./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_static_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_static_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 23ef598a219073b4e1ea2c3302ab5b9fcd0bd41db1d8d7141c8967f07530c02d --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 11:13:03,781 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 11:13:03,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 11:13:03,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 11:13:03,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 11:13:03,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 11:13:03,803 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 11:13:03,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 11:13:03,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 11:13:03,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 11:13:03,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 11:13:03,807 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 11:13:03,808 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 11:13:03,808 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 11:13:03,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 11:13:03,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 11:13:03,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 11:13:03,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 11:13:03,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 11:13:03,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 11:13:03,815 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 11:13:03,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 11:13:03,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 11:13:03,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 11:13:03,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 11:13:03,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 11:13:03,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 11:13:03,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 11:13:03,821 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 11:13:03,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 11:13:03,822 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 11:13:03,822 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 11:13:03,823 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 11:13:03,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 11:13:03,824 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 11:13:03,824 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 11:13:03,825 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 11:13:03,825 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 11:13:03,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 11:13:03,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 11:13:03,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 11:13:03,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 11:13:03,827 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-12 11:13:03,852 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 11:13:03,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 11:13:03,853 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 11:13:03,854 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 11:13:03,854 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 11:13:03,854 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 11:13:03,855 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 11:13:03,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 11:13:03,855 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 11:13:03,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 11:13:03,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 11:13:03,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 11:13:03,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 11:13:03,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 11:13:03,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 11:13:03,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 11:13:03,857 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 11:13:03,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 11:13:03,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 11:13:03,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 11:13:03,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 11:13:03,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 11:13:03,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 11:13:03,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 11:13:03,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 11:13:03,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 11:13:03,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 11:13:03,859 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 11:13:03,859 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 11:13:03,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 11:13:03,859 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23ef598a219073b4e1ea2c3302ab5b9fcd0bd41db1d8d7141c8967f07530c02d [2022-07-12 11:13:04,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 11:13:04,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 11:13:04,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 11:13:04,064 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 11:13:04,066 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 11:13:04,067 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_static_harness.i [2022-07-12 11:13:04,101 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/777fa9f21/923bc0eb8b3142b7997c973111e7789b/FLAG93c1a1a1f [2022-07-12 11:13:04,601 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 11:13:04,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_static_harness.i [2022-07-12 11:13:04,629 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/777fa9f21/923bc0eb8b3142b7997c973111e7789b/FLAG93c1a1a1f [2022-07-12 11:13:04,826 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/777fa9f21/923bc0eb8b3142b7997c973111e7789b [2022-07-12 11:13:04,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 11:13:04,829 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 11:13:04,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 11:13:04,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 11:13:04,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 11:13:04,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 11:13:04" (1/1) ... [2022-07-12 11:13:04,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c1f5493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:13:04, skipping insertion in model container [2022-07-12 11:13:04,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 11:13:04" (1/1) ... [2022-07-12 11:13:04,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 11:13:04,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 11:13:05,083 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_static_harness.i[4504,4517] [2022-07-12 11:13:05,089 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_static_harness.i[4564,4577] [2022-07-12 11:13:05,496 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-12 11:13:05,531 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:13:05,532 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:13:05,532 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:13:05,532 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:13:05,533 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:13:05,540 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:13:05,540 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:13:05,541 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:13:05,542 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:13:05,712 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-12 11:13:05,713 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-12 11:13:05,713 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-12 11:13:05,721 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-12 11:13:05,722 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-12 11:13:05,723 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-12 11:13:05,724 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-12 11:13:05,724 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-12 11:13:05,726 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-12 11:13:05,727 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-12 11:13:05,814 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:13:05,819 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:13:05,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 11:13:05,909 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 11:13:05,917 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_static_harness.i[4504,4517] [2022-07-12 11:13:05,917 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_static_harness.i[4564,4577] [2022-07-12 11:13:05,953 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-12 11:13:05,969 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:13:05,969 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:13:05,970 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:13:05,970 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:13:05,971 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:13:05,977 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:13:05,978 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:13:05,979 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:13:05,979 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:13:05,999 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-12 11:13:05,999 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-12 11:13:06,000 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-12 11:13:06,000 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-12 11:13:06,001 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-12 11:13:06,002 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-12 11:13:06,002 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-12 11:13:06,002 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-12 11:13:06,002 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-12 11:13:06,003 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-12 11:13:06,019 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:13:06,019 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 11:13:06,032 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 11:13:06,144 INFO L208 MainTranslator]: Completed translation [2022-07-12 11:13:06,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:13:06 WrapperNode [2022-07-12 11:13:06,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 11:13:06,145 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 11:13:06,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 11:13:06,145 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 11:13:06,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:13:06" (1/1) ... [2022-07-12 11:13:06,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:13:06" (1/1) ... [2022-07-12 11:13:06,253 INFO L137 Inliner]: procedures = 689, calls = 1509, calls flagged for inlining = 54, calls inlined = 9, statements flattened = 653 [2022-07-12 11:13:06,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 11:13:06,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 11:13:06,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 11:13:06,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 11:13:06,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:13:06" (1/1) ... [2022-07-12 11:13:06,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:13:06" (1/1) ... [2022-07-12 11:13:06,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:13:06" (1/1) ... [2022-07-12 11:13:06,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:13:06" (1/1) ... [2022-07-12 11:13:06,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:13:06" (1/1) ... [2022-07-12 11:13:06,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:13:06" (1/1) ... [2022-07-12 11:13:06,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:13:06" (1/1) ... [2022-07-12 11:13:06,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 11:13:06,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 11:13:06,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 11:13:06,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 11:13:06,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:13:06" (1/1) ... [2022-07-12 11:13:06,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 11:13:06,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:13:06,346 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) [2022-07-12 11:13:06,364 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 [2022-07-12 11:13:06,376 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-07-12 11:13:06,376 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-07-12 11:13:06,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 11:13:06,376 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2022-07-12 11:13:06,377 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2022-07-12 11:13:06,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 11:13:06,378 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-07-12 11:13:06,378 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-07-12 11:13:06,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-12 11:13:06,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-12 11:13:06,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 11:13:06,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 11:13:06,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 11:13:06,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 11:13:06,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 11:13:06,381 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-07-12 11:13:06,381 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-07-12 11:13:06,381 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2022-07-12 11:13:06,381 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2022-07-12 11:13:06,381 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2022-07-12 11:13:06,382 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2022-07-12 11:13:06,382 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-12 11:13:06,382 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-12 11:13:06,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 11:13:06,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 11:13:06,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 11:13:06,383 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2022-07-12 11:13:06,383 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2022-07-12 11:13:06,383 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-07-12 11:13:06,383 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-07-12 11:13:06,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 11:13:06,384 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2022-07-12 11:13:06,384 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2022-07-12 11:13:06,384 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2022-07-12 11:13:06,384 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2022-07-12 11:13:06,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 11:13:06,622 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 11:13:06,623 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 11:13:07,103 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 11:13:07,110 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 11:13:07,110 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-12 11:13:07,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 11:13:07 BoogieIcfgContainer [2022-07-12 11:13:07,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 11:13:07,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 11:13:07,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 11:13:07,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 11:13:07,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 11:13:04" (1/3) ... [2022-07-12 11:13:07,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@946bf02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 11:13:07, skipping insertion in model container [2022-07-12 11:13:07,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 11:13:06" (2/3) ... [2022-07-12 11:13:07,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@946bf02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 11:13:07, skipping insertion in model container [2022-07-12 11:13:07,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 11:13:07" (3/3) ... [2022-07-12 11:13:07,125 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_init_static_harness.i [2022-07-12 11:13:07,139 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 11:13:07,139 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 11:13:07,186 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 11:13:07,194 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@71b26faf, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1d82497c [2022-07-12 11:13:07,195 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 11:13:07,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 95 states have internal predecessors, (118), 39 states have call successors, (39), 12 states have call predecessors, (39), 12 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-07-12 11:13:07,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-12 11:13:07,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:13:07,209 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 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] [2022-07-12 11:13:07,210 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:13:07,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:13:07,214 INFO L85 PathProgramCache]: Analyzing trace with hash 602311799, now seen corresponding path program 1 times [2022-07-12 11:13:07,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:13:07,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389413434] [2022-07-12 11:13:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:07,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:13:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:13:07,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 11:13:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:13:07,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 11:13:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:13:07,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 11:13:07,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:13:07,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389413434] [2022-07-12 11:13:07,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-07-12 11:13:07,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522932301] [2022-07-12 11:13:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:07,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:07,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:13:07,649 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) [2022-07-12 11:13:07,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 11:13:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:13:08,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 2260 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-12 11:13:08,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:13:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-07-12 11:13:08,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:13:08,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522932301] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:13:08,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:13:08,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 11:13:08,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303555891] [2022-07-12 11:13:08,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:13:08,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 11:13:08,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:13:08,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 11:13:08,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 11:13:08,091 INFO L87 Difference]: Start difference. First operand has 147 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 95 states have internal predecessors, (118), 39 states have call successors, (39), 12 states have call predecessors, (39), 12 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 2 states have call successors, (18) [2022-07-12 11:13:08,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:13:08,131 INFO L93 Difference]: Finished difference Result 291 states and 418 transitions. [2022-07-12 11:13:08,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 11:13:08,133 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 2 states have call successors, (18) Word has length 110 [2022-07-12 11:13:08,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:13:08,141 INFO L225 Difference]: With dead ends: 291 [2022-07-12 11:13:08,141 INFO L226 Difference]: Without dead ends: 141 [2022-07-12 11:13:08,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 11:13:08,150 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 11:13:08,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 11:13:08,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-12 11:13:08,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-07-12 11:13:08,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 90 states have internal predecessors, (106), 39 states have call successors, (39), 12 states have call predecessors, (39), 12 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-07-12 11:13:08,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 183 transitions. [2022-07-12 11:13:08,200 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 183 transitions. Word has length 110 [2022-07-12 11:13:08,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:13:08,201 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 183 transitions. [2022-07-12 11:13:08,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 2 states have call successors, (18) [2022-07-12 11:13:08,201 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 183 transitions. [2022-07-12 11:13:08,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-12 11:13:08,203 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:13:08,203 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 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] [2022-07-12 11:13:08,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 11:13:08,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-12 11:13:08,411 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:13:08,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:13:08,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1578415580, now seen corresponding path program 1 times [2022-07-12 11:13:08,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:13:08,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709151726] [2022-07-12 11:13:08,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:08,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:13:08,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:13:08,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178969944] [2022-07-12 11:13:08,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:08,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:08,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:13:08,480 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) [2022-07-12 11:13:08,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 11:13:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:13:08,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 2337 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 11:13:08,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:13:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2022-07-12 11:13:08,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:13:08,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:13:08,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709151726] [2022-07-12 11:13:08,941 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:13:08,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178969944] [2022-07-12 11:13:08,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178969944] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:13:08,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:13:08,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 11:13:08,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327886553] [2022-07-12 11:13:08,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:13:08,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 11:13:08,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:13:08,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 11:13:08,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 11:13:08,943 INFO L87 Difference]: Start difference. First operand 141 states and 183 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2022-07-12 11:13:09,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:13:09,087 INFO L93 Difference]: Finished difference Result 237 states and 304 transitions. [2022-07-12 11:13:09,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 11:13:09,087 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) Word has length 127 [2022-07-12 11:13:09,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:13:09,090 INFO L225 Difference]: With dead ends: 237 [2022-07-12 11:13:09,090 INFO L226 Difference]: Without dead ends: 143 [2022-07-12 11:13:09,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-12 11:13:09,091 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 62 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 11:13:09,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 829 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 11:13:09,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-12 11:13:09,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-07-12 11:13:09,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 92 states have internal predecessors, (107), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-12 11:13:09,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 186 transitions. [2022-07-12 11:13:09,102 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 186 transitions. Word has length 127 [2022-07-12 11:13:09,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:13:09,103 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 186 transitions. [2022-07-12 11:13:09,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2022-07-12 11:13:09,103 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 186 transitions. [2022-07-12 11:13:09,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-12 11:13:09,104 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:13:09,104 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 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] [2022-07-12 11:13:09,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 11:13:09,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-07-12 11:13:09,315 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:13:09,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:13:09,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1074934923, now seen corresponding path program 1 times [2022-07-12 11:13:09,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:13:09,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526361056] [2022-07-12 11:13:09,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:09,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:13:09,363 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:13:09,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474677076] [2022-07-12 11:13:09,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:09,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:09,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:13:09,365 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) [2022-07-12 11:13:09,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 11:13:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:13:09,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 2473 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 11:13:09,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:13:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-12 11:13:09,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:13:09,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:13:09,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526361056] [2022-07-12 11:13:09,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:13:09,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474677076] [2022-07-12 11:13:09,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474677076] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:13:09,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:13:09,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 11:13:09,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984065582] [2022-07-12 11:13:09,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:13:09,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 11:13:09,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:13:09,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 11:13:09,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 11:13:09,737 INFO L87 Difference]: Start difference. First operand 143 states and 186 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2022-07-12 11:13:09,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:13:09,756 INFO L93 Difference]: Finished difference Result 244 states and 318 transitions. [2022-07-12 11:13:09,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 11:13:09,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) Word has length 142 [2022-07-12 11:13:09,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:13:09,761 INFO L225 Difference]: With dead ends: 244 [2022-07-12 11:13:09,761 INFO L226 Difference]: Without dead ends: 148 [2022-07-12 11:13:09,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 11:13:09,763 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 10 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 536 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 [2022-07-12 11:13:09,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 536 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 11:13:09,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-12 11:13:09,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 145. [2022-07-12 11:13:09,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 92 states have (on average 1.184782608695652) internal successors, (109), 94 states have internal predecessors, (109), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-12 11:13:09,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 188 transitions. [2022-07-12 11:13:09,772 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 188 transitions. Word has length 142 [2022-07-12 11:13:09,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:13:09,772 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 188 transitions. [2022-07-12 11:13:09,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2022-07-12 11:13:09,773 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 188 transitions. [2022-07-12 11:13:09,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-12 11:13:09,774 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:13:09,774 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 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] [2022-07-12 11:13:09,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 11:13:09,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:09,993 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:13:09,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:13:09,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1467961933, now seen corresponding path program 1 times [2022-07-12 11:13:09,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:13:09,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726073668] [2022-07-12 11:13:09,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:09,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:13:10,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:13:10,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208392470] [2022-07-12 11:13:10,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:10,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:10,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:13:10,037 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) [2022-07-12 11:13:10,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 11:13:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:13:10,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 2478 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-12 11:13:10,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:13:10,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-07-12 11:13:12,684 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_585 Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_585)) |c_#memory_$Pointer$.base|)) is different from true [2022-07-12 11:13:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-07-12 11:13:21,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:13:21,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:13:21,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726073668] [2022-07-12 11:13:21,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:13:21,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208392470] [2022-07-12 11:13:21,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208392470] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:13:21,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:13:21,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-12 11:13:21,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752093605] [2022-07-12 11:13:21,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:13:21,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 11:13:21,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:13:21,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 11:13:21,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=203, Unknown=3, NotChecked=28, Total=272 [2022-07-12 11:13:21,042 INFO L87 Difference]: Start difference. First operand 145 states and 188 transitions. Second operand has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 8 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) [2022-07-12 11:13:21,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:13:21,921 INFO L93 Difference]: Finished difference Result 365 states and 500 transitions. [2022-07-12 11:13:21,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 11:13:21,921 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 8 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) Word has length 142 [2022-07-12 11:13:21,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:13:21,923 INFO L225 Difference]: With dead ends: 365 [2022-07-12 11:13:21,923 INFO L226 Difference]: Without dead ends: 267 [2022-07-12 11:13:21,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=65, Invalid=356, Unknown=3, NotChecked=38, Total=462 [2022-07-12 11:13:21,924 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 182 mSDsluCounter, 1205 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 735 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 11:13:21,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 1418 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1164 Invalid, 0 Unknown, 735 Unchecked, 0.7s Time] [2022-07-12 11:13:21,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-07-12 11:13:21,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 153. [2022-07-12 11:13:21,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 99 states have (on average 1.1919191919191918) internal successors, (118), 101 states have internal predecessors, (118), 39 states have call successors, (39), 12 states have call predecessors, (39), 14 states have return successors, (43), 39 states have call predecessors, (43), 38 states have call successors, (43) [2022-07-12 11:13:21,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 200 transitions. [2022-07-12 11:13:21,941 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 200 transitions. Word has length 142 [2022-07-12 11:13:21,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:13:21,942 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 200 transitions. [2022-07-12 11:13:21,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 8 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) [2022-07-12 11:13:21,943 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 200 transitions. [2022-07-12 11:13:21,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-12 11:13:21,945 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:13:21,945 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:13:21,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 11:13:22,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:22,165 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:13:22,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:13:22,166 INFO L85 PathProgramCache]: Analyzing trace with hash -659588909, now seen corresponding path program 1 times [2022-07-12 11:13:22,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:13:22,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944006094] [2022-07-12 11:13:22,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:22,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:13:22,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:13:22,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561723274] [2022-07-12 11:13:22,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:22,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:22,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:13:22,234 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) [2022-07-12 11:13:22,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 11:13:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:13:22,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 2482 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-12 11:13:22,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:13:22,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-07-12 11:13:22,835 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-07-12 11:13:22,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:13:22,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:13:22,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944006094] [2022-07-12 11:13:22,836 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:13:22,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561723274] [2022-07-12 11:13:22,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561723274] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:13:22,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:13:22,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-12 11:13:22,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976163859] [2022-07-12 11:13:22,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:13:22,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 11:13:22,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:13:22,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 11:13:22,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-07-12 11:13:22,838 INFO L87 Difference]: Start difference. First operand 153 states and 200 transitions. Second operand has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 8 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2022-07-12 11:13:23,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:13:23,631 INFO L93 Difference]: Finished difference Result 322 states and 429 transitions. [2022-07-12 11:13:23,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 11:13:23,632 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 8 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 148 [2022-07-12 11:13:23,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:13:23,634 INFO L225 Difference]: With dead ends: 322 [2022-07-12 11:13:23,634 INFO L226 Difference]: Without dead ends: 216 [2022-07-12 11:13:23,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-07-12 11:13:23,635 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 148 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 11:13:23,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 987 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 11:13:23,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-12 11:13:23,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 146. [2022-07-12 11:13:23,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 93 states have (on average 1.1827956989247312) internal successors, (110), 95 states have internal predecessors, (110), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-12 11:13:23,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 189 transitions. [2022-07-12 11:13:23,645 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 189 transitions. Word has length 148 [2022-07-12 11:13:23,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:13:23,645 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 189 transitions. [2022-07-12 11:13:23,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 8 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2022-07-12 11:13:23,646 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 189 transitions. [2022-07-12 11:13:23,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-12 11:13:23,647 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:13:23,647 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 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] [2022-07-12 11:13:23,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 11:13:23,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:23,860 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:13:23,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:13:23,861 INFO L85 PathProgramCache]: Analyzing trace with hash 940161605, now seen corresponding path program 1 times [2022-07-12 11:13:23,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:13:23,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835352287] [2022-07-12 11:13:23,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:23,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:13:23,929 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:13:23,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73138869] [2022-07-12 11:13:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:23,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:23,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:13:23,931 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) [2022-07-12 11:13:23,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 11:13:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:13:24,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 2478 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 11:13:24,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:13:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-12 11:13:24,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:13:24,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:13:24,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835352287] [2022-07-12 11:13:24,366 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:13:24,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73138869] [2022-07-12 11:13:24,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73138869] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:13:24,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:13:24,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 11:13:24,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161605522] [2022-07-12 11:13:24,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:13:24,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 11:13:24,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:13:24,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 11:13:24,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 11:13:24,367 INFO L87 Difference]: Start difference. First operand 146 states and 189 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2022-07-12 11:13:24,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:13:24,486 INFO L93 Difference]: Finished difference Result 250 states and 325 transitions. [2022-07-12 11:13:24,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 11:13:24,486 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) Word has length 144 [2022-07-12 11:13:24,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:13:24,487 INFO L225 Difference]: With dead ends: 250 [2022-07-12 11:13:24,487 INFO L226 Difference]: Without dead ends: 151 [2022-07-12 11:13:24,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 11:13:24,488 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 7 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 11:13:24,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 673 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 11:13:24,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-12 11:13:24,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2022-07-12 11:13:24,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 96 states have internal predecessors, (111), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-12 11:13:24,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 190 transitions. [2022-07-12 11:13:24,495 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 190 transitions. Word has length 144 [2022-07-12 11:13:24,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:13:24,496 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 190 transitions. [2022-07-12 11:13:24,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2022-07-12 11:13:24,496 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 190 transitions. [2022-07-12 11:13:24,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-12 11:13:24,497 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:13:24,497 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 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] [2022-07-12 11:13:24,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 11:13:24,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:24,708 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:13:24,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:13:24,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1620219975, now seen corresponding path program 1 times [2022-07-12 11:13:24,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:13:24,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716448997] [2022-07-12 11:13:24,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:24,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:13:24,753 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:13:24,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431272214] [2022-07-12 11:13:24,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:24,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:24,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:13:24,755 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) [2022-07-12 11:13:24,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 11:13:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:13:25,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 2483 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 11:13:25,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:13:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-12 11:13:25,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:13:25,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:13:25,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716448997] [2022-07-12 11:13:25,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:13:25,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431272214] [2022-07-12 11:13:25,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431272214] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:13:25,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:13:25,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 11:13:25,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858846220] [2022-07-12 11:13:25,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:13:25,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 11:13:25,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:13:25,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 11:13:25,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 11:13:25,153 INFO L87 Difference]: Start difference. First operand 147 states and 190 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2022-07-12 11:13:25,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:13:25,189 INFO L93 Difference]: Finished difference Result 266 states and 340 transitions. [2022-07-12 11:13:25,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 11:13:25,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 144 [2022-07-12 11:13:25,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:13:25,191 INFO L225 Difference]: With dead ends: 266 [2022-07-12 11:13:25,191 INFO L226 Difference]: Without dead ends: 147 [2022-07-12 11:13:25,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 11:13:25,192 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 13 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 11:13:25,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 864 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 11:13:25,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-07-12 11:13:25,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-07-12 11:13:25,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 94 states have (on average 1.1702127659574468) internal successors, (110), 96 states have internal predecessors, (110), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-12 11:13:25,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 189 transitions. [2022-07-12 11:13:25,199 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 189 transitions. Word has length 144 [2022-07-12 11:13:25,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:13:25,199 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 189 transitions. [2022-07-12 11:13:25,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2022-07-12 11:13:25,199 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 189 transitions. [2022-07-12 11:13:25,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-12 11:13:25,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:13:25,200 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 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] [2022-07-12 11:13:25,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 11:13:25,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:25,419 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:13:25,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:13:25,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1782655420, now seen corresponding path program 1 times [2022-07-12 11:13:25,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:13:25,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824950722] [2022-07-12 11:13:25,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:25,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:13:25,456 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:13:25,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985420355] [2022-07-12 11:13:25,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:25,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:25,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:13:25,458 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) [2022-07-12 11:13:25,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 11:13:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:13:25,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 2490 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 11:13:25,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:13:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-12 11:13:25,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:13:25,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:13:25,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824950722] [2022-07-12 11:13:25,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:13:25,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985420355] [2022-07-12 11:13:25,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985420355] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:13:25,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:13:25,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 11:13:25,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655896365] [2022-07-12 11:13:25,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:13:25,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 11:13:25,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:13:25,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 11:13:25,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 11:13:25,862 INFO L87 Difference]: Start difference. First operand 147 states and 189 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-07-12 11:13:25,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:13:25,875 INFO L93 Difference]: Finished difference Result 268 states and 342 transitions. [2022-07-12 11:13:25,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 11:13:25,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 145 [2022-07-12 11:13:25,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:13:25,876 INFO L225 Difference]: With dead ends: 268 [2022-07-12 11:13:25,876 INFO L226 Difference]: Without dead ends: 149 [2022-07-12 11:13:25,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 11:13:25,877 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 1 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 11:13:25,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 356 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 11:13:25,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-12 11:13:25,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2022-07-12 11:13:25,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 95 states have (on average 1.168421052631579) internal successors, (111), 97 states have internal predecessors, (111), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-12 11:13:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 190 transitions. [2022-07-12 11:13:25,884 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 190 transitions. Word has length 145 [2022-07-12 11:13:25,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:13:25,885 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 190 transitions. [2022-07-12 11:13:25,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-07-12 11:13:25,885 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 190 transitions. [2022-07-12 11:13:25,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-12 11:13:25,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:13:25,886 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 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] [2022-07-12 11:13:25,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 11:13:26,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-12 11:13:26,091 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:13:26,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:13:26,091 INFO L85 PathProgramCache]: Analyzing trace with hash -626640314, now seen corresponding path program 1 times [2022-07-12 11:13:26,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:13:26,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126913254] [2022-07-12 11:13:26,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:26,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:13:26,139 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:13:26,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133508530] [2022-07-12 11:13:26,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:26,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:26,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:13:26,141 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) [2022-07-12 11:13:26,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 11:13:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:13:26,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 2509 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 11:13:26,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:13:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 198 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-12 11:13:26,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:13:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-12 11:13:26,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:13:26,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126913254] [2022-07-12 11:13:26,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:13:26,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133508530] [2022-07-12 11:13:26,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133508530] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 11:13:26,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 11:13:26,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-07-12 11:13:26,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300348865] [2022-07-12 11:13:26,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 11:13:26,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 11:13:26,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:13:26,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 11:13:26,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-12 11:13:26,864 INFO L87 Difference]: Start difference. First operand 148 states and 190 transitions. Second operand has 13 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 13 states have internal predecessors, (74), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-12 11:13:26,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:13:26,978 INFO L93 Difference]: Finished difference Result 270 states and 344 transitions. [2022-07-12 11:13:26,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 11:13:26,978 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 13 states have internal predecessors, (74), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) Word has length 147 [2022-07-12 11:13:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:13:26,979 INFO L225 Difference]: With dead ends: 270 [2022-07-12 11:13:26,980 INFO L226 Difference]: Without dead ends: 151 [2022-07-12 11:13:26,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-07-12 11:13:26,981 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 27 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 11:13:26,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1208 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 11:13:26,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-12 11:13:26,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-07-12 11:13:26,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 99 states have internal predecessors, (113), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-12 11:13:26,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 192 transitions. [2022-07-12 11:13:26,987 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 192 transitions. Word has length 147 [2022-07-12 11:13:26,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:13:26,987 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 192 transitions. [2022-07-12 11:13:26,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 13 states have internal predecessors, (74), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-12 11:13:26,988 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 192 transitions. [2022-07-12 11:13:26,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-12 11:13:26,989 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:13:26,989 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:13:27,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 11:13:27,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:27,199 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:13:27,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:13:27,200 INFO L85 PathProgramCache]: Analyzing trace with hash -2092653112, now seen corresponding path program 2 times [2022-07-12 11:13:27,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:13:27,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564382035] [2022-07-12 11:13:27,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:27,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:13:27,253 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:13:27,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367962687] [2022-07-12 11:13:27,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 11:13:27,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:27,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:13:27,256 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) [2022-07-12 11:13:27,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 11:13:27,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 11:13:27,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 11:13:27,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 2528 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 11:13:27,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:13:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 198 proven. 4 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-12 11:13:27,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:13:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-12 11:13:28,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:13:28,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564382035] [2022-07-12 11:13:28,156 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:13:28,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367962687] [2022-07-12 11:13:28,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367962687] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 11:13:28,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 11:13:28,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-07-12 11:13:28,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799402189] [2022-07-12 11:13:28,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 11:13:28,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 11:13:28,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:13:28,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 11:13:28,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-07-12 11:13:28,158 INFO L87 Difference]: Start difference. First operand 150 states and 192 transitions. Second operand has 15 states, 13 states have (on average 6.0) internal successors, (78), 15 states have internal predecessors, (78), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-12 11:13:28,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:13:28,278 INFO L93 Difference]: Finished difference Result 272 states and 346 transitions. [2022-07-12 11:13:28,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 11:13:28,279 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 6.0) internal successors, (78), 15 states have internal predecessors, (78), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) Word has length 149 [2022-07-12 11:13:28,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:13:28,280 INFO L225 Difference]: With dead ends: 272 [2022-07-12 11:13:28,280 INFO L226 Difference]: Without dead ends: 153 [2022-07-12 11:13:28,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 282 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-07-12 11:13:28,281 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 44 mSDsluCounter, 1374 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1550 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 11:13:28,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 1550 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 11:13:28,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-12 11:13:28,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2022-07-12 11:13:28,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 101 states have internal predecessors, (115), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-12 11:13:28,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 194 transitions. [2022-07-12 11:13:28,288 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 194 transitions. Word has length 149 [2022-07-12 11:13:28,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:13:28,288 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 194 transitions. [2022-07-12 11:13:28,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 6.0) internal successors, (78), 15 states have internal predecessors, (78), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-12 11:13:28,288 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 194 transitions. [2022-07-12 11:13:28,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-12 11:13:28,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:13:28,289 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 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] [2022-07-12 11:13:28,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 11:13:28,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-12 11:13:28,509 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:13:28,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:13:28,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2113288394, now seen corresponding path program 3 times [2022-07-12 11:13:28,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:13:28,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333635154] [2022-07-12 11:13:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:28,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:13:28,547 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:13:28,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8181326] [2022-07-12 11:13:28,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 11:13:28,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:28,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:13:28,549 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) [2022-07-12 11:13:28,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 11:13:31,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-12 11:13:31,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 11:13:31,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 2448 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 11:13:31,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:13:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 198 proven. 9 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-12 11:13:32,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:13:32,374 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-12 11:13:32,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:13:32,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333635154] [2022-07-12 11:13:32,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:13:32,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8181326] [2022-07-12 11:13:32,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8181326] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 11:13:32,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 11:13:32,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-07-12 11:13:32,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167510640] [2022-07-12 11:13:32,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 11:13:32,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 11:13:32,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:13:32,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 11:13:32,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-07-12 11:13:32,377 INFO L87 Difference]: Start difference. First operand 152 states and 194 transitions. Second operand has 17 states, 15 states have (on average 5.466666666666667) internal successors, (82), 17 states have internal predecessors, (82), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-12 11:13:32,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:13:32,540 INFO L93 Difference]: Finished difference Result 274 states and 348 transitions. [2022-07-12 11:13:32,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 11:13:32,543 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 5.466666666666667) internal successors, (82), 17 states have internal predecessors, (82), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) Word has length 151 [2022-07-12 11:13:32,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:13:32,545 INFO L225 Difference]: With dead ends: 274 [2022-07-12 11:13:32,545 INFO L226 Difference]: Without dead ends: 155 [2022-07-12 11:13:32,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-07-12 11:13:32,546 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 33 mSDsluCounter, 1718 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 11:13:32,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1894 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 11:13:32,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-12 11:13:32,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-07-12 11:13:32,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 103 states have internal predecessors, (117), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-12 11:13:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 196 transitions. [2022-07-12 11:13:32,553 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 196 transitions. Word has length 151 [2022-07-12 11:13:32,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:13:32,553 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 196 transitions. [2022-07-12 11:13:32,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 5.466666666666667) internal successors, (82), 17 states have internal predecessors, (82), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-12 11:13:32,553 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 196 transitions. [2022-07-12 11:13:32,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-07-12 11:13:32,554 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:13:32,554 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 4, 4, 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] [2022-07-12 11:13:32,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 11:13:32,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-12 11:13:32,763 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:13:32,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:13:32,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1836117172, now seen corresponding path program 4 times [2022-07-12 11:13:32,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:13:32,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166569049] [2022-07-12 11:13:32,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:32,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:13:32,827 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:13:32,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [425982805] [2022-07-12 11:13:32,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 11:13:32,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:32,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:13:32,828 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) [2022-07-12 11:13:32,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 11:13:33,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 11:13:33,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 11:13:33,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 2566 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 11:13:33,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:13:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 198 proven. 16 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-12 11:13:33,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:13:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-12 11:13:33,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:13:33,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166569049] [2022-07-12 11:13:33,793 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:13:33,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425982805] [2022-07-12 11:13:33,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425982805] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 11:13:33,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 11:13:33,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-07-12 11:13:33,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92653820] [2022-07-12 11:13:33,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 11:13:33,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 11:13:33,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:13:33,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 11:13:33,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-07-12 11:13:33,795 INFO L87 Difference]: Start difference. First operand 154 states and 196 transitions. Second operand has 19 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 19 states have internal predecessors, (86), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-12 11:13:33,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:13:33,977 INFO L93 Difference]: Finished difference Result 276 states and 350 transitions. [2022-07-12 11:13:33,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 11:13:33,988 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 19 states have internal predecessors, (86), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) Word has length 153 [2022-07-12 11:13:33,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:13:33,989 INFO L225 Difference]: With dead ends: 276 [2022-07-12 11:13:33,989 INFO L226 Difference]: Without dead ends: 157 [2022-07-12 11:13:33,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-07-12 11:13:33,990 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 33 mSDsluCounter, 2064 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 11:13:33,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 2240 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 11:13:33,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-07-12 11:13:34,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2022-07-12 11:13:34,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 103 states have (on average 1.1553398058252426) internal successors, (119), 105 states have internal predecessors, (119), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-12 11:13:34,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 198 transitions. [2022-07-12 11:13:34,025 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 198 transitions. Word has length 153 [2022-07-12 11:13:34,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:13:34,025 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 198 transitions. [2022-07-12 11:13:34,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 19 states have internal predecessors, (86), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-12 11:13:34,025 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 198 transitions. [2022-07-12 11:13:34,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-07-12 11:13:34,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:13:34,026 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 5, 5, 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] [2022-07-12 11:13:34,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 11:13:34,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-12 11:13:34,227 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:13:34,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:13:34,227 INFO L85 PathProgramCache]: Analyzing trace with hash -463776434, now seen corresponding path program 5 times [2022-07-12 11:13:34,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:13:34,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509128387] [2022-07-12 11:13:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:34,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:13:34,269 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:13:34,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238851454] [2022-07-12 11:13:34,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 11:13:34,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:34,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:13:34,271 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) [2022-07-12 11:13:34,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 11:13:35,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-12 11:13:35,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 11:13:35,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 11:13:35,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:13:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 198 proven. 25 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-12 11:13:35,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:13:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-12 11:13:35,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:13:35,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509128387] [2022-07-12 11:13:35,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:13:35,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238851454] [2022-07-12 11:13:35,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238851454] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 11:13:35,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 11:13:35,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-07-12 11:13:35,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76658013] [2022-07-12 11:13:35,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 11:13:35,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 11:13:35,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:13:35,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 11:13:35,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-07-12 11:13:35,957 INFO L87 Difference]: Start difference. First operand 156 states and 198 transitions. Second operand has 25 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 25 states have internal predecessors, (90), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-12 11:13:36,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:13:36,366 INFO L93 Difference]: Finished difference Result 278 states and 352 transitions. [2022-07-12 11:13:36,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 11:13:36,368 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 25 states have internal predecessors, (90), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) Word has length 155 [2022-07-12 11:13:36,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:13:36,369 INFO L225 Difference]: With dead ends: 278 [2022-07-12 11:13:36,369 INFO L226 Difference]: Without dead ends: 159 [2022-07-12 11:13:36,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-07-12 11:13:36,370 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 41 mSDsluCounter, 2406 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 2582 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 11:13:36,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 2582 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 11:13:36,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-12 11:13:36,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2022-07-12 11:13:36,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 107 states have internal predecessors, (121), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-12 11:13:36,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 200 transitions. [2022-07-12 11:13:36,375 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 200 transitions. Word has length 155 [2022-07-12 11:13:36,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:13:36,376 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 200 transitions. [2022-07-12 11:13:36,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 25 states have internal predecessors, (90), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-12 11:13:36,376 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 200 transitions. [2022-07-12 11:13:36,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-12 11:13:36,377 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:13:36,377 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 6, 6, 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] [2022-07-12 11:13:36,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 11:13:36,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-12 11:13:36,584 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:13:36,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:13:36,584 INFO L85 PathProgramCache]: Analyzing trace with hash -199287088, now seen corresponding path program 6 times [2022-07-12 11:13:36,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:13:36,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301211017] [2022-07-12 11:13:36,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:13:36,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:13:36,627 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:13:36,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036034837] [2022-07-12 11:13:36,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 11:13:36,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:13:36,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:13:36,628 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) [2022-07-12 11:13:36,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 11:14:33,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-12 11:14:33,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 11:14:34,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 2512 conjuncts, 161 conjunts are in the unsatisfiable core [2022-07-12 11:14:34,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:14:34,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 11:14:34,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 11:14:34,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 11:14:34,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2022-07-12 11:14:34,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-07-12 11:14:34,400 INFO L390 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 [2022-07-12 11:14:59,107 WARN L233 SmtUtils]: Spent 7.22s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 11:15:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 57 proven. 27 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-07-12 11:15:00,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:15:38,569 WARN L233 SmtUtils]: Spent 24.56s on a formula simplification. DAG size of input: 76 DAG size of output: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 11:15:38,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:15:38,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301211017] [2022-07-12 11:15:38,586 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:15:38,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036034837] [2022-07-12 11:15:38,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036034837] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 11:15:38,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 11:15:38,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-07-12 11:15:38,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115910993] [2022-07-12 11:15:38,587 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 11:15:38,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 11:15:38,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:15:38,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 11:15:38,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=918, Unknown=2, NotChecked=0, Total=992 [2022-07-12 11:15:38,589 INFO L87 Difference]: Start difference. First operand 158 states and 200 transitions. Second operand has 28 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 10 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-07-12 11:15:49,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:15:49,628 INFO L93 Difference]: Finished difference Result 383 states and 506 transitions. [2022-07-12 11:15:49,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-12 11:15:49,628 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 10 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 157 [2022-07-12 11:15:49,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:15:49,630 INFO L225 Difference]: With dead ends: 383 [2022-07-12 11:15:49,630 INFO L226 Difference]: Without dead ends: 381 [2022-07-12 11:15:49,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 65.1s TimeCoverageRelationStatistics Valid=304, Invalid=3353, Unknown=3, NotChecked=0, Total=3660 [2022-07-12 11:15:49,631 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 288 mSDsluCounter, 2976 mSDsCounter, 0 mSdLazyCounter, 2961 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 3214 SdHoareTripleChecker+Invalid, 5254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 2961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2030 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-12 11:15:49,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 3214 Invalid, 5254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 2961 Invalid, 0 Unknown, 2030 Unchecked, 2.1s Time] [2022-07-12 11:15:49,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-07-12 11:15:49,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 328. [2022-07-12 11:15:49,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 220 states have (on average 1.15) internal successors, (253), 224 states have internal predecessors, (253), 77 states have call successors, (77), 26 states have call predecessors, (77), 30 states have return successors, (94), 77 states have call predecessors, (94), 75 states have call successors, (94) [2022-07-12 11:15:49,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 424 transitions. [2022-07-12 11:15:49,646 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 424 transitions. Word has length 157 [2022-07-12 11:15:49,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:15:49,646 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 424 transitions. [2022-07-12 11:15:49,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 10 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-07-12 11:15:49,646 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 424 transitions. [2022-07-12 11:15:49,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-12 11:15:49,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:15:49,648 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 6, 6, 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] [2022-07-12 11:15:49,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 11:15:49,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:15:49,863 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:15:49,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:15:49,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1137510896, now seen corresponding path program 1 times [2022-07-12 11:15:49,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:15:49,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483916101] [2022-07-12 11:15:49,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:15:49,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:15:49,934 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:15:49,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343781054] [2022-07-12 11:15:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:15:49,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:15:49,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:15:49,936 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) [2022-07-12 11:15:49,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 11:15:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:15:50,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 2604 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 11:15:50,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:15:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 198 proven. 36 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-12 11:15:50,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:15:51,224 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-12 11:15:51,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:15:51,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483916101] [2022-07-12 11:15:51,224 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:15:51,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343781054] [2022-07-12 11:15:51,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343781054] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 11:15:51,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 11:15:51,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2022-07-12 11:15:51,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012355608] [2022-07-12 11:15:51,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 11:15:51,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 11:15:51,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:15:51,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 11:15:51,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-07-12 11:15:51,226 INFO L87 Difference]: Start difference. First operand 328 states and 424 transitions. Second operand has 23 states, 21 states have (on average 4.476190476190476) internal successors, (94), 23 states have internal predecessors, (94), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-12 11:15:51,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:15:51,504 INFO L93 Difference]: Finished difference Result 589 states and 763 transitions. [2022-07-12 11:15:51,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 11:15:51,506 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 4.476190476190476) internal successors, (94), 23 states have internal predecessors, (94), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) Word has length 157 [2022-07-12 11:15:51,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:15:51,507 INFO L225 Difference]: With dead ends: 589 [2022-07-12 11:15:51,508 INFO L226 Difference]: Without dead ends: 334 [2022-07-12 11:15:51,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2022-07-12 11:15:51,509 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 41 mSDsluCounter, 2070 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 2246 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 11:15:51,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 2246 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 11:15:51,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-07-12 11:15:51,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 332. [2022-07-12 11:15:51,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 224 states have (on average 1.1473214285714286) internal successors, (257), 228 states have internal predecessors, (257), 77 states have call successors, (77), 26 states have call predecessors, (77), 30 states have return successors, (94), 77 states have call predecessors, (94), 75 states have call successors, (94) [2022-07-12 11:15:51,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 428 transitions. [2022-07-12 11:15:51,523 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 428 transitions. Word has length 157 [2022-07-12 11:15:51,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:15:51,523 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 428 transitions. [2022-07-12 11:15:51,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 4.476190476190476) internal successors, (94), 23 states have internal predecessors, (94), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-12 11:15:51,523 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 428 transitions. [2022-07-12 11:15:51,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-12 11:15:51,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:15:51,524 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 7, 7, 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] [2022-07-12 11:15:51,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 11:15:51,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-12 11:15:51,732 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:15:51,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:15:51,732 INFO L85 PathProgramCache]: Analyzing trace with hash -366319854, now seen corresponding path program 2 times [2022-07-12 11:15:51,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:15:51,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873968503] [2022-07-12 11:15:51,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:15:51,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:15:51,774 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:15:51,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341968748] [2022-07-12 11:15:51,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 11:15:51,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:15:51,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:15:51,776 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) [2022-07-12 11:15:51,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 11:15:52,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 11:15:52,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 11:15:52,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 2623 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 11:15:52,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:15:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 198 proven. 49 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-12 11:15:52,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:15:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-12 11:15:53,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:15:53,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873968503] [2022-07-12 11:15:53,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:15:53,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341968748] [2022-07-12 11:15:53,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341968748] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 11:15:53,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 11:15:53,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2022-07-12 11:15:53,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544392405] [2022-07-12 11:15:53,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 11:15:53,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 11:15:53,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:15:53,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 11:15:53,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-07-12 11:15:53,612 INFO L87 Difference]: Start difference. First operand 332 states and 428 transitions. Second operand has 27 states, 25 states have (on average 3.92) internal successors, (98), 27 states have internal predecessors, (98), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-12 11:15:54,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:15:54,333 INFO L93 Difference]: Finished difference Result 593 states and 767 transitions. [2022-07-12 11:15:54,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 11:15:54,334 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.92) internal successors, (98), 27 states have internal predecessors, (98), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) Word has length 159 [2022-07-12 11:15:54,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:15:54,335 INFO L225 Difference]: With dead ends: 593 [2022-07-12 11:15:54,335 INFO L226 Difference]: Without dead ends: 338 [2022-07-12 11:15:54,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 11:15:54,337 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 58 mSDsluCounter, 3096 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 3272 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 11:15:54,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 3272 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 11:15:54,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-07-12 11:15:54,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 336. [2022-07-12 11:15:54,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 228 states have (on average 1.144736842105263) internal successors, (261), 232 states have internal predecessors, (261), 77 states have call successors, (77), 26 states have call predecessors, (77), 30 states have return successors, (94), 77 states have call predecessors, (94), 75 states have call successors, (94) [2022-07-12 11:15:54,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 432 transitions. [2022-07-12 11:15:54,351 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 432 transitions. Word has length 159 [2022-07-12 11:15:54,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:15:54,352 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 432 transitions. [2022-07-12 11:15:54,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.92) internal successors, (98), 27 states have internal predecessors, (98), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-12 11:15:54,352 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 432 transitions. [2022-07-12 11:15:54,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-12 11:15:54,353 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:15:54,353 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 8, 8, 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] [2022-07-12 11:15:54,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 11:15:54,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-12 11:15:54,567 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:15:54,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:15:54,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2013896596, now seen corresponding path program 3 times [2022-07-12 11:15:54,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:15:54,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095645347] [2022-07-12 11:15:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:15:54,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:15:54,617 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:15:54,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111420539] [2022-07-12 11:15:54,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 11:15:54,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:15:54,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:15:54,619 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) [2022-07-12 11:15:54,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 11:15:55,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 11:15:55,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 11:15:55,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 2108 conjuncts, 111 conjunts are in the unsatisfiable core [2022-07-12 11:15:55,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:15:55,947 INFO L390 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 [2022-07-12 11:15:56,052 INFO L356 Elim1Store]: treesize reduction 84, result has 21.5 percent of original size [2022-07-12 11:15:56,052 INFO L390 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 2 case distinctions, treesize of input 27 treesize of output 32 [2022-07-12 11:16:13,371 WARN L233 SmtUtils]: Spent 6.87s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 11:16:13,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 11:16:14,369 INFO L356 Elim1Store]: treesize reduction 627, result has 20.5 percent of original size [2022-07-12 11:16:14,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 34 case distinctions, treesize of input 255 treesize of output 432 [2022-07-12 11:16:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-07-12 11:16:14,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:16:14,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:16:14,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095645347] [2022-07-12 11:16:14,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:16:14,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111420539] [2022-07-12 11:16:14,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111420539] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:16:14,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:16:14,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-07-12 11:16:14,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208962290] [2022-07-12 11:16:14,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:16:14,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 11:16:14,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:16:14,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 11:16:14,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=538, Unknown=3, NotChecked=0, Total=600 [2022-07-12 11:16:14,609 INFO L87 Difference]: Start difference. First operand 336 states and 432 transitions. Second operand has 25 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 7 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-07-12 11:16:16,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:16:16,283 INFO L93 Difference]: Finished difference Result 506 states and 705 transitions. [2022-07-12 11:16:16,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 11:16:16,284 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 7 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 161 [2022-07-12 11:16:16,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:16:16,286 INFO L225 Difference]: With dead ends: 506 [2022-07-12 11:16:16,286 INFO L226 Difference]: Without dead ends: 504 [2022-07-12 11:16:16,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=104, Invalid=1015, Unknown=3, NotChecked=0, Total=1122 [2022-07-12 11:16:16,287 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 141 mSDsluCounter, 2199 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 2416 SdHoareTripleChecker+Invalid, 3015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 942 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-12 11:16:16,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 2416 Invalid, 3015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1961 Invalid, 0 Unknown, 942 Unchecked, 1.5s Time] [2022-07-12 11:16:16,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-07-12 11:16:16,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 337. [2022-07-12 11:16:16,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 229 states have (on average 1.148471615720524) internal successors, (263), 233 states have internal predecessors, (263), 77 states have call successors, (77), 26 states have call predecessors, (77), 30 states have return successors, (94), 77 states have call predecessors, (94), 75 states have call successors, (94) [2022-07-12 11:16:16,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 434 transitions. [2022-07-12 11:16:16,305 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 434 transitions. Word has length 161 [2022-07-12 11:16:16,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:16:16,306 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 434 transitions. [2022-07-12 11:16:16,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 7 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-07-12 11:16:16,306 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 434 transitions. [2022-07-12 11:16:16,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-12 11:16:16,307 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:16:16,307 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 8, 8, 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] [2022-07-12 11:16:16,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 11:16:16,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 11:16:16,519 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:16:16,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:16:16,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1601012330, now seen corresponding path program 1 times [2022-07-12 11:16:16,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:16:16,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915850431] [2022-07-12 11:16:16,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:16:16,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:16:16,557 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:16:16,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315832487] [2022-07-12 11:16:16,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:16:16,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:16:16,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:16:16,559 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) [2022-07-12 11:16:16,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 11:16:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:16:17,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 2647 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 11:16:17,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:16:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2022-07-12 11:16:17,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:16:17,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:16:17,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915850431] [2022-07-12 11:16:17,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:16:17,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315832487] [2022-07-12 11:16:17,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315832487] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:16:17,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 11:16:17,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 11:16:17,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722230629] [2022-07-12 11:16:17,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:16:17,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 11:16:17,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:16:17,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 11:16:17,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 11:16:17,092 INFO L87 Difference]: Start difference. First operand 337 states and 434 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2022-07-12 11:16:17,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:16:17,248 INFO L93 Difference]: Finished difference Result 557 states and 735 transitions. [2022-07-12 11:16:17,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 11:16:17,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) Word has length 161 [2022-07-12 11:16:17,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:16:17,250 INFO L225 Difference]: With dead ends: 557 [2022-07-12 11:16:17,250 INFO L226 Difference]: Without dead ends: 349 [2022-07-12 11:16:17,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 11:16:17,251 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 13 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 11:16:17,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 664 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 11:16:17,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-07-12 11:16:17,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 337. [2022-07-12 11:16:17,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 229 states have (on average 1.1397379912663756) internal successors, (261), 233 states have internal predecessors, (261), 77 states have call successors, (77), 26 states have call predecessors, (77), 30 states have return successors, (94), 77 states have call predecessors, (94), 75 states have call successors, (94) [2022-07-12 11:16:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 432 transitions. [2022-07-12 11:16:17,268 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 432 transitions. Word has length 161 [2022-07-12 11:16:17,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:16:17,269 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 432 transitions. [2022-07-12 11:16:17,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2022-07-12 11:16:17,269 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 432 transitions. [2022-07-12 11:16:17,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-07-12 11:16:17,270 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:16:17,270 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:16:17,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 11:16:17,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 11:16:17,475 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:16:17,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:16:17,476 INFO L85 PathProgramCache]: Analyzing trace with hash 709060506, now seen corresponding path program 1 times [2022-07-12 11:16:17,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:16:17,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034796616] [2022-07-12 11:16:17,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:16:17,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:16:17,515 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:16:17,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757254688] [2022-07-12 11:16:17,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:16:17,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:16:17,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:16:17,520 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) [2022-07-12 11:16:17,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 11:16:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:16:18,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 2646 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 11:16:18,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:16:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 198 proven. 64 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-12 11:16:18,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:16:19,050 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-12 11:16:19,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:16:19,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034796616] [2022-07-12 11:16:19,050 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:16:19,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757254688] [2022-07-12 11:16:19,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757254688] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 11:16:19,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 11:16:19,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2022-07-12 11:16:19,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79384882] [2022-07-12 11:16:19,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 11:16:19,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 11:16:19,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:16:19,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 11:16:19,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-07-12 11:16:19,052 INFO L87 Difference]: Start difference. First operand 337 states and 432 transitions. Second operand has 27 states, 25 states have (on average 4.48) internal successors, (112), 27 states have internal predecessors, (112), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2022-07-12 11:16:19,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:16:19,394 INFO L93 Difference]: Finished difference Result 599 states and 771 transitions. [2022-07-12 11:16:19,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 11:16:19,395 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 4.48) internal successors, (112), 27 states have internal predecessors, (112), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 167 [2022-07-12 11:16:19,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:16:19,396 INFO L225 Difference]: With dead ends: 599 [2022-07-12 11:16:19,396 INFO L226 Difference]: Without dead ends: 343 [2022-07-12 11:16:19,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 306 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2022-07-12 11:16:19,398 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 66 mSDsluCounter, 2080 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 2256 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 11:16:19,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 2256 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 11:16:19,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-07-12 11:16:19,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 341. [2022-07-12 11:16:19,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 233 states have (on average 1.1373390557939915) internal successors, (265), 237 states have internal predecessors, (265), 77 states have call successors, (77), 26 states have call predecessors, (77), 30 states have return successors, (94), 77 states have call predecessors, (94), 75 states have call successors, (94) [2022-07-12 11:16:19,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 436 transitions. [2022-07-12 11:16:19,413 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 436 transitions. Word has length 167 [2022-07-12 11:16:19,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:16:19,413 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 436 transitions. [2022-07-12 11:16:19,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 4.48) internal successors, (112), 27 states have internal predecessors, (112), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2022-07-12 11:16:19,414 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 436 transitions. [2022-07-12 11:16:19,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-12 11:16:19,414 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:16:19,415 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 9, 9, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:16:19,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 11:16:19,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:16:19,623 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:16:19,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:16:19,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1406468580, now seen corresponding path program 2 times [2022-07-12 11:16:19,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:16:19,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414211034] [2022-07-12 11:16:19,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:16:19,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:16:19,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:16:19,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156409508] [2022-07-12 11:16:19,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 11:16:19,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:16:19,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:16:19,662 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) [2022-07-12 11:16:19,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 11:16:20,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 11:16:20,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 11:16:20,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 2665 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 11:16:20,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:16:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 198 proven. 81 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-12 11:16:20,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:16:21,833 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-12 11:16:21,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:16:21,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414211034] [2022-07-12 11:16:21,833 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 11:16:21,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156409508] [2022-07-12 11:16:21,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156409508] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 11:16:21,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 11:16:21,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2022-07-12 11:16:21,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338661656] [2022-07-12 11:16:21,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 11:16:21,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-12 11:16:21,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:16:21,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-12 11:16:21,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-07-12 11:16:21,835 INFO L87 Difference]: Start difference. First operand 341 states and 436 transitions. Second operand has 31 states, 29 states have (on average 4.0) internal successors, (116), 31 states have internal predecessors, (116), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2022-07-12 11:16:22,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:16:22,440 INFO L93 Difference]: Finished difference Result 603 states and 775 transitions. [2022-07-12 11:16:22,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 11:16:22,441 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 4.0) internal successors, (116), 31 states have internal predecessors, (116), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 169 [2022-07-12 11:16:22,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:16:22,444 INFO L225 Difference]: With dead ends: 603 [2022-07-12 11:16:22,444 INFO L226 Difference]: Without dead ends: 347 [2022-07-12 11:16:22,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 306 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 11:16:22,447 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 62 mSDsluCounter, 3272 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 3448 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 11:16:22,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 3448 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 11:16:22,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-07-12 11:16:22,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 345. [2022-07-12 11:16:22,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 237 states have (on average 1.1350210970464134) internal successors, (269), 241 states have internal predecessors, (269), 77 states have call successors, (77), 26 states have call predecessors, (77), 30 states have return successors, (94), 77 states have call predecessors, (94), 75 states have call successors, (94) [2022-07-12 11:16:22,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 440 transitions. [2022-07-12 11:16:22,466 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 440 transitions. Word has length 169 [2022-07-12 11:16:22,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:16:22,466 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 440 transitions. [2022-07-12 11:16:22,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 4.0) internal successors, (116), 31 states have internal predecessors, (116), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2022-07-12 11:16:22,467 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 440 transitions. [2022-07-12 11:16:22,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-07-12 11:16:22,468 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:16:22,468 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 10, 10, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:16:22,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 11:16:22,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:16:22,679 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:16:22,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:16:22,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1384578078, now seen corresponding path program 3 times [2022-07-12 11:16:22,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:16:22,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552107870] [2022-07-12 11:16:22,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:16:22,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:16:22,719 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 11:16:22,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025827469] [2022-07-12 11:16:22,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 11:16:22,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:16:22,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:16:22,721 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) [2022-07-12 11:16:22,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process