-16 20:23:31,192 INFO L226 Difference]: Without dead ends: 955 [2021-11-16 20:23:31,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 442 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=51, Invalid=253, Unknown=6, NotChecked=32, Total=342 [2021-11-16 20:23:31,195 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 102 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 3349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2065 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:23:31,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 1680 Invalid, 3349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1168 Invalid, 0 Unknown, 2065 Unchecked, 2.2s Time] [2021-11-16 20:23:31,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-11-16 20:23:31,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 900. [2021-11-16 20:23:31,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 536 states have (on average 1.1679104477611941) internal successors, (626), 548 states have internal predecessors, (626), 277 states have call successors, (277), 71 states have call predecessors, (277), 86 states have return successors, (603), 280 states have call predecessors, (603), 274 states have call successors, (603) [2021-11-16 20:23:31,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1506 transitions. [2021-11-16 20:23:31,239 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1506 transitions. Word has length 255 [2021-11-16 20:23:31,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:23:31,239 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 1506 transitions. [2021-11-16 20:23:31,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 6.133333333333334) internal successors, (92), 14 states have internal predecessors, (92), 5 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) [2021-11-16 20:23:31,240 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1506 transitions. [2021-11-16 20:23:31,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-16 20:23:31,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:23:31,242 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:23:31,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-16 20:23:31,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-16 20:23:31,463 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:23:31,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:23:31,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1637353821, now seen corresponding path program 1 times [2021-11-16 20:23:31,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:23:31,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871658055] [2021-11-16 20:23:31,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:23:31,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:23:31,494 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:23:31,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520766871] [2021-11-16 20:23:31,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:23:31,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:23:31,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:23:31,495 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:23:31,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-16 20:23:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:23:31,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 3166 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-16 20:23:31,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:23:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2021-11-16 20:23:32,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:23:32,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:23:32,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871658055] [2021-11-16 20:23:32,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 20:23:32,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520766871] [2021-11-16 20:23:32,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520766871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:23:32,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:23:32,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-16 20:23:32,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745519331] [2021-11-16 20:23:32,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:23:32,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 20:23:32,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:23:32,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 20:23:32,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-16 20:23:32,592 INFO L87 Difference]: Start difference. First operand 900 states and 1506 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-16 20:23:33,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:23:33,088 INFO L93 Difference]: Finished difference Result 1694 states and 2921 transitions. [2021-11-16 20:23:33,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:23:33,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 255 [2021-11-16 20:23:33,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:23:33,093 INFO L225 Difference]: With dead ends: 1694 [2021-11-16 20:23:33,093 INFO L226 Difference]: Without dead ends: 875 [2021-11-16 20:23:33,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-16 20:23:33,104 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 13 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:23:33,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1386 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-16 20:23:33,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-11-16 20:23:33,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 874. [2021-11-16 20:23:33,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 520 states have (on average 1.1634615384615385) internal successors, (605), 532 states have internal predecessors, (605), 269 states have call successors, (269), 71 states have call predecessors, (269), 84 states have return successors, (526), 270 states have call predecessors, (526), 266 states have call successors, (526) [2021-11-16 20:23:33,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1400 transitions. [2021-11-16 20:23:33,144 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1400 transitions. Word has length 255 [2021-11-16 20:23:33,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:23:33,145 INFO L470 AbstractCegarLoop]: Abstraction has 874 states and 1400 transitions. [2021-11-16 20:23:33,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-16 20:23:33,145 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1400 transitions. [2021-11-16 20:23:33,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-11-16 20:23:33,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:23:33,147 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2021-11-16 20:23:33,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-16 20:23:33,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-16 20:23:33,368 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:23:33,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:23:33,368 INFO L85 PathProgramCache]: Analyzing trace with hash -396923358, now seen corresponding path program 1 times [2021-11-16 20:23:33,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:23:33,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028554336] [2021-11-16 20:23:33,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:23:33,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:23:33,412 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:23:33,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388947911] [2021-11-16 20:23:33,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:23:33,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:23:33,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:23:33,413 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:23:33,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-16 20:23:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:23:33,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 3248 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-16 20:23:33,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:23:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 239 proven. 0 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-11-16 20:23:34,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:23:34,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:23:34,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028554336] [2021-11-16 20:23:34,658 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 20:23:34,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388947911] [2021-11-16 20:23:34,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388947911] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:23:34,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:23:34,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-16 20:23:34,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023343125] [2021-11-16 20:23:34,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:23:34,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-16 20:23:34,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:23:34,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-16 20:23:34,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-11-16 20:23:34,659 INFO L87 Difference]: Start difference. First operand 874 states and 1400 transitions. Second operand has 14 states, 13 states have (on average 7.846153846153846) internal successors, (102), 11 states have internal predecessors, (102), 3 states have call successors, (36), 2 states have call predecessors, (36), 6 states have return successors, (34), 5 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-16 20:23:35,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:23:35,431 INFO L93 Difference]: Finished difference Result 1381 states and 2254 transitions. [2021-11-16 20:23:35,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-16 20:23:35,432 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 7.846153846153846) internal successors, (102), 11 states have internal predecessors, (102), 3 states have call successors, (36), 2 states have call predecessors, (36), 6 states have return successors, (34), 5 states have call predecessors, (34), 3 states have call successors, (34) Word has length 285 [2021-11-16 20:23:35,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:23:35,436 INFO L225 Difference]: With dead ends: 1381 [2021-11-16 20:23:35,436 INFO L226 Difference]: Without dead ends: 865 [2021-11-16 20:23:35,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-11-16 20:23:35,439 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 11 mSDsluCounter, 4387 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4761 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-16 20:23:35,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 4761 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-16 20:23:35,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-11-16 20:23:35,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 858. [2021-11-16 20:23:35,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 510 states have (on average 1.1647058823529413) internal successors, (594), 521 states have internal predecessors, (594), 265 states have call successors, (265), 71 states have call predecessors, (265), 82 states have return successors, (423), 265 states have call predecessors, (423), 262 states have call successors, (423) [2021-11-16 20:23:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1282 transitions. [2021-11-16 20:23:35,473 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1282 transitions. Word has length 285 [2021-11-16 20:23:35,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:23:35,473 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 1282 transitions. [2021-11-16 20:23:35,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 7.846153846153846) internal successors, (102), 11 states have internal predecessors, (102), 3 states have call successors, (36), 2 states have call predecessors, (36), 6 states have return successors, (34), 5 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-16 20:23:35,473 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1282 transitions. [2021-11-16 20:23:35,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-11-16 20:23:35,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:23:35,476 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:23:35,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-16 20:23:35,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:23:35,693 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:23:35,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:23:35,693 INFO L85 PathProgramCache]: Analyzing trace with hash -71025297, now seen corresponding path program 1 times [2021-11-16 20:23:35,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:23:35,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696850111] [2021-11-16 20:23:35,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:23:35,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:23:35,741 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:23:35,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997064039] [2021-11-16 20:23:35,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:23:35,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:23:35,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:23:35,744 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:23:35,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-16 20:23:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:23:36,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 3230 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-16 20:23:36,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:23:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 300 proven. 8 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-11-16 20:23:37,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:23:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 63 proven. 31 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2021-11-16 20:23:38,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:23:38,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696850111] [2021-11-16 20:23:38,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 20:23:38,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997064039] [2021-11-16 20:23:38,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997064039] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:23:38,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:23:38,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 28 [2021-11-16 20:23:38,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243660718] [2021-11-16 20:23:38,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:23:38,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-16 20:23:38,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:23:38,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-16 20:23:38,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=697, Unknown=0, NotChecked=0, Total=756 [2021-11-16 20:23:38,810 INFO L87 Difference]: Start difference. First operand 858 states and 1282 transitions. Second operand has 28 states, 24 states have (on average 6.0) internal successors, (144), 19 states have internal predecessors, (144), 7 states have call successors, (48), 3 states have call predecessors, (48), 9 states have return successors, (51), 11 states have call predecessors, (51), 6 states have call successors, (51) [2021-11-16 20:23:40,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:23:40,380 INFO L93 Difference]: Finished difference Result 1545 states and 2332 transitions. [2021-11-16 20:23:40,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-16 20:23:40,381 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 6.0) internal successors, (144), 19 states have internal predecessors, (144), 7 states have call successors, (48), 3 states have call predecessors, (48), 9 states have return successors, (51), 11 states have call predecessors, (51), 6 states have call successors, (51) Word has length 280 [2021-11-16 20:23:40,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:23:40,385 INFO L225 Difference]: With dead ends: 1545 [2021-11-16 20:23:40,385 INFO L226 Difference]: Without dead ends: 864 [2021-11-16 20:23:40,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 531 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2021-11-16 20:23:40,388 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 35 mSDsluCounter, 8635 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 9002 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-16 20:23:40,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 9002 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-16 20:23:40,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-11-16 20:23:40,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 858. [2021-11-16 20:23:40,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 510 states have (on average 1.1647058823529413) internal successors, (594), 521 states have internal predecessors, (594), 265 states have call successors, (265), 71 states have call predecessors, (265), 82 states have return successors, (420), 265 states have call predecessors, (420), 262 states have call successors, (420) [2021-11-16 20:23:40,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1279 transitions. [2021-11-16 20:23:40,435 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1279 transitions. Word has length 280 [2021-11-16 20:23:40,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:23:40,435 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 1279 transitions. [2021-11-16 20:23:40,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 6.0) internal successors, (144), 19 states have internal predecessors, (144), 7 states have call successors, (48), 3 states have call predecessors, (48), 9 states have return successors, (51), 11 states have call predecessors, (51), 6 states have call successors, (51) [2021-11-16 20:23:40,436 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1279 transitions. [2021-11-16 20:23:40,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-16 20:23:40,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:23:40,438 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:23:40,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-16 20:23:40,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:23:40,659 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:23:40,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:23:40,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1719608781, now seen corresponding path program 1 times [2021-11-16 20:23:40,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:23:40,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728139524] [2021-11-16 20:23:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:23:40,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:23:40,694 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:23:40,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828362011] [2021-11-16 20:23:40,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:23:40,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:23:40,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:23:40,696 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:23:40,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-16 20:23:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:23:41,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 3182 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-16 20:23:41,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:23:41,176 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 20:23:49,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:23:49,748 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 20:23:49,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:23:49,761 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 20:23:52,021 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 20:23:52,417 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-16 20:23:52,418 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 59 treesize of output 47 [2021-11-16 20:23:52,450 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-16 20:23:52,450 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 44 treesize of output 32 [2021-11-16 20:23:52,469 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-16 20:23:52,469 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 29 [2021-11-16 20:23:53,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-16 20:23:53,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-16 20:23:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 279 proven. 20 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2021-11-16 20:23:53,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:23:54,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:23:54,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728139524] [2021-11-16 20:23:54,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 20:23:54,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828362011] [2021-11-16 20:23:54,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828362011] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:23:54,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:23:54,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-16 20:23:54,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63806501] [2021-11-16 20:23:54,854 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-16 20:23:54,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-16 20:23:54,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:23:54,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-16 20:23:54,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=196, Unknown=3, NotChecked=28, Total=272 [2021-11-16 20:23:54,855 INFO L87 Difference]: Start difference. First operand 858 states and 1279 transitions. Second operand has 15 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 7 states have call successors, (34), 6 states have call predecessors, (34), 7 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-16 20:24:03,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:24:03,032 INFO L93 Difference]: Finished difference Result 965 states and 1431 transitions. [2021-11-16 20:24:03,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-16 20:24:03,033 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 7 states have call successors, (34), 6 states have call predecessors, (34), 7 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) Word has length 262 [2021-11-16 20:24:03,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:24:03,036 INFO L225 Difference]: With dead ends: 965 [2021-11-16 20:24:03,036 INFO L226 Difference]: Without dead ends: 607 [2021-11-16 20:24:03,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 451 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=68, Invalid=310, Unknown=6, NotChecked=36, Total=420 [2021-11-16 20:24:03,037 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 193 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 2517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1407 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-16 20:24:03,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1392 Invalid, 2517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 865 Invalid, 0 Unknown, 1407 Unchecked, 1.9s Time] [2021-11-16 20:24:03,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-16 20:24:03,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 571. [2021-11-16 20:24:03,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 340 states have (on average 1.1647058823529413) internal successors, (396), 347 states have internal predecessors, (396), 176 states have call successors, (176), 46 states have call predecessors, (176), 54 states have return successors, (291), 177 states have call predecessors, (291), 174 states have call successors, (291) [2021-11-16 20:24:03,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 863 transitions. [2021-11-16 20:24:03,061 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 863 transitions. Word has length 262 [2021-11-16 20:24:03,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:24:03,061 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 863 transitions. [2021-11-16 20:24:03,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 7 states have call successors, (34), 6 states have call predecessors, (34), 7 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-16 20:24:03,062 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 863 transitions. [2021-11-16 20:24:03,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-16 20:24:03,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:24:03,063 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 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] [2021-11-16 20:24:03,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-16 20:24:03,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:24:03,285 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:24:03,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:24:03,286 INFO L85 PathProgramCache]: Analyzing trace with hash 165463492, now seen corresponding path program 1 times [2021-11-16 20:24:03,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:24:03,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822818105] [2021-11-16 20:24:03,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:24:03,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:24:03,313 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:24:03,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943404068] [2021-11-16 20:24:03,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:24:03,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:24:03,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:24:03,314 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:24:03,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-16 20:24:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:24:03,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 3189 conjuncts, 138 conjunts are in the unsatisfiable core [2021-11-16 20:24:03,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:24:03,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-16 20:24:04,168 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-16 20:24:04,169 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 20:24:06,469 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (= |c_#memory_$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|))))) is different from true [2021-11-16 20:24:17,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:24:17,464 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 31 treesize of output 19 [2021-11-16 20:24:41,578 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 20:25:10,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:25:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 331 proven. 19 refuted. 1 times theorem prover too weak. 205 trivial. 3 not checked. [2021-11-16 20:25:11,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:25:13,793 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_335| Int) (v_DerPreprocessor_8 Int)) (not (= (select (select (store |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_335| (store (select |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_335|) 0 v_DerPreprocessor_8)) |c_aws_array_list_set_at_~list#1.base|) (+ 32 |c_aws_array_list_set_at_~list#1.offset|)) 0))) is different from false [2021-11-16 20:25:13,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:25:13,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822818105] [2021-11-16 20:25:13,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 20:25:13,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943404068] [2021-11-16 20:25:13,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943404068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:25:13,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:25:13,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-16 20:25:13,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993447304] [2021-11-16 20:25:13,796 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-16 20:25:13,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-16 20:25:13,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:25:13,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-16 20:25:13,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=666, Unknown=23, NotChecked=162, Total=930 [2021-11-16 20:25:13,797 INFO L87 Difference]: Start difference. First operand 571 states and 863 transitions. Second operand has 30 states, 27 states have (on average 4.074074074074074) internal successors, (110), 24 states have internal predecessors, (110), 12 states have call successors, (36), 6 states have call predecessors, (36), 10 states have return successors, (34), 12 states have call predecessors, (34), 12 states have call successors, (34) [2021-11-16 20:25:22,175 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (= |c_#memory_$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$.offset| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset|))))) (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (and (= (store |c_old(#memory_$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 20:25:44,591 WARN L227 SmtUtils]: Spent 8.19s on a formula simplification. DAG size of input: 59 DAG size of output: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 20:26:00,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:26:00,904 INFO L93 Difference]: Finished difference Result 891 states and 1413 transitions. [2021-11-16 20:26:00,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-16 20:26:00,904 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 4.074074074074074) internal successors, (110), 24 states have internal predecessors, (110), 12 states have call successors, (36), 6 states have call predecessors, (36), 10 states have return successors, (34), 12 states have call predecessors, (34), 12 states have call successors, (34) Word has length 263 [2021-11-16 20:26:00,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:26:00,908 INFO L225 Difference]: With dead ends: 891 [2021-11-16 20:26:00,908 INFO L226 Difference]: Without dead ends: 620 [2021-11-16 20:26:00,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 338 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 109.6s TimeCoverageRelationStatistics Valid=211, Invalid=1660, Unknown=37, NotChecked=348, Total=2256 [2021-11-16 20:26:00,910 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 284 mSDsluCounter, 3062 mSDsCounter, 0 mSdLazyCounter, 1833 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 3430 SdHoareTripleChecker+Invalid, 6012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 1833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3898 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-16 20:26:00,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 3430 Invalid, 6012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 1833 Invalid, 0 Unknown, 3898 Unchecked, 4.5s Time] [2021-11-16 20:26:00,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-11-16 20:26:00,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 571. [2021-11-16 20:26:00,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 340 states have (on average 1.1647058823529413) internal successors, (396), 347 states have internal predecessors, (396), 176 states have call successors, (176), 46 states have call predecessors, (176), 54 states have return successors, (290), 177 states have call predecessors, (290), 174 states have call successors, (290) [2021-11-16 20:26:00,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 862 transitions. [2021-11-16 20:26:00,936 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 862 transitions. Word has length 263 [2021-11-16 20:26:00,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:26:00,937 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 862 transitions. [2021-11-16 20:26:00,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 4.074074074074074) internal successors, (110), 24 states have internal predecessors, (110), 12 states have call successors, (36), 6 states have call predecessors, (36), 10 states have return successors, (34), 12 states have call predecessors, (34), 12 states have call successors, (34) [2021-11-16 20:26:00,941 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 862 transitions. [2021-11-16 20:26:00,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-16 20:26:00,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:26:00,942 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 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] [2021-11-16 20:26:00,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-16 20:26:01,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:26:01,166 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:26:01,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:26:01,166 INFO L85 PathProgramCache]: Analyzing trace with hash -842494716, now seen corresponding path program 2 times [2021-11-16 20:26:01,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:26:01,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638420712] [2021-11-16 20:26:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:26:01,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:26:01,194 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:26:01,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164723545] [2021-11-16 20:26:01,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 20:26:01,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:26:01,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:26:01,196 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:26:01,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-16 20:26:02,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 20:26:02,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 20:26:02,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 3189 conjuncts, 117 conjunts are in the unsatisfiable core [2021-11-16 20:26:02,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:26:02,065 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 20:26:02,412 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 24 treesize of output 20 [2021-11-16 20:26:02,483 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 23 treesize of output 22 [2021-11-16 20:26:02,683 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-16 20:26:02,684 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 34 treesize of output 27 [2021-11-16 20:26:02,787 INFO L354 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2021-11-16 20:26:02,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-11-16 20:26:05,084 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int)) (= (store |c_old(#memory_$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 20:26:05,315 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-16 20:26:05,316 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 47 treesize of output 29 [2021-11-16 20:26:05,352 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-11-16 20:26:05,353 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 32 treesize of output 34 [2021-11-16 20:26:40,423 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (= (store |c_old(#memory_$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 20:26:42,461 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (= (store |c_old(#memory_$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|)) is different from true [2021-11-16 20:26:42,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:26:42,514 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 26 treesize of output 14 [2021-11-16 20:28:13,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:28:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 325 proven. 53 refuted. 0 times theorem prover too weak. 159 trivial. 22 not checked. [2021-11-16 20:28:13,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:28:16,104 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_359| Int) (v_DerPreprocessor_10 Int)) (not (= (select (select (store |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_359| (store (select |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_359|) 0 v_DerPreprocessor_10)) |c_aws_array_list_set_at_~list#1.base|) (+ 32 |c_aws_array_list_set_at_~list#1.offset|)) 0))) is different from false [2021-11-16 20:28:16,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:28:16,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638420712] [2021-11-16 20:28:16,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 20:28:16,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164723545] [2021-11-16 20:28:16,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164723545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:28:16,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:28:16,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-11-16 20:28:16,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240748004] [2021-11-16 20:28:16,108 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-16 20:28:16,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-16 20:28:16,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:28:16,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-16 20:28:16,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=694, Unknown=38, NotChecked=228, Total=1056 [2021-11-16 20:28:16,109 INFO L87 Difference]: Start difference. First operand 571 states and 862 transitions. Second operand has 32 states, 27 states have (on average 4.481481481481482) internal successors, (121), 29 states have internal predecessors, (121), 14 states have call successors, (37), 9 states have call predecessors, (37), 12 states have return successors, (35), 13 states have call predecessors, (35), 14 states have call successors, (35) [2021-11-16 20:28:42,699 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|aws_array_list_is_valid_~#required_size~0.base| Int)) (and (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |aws_array_list_is_valid_~#required_size~0.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_array_list_is_valid_~#required_size~0.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (select (select |c_#memory_$Pointer$.base| |aws_array_list_is_valid_~#required_size~0.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset|))))) (= (select |c_old(#valid)| |aws_array_list_is_valid_~#required_size~0.base|) 0))) (or (not |c_aws_array_list_is_valid_#t~short131|) (= (select (select |c_#memory_$Pointer$.base| |c_aws_array_list_is_valid_#in~list.base|) (+ 32 |c_aws_array_list_is_valid_#in~list.offset|)) 0)) (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (= (store |c_old(#memory_$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|))) is different from true [2021-11-16 20:28:56,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:28:56,982 INFO L93 Difference]: Finished difference Result 922 states and 1370 transitions. [2021-11-16 20:28:56,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-16 20:28:56,982 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 4.481481481481482) internal successors, (121), 29 states have internal predecessors, (121), 14 states have call successors, (37), 9 states have call predecessors, (37), 12 states have return successors, (35), 13 states have call predecessors, (35), 14 states have call successors, (35) Word has length 263 [2021-11-16 20:28:56,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:28:56,985 INFO L225 Difference]: With dead ends: 922 [2021-11-16 20:28:56,985 INFO L226 Difference]: Without dead ends: 659 [2021-11-16 20:28:56,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 329 SyntacticMatches, 15 SemanticMatches, 47 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 167.3s TimeCoverageRelationStatistics Valid=203, Invalid=1659, Unknown=50, NotChecked=440, Total=2352 [2021-11-16 20:28:56,990 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 216 mSDsluCounter, 2033 mSDsCounter, 0 mSdLazyCounter, 2050 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 2373 SdHoareTripleChecker+Invalid, 5867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 2050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3567 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-16 20:28:56,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 2373 Invalid, 5867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 2050 Invalid, 0 Unknown, 3567 Unchecked, 4.9s Time] [2021-11-16 20:28:56,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-11-16 20:28:57,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 626. [2021-11-16 20:28:57,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 374 states have (on average 1.1524064171122994) internal successors, (431), 382 states have internal predecessors, (431), 189 states have call successors, (189), 54 states have call predecessors, (189), 62 states have return successors, (306), 189 states have call predecessors, (306), 187 states have call successors, (306) [2021-11-16 20:28:57,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 926 transitions. [2021-11-16 20:28:57,013 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 926 transitions. Word has length 263 [2021-11-16 20:28:57,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:28:57,013 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 926 transitions. [2021-11-16 20:28:57,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 4.481481481481482) internal successors, (121), 29 states have internal predecessors, (121), 14 states have call successors, (37), 9 states have call predecessors, (37), 12 states have return successors, (35), 13 states have call predecessors, (35), 14 states have call successors, (35) [2021-11-16 20:28:57,013 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 926 transitions. [2021-11-16 20:28:57,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-16 20:28:57,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:28:57,015 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 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] [2021-11-16 20:28:57,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-16 20:28:57,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:28:57,252 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:28:57,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:28:57,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1670013013, now seen corresponding path program 2 times [2021-11-16 20:28:57,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:28:57,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295059721] [2021-11-16 20:28:57,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:28:57,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:28:57,278 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 20:28:57,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356370709] [2021-11-16 20:28:57,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 20:28:57,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:28:57,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:28:57,281 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:28:57,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-16 20:29:02,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 20:29:02,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 20:29:02,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 3202 conjuncts, 110 conjunts are in the unsatisfiable core [2021-11-16 20:29:02,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:29:06,057 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 Killed by 15