./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:12:02,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:12:02,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:12:02,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:12:02,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:12:02,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:12:02,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:12:02,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:12:02,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:12:02,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:12:02,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:12:02,986 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:12:02,986 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:12:02,988 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:12:02,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:12:02,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:12:02,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:12:02,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:12:02,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:12:02,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:12:02,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:12:02,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:12:02,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:12:02,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:12:02,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:12:02,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:12:02,997 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:12:02,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:12:02,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:12:02,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:12:02,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:12:02,999 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:12:02,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:12:03,000 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:12:03,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:12:03,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:12:03,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:12:03,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:12:03,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:12:03,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:12:03,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:12:03,009 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-28 03:12:03,039 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:12:03,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:12:03,041 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:12:03,041 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:12:03,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:12:03,042 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:12:03,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:12:03,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:12:03,043 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:12:03,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:12:03,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:12:03,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:12:03,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:12:03,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:12:03,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:12:03,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:12:03,045 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:12:03,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:12:03,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:12:03,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:12:03,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:12:03,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:12:03,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:12:03,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:12:03,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:12:03,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:12:03,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:12:03,046 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:12:03,047 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:12:03,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:12:03,047 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 [2021-12-28 03:12:03,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:12:03,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:12:03,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:12:03,333 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:12:03,334 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:12:03,336 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2021-12-28 03:12:03,386 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8248d2604/8af3cb575f5f42499ff485247a254800/FLAG6f143d144 [2021-12-28 03:12:03,980 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:12:03,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2021-12-28 03:12:04,008 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8248d2604/8af3cb575f5f42499ff485247a254800/FLAG6f143d144 [2021-12-28 03:12:04,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8248d2604/8af3cb575f5f42499ff485247a254800 [2021-12-28 03:12:04,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:12:04,414 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:12:04,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:12:04,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:12:04,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:12:04,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:12:04" (1/1) ... [2021-12-28 03:12:04,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@474dd63c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:04, skipping insertion in model container [2021-12-28 03:12:04,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:12:04" (1/1) ... [2021-12-28 03:12:04,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:12:04,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:12:04,686 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2021-12-28 03:12:04,692 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2021-12-28 03:12:05,140 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-28 03:12:05,197 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,198 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,198 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,199 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,200 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,206 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,208 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,209 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,209 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,210 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,211 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,212 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,213 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,382 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-28 03:12:05,382 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-28 03:12:05,383 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-28 03:12:05,384 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-28 03:12:05,384 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-28 03:12:05,385 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-28 03:12:05,385 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-28 03:12:05,399 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-28 03:12:05,400 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-28 03:12:05,401 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-28 03:12:05,467 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,472 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:12:05,532 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:12:05,542 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2021-12-28 03:12:05,543 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2021-12-28 03:12:05,587 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-28 03:12:05,597 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,609 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,610 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,611 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,611 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,644 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,644 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,645 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,645 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,646 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,646 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,647 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,647 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,667 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-28 03:12:05,668 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-28 03:12:05,668 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-28 03:12:05,669 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-28 03:12:05,669 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-28 03:12:05,683 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-28 03:12:05,684 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-28 03:12:05,684 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-28 03:12:05,684 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-28 03:12:05,685 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-28 03:12:05,694 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,697 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:05,729 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:12:05,918 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:12:05,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:05 WrapperNode [2021-12-28 03:12:05,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:12:05,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:12:05,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:12:05,919 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:12:05,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:05" (1/1) ... [2021-12-28 03:12:05,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:05" (1/1) ... [2021-12-28 03:12:06,058 INFO L137 Inliner]: procedures = 690, calls = 1553, calls flagged for inlining = 48, calls inlined = 7, statements flattened = 577 [2021-12-28 03:12:06,061 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:12:06,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:12:06,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:12:06,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:12:06,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:05" (1/1) ... [2021-12-28 03:12:06,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:05" (1/1) ... [2021-12-28 03:12:06,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:05" (1/1) ... [2021-12-28 03:12:06,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:05" (1/1) ... [2021-12-28 03:12:06,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:05" (1/1) ... [2021-12-28 03:12:06,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:05" (1/1) ... [2021-12-28 03:12:06,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:05" (1/1) ... [2021-12-28 03:12:06,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:12:06,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:12:06,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:12:06,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:12:06,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:05" (1/1) ... [2021-12-28 03:12:06,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:12:06,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:12:06,176 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 03:12:06,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 03:12:06,211 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-12-28 03:12:06,212 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-12-28 03:12:06,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:12:06,212 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-12-28 03:12:06,213 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-12-28 03:12:06,213 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-12-28 03:12:06,213 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-12-28 03:12:06,214 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-28 03:12:06,214 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-28 03:12:06,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:12:06,214 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-28 03:12:06,214 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-28 03:12:06,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-28 03:12:06,215 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-28 03:12:06,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 03:12:06,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:12:06,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 03:12:06,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:12:06,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:12:06,216 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-28 03:12:06,216 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-28 03:12:06,216 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-12-28 03:12:06,217 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-12-28 03:12:06,217 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-12-28 03:12:06,217 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-12-28 03:12:06,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-28 03:12:06,217 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-28 03:12:06,218 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 03:12:06,218 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 03:12:06,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:12:06,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 03:12:06,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 03:12:06,219 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-28 03:12:06,219 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-28 03:12:06,219 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-12-28 03:12:06,219 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-12-28 03:12:06,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:12:06,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:12:06,439 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:12:06,441 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:12:06,932 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:12:06,938 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:12:06,938 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-28 03:12:06,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:12:06 BoogieIcfgContainer [2021-12-28 03:12:06,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:12:06,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:12:06,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:12:06,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:12:06,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:12:04" (1/3) ... [2021-12-28 03:12:06,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@771531ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:12:06, skipping insertion in model container [2021-12-28 03:12:06,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:05" (2/3) ... [2021-12-28 03:12:06,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@771531ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:12:06, skipping insertion in model container [2021-12-28 03:12:06,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:12:06" (3/3) ... [2021-12-28 03:12:06,945 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_list_clean_up_harness.i [2021-12-28 03:12:06,949 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:12:06,949 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:12:06,987 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:12:06,991 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 03:12:06,992 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 03:12:07,006 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-28 03:12:07,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 03:12:07,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:07,014 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-28 03:12:07,015 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:07,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:07,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1460968734, now seen corresponding path program 1 times [2021-12-28 03:12:07,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:12:07,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99466567] [2021-12-28 03:12:07,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:07,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:12:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:07,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:12:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:07,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:12:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:07,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:12:07,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:07,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:12:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:07,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 03:12:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:07,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:12:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:07,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-28 03:12:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:07,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:12:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:07,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-28 03:12:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-28 03:12:07,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:12:07,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99466567] [2021-12-28 03:12:07,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99466567] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:12:07,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:12:07,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 03:12:07,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370195860] [2021-12-28 03:12:07,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:12:07,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:12:07,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:12:07,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:12:07,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:12:07,521 INFO L87 Difference]: Start difference. First operand has 114 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 03:12:07,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:07,775 INFO L93 Difference]: Finished difference Result 228 states and 297 transitions. [2021-12-28 03:12:07,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:12:07,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 65 [2021-12-28 03:12:07,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:07,784 INFO L225 Difference]: With dead ends: 228 [2021-12-28 03:12:07,784 INFO L226 Difference]: Without dead ends: 114 [2021-12-28 03:12:07,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:12:07,789 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 35 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:07,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 162 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:12:07,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-28 03:12:07,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2021-12-28 03:12:07,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 72 states have internal predecessors, (87), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-28 03:12:07,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2021-12-28 03:12:07,836 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 65 [2021-12-28 03:12:07,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:07,837 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2021-12-28 03:12:07,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 03:12:07,839 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2021-12-28 03:12:07,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-28 03:12:07,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:07,846 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-28 03:12:07,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:12:07,847 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:07,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:07,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1894775411, now seen corresponding path program 1 times [2021-12-28 03:12:07,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:12:07,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753056418] [2021-12-28 03:12:07,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:07,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:12:07,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:07,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:12:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:08,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:12:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:08,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:12:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:08,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:12:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:08,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 03:12:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:08,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:12:08,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:08,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-28 03:12:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:08,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:12:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:08,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:12:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:08,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-28 03:12:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:08,142 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-28 03:12:08,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:12:08,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753056418] [2021-12-28 03:12:08,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753056418] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:12:08,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:12:08,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 03:12:08,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888496514] [2021-12-28 03:12:08,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:12:08,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:12:08,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:12:08,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:12:08,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:12:08,146 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-28 03:12:08,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:08,538 INFO L93 Difference]: Finished difference Result 199 states and 243 transitions. [2021-12-28 03:12:08,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:12:08,539 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 71 [2021-12-28 03:12:08,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:08,542 INFO L225 Difference]: With dead ends: 199 [2021-12-28 03:12:08,543 INFO L226 Difference]: Without dead ends: 126 [2021-12-28 03:12:08,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:12:08,546 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 88 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:08,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 329 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 03:12:08,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-28 03:12:08,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 109. [2021-12-28 03:12:08,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 74 states have internal predecessors, (88), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-12-28 03:12:08,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2021-12-28 03:12:08,560 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 71 [2021-12-28 03:12:08,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:08,561 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2021-12-28 03:12:08,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-28 03:12:08,561 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2021-12-28 03:12:08,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-28 03:12:08,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:08,562 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-28 03:12:08,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 03:12:08,563 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:08,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:08,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1692678563, now seen corresponding path program 1 times [2021-12-28 03:12:08,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:12:08,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599045789] [2021-12-28 03:12:08,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:08,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:12:08,617 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 03:12:08,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705391139] [2021-12-28 03:12:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:08,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:08,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:12:08,619 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:12:08,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 03:12:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:08,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 2123 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-28 03:12:08,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-28 03:12:09,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:12:09,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:12:09,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599045789] [2021-12-28 03:12:09,147 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 03:12:09,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705391139] [2021-12-28 03:12:09,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705391139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:12:09,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:12:09,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 03:12:09,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156738590] [2021-12-28 03:12:09,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:12:09,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:12:09,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:12:09,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:12:09,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:12:09,149 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-28 03:12:09,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:09,189 INFO L93 Difference]: Finished difference Result 190 states and 229 transitions. [2021-12-28 03:12:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:12:09,190 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 86 [2021-12-28 03:12:09,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:09,193 INFO L225 Difference]: With dead ends: 190 [2021-12-28 03:12:09,193 INFO L226 Difference]: Without dead ends: 117 [2021-12-28 03:12:09,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:12:09,197 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 4 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:09,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 890 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:12:09,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-28 03:12:09,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2021-12-28 03:12:09,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-28 03:12:09,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2021-12-28 03:12:09,215 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 86 [2021-12-28 03:12:09,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:09,215 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2021-12-28 03:12:09,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-28 03:12:09,216 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2021-12-28 03:12:09,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-28 03:12:09,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:09,218 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:12:09,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 03:12:09,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:09,436 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:09,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:09,436 INFO L85 PathProgramCache]: Analyzing trace with hash -124616364, now seen corresponding path program 1 times [2021-12-28 03:12:09,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:12:09,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271057636] [2021-12-28 03:12:09,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:09,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:12:09,496 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 03:12:09,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356141095] [2021-12-28 03:12:09,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:09,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:09,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:12:09,498 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:12:09,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 03:12:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:09,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-28 03:12:09,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 03:12:09,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:12:09,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:12:09,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271057636] [2021-12-28 03:12:09,901 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 03:12:09,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356141095] [2021-12-28 03:12:09,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356141095] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:12:09,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:12:09,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:12:09,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626192892] [2021-12-28 03:12:09,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:12:09,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:12:09,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:12:09,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:12:09,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:12:09,903 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 03:12:09,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:09,918 INFO L93 Difference]: Finished difference Result 134 states and 158 transitions. [2021-12-28 03:12:09,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 03:12:09,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2021-12-28 03:12:09,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:09,919 INFO L225 Difference]: With dead ends: 134 [2021-12-28 03:12:09,919 INFO L226 Difference]: Without dead ends: 114 [2021-12-28 03:12:09,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:12:09,920 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 2 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:09,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 382 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:12:09,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-28 03:12:09,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-12-28 03:12:09,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 78 states have internal predecessors, (92), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-28 03:12:09,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2021-12-28 03:12:09,926 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 86 [2021-12-28 03:12:09,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:09,927 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2021-12-28 03:12:09,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 03:12:09,927 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2021-12-28 03:12:09,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-28 03:12:09,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:09,928 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:12:09,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-28 03:12:10,148 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,SelfDestructingSolverStorable3 [2021-12-28 03:12:10,148 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:10,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:10,149 INFO L85 PathProgramCache]: Analyzing trace with hash -117447722, now seen corresponding path program 1 times [2021-12-28 03:12:10,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:12:10,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755468395] [2021-12-28 03:12:10,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:10,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:12:10,188 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 03:12:10,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770643213] [2021-12-28 03:12:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:10,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:10,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:12:10,190 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:12:10,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 03:12:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:10,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 2145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 03:12:10,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 03:12:10,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:12:10,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:12:10,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755468395] [2021-12-28 03:12:10,640 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 03:12:10,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770643213] [2021-12-28 03:12:10,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770643213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:12:10,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:12:10,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:12:10,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383499644] [2021-12-28 03:12:10,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:12:10,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:12:10,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:12:10,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:12:10,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:12:10,642 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 03:12:10,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:10,667 INFO L93 Difference]: Finished difference Result 166 states and 198 transitions. [2021-12-28 03:12:10,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 03:12:10,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 87 [2021-12-28 03:12:10,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:10,669 INFO L225 Difference]: With dead ends: 166 [2021-12-28 03:12:10,669 INFO L226 Difference]: Without dead ends: 119 [2021-12-28 03:12:10,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:12:10,670 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 7 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:10,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 370 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:12:10,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-28 03:12:10,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2021-12-28 03:12:10,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.1923076923076923) internal successors, (93), 79 states have internal predecessors, (93), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-28 03:12:10,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 138 transitions. [2021-12-28 03:12:10,675 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 138 transitions. Word has length 87 [2021-12-28 03:12:10,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:10,676 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 138 transitions. [2021-12-28 03:12:10,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 03:12:10,676 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 138 transitions. [2021-12-28 03:12:10,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-28 03:12:10,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:10,677 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-28 03:12:10,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 03:12:10,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:10,893 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:10,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:10,893 INFO L85 PathProgramCache]: Analyzing trace with hash 995990719, now seen corresponding path program 1 times [2021-12-28 03:12:10,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:12:10,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511097214] [2021-12-28 03:12:10,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:10,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:12:10,938 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 03:12:10,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013788902] [2021-12-28 03:12:10,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:10,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:10,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:12:10,940 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) [2021-12-28 03:12:10,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 03:12:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:11,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 2148 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-28 03:12:11,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:11,447 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 03:12:11,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:12:11,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:12:11,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511097214] [2021-12-28 03:12:11,448 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 03:12:11,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013788902] [2021-12-28 03:12:11,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013788902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:12:11,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:12:11,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:12:11,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450011243] [2021-12-28 03:12:11,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:12:11,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:12:11,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:12:11,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:12:11,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:12:11,450 INFO L87 Difference]: Start difference. First operand 115 states and 138 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 03:12:11,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:11,474 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2021-12-28 03:12:11,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:12:11,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 87 [2021-12-28 03:12:11,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:11,475 INFO L225 Difference]: With dead ends: 160 [2021-12-28 03:12:11,475 INFO L226 Difference]: Without dead ends: 117 [2021-12-28 03:12:11,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:12:11,478 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 4 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:11,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 510 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:12:11,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-28 03:12:11,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2021-12-28 03:12:11,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 79 states have internal predecessors, (92), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-28 03:12:11,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 137 transitions. [2021-12-28 03:12:11,486 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 137 transitions. Word has length 87 [2021-12-28 03:12:11,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:11,487 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 137 transitions. [2021-12-28 03:12:11,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 03:12:11,487 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 137 transitions. [2021-12-28 03:12:11,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-28 03:12:11,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:11,488 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:12:11,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 03:12:11,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:11,691 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:11,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:11,692 INFO L85 PathProgramCache]: Analyzing trace with hash -462422751, now seen corresponding path program 1 times [2021-12-28 03:12:11,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:12:11,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726583725] [2021-12-28 03:12:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:11,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:12:11,726 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 03:12:11,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299130849] [2021-12-28 03:12:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:11,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:11,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:12:11,728 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) [2021-12-28 03:12:11,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 03:12:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:12,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 2152 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-28 03:12:12,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:13,347 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_#Ultimate.C_memset_#t~loopctr731_5| Int) (|#Ultimate.C_memset_#ptr.offset| Int)) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| (store (select |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base|) (+ |#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr731_5|) |c_#Ultimate.C_memset_#value|)) |c_#memory_int|)) is different from true [2021-12-28 03:12:13,399 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-28 03:12:13,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2021-12-28 03:12:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2021-12-28 03:12:13,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:12:15,058 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_#Ultimate.C_memset_#t~loopctr731_11| Int) (|v_#Ultimate.C_memset_#ptr.offset_6| Int)) (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_array_list_clean_up_~list#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_aws_array_list_clean_up_~list#1.base|) (+ |v_#Ultimate.C_memset_#t~loopctr731_11| |v_#Ultimate.C_memset_#ptr.offset_6|) 0)) |c_ULTIMATE.start_aws_array_list_clean_up_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_array_list_clean_up_harness_~#list~0#1.offset|) 256) 0)) is different from false [2021-12-28 03:12:15,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:12:15,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726583725] [2021-12-28 03:12:15,060 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 03:12:15,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299130849] [2021-12-28 03:12:15,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299130849] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:12:15,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:12:15,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-12-28 03:12:15,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634024411] [2021-12-28 03:12:15,060 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-28 03:12:15,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-28 03:12:15,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:12:15,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-28 03:12:15,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=388, Unknown=2, NotChecked=82, Total=552 [2021-12-28 03:12:15,061 INFO L87 Difference]: Start difference. First operand 115 states and 137 transitions. Second operand has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 6 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-28 03:12:15,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:15,513 INFO L93 Difference]: Finished difference Result 172 states and 217 transitions. [2021-12-28 03:12:15,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-28 03:12:15,513 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 6 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 90 [2021-12-28 03:12:15,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:15,514 INFO L225 Difference]: With dead ends: 172 [2021-12-28 03:12:15,514 INFO L226 Difference]: Without dead ends: 165 [2021-12-28 03:12:15,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=142, Invalid=794, Unknown=2, NotChecked=118, Total=1056 [2021-12-28 03:12:15,515 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 91 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 602 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:15,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 803 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 377 Invalid, 0 Unknown, 602 Unchecked, 0.3s Time] [2021-12-28 03:12:15,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-28 03:12:15,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2021-12-28 03:12:15,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 112 states have (on average 1.1875) internal successors, (133), 115 states have internal predecessors, (133), 30 states have call successors, (30), 15 states have call predecessors, (30), 19 states have return successors, (43), 31 states have call predecessors, (43), 29 states have call successors, (43) [2021-12-28 03:12:15,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 206 transitions. [2021-12-28 03:12:15,523 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 206 transitions. Word has length 90 [2021-12-28 03:12:15,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:15,523 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 206 transitions. [2021-12-28 03:12:15,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 6 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-28 03:12:15,524 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 206 transitions. [2021-12-28 03:12:15,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-28 03:12:15,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:15,525 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:12:15,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 03:12:15,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:15,739 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:15,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:15,739 INFO L85 PathProgramCache]: Analyzing trace with hash 893232516, now seen corresponding path program 1 times [2021-12-28 03:12:15,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:12:15,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263008725] [2021-12-28 03:12:15,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:15,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:12:15,779 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 03:12:15,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789128187] [2021-12-28 03:12:15,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:15,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:15,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:12:15,781 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) [2021-12-28 03:12:15,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 03:12:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:16,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 2191 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-28 03:12:16,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:16,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:12:16,268 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-28 03:12:16,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-28 03:12:16,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-28 03:12:16,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:12:16,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2021-12-28 03:12:16,547 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_391 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_391) |c_#memory_$Pointer$.base|)) is different from true [2021-12-28 03:12:16,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:12:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 03:12:16,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:12:17,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:12:17,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263008725] [2021-12-28 03:12:17,003 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 03:12:17,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789128187] [2021-12-28 03:12:17,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789128187] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:12:17,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:12:17,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-12-28 03:12:17,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655443451] [2021-12-28 03:12:17,003 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-28 03:12:17,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-28 03:12:17,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:12:17,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-28 03:12:17,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=351, Unknown=6, NotChecked=38, Total=462 [2021-12-28 03:12:17,004 INFO L87 Difference]: Start difference. First operand 162 states and 206 transitions. Second operand has 21 states, 20 states have (on average 3.15) internal successors, (63), 18 states have internal predecessors, (63), 8 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2021-12-28 03:12:17,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:17,384 INFO L93 Difference]: Finished difference Result 273 states and 341 transitions. [2021-12-28 03:12:17,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-28 03:12:17,385 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.15) internal successors, (63), 18 states have internal predecessors, (63), 8 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) Word has length 96 [2021-12-28 03:12:17,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:17,386 INFO L225 Difference]: With dead ends: 273 [2021-12-28 03:12:17,386 INFO L226 Difference]: Without dead ends: 174 [2021-12-28 03:12:17,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=546, Unknown=14, NotChecked=48, Total=702 [2021-12-28 03:12:17,387 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 92 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 682 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:17,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 514 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 467 Invalid, 0 Unknown, 682 Unchecked, 0.3s Time] [2021-12-28 03:12:17,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-28 03:12:17,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2021-12-28 03:12:17,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 119 states have (on average 1.184873949579832) internal successors, (141), 123 states have internal predecessors, (141), 30 states have call successors, (30), 16 states have call predecessors, (30), 21 states have return successors, (46), 31 states have call predecessors, (46), 29 states have call successors, (46) [2021-12-28 03:12:17,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 217 transitions. [2021-12-28 03:12:17,394 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 217 transitions. Word has length 96 [2021-12-28 03:12:17,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:17,395 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 217 transitions. [2021-12-28 03:12:17,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.15) internal successors, (63), 18 states have internal predecessors, (63), 8 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2021-12-28 03:12:17,395 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 217 transitions. [2021-12-28 03:12:17,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-28 03:12:17,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:17,396 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:12:17,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 03:12:17,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:17,611 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:17,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:17,612 INFO L85 PathProgramCache]: Analyzing trace with hash 412152258, now seen corresponding path program 1 times [2021-12-28 03:12:17,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:12:17,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113555207] [2021-12-28 03:12:17,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:17,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:12:17,685 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 03:12:17,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616015621] [2021-12-28 03:12:17,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:17,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:17,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:12:17,687 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) [2021-12-28 03:12:17,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 03:12:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:17,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 2186 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:12:17,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 03:12:18,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:12:18,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:12:18,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113555207] [2021-12-28 03:12:18,103 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 03:12:18,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616015621] [2021-12-28 03:12:18,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616015621] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:12:18,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:12:18,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:12:18,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665442024] [2021-12-28 03:12:18,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:12:18,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:12:18,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:12:18,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:12:18,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:12:18,105 INFO L87 Difference]: Start difference. First operand 171 states and 217 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-28 03:12:18,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:18,125 INFO L93 Difference]: Finished difference Result 310 states and 402 transitions. [2021-12-28 03:12:18,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:12:18,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 96 [2021-12-28 03:12:18,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:18,128 INFO L225 Difference]: With dead ends: 310 [2021-12-28 03:12:18,128 INFO L226 Difference]: Without dead ends: 179 [2021-12-28 03:12:18,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:12:18,129 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 7 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:18,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 382 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:12:18,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-28 03:12:18,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 173. [2021-12-28 03:12:18,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 121 states have (on average 1.1735537190082646) internal successors, (142), 125 states have internal predecessors, (142), 30 states have call successors, (30), 16 states have call predecessors, (30), 21 states have return successors, (46), 31 states have call predecessors, (46), 29 states have call successors, (46) [2021-12-28 03:12:18,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 218 transitions. [2021-12-28 03:12:18,137 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 218 transitions. Word has length 96 [2021-12-28 03:12:18,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:18,137 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 218 transitions. [2021-12-28 03:12:18,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-28 03:12:18,137 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 218 transitions. [2021-12-28 03:12:18,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 03:12:18,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:18,139 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:12:18,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-28 03:12:18,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:18,348 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:18,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:18,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1999511127, now seen corresponding path program 2 times [2021-12-28 03:12:18,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:12:18,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316510492] [2021-12-28 03:12:18,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:18,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:12:18,410 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 03:12:18,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1140983145] [2021-12-28 03:12:18,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:12:18,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:18,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:12:18,412 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) [2021-12-28 03:12:18,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 03:12:18,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:12:18,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:12:18,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 2171 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-28 03:12:18,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:18,907 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-28 03:12:18,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:12:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-28 03:12:19,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:12:19,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316510492] [2021-12-28 03:12:19,076 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 03:12:19,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140983145] [2021-12-28 03:12:19,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140983145] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:12:19,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:12:19,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-28 03:12:19,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652957190] [2021-12-28 03:12:19,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:12:19,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:12:19,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:12:19,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:12:19,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:12:19,077 INFO L87 Difference]: Start difference. First operand 173 states and 218 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-28 03:12:19,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:19,160 INFO L93 Difference]: Finished difference Result 262 states and 334 transitions. [2021-12-28 03:12:19,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:12:19,160 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 91 [2021-12-28 03:12:19,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:19,161 INFO L225 Difference]: With dead ends: 262 [2021-12-28 03:12:19,161 INFO L226 Difference]: Without dead ends: 185 [2021-12-28 03:12:19,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:12:19,162 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 28 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:19,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 867 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:12:19,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-28 03:12:19,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 181. [2021-12-28 03:12:19,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 129 states have (on average 1.178294573643411) internal successors, (152), 133 states have internal predecessors, (152), 30 states have call successors, (30), 16 states have call predecessors, (30), 21 states have return successors, (46), 31 states have call predecessors, (46), 29 states have call successors, (46) [2021-12-28 03:12:19,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 228 transitions. [2021-12-28 03:12:19,170 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 228 transitions. Word has length 91 [2021-12-28 03:12:19,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:19,170 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 228 transitions. [2021-12-28 03:12:19,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-28 03:12:19,171 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 228 transitions. [2021-12-28 03:12:19,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-28 03:12:19,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:19,172 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:12:19,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 03:12:19,387 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,SelfDestructingSolverStorable9 [2021-12-28 03:12:19,388 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:19,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:19,388 INFO L85 PathProgramCache]: Analyzing trace with hash 134736496, now seen corresponding path program 1 times [2021-12-28 03:12:19,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:12:19,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457924206] [2021-12-28 03:12:19,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:19,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:12:19,422 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 03:12:19,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127680397] [2021-12-28 03:12:19,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:19,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:19,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:12:19,452 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) [2021-12-28 03:12:19,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 03:12:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:19,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 2182 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 03:12:19,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:19,950 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-28 03:12:19,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:12:19,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:12:19,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457924206] [2021-12-28 03:12:19,951 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 03:12:19,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127680397] [2021-12-28 03:12:19,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127680397] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:12:19,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:12:19,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 03:12:19,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269851367] [2021-12-28 03:12:19,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:12:19,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:12:19,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:12:19,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:12:19,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:12:19,953 INFO L87 Difference]: Start difference. First operand 181 states and 228 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-28 03:12:20,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:20,086 INFO L93 Difference]: Finished difference Result 258 states and 321 transitions. [2021-12-28 03:12:20,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:12:20,087 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 93 [2021-12-28 03:12:20,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:20,088 INFO L225 Difference]: With dead ends: 258 [2021-12-28 03:12:20,088 INFO L226 Difference]: Without dead ends: 179 [2021-12-28 03:12:20,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-28 03:12:20,088 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 157 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:20,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 451 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:12:20,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-28 03:12:20,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-12-28 03:12:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 128 states have (on average 1.171875) internal successors, (150), 131 states have internal predecessors, (150), 30 states have call successors, (30), 16 states have call predecessors, (30), 20 states have return successors, (44), 31 states have call predecessors, (44), 29 states have call successors, (44) [2021-12-28 03:12:20,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 224 transitions. [2021-12-28 03:12:20,096 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 224 transitions. Word has length 93 [2021-12-28 03:12:20,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:20,096 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 224 transitions. [2021-12-28 03:12:20,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-28 03:12:20,097 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 224 transitions. [2021-12-28 03:12:20,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-28 03:12:20,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:20,098 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-28 03:12:20,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 03:12:20,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:20,311 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:20,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:20,312 INFO L85 PathProgramCache]: Analyzing trace with hash 966825052, now seen corresponding path program 1 times [2021-12-28 03:12:20,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:12:20,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541378583] [2021-12-28 03:12:20,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:20,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:12:20,350 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 03:12:20,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454116954] [2021-12-28 03:12:20,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:20,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:20,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:12:20,351 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) [2021-12-28 03:12:20,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 03:12:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:20,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 2323 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-28 03:12:20,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:20,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-28 03:12:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-28 03:12:21,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:12:21,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-12-28 03:12:21,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-28 03:12:21,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-12-28 03:12:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-28 03:12:21,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:12:21,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541378583] [2021-12-28 03:12:21,599 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 03:12:21,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454116954] [2021-12-28 03:12:21,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454116954] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:12:21,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:12:21,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2021-12-28 03:12:21,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907195713] [2021-12-28 03:12:21,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:12:21,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-28 03:12:21,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:12:21,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-28 03:12:21,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-12-28 03:12:21,601 INFO L87 Difference]: Start difference. First operand 179 states and 224 transitions. Second operand has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 21 states have internal predecessors, (83), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2021-12-28 03:12:21,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:21,910 INFO L93 Difference]: Finished difference Result 193 states and 239 transitions. [2021-12-28 03:12:21,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 03:12:21,910 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 21 states have internal predecessors, (83), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) Word has length 108 [2021-12-28 03:12:21,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:21,911 INFO L225 Difference]: With dead ends: 193 [2021-12-28 03:12:21,911 INFO L226 Difference]: Without dead ends: 186 [2021-12-28 03:12:21,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-12-28 03:12:21,912 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 43 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:21,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 1627 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 276 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2021-12-28 03:12:21,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-28 03:12:21,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 166. [2021-12-28 03:12:21,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 119 states have (on average 1.1596638655462186) internal successors, (138), 121 states have internal predecessors, (138), 27 states have call successors, (27), 16 states have call predecessors, (27), 19 states have return successors, (38), 28 states have call predecessors, (38), 26 states have call successors, (38) [2021-12-28 03:12:21,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 203 transitions. [2021-12-28 03:12:21,924 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 203 transitions. Word has length 108 [2021-12-28 03:12:21,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:21,924 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 203 transitions. [2021-12-28 03:12:21,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 21 states have internal predecessors, (83), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2021-12-28 03:12:21,924 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 203 transitions. [2021-12-28 03:12:21,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-28 03:12:21,925 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:21,925 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2021-12-28 03:12:21,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 03:12:22,146 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,SelfDestructingSolverStorable11 [2021-12-28 03:12:22,146 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:22,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:22,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1799659061, now seen corresponding path program 1 times [2021-12-28 03:12:22,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:12:22,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092133628] [2021-12-28 03:12:22,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:22,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:12:22,182 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 03:12:22,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65020926] [2021-12-28 03:12:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:22,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:22,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:12:22,184 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) [2021-12-28 03:12:22,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 03:12:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:22,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 2330 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-28 03:12:22,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-28 03:12:22,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:12:22,835 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-28 03:12:22,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:12:22,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092133628] [2021-12-28 03:12:22,835 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 03:12:22,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65020926] [2021-12-28 03:12:22,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65020926] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:12:22,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:12:22,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-28 03:12:22,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286477641] [2021-12-28 03:12:22,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:12:22,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:12:22,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:12:22,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:12:22,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:12:22,836 INFO L87 Difference]: Start difference. First operand 166 states and 203 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-28 03:12:22,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:22,906 INFO L93 Difference]: Finished difference Result 201 states and 243 transitions. [2021-12-28 03:12:22,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:12:22,907 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2021-12-28 03:12:22,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:22,908 INFO L225 Difference]: With dead ends: 201 [2021-12-28 03:12:22,908 INFO L226 Difference]: Without dead ends: 169 [2021-12-28 03:12:22,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:12:22,909 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 11 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:22,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 382 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:12:22,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-28 03:12:22,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-12-28 03:12:22,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 122 states have (on average 1.1557377049180328) internal successors, (141), 124 states have internal predecessors, (141), 27 states have call successors, (27), 16 states have call predecessors, (27), 19 states have return successors, (38), 28 states have call predecessors, (38), 26 states have call successors, (38) [2021-12-28 03:12:22,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 206 transitions. [2021-12-28 03:12:22,916 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 206 transitions. Word has length 111 [2021-12-28 03:12:22,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:22,916 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 206 transitions. [2021-12-28 03:12:22,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-28 03:12:22,917 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 206 transitions. [2021-12-28 03:12:22,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-28 03:12:22,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:22,918 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2021-12-28 03:12:22,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-28 03:12:23,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-28 03:12:23,128 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:23,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:23,129 INFO L85 PathProgramCache]: Analyzing trace with hash -564772413, now seen corresponding path program 2 times [2021-12-28 03:12:23,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:12:23,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337345526] [2021-12-28 03:12:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:23,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:12:23,170 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 03:12:23,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291508492] [2021-12-28 03:12:23,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:12:23,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:23,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:12:23,172 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:12:23,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-28 03:12:23,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:12:23,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:12:23,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 2387 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-28 03:12:23,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:23,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-28 03:12:23,876 INFO L353 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-12-28 03:12:23,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-12-28 03:12:23,924 INFO L353 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-12-28 03:12:23,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-12-28 03:12:23,963 INFO L353 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-12-28 03:12:23,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2021-12-28 03:12:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-28 03:12:24,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:12:24,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 105 [2021-12-28 03:12:25,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2021-12-28 03:12:25,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 368 treesize of output 364 [2021-12-28 03:12:25,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2021-12-28 03:12:25,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 03:12:25,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 180 [2021-12-28 03:12:25,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2021-12-28 03:12:25,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 03:12:25,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 03:12:25,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 80 [2021-12-28 03:12:25,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-12-28 03:12:25,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 03:12:25,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 03:12:25,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 03:12:25,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-12-28 03:12:25,799 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-28 03:12:25,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:12:25,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337345526] [2021-12-28 03:12:25,799 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 03:12:25,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291508492] [2021-12-28 03:12:25,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291508492] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:12:25,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:12:25,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2021-12-28 03:12:25,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043731912] [2021-12-28 03:12:25,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:12:25,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-28 03:12:25,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:12:25,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-28 03:12:25,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-12-28 03:12:25,801 INFO L87 Difference]: Start difference. First operand 169 states and 206 transitions. Second operand has 31 states, 31 states have (on average 3.0) internal successors, (93), 28 states have internal predecessors, (93), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2021-12-28 03:12:26,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:26,717 INFO L93 Difference]: Finished difference Result 184 states and 224 transitions. [2021-12-28 03:12:26,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-28 03:12:26,718 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 28 states have internal predecessors, (93), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) Word has length 114 [2021-12-28 03:12:26,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:26,719 INFO L225 Difference]: With dead ends: 184 [2021-12-28 03:12:26,719 INFO L226 Difference]: Without dead ends: 177 [2021-12-28 03:12:26,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2021-12-28 03:12:26,720 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 74 mSDsluCounter, 2000 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 2122 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:26,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 2122 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 664 Invalid, 0 Unknown, 124 Unchecked, 0.6s Time] [2021-12-28 03:12:26,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-28 03:12:26,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2021-12-28 03:12:26,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 126 states have (on average 1.1507936507936507) internal successors, (145), 129 states have internal predecessors, (145), 27 states have call successors, (27), 16 states have call predecessors, (27), 20 states have return successors, (40), 28 states have call predecessors, (40), 26 states have call successors, (40) [2021-12-28 03:12:26,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 212 transitions. [2021-12-28 03:12:26,734 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 212 transitions. Word has length 114 [2021-12-28 03:12:26,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:26,734 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 212 transitions. [2021-12-28 03:12:26,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 28 states have internal predecessors, (93), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2021-12-28 03:12:26,734 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 212 transitions. [2021-12-28 03:12:26,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-28 03:12:26,735 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:26,735 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:12:26,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-28 03:12:26,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-28 03:12:26,951 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:26,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:26,952 INFO L85 PathProgramCache]: Analyzing trace with hash -582835346, now seen corresponding path program 3 times [2021-12-28 03:12:26,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:12:26,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834681107] [2021-12-28 03:12:26,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:26,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:12:27,013 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 03:12:27,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366261861] [2021-12-28 03:12:27,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 03:12:27,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:27,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:12:27,015 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:12:27,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-28 03:12:28,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-28 03:12:28,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:12:28,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 2365 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-28 03:12:28,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:28,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-28 03:12:28,758 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-28 03:12:28,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-28 03:12:28,790 INFO L353 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-12-28 03:12:28,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-12-28 03:12:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-28 03:12:28,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:12:29,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:12:29,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834681107] [2021-12-28 03:12:29,016 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 03:12:29,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366261861] [2021-12-28 03:12:29,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366261861] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:12:29,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:12:29,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-12-28 03:12:29,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862748733] [2021-12-28 03:12:29,017 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-28 03:12:29,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 03:12:29,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:12:29,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 03:12:29,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-12-28 03:12:29,017 INFO L87 Difference]: Start difference. First operand 174 states and 212 transitions. Second operand has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 5 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-28 03:12:29,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:29,273 INFO L93 Difference]: Finished difference Result 208 states and 250 transitions. [2021-12-28 03:12:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 03:12:29,273 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 5 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 117 [2021-12-28 03:12:29,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:29,274 INFO L225 Difference]: With dead ends: 208 [2021-12-28 03:12:29,274 INFO L226 Difference]: Without dead ends: 178 [2021-12-28 03:12:29,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-12-28 03:12:29,275 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 35 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:29,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 1201 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:12:29,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-28 03:12:29,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2021-12-28 03:12:29,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 127 states have (on average 1.1496062992125984) internal successors, (146), 130 states have internal predecessors, (146), 27 states have call successors, (27), 16 states have call predecessors, (27), 20 states have return successors, (40), 28 states have call predecessors, (40), 26 states have call successors, (40) [2021-12-28 03:12:29,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 213 transitions. [2021-12-28 03:12:29,286 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 213 transitions. Word has length 117 [2021-12-28 03:12:29,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:29,287 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 213 transitions. [2021-12-28 03:12:29,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 5 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-28 03:12:29,287 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 213 transitions. [2021-12-28 03:12:29,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-28 03:12:29,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:29,288 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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] [2021-12-28 03:12:29,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-28 03:12:29,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-28 03:12:29,504 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:29,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:29,504 INFO L85 PathProgramCache]: Analyzing trace with hash 36072420, now seen corresponding path program 1 times [2021-12-28 03:12:29,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:12:29,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612433968] [2021-12-28 03:12:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:29,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:12:29,557 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 03:12:29,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105008851] [2021-12-28 03:12:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:29,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:29,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:12:29,558 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:12:29,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-28 03:12:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:29,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 2417 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-28 03:12:29,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-28 03:12:30,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:12:30,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:12:30,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612433968] [2021-12-28 03:12:30,258 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 03:12:30,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105008851] [2021-12-28 03:12:30,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105008851] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:12:30,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:12:30,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-28 03:12:30,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031242685] [2021-12-28 03:12:30,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:12:30,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-28 03:12:30,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:12:30,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-28 03:12:30,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-12-28 03:12:30,259 INFO L87 Difference]: Start difference. First operand 175 states and 213 transitions. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 11 states have internal predecessors, (72), 3 states have call successors, (15), 2 states have call predecessors, (15), 7 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-28 03:12:30,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:30,427 INFO L93 Difference]: Finished difference Result 235 states and 282 transitions. [2021-12-28 03:12:30,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 03:12:30,427 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 11 states have internal predecessors, (72), 3 states have call successors, (15), 2 states have call predecessors, (15), 7 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) Word has length 124 [2021-12-28 03:12:30,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:30,428 INFO L225 Difference]: With dead ends: 235 [2021-12-28 03:12:30,428 INFO L226 Difference]: Without dead ends: 176 [2021-12-28 03:12:30,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-12-28 03:12:30,429 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 15 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1809 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:30,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 1809 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:12:30,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-28 03:12:30,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 169. [2021-12-28 03:12:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 123 states have (on average 1.1544715447154472) internal successors, (142), 126 states have internal predecessors, (142), 26 states have call successors, (26), 16 states have call predecessors, (26), 19 states have return successors, (34), 26 states have call predecessors, (34), 25 states have call successors, (34) [2021-12-28 03:12:30,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 202 transitions. [2021-12-28 03:12:30,438 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 202 transitions. Word has length 124 [2021-12-28 03:12:30,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:30,439 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 202 transitions. [2021-12-28 03:12:30,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 11 states have internal predecessors, (72), 3 states have call successors, (15), 2 states have call predecessors, (15), 7 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-28 03:12:30,439 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 202 transitions. [2021-12-28 03:12:30,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-28 03:12:30,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:30,440 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:12:30,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-28 03:12:30,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:30,654 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:30,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:30,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1973683772, now seen corresponding path program 4 times [2021-12-28 03:12:30,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:12:30,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531202369] [2021-12-28 03:12:30,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:30,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:12:30,692 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 03:12:30,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926368111] [2021-12-28 03:12:30,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 03:12:30,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:12:30,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:12:30,694 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:12:30,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-28 03:12:31,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 03:12:31,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:12:31,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 2413 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-28 03:12:31,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:31,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-28 03:12:31,314 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-28 03:12:31,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-28 03:12:31,346 INFO L353 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-12-28 03:12:31,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-12-28 03:12:31,392 INFO L353 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-12-28 03:12:31,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2021-12-28 03:12:31,483 INFO L353 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-12-28 03:12:31,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2021-12-28 03:12:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-28 03:12:31,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:12:32,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7562 treesize of output 7514 [2021-12-28 03:12:32,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:12:32,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531202369] [2021-12-28 03:12:32,718 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 03:12:32,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926368111] [2021-12-28 03:12:32,718 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2021-12-28 03:12:32,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-28 03:12:32,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-28 03:12:32,941 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArithmeticException: BigInteger out of long range at java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.computeDerApplicabilityScore(QuantifierPusher.java:685) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.selectBestEliminatee(QuantifierPusher.java:668) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:604) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:446) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:364) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-28 03:12:32,944 INFO L158 Benchmark]: Toolchain (without parser) took 28530.35ms. Allocated memory was 60.8MB in the beginning and 312.5MB in the end (delta: 251.7MB). Free memory was 32.9MB in the beginning and 221.5MB in the end (delta: -188.6MB). Peak memory consumption was 206.1MB. Max. memory is 16.1GB. [2021-12-28 03:12:32,944 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 60.8MB. Free memory was 43.6MB in the beginning and 43.6MB in the end (delta: 49.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 03:12:32,944 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1503.83ms. Allocated memory was 60.8MB in the beginning and 109.1MB in the end (delta: 48.2MB). Free memory was 32.8MB in the beginning and 53.4MB in the end (delta: -20.7MB). Peak memory consumption was 37.5MB. Max. memory is 16.1GB. [2021-12-28 03:12:32,945 INFO L158 Benchmark]: Boogie Procedure Inliner took 142.28ms. Allocated memory is still 109.1MB. Free memory was 53.4MB in the beginning and 45.7MB in the end (delta: 7.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-28 03:12:32,945 INFO L158 Benchmark]: Boogie Preprocessor took 85.32ms. Allocated memory is still 109.1MB. Free memory was 45.7MB in the beginning and 40.2MB in the end (delta: 5.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-28 03:12:32,945 INFO L158 Benchmark]: RCFGBuilder took 792.22ms. Allocated memory is still 109.1MB. Free memory was 40.2MB in the beginning and 55.2MB in the end (delta: -15.0MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. [2021-12-28 03:12:32,945 INFO L158 Benchmark]: TraceAbstraction took 26002.67ms. Allocated memory was 109.1MB in the beginning and 312.5MB in the end (delta: 203.4MB). Free memory was 54.5MB in the beginning and 221.5MB in the end (delta: -167.1MB). Peak memory consumption was 178.7MB. Max. memory is 16.1GB. [2021-12-28 03:12:32,946 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 60.8MB. Free memory was 43.6MB in the beginning and 43.6MB in the end (delta: 49.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1503.83ms. Allocated memory was 60.8MB in the beginning and 109.1MB in the end (delta: 48.2MB). Free memory was 32.8MB in the beginning and 53.4MB in the end (delta: -20.7MB). Peak memory consumption was 37.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 142.28ms. Allocated memory is still 109.1MB. Free memory was 53.4MB in the beginning and 45.7MB in the end (delta: 7.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 85.32ms. Allocated memory is still 109.1MB. Free memory was 45.7MB in the beginning and 40.2MB in the end (delta: 5.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 792.22ms. Allocated memory is still 109.1MB. Free memory was 40.2MB in the beginning and 55.2MB in the end (delta: -15.0MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. * TraceAbstraction took 26002.67ms. Allocated memory was 109.1MB in the beginning and 312.5MB in the end (delta: 203.4MB). Free memory was 54.5MB in the beginning and 221.5MB in the end (delta: -167.1MB). Peak memory consumption was 178.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: ArithmeticException: BigInteger out of long range de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArithmeticException: BigInteger out of long range: java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-28 03:12:32,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.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 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:12:34,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:12:34,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:12:34,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:12:34,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:12:34,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:12:34,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:12:34,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:12:34,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:12:34,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:12:34,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:12:34,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:12:34,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:12:34,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:12:34,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:12:34,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:12:34,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:12:34,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:12:34,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:12:34,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:12:34,691 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:12:34,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:12:34,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:12:34,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:12:34,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:12:34,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:12:34,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:12:34,702 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:12:34,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:12:34,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:12:34,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:12:34,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:12:34,704 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:12:34,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:12:34,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:12:34,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:12:34,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:12:34,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:12:34,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:12:34,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:12:34,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:12:34,709 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-12-28 03:12:34,728 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:12:34,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:12:34,729 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:12:34,730 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:12:34,730 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:12:34,730 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:12:34,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:12:34,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:12:34,732 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:12:34,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:12:34,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:12:34,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:12:34,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:12:34,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:12:34,733 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 03:12:34,733 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-28 03:12:34,733 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-28 03:12:34,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:12:34,734 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:12:34,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:12:34,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:12:34,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:12:34,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:12:34,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:12:34,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:12:34,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:12:34,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:12:34,735 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-28 03:12:34,735 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-28 03:12:34,735 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:12:34,735 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:12:34,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:12:34,736 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-28 03:12:34,736 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 [2021-12-28 03:12:35,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:12:35,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:12:35,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:12:35,036 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:12:35,036 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:12:35,038 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2021-12-28 03:12:35,106 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/979004d37/8c03ceeb8ac24867a48f027fb162ffc8/FLAG941cc0396 [2021-12-28 03:12:35,715 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:12:35,716 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2021-12-28 03:12:35,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/979004d37/8c03ceeb8ac24867a48f027fb162ffc8/FLAG941cc0396 [2021-12-28 03:12:36,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/979004d37/8c03ceeb8ac24867a48f027fb162ffc8 [2021-12-28 03:12:36,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:12:36,071 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:12:36,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:12:36,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:12:36,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:12:36,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:12:36" (1/1) ... [2021-12-28 03:12:36,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43f698e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:36, skipping insertion in model container [2021-12-28 03:12:36,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:12:36" (1/1) ... [2021-12-28 03:12:36,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:12:36,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:12:36,386 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2021-12-28 03:12:36,392 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2021-12-28 03:12:36,921 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-28 03:12:36,983 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:36,984 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:36,984 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:36,985 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:36,986 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,007 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,008 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,009 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,010 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,011 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,013 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,013 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,014 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,249 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-28 03:12:37,250 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-28 03:12:37,251 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-28 03:12:37,251 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-28 03:12:37,252 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-28 03:12:37,253 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-28 03:12:37,253 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-28 03:12:37,254 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-28 03:12:37,254 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-28 03:12:37,254 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-28 03:12:37,313 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,317 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,355 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:12:37,377 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-28 03:12:37,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:12:37,414 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2021-12-28 03:12:37,416 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2021-12-28 03:12:37,440 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-28 03:12:37,449 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,449 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,449 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,450 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,450 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,454 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,454 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,455 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,455 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,457 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,459 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,459 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,459 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,481 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-28 03:12:37,482 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-28 03:12:37,483 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-28 03:12:37,484 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-28 03:12:37,485 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-28 03:12:37,485 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-28 03:12:37,486 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-28 03:12:37,486 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-28 03:12:37,486 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-28 03:12:37,486 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-28 03:12:37,512 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,521 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:12:37,579 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:12:37,596 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2021-12-28 03:12:37,597 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2021-12-28 03:12:37,633 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-28 03:12:37,653 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,653 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,653 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,654 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,654 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,665 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,665 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,666 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,667 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,668 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,669 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,669 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,669 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,694 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-28 03:12:37,695 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-28 03:12:37,696 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-28 03:12:37,696 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-28 03:12:37,696 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-28 03:12:37,697 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-28 03:12:37,697 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-28 03:12:37,698 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-28 03:12:37,698 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-28 03:12:37,698 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-28 03:12:37,715 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,717 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:12:37,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:12:37,933 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:12:37,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:37 WrapperNode [2021-12-28 03:12:37,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:12:37,936 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:12:37,936 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:12:37,936 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:12:37,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:37" (1/1) ... [2021-12-28 03:12:38,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:37" (1/1) ... [2021-12-28 03:12:38,061 INFO L137 Inliner]: procedures = 710, calls = 1553, calls flagged for inlining = 48, calls inlined = 7, statements flattened = 576 [2021-12-28 03:12:38,061 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:12:38,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:12:38,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:12:38,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:12:38,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:37" (1/1) ... [2021-12-28 03:12:38,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:37" (1/1) ... [2021-12-28 03:12:38,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:37" (1/1) ... [2021-12-28 03:12:38,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:37" (1/1) ... [2021-12-28 03:12:38,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:37" (1/1) ... [2021-12-28 03:12:38,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:37" (1/1) ... [2021-12-28 03:12:38,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:37" (1/1) ... [2021-12-28 03:12:38,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:12:38,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:12:38,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:12:38,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:12:38,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:37" (1/1) ... [2021-12-28 03:12:38,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:12:38,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:12:38,166 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 03:12:38,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 03:12:38,220 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-12-28 03:12:38,221 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-12-28 03:12:38,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:12:38,221 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-12-28 03:12:38,221 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-12-28 03:12:38,221 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-12-28 03:12:38,221 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-12-28 03:12:38,222 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-28 03:12:38,222 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-28 03:12:38,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-28 03:12:38,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-12-28 03:12:38,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-12-28 03:12:38,222 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-28 03:12:38,222 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-28 03:12:38,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-28 03:12:38,223 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-28 03:12:38,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 03:12:38,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:12:38,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 03:12:38,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:12:38,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:12:38,223 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-28 03:12:38,224 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-28 03:12:38,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-28 03:12:38,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-12-28 03:12:38,224 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-12-28 03:12:38,224 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-12-28 03:12:38,224 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-12-28 03:12:38,224 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-12-28 03:12:38,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-28 03:12:38,225 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-28 03:12:38,225 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 03:12:38,227 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 03:12:38,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:12:38,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 03:12:38,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-12-28 03:12:38,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 03:12:38,228 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-28 03:12:38,228 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-28 03:12:38,228 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-12-28 03:12:38,229 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-12-28 03:12:38,512 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:12:38,515 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:12:39,416 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:12:39,423 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:12:39,424 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-28 03:12:39,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:12:39 BoogieIcfgContainer [2021-12-28 03:12:39,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:12:39,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:12:39,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:12:39,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:12:39,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:12:36" (1/3) ... [2021-12-28 03:12:39,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b4b2a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:12:39, skipping insertion in model container [2021-12-28 03:12:39,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:12:37" (2/3) ... [2021-12-28 03:12:39,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b4b2a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:12:39, skipping insertion in model container [2021-12-28 03:12:39,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:12:39" (3/3) ... [2021-12-28 03:12:39,435 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_list_clean_up_harness.i [2021-12-28 03:12:39,439 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:12:39,440 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:12:39,478 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:12:39,485 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 03:12:39,485 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 03:12:39,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-28 03:12:39,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 03:12:39,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:39,509 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-28 03:12:39,509 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:39,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:39,514 INFO L85 PathProgramCache]: Analyzing trace with hash 213945854, now seen corresponding path program 1 times [2021-12-28 03:12:39,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 03:12:39,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478550986] [2021-12-28 03:12:39,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:39,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 03:12:39,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 03:12:39,529 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 03:12:39,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-28 03:12:40,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:40,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 1181 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-28 03:12:40,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-28 03:12:40,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:12:40,243 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 03:12:40,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478550986] [2021-12-28 03:12:40,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478550986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:12:40,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:12:40,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 03:12:40,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529029229] [2021-12-28 03:12:40,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:12:40,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 03:12:40,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 03:12:40,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 03:12:40,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 03:12:40,279 INFO L87 Difference]: Start difference. First operand has 114 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 03:12:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:40,307 INFO L93 Difference]: Finished difference Result 221 states and 288 transitions. [2021-12-28 03:12:40,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 03:12:40,310 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 65 [2021-12-28 03:12:40,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:40,317 INFO L225 Difference]: With dead ends: 221 [2021-12-28 03:12:40,317 INFO L226 Difference]: Without dead ends: 107 [2021-12-28 03:12:40,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 03:12:40,325 INFO L933 BasicCegarLoop]: 137 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, 137 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 [2021-12-28 03:12:40,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:12:40,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-28 03:12:40,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-12-28 03:12:40,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 72 states have internal predecessors, (87), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-28 03:12:40,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2021-12-28 03:12:40,378 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 65 [2021-12-28 03:12:40,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:40,378 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2021-12-28 03:12:40,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 03:12:40,378 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2021-12-28 03:12:40,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-28 03:12:40,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:40,387 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-28 03:12:40,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-28 03:12:40,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 03:12:40,608 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:40,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:40,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1475951998, now seen corresponding path program 1 times [2021-12-28 03:12:40,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 03:12:40,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793796826] [2021-12-28 03:12:40,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:40,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 03:12:40,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 03:12:40,613 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 03:12:40,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-28 03:12:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:41,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 03:12:41,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:41,310 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 03:12:41,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:12:41,310 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 03:12:41,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793796826] [2021-12-28 03:12:41,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793796826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:12:41,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:12:41,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:12:41,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103716551] [2021-12-28 03:12:41,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:12:41,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:12:41,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 03:12:41,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:12:41,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:12:41,313 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-28 03:12:41,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:41,481 INFO L93 Difference]: Finished difference Result 182 states and 221 transitions. [2021-12-28 03:12:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:12:41,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 71 [2021-12-28 03:12:41,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:41,490 INFO L225 Difference]: With dead ends: 182 [2021-12-28 03:12:41,490 INFO L226 Difference]: Without dead ends: 109 [2021-12-28 03:12:41,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:12:41,491 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 35 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:41,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 423 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:12:41,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-28 03:12:41,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-12-28 03:12:41,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 74 states have internal predecessors, (88), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-12-28 03:12:41,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2021-12-28 03:12:41,509 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 71 [2021-12-28 03:12:41,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:41,512 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2021-12-28 03:12:41,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-28 03:12:41,512 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2021-12-28 03:12:41,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-28 03:12:41,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:41,515 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-28 03:12:41,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-28 03:12:41,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 03:12:41,727 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:41,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:41,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1492369144, now seen corresponding path program 1 times [2021-12-28 03:12:41,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 03:12:41,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1391529783] [2021-12-28 03:12:41,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:41,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 03:12:41,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 03:12:41,731 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 03:12:41,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-28 03:12:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:42,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:12:42,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 03:12:42,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:12:42,582 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 03:12:42,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1391529783] [2021-12-28 03:12:42,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1391529783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:12:42,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:12:42,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:12:42,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170585308] [2021-12-28 03:12:42,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:12:42,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:12:42,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 03:12:42,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:12:42,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:12:42,584 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 03:12:42,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:42,652 INFO L93 Difference]: Finished difference Result 189 states and 231 transitions. [2021-12-28 03:12:42,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:12:42,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2021-12-28 03:12:42,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:42,658 INFO L225 Difference]: With dead ends: 189 [2021-12-28 03:12:42,658 INFO L226 Difference]: Without dead ends: 114 [2021-12-28 03:12:42,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:12:42,659 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 10 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:42,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 377 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:12:42,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-28 03:12:42,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2021-12-28 03:12:42,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 75 states have (on average 1.2) internal successors, (90), 76 states have internal predecessors, (90), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-12-28 03:12:42,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2021-12-28 03:12:42,667 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 86 [2021-12-28 03:12:42,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:42,667 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2021-12-28 03:12:42,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 03:12:42,668 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2021-12-28 03:12:42,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-28 03:12:42,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:42,669 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-28 03:12:42,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-28 03:12:42,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 03:12:42,869 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:42,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:42,870 INFO L85 PathProgramCache]: Analyzing trace with hash 874325450, now seen corresponding path program 1 times [2021-12-28 03:12:42,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 03:12:42,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857751654] [2021-12-28 03:12:42,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:42,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 03:12:42,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 03:12:42,873 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 03:12:42,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-28 03:12:43,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:43,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 03:12:43,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 03:12:43,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:12:43,778 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 03:12:43,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857751654] [2021-12-28 03:12:43,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857751654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:12:43,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:12:43,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:12:43,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987358193] [2021-12-28 03:12:43,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:12:43,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:12:43,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 03:12:43,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:12:43,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:12:43,780 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 03:12:43,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:43,852 INFO L93 Difference]: Finished difference Result 193 states and 233 transitions. [2021-12-28 03:12:43,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 03:12:43,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2021-12-28 03:12:43,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:43,854 INFO L225 Difference]: With dead ends: 193 [2021-12-28 03:12:43,854 INFO L226 Difference]: Without dead ends: 116 [2021-12-28 03:12:43,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:12:43,855 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 7 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:43,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 370 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:12:43,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-28 03:12:43,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-12-28 03:12:43,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-12-28 03:12:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 135 transitions. [2021-12-28 03:12:43,862 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 135 transitions. Word has length 86 [2021-12-28 03:12:43,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:43,862 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 135 transitions. [2021-12-28 03:12:43,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 03:12:43,862 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 135 transitions. [2021-12-28 03:12:43,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-28 03:12:43,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:43,863 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-28 03:12:43,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-28 03:12:44,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 03:12:44,092 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:44,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:44,093 INFO L85 PathProgramCache]: Analyzing trace with hash 261547704, now seen corresponding path program 1 times [2021-12-28 03:12:44,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 03:12:44,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418956243] [2021-12-28 03:12:44,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:44,094 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 03:12:44,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 03:12:44,095 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 03:12:44,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-28 03:12:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:44,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 1314 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 03:12:44,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 03:12:44,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:12:44,954 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 03:12:44,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418956243] [2021-12-28 03:12:44,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418956243] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:12:44,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:12:44,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:12:44,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191944215] [2021-12-28 03:12:44,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:12:44,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:12:44,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 03:12:44,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:12:44,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:12:44,955 INFO L87 Difference]: Start difference. First operand 112 states and 135 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 03:12:44,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:44,995 INFO L93 Difference]: Finished difference Result 160 states and 195 transitions. [2021-12-28 03:12:44,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 03:12:44,995 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2021-12-28 03:12:44,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:44,997 INFO L225 Difference]: With dead ends: 160 [2021-12-28 03:12:44,997 INFO L226 Difference]: Without dead ends: 120 [2021-12-28 03:12:44,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:12:44,998 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 4 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:44,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 515 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:12:44,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-28 03:12:45,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2021-12-28 03:12:45,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 80 states have internal predecessors, (94), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (24), 22 states have call predecessors, (24), 21 states have call successors, (24) [2021-12-28 03:12:45,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 140 transitions. [2021-12-28 03:12:45,006 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 140 transitions. Word has length 86 [2021-12-28 03:12:45,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:45,006 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 140 transitions. [2021-12-28 03:12:45,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 03:12:45,006 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 140 transitions. [2021-12-28 03:12:45,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-28 03:12:45,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:45,007 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:12:45,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-28 03:12:45,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 03:12:45,219 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:45,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:45,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2061885074, now seen corresponding path program 1 times [2021-12-28 03:12:45,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 03:12:45,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243016752] [2021-12-28 03:12:45,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:45,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 03:12:45,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 03:12:45,222 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 03:12:45,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-28 03:12:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:45,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 03:12:45,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:46,161 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 03:12:46,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:12:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-28 03:12:46,446 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 03:12:46,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243016752] [2021-12-28 03:12:46,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243016752] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:12:46,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:12:46,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-28 03:12:46,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107811210] [2021-12-28 03:12:46,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:12:46,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:12:46,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 03:12:46,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:12:46,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:12:46,448 INFO L87 Difference]: Start difference. First operand 116 states and 140 transitions. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-28 03:12:46,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:46,674 INFO L93 Difference]: Finished difference Result 214 states and 262 transitions. [2021-12-28 03:12:46,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:12:46,675 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 89 [2021-12-28 03:12:46,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:46,676 INFO L225 Difference]: With dead ends: 214 [2021-12-28 03:12:46,676 INFO L226 Difference]: Without dead ends: 131 [2021-12-28 03:12:46,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:12:46,677 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 28 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:46,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 743 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:12:46,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-28 03:12:46,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2021-12-28 03:12:46,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 89 states have internal predecessors, (106), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (24), 22 states have call predecessors, (24), 21 states have call successors, (24) [2021-12-28 03:12:46,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 152 transitions. [2021-12-28 03:12:46,683 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 152 transitions. Word has length 89 [2021-12-28 03:12:46,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:46,684 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 152 transitions. [2021-12-28 03:12:46,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-28 03:12:46,684 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 152 transitions. [2021-12-28 03:12:46,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-28 03:12:46,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:46,685 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-28 03:12:46,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-28 03:12:46,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 03:12:46,903 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:46,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:46,904 INFO L85 PathProgramCache]: Analyzing trace with hash -932359201, now seen corresponding path program 1 times [2021-12-28 03:12:46,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 03:12:46,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [856454248] [2021-12-28 03:12:46,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:46,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 03:12:46,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 03:12:46,906 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 03:12:46,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-28 03:12:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:47,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1336 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 03:12:47,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 03:12:47,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:12:47,827 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 03:12:47,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [856454248] [2021-12-28 03:12:47,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [856454248] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:12:47,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:12:47,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 03:12:47,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608173233] [2021-12-28 03:12:47,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:12:47,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:12:47,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 03:12:47,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:12:47,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:12:47,828 INFO L87 Difference]: Start difference. First operand 125 states and 152 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-28 03:12:48,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:48,034 INFO L93 Difference]: Finished difference Result 177 states and 214 transitions. [2021-12-28 03:12:48,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 03:12:48,034 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 92 [2021-12-28 03:12:48,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:48,036 INFO L225 Difference]: With dead ends: 177 [2021-12-28 03:12:48,036 INFO L226 Difference]: Without dead ends: 123 [2021-12-28 03:12:48,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:12:48,036 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 46 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:48,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 515 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:12:48,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-28 03:12:48,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-12-28 03:12:48,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 87 states have (on average 1.1954022988505748) internal successors, (104), 87 states have internal predecessors, (104), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-28 03:12:48,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 149 transitions. [2021-12-28 03:12:48,046 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 149 transitions. Word has length 92 [2021-12-28 03:12:48,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:48,046 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 149 transitions. [2021-12-28 03:12:48,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-28 03:12:48,047 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 149 transitions. [2021-12-28 03:12:48,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-28 03:12:48,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:48,048 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-28 03:12:48,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-28 03:12:48,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 03:12:48,262 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:48,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:48,262 INFO L85 PathProgramCache]: Analyzing trace with hash -778390853, now seen corresponding path program 1 times [2021-12-28 03:12:48,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 03:12:48,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173186997] [2021-12-28 03:12:48,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:48,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 03:12:48,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 03:12:48,264 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 03:12:48,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-28 03:12:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:49,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 1448 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:12:49,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-28 03:12:49,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:12:49,202 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 03:12:49,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173186997] [2021-12-28 03:12:49,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173186997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:12:49,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:12:49,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:12:49,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258712495] [2021-12-28 03:12:49,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:12:49,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:12:49,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 03:12:49,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:12:49,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:12:49,204 INFO L87 Difference]: Start difference. First operand 123 states and 149 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-28 03:12:49,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:49,227 INFO L93 Difference]: Finished difference Result 154 states and 185 transitions. [2021-12-28 03:12:49,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 03:12:49,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 107 [2021-12-28 03:12:49,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:49,229 INFO L225 Difference]: With dead ends: 154 [2021-12-28 03:12:49,229 INFO L226 Difference]: Without dead ends: 124 [2021-12-28 03:12:49,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:12:49,230 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 2 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:49,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 379 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:12:49,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-28 03:12:49,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-28 03:12:49,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 88 states have internal predecessors, (105), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-28 03:12:49,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 150 transitions. [2021-12-28 03:12:49,235 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 150 transitions. Word has length 107 [2021-12-28 03:12:49,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:49,235 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 150 transitions. [2021-12-28 03:12:49,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-28 03:12:49,235 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 150 transitions. [2021-12-28 03:12:49,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-28 03:12:49,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:49,236 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-28 03:12:49,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-28 03:12:49,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 03:12:49,437 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:49,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:49,437 INFO L85 PathProgramCache]: Analyzing trace with hash 99295452, now seen corresponding path program 1 times [2021-12-28 03:12:49,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 03:12:49,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159079508] [2021-12-28 03:12:49,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:12:49,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 03:12:49,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 03:12:49,440 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 03:12:49,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-28 03:12:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:12:50,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 1459 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 03:12:50,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-28 03:12:50,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:12:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-28 03:12:50,636 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 03:12:50,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159079508] [2021-12-28 03:12:50,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159079508] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:12:50,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:12:50,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-28 03:12:50,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382588646] [2021-12-28 03:12:50,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:12:50,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:12:50,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 03:12:50,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:12:50,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:12:50,638 INFO L87 Difference]: Start difference. First operand 124 states and 150 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-28 03:12:50,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:50,742 INFO L93 Difference]: Finished difference Result 159 states and 192 transitions. [2021-12-28 03:12:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:12:50,744 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 108 [2021-12-28 03:12:50,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:50,745 INFO L225 Difference]: With dead ends: 159 [2021-12-28 03:12:50,745 INFO L226 Difference]: Without dead ends: 127 [2021-12-28 03:12:50,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:12:50,745 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 9 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:50,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 382 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:12:50,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-28 03:12:50,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-12-28 03:12:50,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 91 states have (on average 1.1868131868131868) internal successors, (108), 91 states have internal predecessors, (108), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-28 03:12:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2021-12-28 03:12:50,750 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 108 [2021-12-28 03:12:50,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:50,750 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2021-12-28 03:12:50,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-28 03:12:50,750 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2021-12-28 03:12:50,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-28 03:12:50,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:50,751 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-12-28 03:12:50,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-28 03:12:50,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 03:12:50,962 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:50,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:50,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1722436869, now seen corresponding path program 2 times [2021-12-28 03:12:50,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 03:12:50,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879111810] [2021-12-28 03:12:50,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:12:50,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 03:12:50,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 03:12:50,964 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 03:12:50,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-28 03:12:54,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:12:54,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:12:54,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 1492 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 03:12:54,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:12:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-28 03:12:54,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:12:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-28 03:12:54,823 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 03:12:54,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879111810] [2021-12-28 03:12:54,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879111810] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:12:54,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:12:54,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-28 03:12:54,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782814309] [2021-12-28 03:12:54,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:12:54,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 03:12:54,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 03:12:54,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 03:12:54,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-28 03:12:54,825 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-28 03:12:55,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:12:55,323 INFO L93 Difference]: Finished difference Result 165 states and 201 transitions. [2021-12-28 03:12:55,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 03:12:55,324 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2021-12-28 03:12:55,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:12:55,324 INFO L225 Difference]: With dead ends: 165 [2021-12-28 03:12:55,324 INFO L226 Difference]: Without dead ends: 133 [2021-12-28 03:12:55,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2021-12-28 03:12:55,325 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 30 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:12:55,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 760 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:12:55,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-28 03:12:55,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-12-28 03:12:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 97 states have (on average 1.175257731958763) internal successors, (114), 97 states have internal predecessors, (114), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-28 03:12:55,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 159 transitions. [2021-12-28 03:12:55,330 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 159 transitions. Word has length 111 [2021-12-28 03:12:55,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:12:55,330 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 159 transitions. [2021-12-28 03:12:55,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-28 03:12:55,330 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 159 transitions. [2021-12-28 03:12:55,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-28 03:12:55,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:12:55,331 INFO L514 BasicCegarLoop]: trace histogram [10, 4, 4, 4, 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] [2021-12-28 03:12:55,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-28 03:12:55,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 03:12:55,552 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:12:55,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:12:55,552 INFO L85 PathProgramCache]: Analyzing trace with hash 699283291, now seen corresponding path program 3 times [2021-12-28 03:12:55,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 03:12:55,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408784269] [2021-12-28 03:12:55,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 03:12:55,553 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 03:12:55,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 03:12:55,554 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 03:12:55,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process