./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness-1.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 f4db5fb03820aea666082345ea177387bf1c218ce33dad19402cb646ed5abf58 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 21:38:07,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 21:38:07,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 21:38:07,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 21:38:07,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 21:38:07,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 21:38:07,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 21:38:07,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 21:38:07,972 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 21:38:07,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 21:38:07,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 21:38:07,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 21:38:07,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 21:38:07,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 21:38:07,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 21:38:07,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 21:38:07,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 21:38:07,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 21:38:07,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 21:38:07,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 21:38:07,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 21:38:07,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 21:38:07,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 21:38:07,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 21:38:07,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 21:38:08,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 21:38:08,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 21:38:08,003 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 21:38:08,003 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 21:38:08,004 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 21:38:08,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 21:38:08,005 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 21:38:08,006 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 21:38:08,007 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 21:38:08,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 21:38:08,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 21:38:08,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 21:38:08,009 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 21:38:08,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 21:38:08,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 21:38:08,011 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 21:38:08,012 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-16 21:38:08,048 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 21:38:08,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 21:38:08,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 21:38:08,050 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 21:38:08,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 21:38:08,051 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 21:38:08,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 21:38:08,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 21:38:08,052 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 21:38:08,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 21:38:08,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-16 21:38:08,054 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 21:38:08,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 21:38:08,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 21:38:08,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 21:38:08,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 21:38:08,055 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 21:38:08,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 21:38:08,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 21:38:08,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 21:38:08,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 21:38:08,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 21:38:08,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 21:38:08,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 21:38:08,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 21:38:08,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-16 21:38:08,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-16 21:38:08,057 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 21:38:08,057 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 21:38:08,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 21:38:08,058 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 21:38:08,058 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4db5fb03820aea666082345ea177387bf1c218ce33dad19402cb646ed5abf58 [2021-11-16 21:38:08,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 21:38:08,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 21:38:08,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 21:38:08,322 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 21:38:08,322 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 21:38:08,323 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i [2021-11-16 21:38:08,371 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ae31af40/1dbb457863014847aada93ed43c5d8fb/FLAGcf19313ab [2021-11-16 21:38:09,052 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 21:38:09,053 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i [2021-11-16 21:38:09,098 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ae31af40/1dbb457863014847aada93ed43c5d8fb/FLAGcf19313ab [2021-11-16 21:38:09,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ae31af40/1dbb457863014847aada93ed43c5d8fb [2021-11-16 21:38:09,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 21:38:09,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 21:38:09,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 21:38:09,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 21:38:09,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 21:38:09,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 09:38:09" (1/1) ... [2021-11-16 21:38:09,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3050b679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:38:09, skipping insertion in model container [2021-11-16 21:38:09,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 09:38:09" (1/1) ... [2021-11-16 21:38:09,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 21:38:09,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 21:38:09,734 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_dynamic_harness-1.i[4505,4518] [2021-11-16 21:38:09,741 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_dynamic_harness-1.i[4565,4578] [2021-11-16 21:38:09,761 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 21:38:09,767 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 21:38:10,274 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 21:38:10,321 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:38:10,322 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:38:10,323 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:38:10,323 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:38:10,324 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:38:10,335 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:38:10,336 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:38:10,337 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:38:10,338 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:38:10,546 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 21:38:10,547 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 21:38:10,548 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 21:38:10,549 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 21:38:10,550 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 21:38:10,551 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 21:38:10,551 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 21:38:10,552 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 21:38:10,552 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 21:38:10,553 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 21:38:10,659 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:38:10,659 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:38:10,712 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 21:38:10,740 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 21:38:10,761 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_dynamic_harness-1.i[4505,4518] [2021-11-16 21:38:10,762 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_dynamic_harness-1.i[4565,4578] [2021-11-16 21:38:10,764 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 21:38:10,765 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 21:38:10,810 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 21:38:10,822 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:38:10,822 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:38:10,823 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:38:10,823 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:38:10,824 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:38:10,829 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:38:10,829 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:38:10,830 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:38:10,830 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:38:10,852 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 21:38:10,853 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 21:38:10,854 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 21:38:10,854 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 21:38:10,855 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 21:38:10,856 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 21:38:10,856 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 21:38:10,856 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 21:38:10,857 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 21:38:10,857 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 21:38:10,894 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:38:10,895 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:38:10,926 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 21:38:11,117 INFO L208 MainTranslator]: Completed translation [2021-11-16 21:38:11,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:38:11 WrapperNode [2021-11-16 21:38:11,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 21:38:11,118 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 21:38:11,118 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 21:38:11,119 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 21:38:11,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:38:11" (1/1) ... [2021-11-16 21:38:11,215 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:38:11" (1/1) ... [2021-11-16 21:38:11,289 INFO L137 Inliner]: procedures = 691, calls = 1519, calls flagged for inlining = 52, calls inlined = 9, statements flattened = 739 [2021-11-16 21:38:11,290 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 21:38:11,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 21:38:11,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 21:38:11,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 21:38:11,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:38:11" (1/1) ... [2021-11-16 21:38:11,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:38:11" (1/1) ... [2021-11-16 21:38:11,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:38:11" (1/1) ... [2021-11-16 21:38:11,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:38:11" (1/1) ... [2021-11-16 21:38:11,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:38:11" (1/1) ... [2021-11-16 21:38:11,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:38:11" (1/1) ... [2021-11-16 21:38:11,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:38:11" (1/1) ... [2021-11-16 21:38:11,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 21:38:11,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 21:38:11,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 21:38:11,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 21:38:11,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:38:11" (1/1) ... [2021-11-16 21:38:11,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 21:38:11,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:11,432 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-16 21:38:11,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-16 21:38:11,470 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-11-16 21:38:11,470 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-11-16 21:38:11,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 21:38:11,471 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-11-16 21:38:11,471 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-11-16 21:38:11,471 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-16 21:38:11,472 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-16 21:38:11,473 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2021-11-16 21:38:11,473 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2021-11-16 21:38:11,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-16 21:38:11,474 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-16 21:38:11,474 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-16 21:38:11,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-16 21:38:11,474 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-16 21:38:11,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-16 21:38:11,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 21:38:11,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-16 21:38:11,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 21:38:11,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 21:38:11,475 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-16 21:38:11,475 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-16 21:38:11,475 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_size_t [2021-11-16 21:38:11,476 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_size_t [2021-11-16 21:38:11,476 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-16 21:38:11,476 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-16 21:38:11,476 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-11-16 21:38:11,476 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-11-16 21:38:11,477 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2021-11-16 21:38:11,477 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2021-11-16 21:38:11,477 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-16 21:38:11,477 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-16 21:38:11,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 21:38:11,477 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_umull_overflow [2021-11-16 21:38:11,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-16 21:38:11,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 21:38:11,478 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-16 21:38:11,478 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-16 21:38:11,478 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-16 21:38:11,478 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-16 21:38:11,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-16 21:38:11,479 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-11-16 21:38:11,479 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-11-16 21:38:11,479 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-11-16 21:38:11,479 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-11-16 21:38:11,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-16 21:38:11,702 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 21:38:11,704 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 21:38:13,026 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 21:38:13,037 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 21:38:13,038 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-16 21:38:13,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 09:38:13 BoogieIcfgContainer [2021-11-16 21:38:13,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 21:38:13,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 21:38:13,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 21:38:13,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 21:38:13,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 09:38:09" (1/3) ... [2021-11-16 21:38:13,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59762b6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 09:38:13, skipping insertion in model container [2021-11-16 21:38:13,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:38:11" (2/3) ... [2021-11-16 21:38:13,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59762b6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 09:38:13, skipping insertion in model container [2021-11-16 21:38:13,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 09:38:13" (3/3) ... [2021-11-16 21:38:13,049 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_init_dynamic_harness-1.i [2021-11-16 21:38:13,053 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 21:38:13,053 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 21:38:13,107 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 21:38:13,112 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-16 21:38:13,113 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 21:38:13,136 INFO L276 IsEmpty]: Start isEmpty. Operand has 205 states, 133 states have (on average 1.255639097744361) internal successors, (167), 133 states have internal predecessors, (167), 56 states have call successors, (56), 16 states have call predecessors, (56), 16 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2021-11-16 21:38:13,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-16 21:38:13,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:13,153 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:38:13,153 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:13,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:13,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1293047729, now seen corresponding path program 1 times [2021-11-16 21:38:13,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:13,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437953646] [2021-11-16 21:38:13,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:13,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:13,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:38:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:13,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:38:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:13,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:38:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:13,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-16 21:38:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:13,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-16 21:38:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:13,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 21:38:13,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:13,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437953646] [2021-11-16 21:38:13,726 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-16 21:38:13,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808724076] [2021-11-16 21:38:13,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:13,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:13,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:13,735 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:38:13,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-16 21:38:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:14,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-16 21:38:14,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-11-16 21:38:14,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:38:14,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808724076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:38:14,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:38:14,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-16 21:38:14,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47311647] [2021-11-16 21:38:14,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:38:14,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-16 21:38:14,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:14,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-16 21:38:14,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 21:38:14,446 INFO L87 Difference]: Start difference. First operand has 205 states, 133 states have (on average 1.255639097744361) internal successors, (167), 133 states have internal predecessors, (167), 56 states have call successors, (56), 16 states have call predecessors, (56), 16 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-16 21:38:14,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:14,487 INFO L93 Difference]: Finished difference Result 401 states and 585 transitions. [2021-11-16 21:38:14,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-16 21:38:14,489 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 112 [2021-11-16 21:38:14,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:14,498 INFO L225 Difference]: With dead ends: 401 [2021-11-16 21:38:14,498 INFO L226 Difference]: Without dead ends: 198 [2021-11-16 21:38:14,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 21:38:14,505 INFO L933 BasicCegarLoop]: 271 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, 271 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:14,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:38:14,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-16 21:38:14,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-11-16 21:38:14,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 125 states have (on average 1.224) internal successors, (153), 127 states have internal predecessors, (153), 56 states have call successors, (56), 16 states have call predecessors, (56), 16 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2021-11-16 21:38:14,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 263 transitions. [2021-11-16 21:38:14,596 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 263 transitions. Word has length 112 [2021-11-16 21:38:14,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:14,597 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 263 transitions. [2021-11-16 21:38:14,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-16 21:38:14,598 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 263 transitions. [2021-11-16 21:38:14,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-16 21:38:14,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:14,601 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:38:14,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-16 21:38:14,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-16 21:38:14,821 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:14,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:14,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1403140028, now seen corresponding path program 1 times [2021-11-16 21:38:14,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:14,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438365030] [2021-11-16 21:38:14,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:14,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:14,874 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:14,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420921384] [2021-11-16 21:38:14,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:14,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:14,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:14,876 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:38:14,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-16 21:38:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:15,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 2308 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-16 21:38:15,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2021-11-16 21:38:15,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:38:15,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:15,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438365030] [2021-11-16 21:38:15,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:15,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420921384] [2021-11-16 21:38:15,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420921384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:38:15,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:38:15,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-16 21:38:15,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284568846] [2021-11-16 21:38:15,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:38:15,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 21:38:15,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:15,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 21:38:15,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-16 21:38:15,603 INFO L87 Difference]: Start difference. First operand 198 states and 263 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-16 21:38:15,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:15,665 INFO L93 Difference]: Finished difference Result 302 states and 404 transitions. [2021-11-16 21:38:15,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 21:38:15,676 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 146 [2021-11-16 21:38:15,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:15,681 INFO L225 Difference]: With dead ends: 302 [2021-11-16 21:38:15,681 INFO L226 Difference]: Without dead ends: 203 [2021-11-16 21:38:15,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-16 21:38:15,684 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 2 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:15,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1035 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:38:15,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-16 21:38:15,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2021-11-16 21:38:15,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 129 states have (on average 1.2170542635658914) internal successors, (157), 131 states have internal predecessors, (157), 56 states have call successors, (56), 16 states have call predecessors, (56), 17 states have return successors, (57), 55 states have call predecessors, (57), 54 states have call successors, (57) [2021-11-16 21:38:15,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 270 transitions. [2021-11-16 21:38:15,701 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 270 transitions. Word has length 146 [2021-11-16 21:38:15,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:15,702 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 270 transitions. [2021-11-16 21:38:15,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-16 21:38:15,702 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 270 transitions. [2021-11-16 21:38:15,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-16 21:38:15,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:15,704 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:38:15,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-16 21:38:15,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-16 21:38:15,932 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:15,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:15,932 INFO L85 PathProgramCache]: Analyzing trace with hash 494695836, now seen corresponding path program 1 times [2021-11-16 21:38:15,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:15,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287008955] [2021-11-16 21:38:15,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:15,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:15,972 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:15,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469137243] [2021-11-16 21:38:15,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:15,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:15,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:15,975 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:38:15,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-16 21:38:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:16,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 2305 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-16 21:38:16,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2021-11-16 21:38:16,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:38:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-11-16 21:38:17,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:17,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287008955] [2021-11-16 21:38:17,163 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:17,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469137243] [2021-11-16 21:38:17,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469137243] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 21:38:17,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:38:17,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2021-11-16 21:38:17,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411946790] [2021-11-16 21:38:17,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:38:17,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 21:38:17,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:17,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 21:38:17,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-16 21:38:17,166 INFO L87 Difference]: Start difference. First operand 203 states and 270 transitions. Second operand has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-16 21:38:17,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:17,223 INFO L93 Difference]: Finished difference Result 211 states and 278 transitions. [2021-11-16 21:38:17,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 21:38:17,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 147 [2021-11-16 21:38:17,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:17,231 INFO L225 Difference]: With dead ends: 211 [2021-11-16 21:38:17,231 INFO L226 Difference]: Without dead ends: 209 [2021-11-16 21:38:17,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-16 21:38:17,239 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 4 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:17,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1031 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:38:17,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-16 21:38:17,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2021-11-16 21:38:17,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 132 states have (on average 1.2121212121212122) internal successors, (160), 135 states have internal predecessors, (160), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2021-11-16 21:38:17,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 275 transitions. [2021-11-16 21:38:17,268 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 275 transitions. Word has length 147 [2021-11-16 21:38:17,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:17,268 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 275 transitions. [2021-11-16 21:38:17,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-16 21:38:17,269 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 275 transitions. [2021-11-16 21:38:17,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-16 21:38:17,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:17,277 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:38:17,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-16 21:38:17,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:17,503 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:17,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:17,504 INFO L85 PathProgramCache]: Analyzing trace with hash 496542878, now seen corresponding path program 1 times [2021-11-16 21:38:17,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:17,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301322185] [2021-11-16 21:38:17,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:17,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:17,571 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:17,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709223613] [2021-11-16 21:38:17,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:17,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:17,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:17,574 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:38:17,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-16 21:38:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:17,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 2310 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-16 21:38:17,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-16 21:38:18,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:38:18,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:18,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301322185] [2021-11-16 21:38:18,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:18,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709223613] [2021-11-16 21:38:18,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709223613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:38:18,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:38:18,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-16 21:38:18,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500251482] [2021-11-16 21:38:18,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:38:18,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 21:38:18,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:18,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 21:38:18,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-16 21:38:18,228 INFO L87 Difference]: Start difference. First operand 208 states and 275 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 4 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-16 21:38:18,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:18,289 INFO L93 Difference]: Finished difference Result 401 states and 523 transitions. [2021-11-16 21:38:18,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 21:38:18,290 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 4 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 147 [2021-11-16 21:38:18,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:18,292 INFO L225 Difference]: With dead ends: 401 [2021-11-16 21:38:18,292 INFO L226 Difference]: Without dead ends: 208 [2021-11-16 21:38:18,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-16 21:38:18,295 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 13 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:18,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 1263 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:38:18,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-16 21:38:18,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-11-16 21:38:18,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 132 states have (on average 1.2045454545454546) internal successors, (159), 135 states have internal predecessors, (159), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2021-11-16 21:38:18,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 274 transitions. [2021-11-16 21:38:18,313 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 274 transitions. Word has length 147 [2021-11-16 21:38:18,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:18,314 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 274 transitions. [2021-11-16 21:38:18,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 4 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-16 21:38:18,314 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 274 transitions. [2021-11-16 21:38:18,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-16 21:38:18,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:18,316 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:38:18,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-16 21:38:18,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:18,539 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:18,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:18,540 INFO L85 PathProgramCache]: Analyzing trace with hash -50417486, now seen corresponding path program 1 times [2021-11-16 21:38:18,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:18,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731220182] [2021-11-16 21:38:18,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:18,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:18,577 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:18,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294463395] [2021-11-16 21:38:18,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:18,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:18,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:18,579 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:38:18,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-16 21:38:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:19,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 2324 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-16 21:38:19,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-16 21:38:19,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:38:19,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:19,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731220182] [2021-11-16 21:38:19,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:19,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294463395] [2021-11-16 21:38:19,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294463395] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:38:19,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:38:19,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-16 21:38:19,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039858775] [2021-11-16 21:38:19,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:38:19,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 21:38:19,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:19,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 21:38:19,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 21:38:19,241 INFO L87 Difference]: Start difference. First operand 208 states and 274 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-16 21:38:19,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:19,256 INFO L93 Difference]: Finished difference Result 397 states and 520 transitions. [2021-11-16 21:38:19,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 21:38:19,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 149 [2021-11-16 21:38:19,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:19,259 INFO L225 Difference]: With dead ends: 397 [2021-11-16 21:38:19,259 INFO L226 Difference]: Without dead ends: 210 [2021-11-16 21:38:19,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 21:38:19,260 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 1 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:19,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 517 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:38:19,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-16 21:38:19,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2021-11-16 21:38:19,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 133 states have (on average 1.2030075187969924) internal successors, (160), 136 states have internal predecessors, (160), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2021-11-16 21:38:19,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 275 transitions. [2021-11-16 21:38:19,270 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 275 transitions. Word has length 149 [2021-11-16 21:38:19,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:19,271 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 275 transitions. [2021-11-16 21:38:19,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-16 21:38:19,271 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 275 transitions. [2021-11-16 21:38:19,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-16 21:38:19,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:19,273 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:38:19,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-16 21:38:19,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:19,500 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:19,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:19,500 INFO L85 PathProgramCache]: Analyzing trace with hash 2024331122, now seen corresponding path program 1 times [2021-11-16 21:38:19,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:19,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250605050] [2021-11-16 21:38:19,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:19,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:19,537 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:19,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98327470] [2021-11-16 21:38:19,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:19,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:19,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:19,539 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:38:19,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-16 21:38:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:38:19,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 2338 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-16 21:38:19,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 159 proven. 1 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-16 21:38:20,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:38:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2021-11-16 21:38:20,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:20,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250605050] [2021-11-16 21:38:20,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:20,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98327470] [2021-11-16 21:38:20,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98327470] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:38:20,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:38:20,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-16 21:38:20,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918997849] [2021-11-16 21:38:20,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:38:20,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-16 21:38:20,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:20,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-16 21:38:20,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-16 21:38:20,853 INFO L87 Difference]: Start difference. First operand 209 states and 275 transitions. Second operand has 13 states, 11 states have (on average 8.0) internal successors, (88), 13 states have internal predecessors, (88), 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) [2021-11-16 21:38:20,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:20,988 INFO L93 Difference]: Finished difference Result 406 states and 527 transitions. [2021-11-16 21:38:20,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 21:38:20,992 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.0) internal successors, (88), 13 states have internal predecessors, (88), 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 153 [2021-11-16 21:38:20,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:20,993 INFO L225 Difference]: With dead ends: 406 [2021-11-16 21:38:20,993 INFO L226 Difference]: Without dead ends: 212 [2021-11-16 21:38:20,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-11-16 21:38:20,995 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 35 mSDsluCounter, 1512 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:20,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1767 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:38:20,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-16 21:38:21,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2021-11-16 21:38:21,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 135 states have (on average 1.2) internal successors, (162), 138 states have internal predecessors, (162), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2021-11-16 21:38:21,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 277 transitions. [2021-11-16 21:38:21,014 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 277 transitions. Word has length 153 [2021-11-16 21:38:21,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:21,014 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 277 transitions. [2021-11-16 21:38:21,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.0) internal successors, (88), 13 states have internal predecessors, (88), 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) [2021-11-16 21:38:21,015 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 277 transitions. [2021-11-16 21:38:21,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-16 21:38:21,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:21,016 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:38:21,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-16 21:38:21,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:21,224 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:21,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:21,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1553173810, now seen corresponding path program 2 times [2021-11-16 21:38:21,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:21,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946531800] [2021-11-16 21:38:21,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:21,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:21,261 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:21,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133691960] [2021-11-16 21:38:21,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:38:21,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:21,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:21,263 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:38:21,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-16 21:38:21,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 21:38:21,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:38:21,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 2352 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-16 21:38:21,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 167 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-11-16 21:38:22,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:38:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-11-16 21:38:22,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:22,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946531800] [2021-11-16 21:38:22,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:22,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133691960] [2021-11-16 21:38:22,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133691960] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:38:22,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:38:22,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-16 21:38:22,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578021837] [2021-11-16 21:38:22,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:38:22,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-16 21:38:22,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:22,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-16 21:38:22,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-16 21:38:22,840 INFO L87 Difference]: Start difference. First operand 211 states and 277 transitions. Second operand has 15 states, 13 states have (on average 7.076923076923077) internal successors, (92), 15 states have internal predecessors, (92), 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) [2021-11-16 21:38:23,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:23,011 INFO L93 Difference]: Finished difference Result 410 states and 531 transitions. [2021-11-16 21:38:23,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 21:38:23,011 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 7.076923076923077) internal successors, (92), 15 states have internal predecessors, (92), 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 157 [2021-11-16 21:38:23,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:23,013 INFO L225 Difference]: With dead ends: 410 [2021-11-16 21:38:23,013 INFO L226 Difference]: Without dead ends: 214 [2021-11-16 21:38:23,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-11-16 21:38:23,014 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 29 mSDsluCounter, 1764 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:23,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 2019 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:38:23,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-16 21:38:23,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2021-11-16 21:38:23,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 137 states have (on average 1.197080291970803) internal successors, (164), 140 states have internal predecessors, (164), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2021-11-16 21:38:23,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 279 transitions. [2021-11-16 21:38:23,023 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 279 transitions. Word has length 157 [2021-11-16 21:38:23,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:23,024 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 279 transitions. [2021-11-16 21:38:23,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 7.076923076923077) internal successors, (92), 15 states have internal predecessors, (92), 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) [2021-11-16 21:38:23,024 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 279 transitions. [2021-11-16 21:38:23,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-16 21:38:23,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:23,026 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:38:23,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-16 21:38:23,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:23,239 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:23,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:23,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1663013362, now seen corresponding path program 3 times [2021-11-16 21:38:23,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:23,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494978571] [2021-11-16 21:38:23,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:23,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:23,273 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:23,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665743752] [2021-11-16 21:38:23,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-16 21:38:23,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:23,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:23,275 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:38:23,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-16 21:38:29,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-16 21:38:29,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:38:29,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 2020 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-16 21:38:29,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:29,549 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 49 proven. 9 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-11-16 21:38:29,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:38:30,193 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 34 proven. 9 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-11-16 21:38:30,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:30,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494978571] [2021-11-16 21:38:30,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:30,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665743752] [2021-11-16 21:38:30,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665743752] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:38:30,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:38:30,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-16 21:38:30,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912582129] [2021-11-16 21:38:30,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:38:30,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-16 21:38:30,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:30,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-16 21:38:30,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-11-16 21:38:30,196 INFO L87 Difference]: Start difference. First operand 213 states and 279 transitions. Second operand has 19 states, 17 states have (on average 4.882352941176471) internal successors, (83), 19 states have internal predecessors, (83), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2021-11-16 21:38:30,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:30,453 INFO L93 Difference]: Finished difference Result 414 states and 535 transitions. [2021-11-16 21:38:30,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 21:38:30,454 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 4.882352941176471) internal successors, (83), 19 states have internal predecessors, (83), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) Word has length 161 [2021-11-16 21:38:30,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:30,456 INFO L225 Difference]: With dead ends: 414 [2021-11-16 21:38:30,457 INFO L226 Difference]: Without dead ends: 216 [2021-11-16 21:38:30,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-11-16 21:38:30,458 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 46 mSDsluCounter, 2270 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 2525 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:30,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 2525 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:38:30,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-16 21:38:30,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2021-11-16 21:38:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 139 states have (on average 1.1942446043165467) internal successors, (166), 142 states have internal predecessors, (166), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2021-11-16 21:38:30,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 281 transitions. [2021-11-16 21:38:30,467 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 281 transitions. Word has length 161 [2021-11-16 21:38:30,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:30,467 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 281 transitions. [2021-11-16 21:38:30,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 4.882352941176471) internal successors, (83), 19 states have internal predecessors, (83), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2021-11-16 21:38:30,468 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 281 transitions. [2021-11-16 21:38:30,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-16 21:38:30,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:30,469 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:38:30,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-16 21:38:30,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-16 21:38:30,683 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:30,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:30,684 INFO L85 PathProgramCache]: Analyzing trace with hash -650271310, now seen corresponding path program 4 times [2021-11-16 21:38:30,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:30,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144523686] [2021-11-16 21:38:30,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:30,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:30,737 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:30,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74133699] [2021-11-16 21:38:30,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-16 21:38:30,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:30,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:30,739 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:38:30,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-16 21:38:31,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-16 21:38:31,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:38:31,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 2380 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-16 21:38:31,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 36 proven. 60 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2021-11-16 21:38:32,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:38:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-11-16 21:38:32,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:32,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144523686] [2021-11-16 21:38:32,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:32,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74133699] [2021-11-16 21:38:32,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74133699] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:38:32,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:38:33,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-11-16 21:38:33,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319906661] [2021-11-16 21:38:33,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:38:33,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-16 21:38:33,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:33,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-16 21:38:33,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-11-16 21:38:33,002 INFO L87 Difference]: Start difference. First operand 215 states and 281 transitions. Second operand has 23 states, 21 states have (on average 4.571428571428571) internal successors, (96), 23 states have internal predecessors, (96), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) [2021-11-16 21:38:33,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:33,316 INFO L93 Difference]: Finished difference Result 418 states and 539 transitions. [2021-11-16 21:38:33,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 21:38:33,317 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 4.571428571428571) internal successors, (96), 23 states have internal predecessors, (96), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) Word has length 165 [2021-11-16 21:38:33,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:33,319 INFO L225 Difference]: With dead ends: 418 [2021-11-16 21:38:33,319 INFO L226 Difference]: Without dead ends: 218 [2021-11-16 21:38:33,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-11-16 21:38:33,323 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 42 mSDsluCounter, 3542 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3797 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:33,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 3797 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 21:38:33,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-16 21:38:33,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-11-16 21:38:33,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 141 states have (on average 1.1914893617021276) internal successors, (168), 144 states have internal predecessors, (168), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2021-11-16 21:38:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 283 transitions. [2021-11-16 21:38:33,335 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 283 transitions. Word has length 165 [2021-11-16 21:38:33,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:33,337 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 283 transitions. [2021-11-16 21:38:33,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 4.571428571428571) internal successors, (96), 23 states have internal predecessors, (96), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) [2021-11-16 21:38:33,338 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 283 transitions. [2021-11-16 21:38:33,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-16 21:38:33,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:33,340 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:38:33,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-16 21:38:33,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:33,553 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:33,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:33,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1517193330, now seen corresponding path program 5 times [2021-11-16 21:38:33,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:33,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778003905] [2021-11-16 21:38:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:33,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:33,590 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:33,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756291482] [2021-11-16 21:38:33,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-16 21:38:33,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:33,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:33,592 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:38:33,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-16 21:38:34,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-16 21:38:34,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:38:34,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-16 21:38:34,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:38:34,583 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 215 proven. 25 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-16 21:38:34,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:38:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2021-11-16 21:38:35,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:38:35,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778003905] [2021-11-16 21:38:35,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:38:35,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756291482] [2021-11-16 21:38:35,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756291482] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:38:35,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:38:35,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-11-16 21:38:35,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721616252] [2021-11-16 21:38:35,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:38:35,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-16 21:38:35,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:38:35,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-16 21:38:35,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-16 21:38:35,267 INFO L87 Difference]: Start difference. First operand 217 states and 283 transitions. Second operand has 21 states, 19 states have (on average 5.473684210526316) internal successors, (104), 21 states have internal predecessors, (104), 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) [2021-11-16 21:38:35,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:38:35,533 INFO L93 Difference]: Finished difference Result 422 states and 543 transitions. [2021-11-16 21:38:35,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-16 21:38:35,534 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 5.473684210526316) internal successors, (104), 21 states have internal predecessors, (104), 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 [2021-11-16 21:38:35,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:38:35,539 INFO L225 Difference]: With dead ends: 422 [2021-11-16 21:38:35,539 INFO L226 Difference]: Without dead ends: 220 [2021-11-16 21:38:35,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-11-16 21:38:35,541 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 51 mSDsluCounter, 2524 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 2779 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:38:35,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 2779 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 21:38:35,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-16 21:38:35,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2021-11-16 21:38:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 143 states have (on average 1.1888111888111887) internal successors, (170), 146 states have internal predecessors, (170), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2021-11-16 21:38:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 285 transitions. [2021-11-16 21:38:35,552 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 285 transitions. Word has length 169 [2021-11-16 21:38:35,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:38:35,552 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 285 transitions. [2021-11-16 21:38:35,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 5.473684210526316) internal successors, (104), 21 states have internal predecessors, (104), 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) [2021-11-16 21:38:35,553 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 285 transitions. [2021-11-16 21:38:35,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-16 21:38:35,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:38:35,555 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:38:35,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-16 21:38:35,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-16 21:38:35,779 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:38:35,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:38:35,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1933379022, now seen corresponding path program 6 times [2021-11-16 21:38:35,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:38:35,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378822781] [2021-11-16 21:38:35,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:38:35,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:38:35,826 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:38:35,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039299772] [2021-11-16 21:38:35,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-16 21:38:35,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:38:35,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:38:35,828 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:38:35,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process Killed by 15