./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_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 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:56:27,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:56:27,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:56:27,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:56:27,954 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:56:27,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:56:27,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:56:27,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:56:27,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:56:27,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:56:27,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:56:27,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:56:27,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:56:27,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:56:27,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:56:27,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:56:27,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:56:27,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:56:27,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:56:27,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:56:27,982 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:56:27,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:56:27,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:56:27,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:56:27,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:56:27,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:56:27,990 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:56:27,990 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:56:27,991 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:56:27,991 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:56:27,992 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:56:27,992 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:56:27,993 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:56:27,993 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:56:27,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:56:27,994 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:56:27,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:56:27,995 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:56:27,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:56:27,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:56:27,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:56:27,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:56:27,997 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-12 10:56:28,023 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:56:28,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:56:28,025 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:56:28,025 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:56:28,025 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:56:28,025 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:56:28,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:56:28,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:56:28,026 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:56:28,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:56:28,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:56:28,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:56:28,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:56:28,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:56:28,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:56:28,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:56:28,028 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:56:28,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:56:28,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:56:28,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:56:28,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:56:28,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:56:28,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:56:28,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:56:28,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:56:28,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:56:28,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:56:28,029 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:56:28,029 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:56:28,029 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:56:28,030 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d [2022-07-12 10:56:28,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:56:28,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:56:28,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:56:28,224 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:56:28,225 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:56:28,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2022-07-12 10:56:28,277 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5266edcbe/5cddf024f4b54d17ac623100b8813ee4/FLAG25c5529a5 [2022-07-12 10:56:28,752 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:56:28,753 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2022-07-12 10:56:28,785 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5266edcbe/5cddf024f4b54d17ac623100b8813ee4/FLAG25c5529a5 [2022-07-12 10:56:29,011 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5266edcbe/5cddf024f4b54d17ac623100b8813ee4 [2022-07-12 10:56:29,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:56:29,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:56:29,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:56:29,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:56:29,024 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:56:29,025 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:56:29" (1/1) ... [2022-07-12 10:56:29,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c2015f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:56:29, skipping insertion in model container [2022-07-12 10:56:29,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:56:29" (1/1) ... [2022-07-12 10:56:29,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:56:29,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:56:29,220 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_byte_buf_reserve_relative_harness.i[4503,4516] [2022-07-12 10:56:29,225 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_byte_buf_reserve_relative_harness.i[4563,4576] [2022-07-12 10:56:29,683 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:29,684 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:29,684 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:29,685 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:29,685 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:29,696 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:29,697 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:29,698 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:29,698 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:29,886 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-12 10:56:29,887 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-12 10:56:29,888 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-12 10:56:29,888 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-12 10:56:29,889 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-12 10:56:29,890 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-12 10:56:29,890 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-12 10:56:29,890 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-12 10:56:29,891 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-12 10:56:29,891 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-12 10:56:29,960 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-12 10:56:29,967 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:29,967 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:30,004 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:30,005 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:30,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:56:30,104 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:56:30,120 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_byte_buf_reserve_relative_harness.i[4503,4516] [2022-07-12 10:56:30,121 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_byte_buf_reserve_relative_harness.i[4563,4576] [2022-07-12 10:56:30,140 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:30,140 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:30,140 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:30,141 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:30,141 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:30,145 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:30,145 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:30,145 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:30,146 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:30,171 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-12 10:56:30,172 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-12 10:56:30,172 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-12 10:56:30,173 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-12 10:56:30,173 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-12 10:56:30,173 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-12 10:56:30,174 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-12 10:56:30,174 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-12 10:56:30,174 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-12 10:56:30,174 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-12 10:56:30,196 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-12 10:56:30,208 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:30,212 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:30,250 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:30,250 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:56:30,312 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:56:30,431 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:56:30,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:56:30 WrapperNode [2022-07-12 10:56:30,431 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:56:30,432 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:56:30,432 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:56:30,432 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:56:30,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:56:30" (1/1) ... [2022-07-12 10:56:30,495 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:56:30" (1/1) ... [2022-07-12 10:56:30,550 INFO L137 Inliner]: procedures = 692, calls = 2500, calls flagged for inlining = 57, calls inlined = 12, statements flattened = 1003 [2022-07-12 10:56:30,551 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:56:30,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:56:30,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:56:30,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:56:30,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:56:30" (1/1) ... [2022-07-12 10:56:30,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:56:30" (1/1) ... [2022-07-12 10:56:30,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:56:30" (1/1) ... [2022-07-12 10:56:30,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:56:30" (1/1) ... [2022-07-12 10:56:30,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:56:30" (1/1) ... [2022-07-12 10:56:30,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:56:30" (1/1) ... [2022-07-12 10:56:30,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:56:30" (1/1) ... [2022-07-12 10:56:30,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:56:30,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:56:30,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:56:30,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:56:30,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:56:30" (1/1) ... [2022-07-12 10:56:30,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:56:30,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:56:30,668 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 10:56:30,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 10:56:30,715 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-07-12 10:56:30,716 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-07-12 10:56:30,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:56:30,716 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-07-12 10:56:30,716 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-07-12 10:56:30,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:56:30,717 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-07-12 10:56:30,717 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-07-12 10:56:30,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-12 10:56:30,718 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-12 10:56:30,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:56:30,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:56:30,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 10:56:30,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:56:30,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:56:30,719 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-07-12 10:56:30,719 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-07-12 10:56:30,719 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_realloc [2022-07-12 10:56:30,719 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_realloc [2022-07-12 10:56:30,719 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2022-07-12 10:56:30,720 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2022-07-12 10:56:30,720 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-12 10:56:30,720 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-12 10:56:30,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:56:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2022-07-12 10:56:30,721 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2022-07-12 10:56:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 10:56:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 10:56:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-07-12 10:56:30,721 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-07-12 10:56:30,722 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2022-07-12 10:56:30,722 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2022-07-12 10:56:30,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:56:30,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:56:30,922 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:56:30,923 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:56:31,588 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:56:31,602 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:56:31,603 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-07-12 10:56:31,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:56:31 BoogieIcfgContainer [2022-07-12 10:56:31,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:56:31,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:56:31,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:56:31,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:56:31,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:56:29" (1/3) ... [2022-07-12 10:56:31,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3d8dee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:56:31, skipping insertion in model container [2022-07-12 10:56:31,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:56:30" (2/3) ... [2022-07-12 10:56:31,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3d8dee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:56:31, skipping insertion in model container [2022-07-12 10:56:31,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:56:31" (3/3) ... [2022-07-12 10:56:31,611 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reserve_relative_harness.i [2022-07-12 10:56:31,622 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:56:31,622 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:56:31,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:56:31,685 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5ccb13f9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b4061ea [2022-07-12 10:56:31,686 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 10:56:31,689 INFO L276 IsEmpty]: Start isEmpty. Operand has 160 states, 111 states have (on average 1.3153153153153154) internal successors, (146), 110 states have internal predecessors, (146), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-07-12 10:56:31,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 10:56:31,697 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:56:31,697 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 10:56:31,698 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:56:31,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:56:31,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1108355223, now seen corresponding path program 1 times [2022-07-12 10:56:31,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:56:31,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674616902] [2022-07-12 10:56:31,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:31,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:56:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:32,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:56:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:32,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:56:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:32,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:32,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:56:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:32,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-12 10:56:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:32,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-12 10:56:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 10:56:32,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:56:32,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674616902] [2022-07-12 10:56:32,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674616902] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:56:32,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:56:32,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:56:32,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125240195] [2022-07-12 10:56:32,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:56:32,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:56:32,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:56:32,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:56:32,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:56:32,279 INFO L87 Difference]: Start difference. First operand has 160 states, 111 states have (on average 1.3153153153153154) internal successors, (146), 110 states have internal predecessors, (146), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 10:56:32,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:56:32,565 INFO L93 Difference]: Finished difference Result 320 states and 455 transitions. [2022-07-12 10:56:32,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:56:32,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2022-07-12 10:56:32,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:56:32,590 INFO L225 Difference]: With dead ends: 320 [2022-07-12 10:56:32,590 INFO L226 Difference]: Without dead ends: 165 [2022-07-12 10:56:32,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:56:32,601 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 122 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 10:56:32,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 333 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 10:56:32,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-12 10:56:32,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 155. [2022-07-12 10:56:32,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 105 states have (on average 1.2571428571428571) internal successors, (132), 106 states have internal predecessors, (132), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-07-12 10:56:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 207 transitions. [2022-07-12 10:56:32,649 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 207 transitions. Word has length 46 [2022-07-12 10:56:32,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:56:32,650 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 207 transitions. [2022-07-12 10:56:32,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 10:56:32,651 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 207 transitions. [2022-07-12 10:56:32,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 10:56:32,653 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:56:32,653 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 10:56:32,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:56:32,653 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:56:32,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:56:32,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1165194515, now seen corresponding path program 1 times [2022-07-12 10:56:32,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:56:32,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614411786] [2022-07-12 10:56:32,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:32,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:56:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:32,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:56:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:32,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:56:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:32,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:32,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:32,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:56:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:32,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-12 10:56:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:32,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-12 10:56:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 10:56:32,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:56:32,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614411786] [2022-07-12 10:56:32,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614411786] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:56:32,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:56:32,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:56:32,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646997127] [2022-07-12 10:56:32,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:56:32,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:56:32,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:56:32,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:56:32,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:56:32,875 INFO L87 Difference]: Start difference. First operand 155 states and 207 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 10:56:33,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:56:33,254 INFO L93 Difference]: Finished difference Result 307 states and 413 transitions. [2022-07-12 10:56:33,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:56:33,255 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2022-07-12 10:56:33,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:56:33,256 INFO L225 Difference]: With dead ends: 307 [2022-07-12 10:56:33,256 INFO L226 Difference]: Without dead ends: 168 [2022-07-12 10:56:33,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:56:33,258 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 202 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 10:56:33,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 523 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 10:56:33,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-12 10:56:33,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 158. [2022-07-12 10:56:33,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 107 states have (on average 1.2523364485981308) internal successors, (134), 109 states have internal predecessors, (134), 38 states have call successors, (38), 11 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2022-07-12 10:56:33,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 215 transitions. [2022-07-12 10:56:33,267 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 215 transitions. Word has length 46 [2022-07-12 10:56:33,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:56:33,268 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 215 transitions. [2022-07-12 10:56:33,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 10:56:33,268 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 215 transitions. [2022-07-12 10:56:33,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 10:56:33,269 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:56:33,269 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 10:56:33,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:56:33,269 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:56:33,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:56:33,270 INFO L85 PathProgramCache]: Analyzing trace with hash 862482782, now seen corresponding path program 1 times [2022-07-12 10:56:33,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:56:33,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798450141] [2022-07-12 10:56:33,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:33,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:56:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:33,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:56:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:33,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:56:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:33,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:33,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:56:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:33,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-12 10:56:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:33,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-12 10:56:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 10:56:33,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:56:33,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798450141] [2022-07-12 10:56:33,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798450141] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:56:33,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:56:33,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:56:33,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324279126] [2022-07-12 10:56:33,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:56:33,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:56:33,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:56:33,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:56:33,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:56:33,454 INFO L87 Difference]: Start difference. First operand 158 states and 215 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 10:56:33,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:56:33,830 INFO L93 Difference]: Finished difference Result 210 states and 276 transitions. [2022-07-12 10:56:33,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:56:33,831 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 52 [2022-07-12 10:56:33,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:56:33,832 INFO L225 Difference]: With dead ends: 210 [2022-07-12 10:56:33,832 INFO L226 Difference]: Without dead ends: 172 [2022-07-12 10:56:33,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-12 10:56:33,833 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 125 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 10:56:33,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 699 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 10:56:33,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-12 10:56:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 160. [2022-07-12 10:56:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 111 states have internal predecessors, (136), 38 states have call successors, (38), 11 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2022-07-12 10:56:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2022-07-12 10:56:33,850 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 52 [2022-07-12 10:56:33,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:56:33,851 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2022-07-12 10:56:33,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 10:56:33,851 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2022-07-12 10:56:33,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-12 10:56:33,852 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:56:33,852 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 10:56:33,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:56:33,853 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:56:33,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:56:33,853 INFO L85 PathProgramCache]: Analyzing trace with hash 877723525, now seen corresponding path program 1 times [2022-07-12 10:56:33,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:56:33,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768878624] [2022-07-12 10:56:33,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:33,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:56:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:33,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:56:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:33,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:56:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:33,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:33,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:56:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:34,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-12 10:56:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:34,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-12 10:56:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:34,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-12 10:56:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:56:34,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:56:34,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768878624] [2022-07-12 10:56:34,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768878624] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:56:34,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546907852] [2022-07-12 10:56:34,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:34,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:56:34,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:56:34,068 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:56:34,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:56:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:34,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 2471 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 10:56:34,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:56:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:56:34,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:56:34,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546907852] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:56:34,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:56:34,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2022-07-12 10:56:34,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735705479] [2022-07-12 10:56:34,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:56:34,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:56:34,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:56:34,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:56:34,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-07-12 10:56:34,475 INFO L87 Difference]: Start difference. First operand 160 states and 217 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-12 10:56:34,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:56:34,508 INFO L93 Difference]: Finished difference Result 204 states and 270 transitions. [2022-07-12 10:56:34,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:56:34,508 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 60 [2022-07-12 10:56:34,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:56:34,510 INFO L225 Difference]: With dead ends: 204 [2022-07-12 10:56:34,510 INFO L226 Difference]: Without dead ends: 166 [2022-07-12 10:56:34,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-07-12 10:56:34,511 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 3 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 10:56:34,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1024 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 10:56:34,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-12 10:56:34,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2022-07-12 10:56:34,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 111 states have internal predecessors, (136), 38 states have call successors, (38), 11 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2022-07-12 10:56:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2022-07-12 10:56:34,518 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 60 [2022-07-12 10:56:34,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:56:34,519 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2022-07-12 10:56:34,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-12 10:56:34,519 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2022-07-12 10:56:34,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-12 10:56:34,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:56:34,520 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 10:56:34,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:56:34,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:56:34,736 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:56:34,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:56:34,736 INFO L85 PathProgramCache]: Analyzing trace with hash -268177860, now seen corresponding path program 1 times [2022-07-12 10:56:34,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:56:34,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133889116] [2022-07-12 10:56:34,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:34,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:56:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:34,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:56:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:34,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:56:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:34,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:34,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:56:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:34,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-12 10:56:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:34,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-12 10:56:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:34,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-12 10:56:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 10:56:34,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:56:34,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133889116] [2022-07-12 10:56:34,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133889116] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:56:34,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:56:34,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-12 10:56:34,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194483895] [2022-07-12 10:56:34,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:56:34,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:56:34,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:56:34,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:56:34,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:56:34,996 INFO L87 Difference]: Start difference. First operand 160 states and 217 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-12 10:56:35,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:56:35,468 INFO L93 Difference]: Finished difference Result 181 states and 244 transitions. [2022-07-12 10:56:35,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:56:35,469 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 64 [2022-07-12 10:56:35,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:56:35,470 INFO L225 Difference]: With dead ends: 181 [2022-07-12 10:56:35,470 INFO L226 Difference]: Without dead ends: 174 [2022-07-12 10:56:35,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-07-12 10:56:35,471 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 144 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 10:56:35,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 921 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 10:56:35,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-07-12 10:56:35,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 164. [2022-07-12 10:56:35,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 115 states have internal predecessors, (139), 38 states have call successors, (38), 11 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2022-07-12 10:56:35,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 227 transitions. [2022-07-12 10:56:35,477 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 227 transitions. Word has length 64 [2022-07-12 10:56:35,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:56:35,477 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 227 transitions. [2022-07-12 10:56:35,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-12 10:56:35,477 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 227 transitions. [2022-07-12 10:56:35,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-12 10:56:35,478 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:56:35,478 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 10:56:35,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:56:35,478 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:56:35,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:56:35,479 INFO L85 PathProgramCache]: Analyzing trace with hash 7549444, now seen corresponding path program 1 times [2022-07-12 10:56:35,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:56:35,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675873819] [2022-07-12 10:56:35,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:35,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:56:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:35,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:56:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:35,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:56:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:35,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:35,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:56:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:35,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-12 10:56:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:35,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-12 10:56:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:35,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-12 10:56:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 10:56:35,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:56:35,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675873819] [2022-07-12 10:56:35,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675873819] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:56:35,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:56:35,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:56:35,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418408438] [2022-07-12 10:56:35,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:56:35,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:56:35,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:56:35,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:56:35,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:56:35,716 INFO L87 Difference]: Start difference. First operand 164 states and 227 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-12 10:56:36,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:56:36,209 INFO L93 Difference]: Finished difference Result 347 states and 495 transitions. [2022-07-12 10:56:36,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:56:36,209 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 68 [2022-07-12 10:56:36,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:56:36,211 INFO L225 Difference]: With dead ends: 347 [2022-07-12 10:56:36,211 INFO L226 Difference]: Without dead ends: 199 [2022-07-12 10:56:36,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-07-12 10:56:36,212 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 201 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 10:56:36,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 599 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 10:56:36,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-12 10:56:36,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 169. [2022-07-12 10:56:36,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 117 states have (on average 1.2478632478632479) internal successors, (146), 120 states have internal predecessors, (146), 38 states have call successors, (38), 11 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2022-07-12 10:56:36,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 234 transitions. [2022-07-12 10:56:36,221 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 234 transitions. Word has length 68 [2022-07-12 10:56:36,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:56:36,231 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 234 transitions. [2022-07-12 10:56:36,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-12 10:56:36,231 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 234 transitions. [2022-07-12 10:56:36,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-12 10:56:36,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:56:36,232 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 10:56:36,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:56:36,232 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:56:36,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:56:36,233 INFO L85 PathProgramCache]: Analyzing trace with hash 265714882, now seen corresponding path program 1 times [2022-07-12 10:56:36,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:56:36,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746077736] [2022-07-12 10:56:36,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:36,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:56:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:36,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:56:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:36,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:56:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:36,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:36,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:56:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:36,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-12 10:56:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:36,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-12 10:56:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:36,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-12 10:56:36,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:56:36,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:56:36,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746077736] [2022-07-12 10:56:36,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746077736] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:56:36,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479237266] [2022-07-12 10:56:36,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:36,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:56:36,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:56:36,585 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:56:36,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:56:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:36,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 2490 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 10:56:36,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:56:37,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 10:56:37,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 10:56:37,202 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-07-12 10:56:37,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 1 [2022-07-12 10:56:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:56:37,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:56:37,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479237266] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:56:37,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:56:37,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 17 [2022-07-12 10:56:37,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230516638] [2022-07-12 10:56:37,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:56:37,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 10:56:37,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:56:37,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 10:56:37,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-07-12 10:56:37,206 INFO L87 Difference]: Start difference. First operand 169 states and 234 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-12 10:56:37,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:56:37,283 INFO L93 Difference]: Finished difference Result 348 states and 478 transitions. [2022-07-12 10:56:37,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:56:37,283 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 68 [2022-07-12 10:56:37,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:56:37,284 INFO L225 Difference]: With dead ends: 348 [2022-07-12 10:56:37,285 INFO L226 Difference]: Without dead ends: 188 [2022-07-12 10:56:37,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:56:37,286 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 22 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1485 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 10:56:37,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1485 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2022-07-12 10:56:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-12 10:56:37,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 185. [2022-07-12 10:56:37,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 133 states have (on average 1.255639097744361) internal successors, (167), 135 states have internal predecessors, (167), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (44), 37 states have call predecessors, (44), 37 states have call successors, (44) [2022-07-12 10:56:37,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 249 transitions. [2022-07-12 10:56:37,293 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 249 transitions. Word has length 68 [2022-07-12 10:56:37,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:56:37,293 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 249 transitions. [2022-07-12 10:56:37,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-12 10:56:37,293 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 249 transitions. [2022-07-12 10:56:37,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-12 10:56:37,294 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:56:37,294 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 10:56:37,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:56:37,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-12 10:56:37,520 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:56:37,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:56:37,520 INFO L85 PathProgramCache]: Analyzing trace with hash -631678396, now seen corresponding path program 1 times [2022-07-12 10:56:37,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:56:37,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335825008] [2022-07-12 10:56:37,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:37,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:56:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:37,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:56:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:37,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:56:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:37,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:37,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:56:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:37,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-12 10:56:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:37,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-12 10:56:37,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:37,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-12 10:56:37,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:56:37,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:56:37,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335825008] [2022-07-12 10:56:37,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335825008] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:56:37,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438511111] [2022-07-12 10:56:37,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:37,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:56:37,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:56:37,640 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:56:37,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:56:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:37,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 2485 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 10:56:37,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:56:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 10:56:37,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:56:37,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438511111] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:56:37,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:56:37,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-07-12 10:56:37,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359643134] [2022-07-12 10:56:37,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:56:37,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:56:37,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:56:37,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:56:37,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:56:37,973 INFO L87 Difference]: Start difference. First operand 185 states and 249 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-12 10:56:37,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:56:37,990 INFO L93 Difference]: Finished difference Result 348 states and 477 transitions. [2022-07-12 10:56:37,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:56:37,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2022-07-12 10:56:37,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:56:37,992 INFO L225 Difference]: With dead ends: 348 [2022-07-12 10:56:37,992 INFO L226 Difference]: Without dead ends: 194 [2022-07-12 10:56:37,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:56:37,993 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 20 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 10:56:37,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 613 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 10:56:37,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-12 10:56:37,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 177. [2022-07-12 10:56:37,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 126 states have (on average 1.253968253968254) internal successors, (158), 127 states have internal predecessors, (158), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2022-07-12 10:56:37,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 239 transitions. [2022-07-12 10:56:38,012 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 239 transitions. Word has length 68 [2022-07-12 10:56:38,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:56:38,013 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 239 transitions. [2022-07-12 10:56:38,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-12 10:56:38,013 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 239 transitions. [2022-07-12 10:56:38,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-12 10:56:38,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:56:38,014 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 10:56:38,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:56:38,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:56:38,232 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:56:38,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:56:38,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1530819000, now seen corresponding path program 1 times [2022-07-12 10:56:38,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:56:38,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144345126] [2022-07-12 10:56:38,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:38,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:56:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:38,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:56:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:38,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:56:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:38,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:38,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:56:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:38,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 10:56:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:38,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-12 10:56:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:38,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 10:56:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 10:56:38,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:56:38,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144345126] [2022-07-12 10:56:38,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144345126] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:56:38,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203817521] [2022-07-12 10:56:38,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:38,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:56:38,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:56:38,407 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:56:38,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:56:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:38,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 2497 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 10:56:38,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:56:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:56:38,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:56:38,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203817521] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:56:38,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:56:38,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 12 [2022-07-12 10:56:38,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145604148] [2022-07-12 10:56:38,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:56:38,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 10:56:38,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:56:38,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 10:56:38,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-07-12 10:56:38,801 INFO L87 Difference]: Start difference. First operand 177 states and 239 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-12 10:56:38,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:56:38,917 INFO L93 Difference]: Finished difference Result 339 states and 467 transitions. [2022-07-12 10:56:38,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:56:38,918 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 72 [2022-07-12 10:56:38,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:56:38,919 INFO L225 Difference]: With dead ends: 339 [2022-07-12 10:56:38,919 INFO L226 Difference]: Without dead ends: 185 [2022-07-12 10:56:38,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-07-12 10:56:38,921 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 12 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 10:56:38,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1518 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 10:56:38,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-12 10:56:38,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2022-07-12 10:56:38,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 130 states have (on average 1.2461538461538462) internal successors, (162), 132 states have internal predecessors, (162), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2022-07-12 10:56:38,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 250 transitions. [2022-07-12 10:56:38,930 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 250 transitions. Word has length 72 [2022-07-12 10:56:38,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:56:38,931 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 250 transitions. [2022-07-12 10:56:38,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-12 10:56:38,931 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 250 transitions. [2022-07-12 10:56:38,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-12 10:56:38,932 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:56:38,932 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 10:56:38,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-12 10:56:39,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:56:39,147 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:56:39,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:56:39,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1019185037, now seen corresponding path program 1 times [2022-07-12 10:56:39,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:56:39,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326900548] [2022-07-12 10:56:39,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:39,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:56:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:39,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:56:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:39,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:56:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:39,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:39,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:56:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:39,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-12 10:56:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:39,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 10:56:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:39,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-12 10:56:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 10:56:39,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:56:39,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326900548] [2022-07-12 10:56:39,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326900548] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:56:39,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796824729] [2022-07-12 10:56:39,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:39,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:56:39,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:56:39,295 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:56:39,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:56:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:39,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 2502 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 10:56:39,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:56:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:56:39,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:56:39,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796824729] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:56:39,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:56:39,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-07-12 10:56:39,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864318188] [2022-07-12 10:56:39,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:56:39,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:56:39,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:56:39,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:56:39,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:56:39,631 INFO L87 Difference]: Start difference. First operand 182 states and 250 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-12 10:56:39,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:56:39,650 INFO L93 Difference]: Finished difference Result 346 states and 483 transitions. [2022-07-12 10:56:39,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:56:39,651 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2022-07-12 10:56:39,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:56:39,652 INFO L225 Difference]: With dead ends: 346 [2022-07-12 10:56:39,652 INFO L226 Difference]: Without dead ends: 185 [2022-07-12 10:56:39,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:56:39,653 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 9 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 606 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 [2022-07-12 10:56:39,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 606 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 10:56:39,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-12 10:56:39,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2022-07-12 10:56:39,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 130 states have (on average 1.2307692307692308) internal successors, (160), 132 states have internal predecessors, (160), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2022-07-12 10:56:39,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 248 transitions. [2022-07-12 10:56:39,659 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 248 transitions. Word has length 74 [2022-07-12 10:56:39,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:56:39,659 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 248 transitions. [2022-07-12 10:56:39,659 INFO L496 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-12 10:56:39,659 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 248 transitions. [2022-07-12 10:56:39,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-12 10:56:39,660 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:56:39,660 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 10:56:39,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:56:39,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-12 10:56:39,879 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:56:39,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:56:39,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1357293521, now seen corresponding path program 1 times [2022-07-12 10:56:39,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:56:39,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834676460] [2022-07-12 10:56:39,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:39,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:56:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:39,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:56:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:39,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:56:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:39,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:39,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:56:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:39,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-12 10:56:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:39,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 10:56:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:39,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-12 10:56:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 10:56:39,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:56:39,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834676460] [2022-07-12 10:56:39,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834676460] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:56:39,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912962338] [2022-07-12 10:56:39,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:39,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:56:39,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:56:39,989 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:56:39,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:56:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:40,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 10:56:40,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:56:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 10:56:40,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:56:40,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912962338] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:56:40,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:56:40,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-07-12 10:56:40,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646439529] [2022-07-12 10:56:40,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:56:40,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:56:40,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:56:40,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:56:40,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:56:40,334 INFO L87 Difference]: Start difference. First operand 182 states and 248 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-12 10:56:40,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:56:40,354 INFO L93 Difference]: Finished difference Result 352 states and 498 transitions. [2022-07-12 10:56:40,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:56:40,355 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2022-07-12 10:56:40,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:56:40,356 INFO L225 Difference]: With dead ends: 352 [2022-07-12 10:56:40,356 INFO L226 Difference]: Without dead ends: 191 [2022-07-12 10:56:40,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:56:40,357 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 34 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 10:56:40,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 604 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 10:56:40,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-07-12 10:56:40,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 178. [2022-07-12 10:56:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 126 states have (on average 1.2142857142857142) internal successors, (153), 128 states have internal predecessors, (153), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2022-07-12 10:56:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 241 transitions. [2022-07-12 10:56:40,367 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 241 transitions. Word has length 74 [2022-07-12 10:56:40,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:56:40,367 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 241 transitions. [2022-07-12 10:56:40,367 INFO L496 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-12 10:56:40,367 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 241 transitions. [2022-07-12 10:56:40,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-12 10:56:40,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:56:40,368 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 10:56:40,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:56:40,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:56:40,588 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:56:40,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:56:40,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1341774803, now seen corresponding path program 1 times [2022-07-12 10:56:40,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:56:40,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670104880] [2022-07-12 10:56:40,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:40,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:56:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:41,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:56:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:41,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:56:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:41,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:41,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:56:41,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:41,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-12 10:56:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:41,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 10:56:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:41,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-12 10:56:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 10:56:41,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:56:41,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670104880] [2022-07-12 10:56:41,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670104880] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:56:41,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107105905] [2022-07-12 10:56:41,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:41,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:56:41,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:56:41,573 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:56:41,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:56:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:41,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 2499 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-12 10:56:41,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:56:41,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 10:56:42,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 10:56:42,425 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-07-12 10:56:42,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 1 [2022-07-12 10:56:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:56:42,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:56:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:56:42,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107105905] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:56:42,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:56:42,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 9] total 28 [2022-07-12 10:56:42,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353341313] [2022-07-12 10:56:42,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:56:42,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 10:56:42,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:56:42,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 10:56:42,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-07-12 10:56:42,701 INFO L87 Difference]: Start difference. First operand 178 states and 241 transitions. Second operand has 28 states, 27 states have (on average 4.62962962962963) internal successors, (125), 26 states have internal predecessors, (125), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-07-12 10:56:44,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:56:44,335 INFO L93 Difference]: Finished difference Result 263 states and 339 transitions. [2022-07-12 10:56:44,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 10:56:44,336 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.62962962962963) internal successors, (125), 26 states have internal predecessors, (125), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 74 [2022-07-12 10:56:44,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:56:44,337 INFO L225 Difference]: With dead ends: 263 [2022-07-12 10:56:44,337 INFO L226 Difference]: Without dead ends: 235 [2022-07-12 10:56:44,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 10:56:44,338 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 430 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 1889 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 1408 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 481 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 10:56:44,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 1408 Invalid, 2484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1889 Invalid, 0 Unknown, 481 Unchecked, 1.1s Time] [2022-07-12 10:56:44,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-07-12 10:56:44,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2022-07-12 10:56:44,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 152 states have (on average 1.1973684210526316) internal successors, (182), 155 states have internal predecessors, (182), 39 states have call successors, (39), 15 states have call predecessors, (39), 16 states have return successors, (51), 37 states have call predecessors, (51), 38 states have call successors, (51) [2022-07-12 10:56:44,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 272 transitions. [2022-07-12 10:56:44,347 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 272 transitions. Word has length 74 [2022-07-12 10:56:44,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:56:44,347 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 272 transitions. [2022-07-12 10:56:44,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.62962962962963) internal successors, (125), 26 states have internal predecessors, (125), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-07-12 10:56:44,347 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 272 transitions. [2022-07-12 10:56:44,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-12 10:56:44,348 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:56:44,348 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 10:56:44,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-12 10:56:44,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:56:44,563 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:56:44,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:56:44,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1784602215, now seen corresponding path program 1 times [2022-07-12 10:56:44,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:56:44,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517670371] [2022-07-12 10:56:44,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:44,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:56:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:44,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:56:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:44,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:56:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:44,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:44,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:56:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:44,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-12 10:56:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:44,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 10:56:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:44,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-12 10:56:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 10:56:44,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:56:44,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517670371] [2022-07-12 10:56:44,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517670371] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:56:44,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199918180] [2022-07-12 10:56:44,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:44,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:56:44,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:56:44,919 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:56:44,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 10:56:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:45,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 2496 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-12 10:56:45,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:56:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:56:45,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:56:46,360 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-12 10:56:46,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 1 [2022-07-12 10:56:46,503 INFO L356 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2022-07-12 10:56:46,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2022-07-12 10:56:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:56:46,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199918180] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:56:46,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:56:46,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 34 [2022-07-12 10:56:46,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487834515] [2022-07-12 10:56:46,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:56:46,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:56:46,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:56:46,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:56:46,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:56:46,596 INFO L87 Difference]: Start difference. First operand 208 states and 272 transitions. Second operand has 34 states, 34 states have (on average 3.588235294117647) internal successors, (122), 32 states have internal predecessors, (122), 6 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-07-12 10:56:48,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:56:48,551 INFO L93 Difference]: Finished difference Result 305 states and 410 transitions. [2022-07-12 10:56:48,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 10:56:48,551 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.588235294117647) internal successors, (122), 32 states have internal predecessors, (122), 6 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) Word has length 74 [2022-07-12 10:56:48,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:56:48,553 INFO L225 Difference]: With dead ends: 305 [2022-07-12 10:56:48,553 INFO L226 Difference]: Without dead ends: 293 [2022-07-12 10:56:48,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=542, Invalid=2880, Unknown=0, NotChecked=0, Total=3422 [2022-07-12 10:56:48,554 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 370 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 10:56:48,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 1380 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1590 Invalid, 0 Unknown, 342 Unchecked, 1.0s Time] [2022-07-12 10:56:48,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-07-12 10:56:48,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 252. [2022-07-12 10:56:48,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 187 states have (on average 1.1764705882352942) internal successors, (220), 191 states have internal predecessors, (220), 44 states have call successors, (44), 18 states have call predecessors, (44), 20 states have return successors, (68), 42 states have call predecessors, (68), 43 states have call successors, (68) [2022-07-12 10:56:48,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 332 transitions. [2022-07-12 10:56:48,569 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 332 transitions. Word has length 74 [2022-07-12 10:56:48,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:56:48,570 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 332 transitions. [2022-07-12 10:56:48,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.588235294117647) internal successors, (122), 32 states have internal predecessors, (122), 6 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-07-12 10:56:48,570 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 332 transitions. [2022-07-12 10:56:48,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-12 10:56:48,571 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:56:48,571 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 10:56:48,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-12 10:56:48,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-12 10:56:48,785 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:56:48,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:56:48,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1526436777, now seen corresponding path program 1 times [2022-07-12 10:56:48,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:56:48,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31778555] [2022-07-12 10:56:48,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:48,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:56:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:48,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:56:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:48,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:56:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:48,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:48,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:56:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:48,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-12 10:56:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:48,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 10:56:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:48,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-12 10:56:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 10:56:48,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:56:48,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31778555] [2022-07-12 10:56:48,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31778555] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:56:48,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:56:48,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:56:48,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92216703] [2022-07-12 10:56:48,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:56:48,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:56:48,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:56:48,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:56:48,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:56:48,940 INFO L87 Difference]: Start difference. First operand 252 states and 332 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-12 10:56:49,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:56:49,262 INFO L93 Difference]: Finished difference Result 466 states and 627 transitions. [2022-07-12 10:56:49,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:56:49,263 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 74 [2022-07-12 10:56:49,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:56:49,265 INFO L225 Difference]: With dead ends: 466 [2022-07-12 10:56:49,265 INFO L226 Difference]: Without dead ends: 265 [2022-07-12 10:56:49,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-12 10:56:49,268 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 164 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 10:56:49,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 510 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 10:56:49,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-07-12 10:56:49,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 250. [2022-07-12 10:56:49,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 185 states have (on average 1.162162162162162) internal successors, (215), 189 states have internal predecessors, (215), 44 states have call successors, (44), 18 states have call predecessors, (44), 20 states have return successors, (68), 42 states have call predecessors, (68), 43 states have call successors, (68) [2022-07-12 10:56:49,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 327 transitions. [2022-07-12 10:56:49,283 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 327 transitions. Word has length 74 [2022-07-12 10:56:49,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:56:49,283 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 327 transitions. [2022-07-12 10:56:49,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-12 10:56:49,284 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 327 transitions. [2022-07-12 10:56:49,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-12 10:56:49,287 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:56:49,287 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 10:56:49,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 10:56:49,288 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:56:49,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:56:49,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1612971803, now seen corresponding path program 1 times [2022-07-12 10:56:49,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:56:49,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406872075] [2022-07-12 10:56:49,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:49,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:56:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:49,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:56:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:49,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:56:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:49,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:49,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:56:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:49,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-12 10:56:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:49,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 10:56:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:49,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-12 10:56:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:50,041 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 10:56:50,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:56:50,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406872075] [2022-07-12 10:56:50,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406872075] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:56:50,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804581228] [2022-07-12 10:56:50,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:50,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:56:50,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:56:50,043 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:56:50,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 10:56:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:50,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 2501 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-12 10:56:50,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:56:50,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 10:56:51,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 10:56:51,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:56:51,109 INFO L356 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-07-12 10:56:51,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 1 [2022-07-12 10:56:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:56:51,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:56:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:56:51,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804581228] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:56:51,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:56:51,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 11] total 33 [2022-07-12 10:56:51,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895995155] [2022-07-12 10:56:51,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:56:51,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:56:51,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:56:51,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:56:51,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:56:51,665 INFO L87 Difference]: Start difference. First operand 250 states and 327 transitions. Second operand has 33 states, 32 states have (on average 3.9375) internal successors, (126), 31 states have internal predecessors, (126), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-07-12 10:56:53,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:56:53,992 INFO L93 Difference]: Finished difference Result 278 states and 361 transitions. [2022-07-12 10:56:53,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 10:56:53,993 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.9375) internal successors, (126), 31 states have internal predecessors, (126), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 74 [2022-07-12 10:56:53,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:56:53,996 INFO L225 Difference]: With dead ends: 278 [2022-07-12 10:56:53,996 INFO L226 Difference]: Without dead ends: 266 [2022-07-12 10:56:53,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=475, Invalid=2281, Unknown=0, NotChecked=0, Total=2756 [2022-07-12 10:56:53,999 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 343 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1610 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 539 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-12 10:56:54,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 1610 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2274 Invalid, 0 Unknown, 539 Unchecked, 1.5s Time] [2022-07-12 10:56:54,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-12 10:56:54,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 240. [2022-07-12 10:56:54,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 175 states have (on average 1.1657142857142857) internal successors, (204), 180 states have internal predecessors, (204), 44 states have call successors, (44), 17 states have call predecessors, (44), 20 states have return successors, (68), 42 states have call predecessors, (68), 43 states have call successors, (68) [2022-07-12 10:56:54,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 316 transitions. [2022-07-12 10:56:54,014 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 316 transitions. Word has length 74 [2022-07-12 10:56:54,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:56:54,014 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 316 transitions. [2022-07-12 10:56:54,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.9375) internal successors, (126), 31 states have internal predecessors, (126), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-07-12 10:56:54,015 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 316 transitions. [2022-07-12 10:56:54,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-12 10:56:54,015 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:56:54,015 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-12 10:56:54,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 10:56:54,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-12 10:56:54,235 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:56:54,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:56:54,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1710014025, now seen corresponding path program 1 times [2022-07-12 10:56:54,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:56:54,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637658991] [2022-07-12 10:56:54,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:54,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:56:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:54,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:56:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:54,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:56:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:54,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:54,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:56:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:54,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-12 10:56:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:54,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-12 10:56:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:54,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-12 10:56:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:54,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:54,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-12 10:56:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 10:56:54,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:56:54,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637658991] [2022-07-12 10:56:54,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637658991] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:56:54,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497154818] [2022-07-12 10:56:54,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:54,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:56:54,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:56:54,422 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:56:54,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 10:56:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:54,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 2585 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 10:56:54,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:56:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:56:54,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:56:54,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497154818] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:56:54,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:56:54,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2022-07-12 10:56:54,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320191547] [2022-07-12 10:56:54,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:56:54,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:56:54,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:56:54,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:56:54,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:56:54,811 INFO L87 Difference]: Start difference. First operand 240 states and 316 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-12 10:56:54,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:56:54,834 INFO L93 Difference]: Finished difference Result 299 states and 385 transitions. [2022-07-12 10:56:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:56:54,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 78 [2022-07-12 10:56:54,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:56:54,836 INFO L225 Difference]: With dead ends: 299 [2022-07-12 10:56:54,836 INFO L226 Difference]: Without dead ends: 245 [2022-07-12 10:56:54,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-07-12 10:56:54,837 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 2 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 10:56:54,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 810 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 10:56:54,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-12 10:56:54,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-07-12 10:56:54,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 179 states have (on average 1.1620111731843576) internal successors, (208), 184 states have internal predecessors, (208), 44 states have call successors, (44), 17 states have call predecessors, (44), 21 states have return successors, (69), 43 states have call predecessors, (69), 43 states have call successors, (69) [2022-07-12 10:56:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 321 transitions. [2022-07-12 10:56:54,852 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 321 transitions. Word has length 78 [2022-07-12 10:56:54,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:56:54,852 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 321 transitions. [2022-07-12 10:56:54,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-12 10:56:54,853 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 321 transitions. [2022-07-12 10:56:54,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-12 10:56:54,854 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:56:54,854 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 10:56:54,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 10:56:55,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-12 10:56:55,071 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:56:55,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:56:55,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1707972510, now seen corresponding path program 1 times [2022-07-12 10:56:55,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:56:55,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034271317] [2022-07-12 10:56:55,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:55,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:56:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:55,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:56:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:55,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:56:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:55,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:55,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:56:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:55,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-12 10:56:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:55,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 10:56:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:55,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-12 10:56:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 10:56:55,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:56:55,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034271317] [2022-07-12 10:56:55,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034271317] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:56:55,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:56:55,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-12 10:56:55,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386909840] [2022-07-12 10:56:55,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:56:55,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 10:56:55,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:56:55,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 10:56:55,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-07-12 10:56:55,256 INFO L87 Difference]: Start difference. First operand 245 states and 321 transitions. Second operand has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-12 10:56:55,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:56:55,844 INFO L93 Difference]: Finished difference Result 262 states and 343 transitions. [2022-07-12 10:56:55,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:56:55,844 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 76 [2022-07-12 10:56:55,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:56:55,845 INFO L225 Difference]: With dead ends: 262 [2022-07-12 10:56:55,845 INFO L226 Difference]: Without dead ends: 238 [2022-07-12 10:56:55,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-07-12 10:56:55,846 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 154 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 10:56:55,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1118 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 10:56:55,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-12 10:56:55,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 228. [2022-07-12 10:56:55,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 167 states have (on average 1.155688622754491) internal successors, (193), 170 states have internal predecessors, (193), 41 states have call successors, (41), 16 states have call predecessors, (41), 19 states have return successors, (64), 41 states have call predecessors, (64), 40 states have call successors, (64) [2022-07-12 10:56:55,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 298 transitions. [2022-07-12 10:56:55,855 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 298 transitions. Word has length 76 [2022-07-12 10:56:55,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:56:55,855 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 298 transitions. [2022-07-12 10:56:55,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-12 10:56:55,856 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 298 transitions. [2022-07-12 10:56:55,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-12 10:56:55,857 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:56:55,857 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 10:56:55,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-12 10:56:55,858 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:56:55,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:56:55,858 INFO L85 PathProgramCache]: Analyzing trace with hash -992443870, now seen corresponding path program 1 times [2022-07-12 10:56:55,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:56:55,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545727858] [2022-07-12 10:56:55,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:55,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:56:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:56,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:56:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:56,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:56:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:56,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:56,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:56:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:56,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-12 10:56:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:56,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 10:56:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:56,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-12 10:56:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:56:56,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:56:56,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545727858] [2022-07-12 10:56:56,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545727858] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:56:56,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:56:56,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-12 10:56:56,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802642154] [2022-07-12 10:56:56,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:56:56,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 10:56:56,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:56:56,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 10:56:56,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2022-07-12 10:56:56,310 INFO L87 Difference]: Start difference. First operand 228 states and 298 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-12 10:56:57,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:56:57,413 INFO L93 Difference]: Finished difference Result 245 states and 320 transitions. [2022-07-12 10:56:57,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 10:56:57,414 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2022-07-12 10:56:57,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:56:57,432 INFO L225 Difference]: With dead ends: 245 [2022-07-12 10:56:57,432 INFO L226 Difference]: Without dead ends: 210 [2022-07-12 10:56:57,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-07-12 10:56:57,433 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 228 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 1864 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 10:56:57,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 1274 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1864 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-12 10:56:57,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-12 10:56:57,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 189. [2022-07-12 10:56:57,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 136 states have (on average 1.1764705882352942) internal successors, (160), 139 states have internal predecessors, (160), 36 states have call successors, (36), 13 states have call predecessors, (36), 16 states have return successors, (56), 36 states have call predecessors, (56), 35 states have call successors, (56) [2022-07-12 10:56:57,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 252 transitions. [2022-07-12 10:56:57,443 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 252 transitions. Word has length 76 [2022-07-12 10:56:57,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:56:57,445 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 252 transitions. [2022-07-12 10:56:57,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-12 10:56:57,445 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 252 transitions. [2022-07-12 10:56:57,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-12 10:56:57,446 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:56:57,446 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-12 10:56:57,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-12 10:56:57,447 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:56:57,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:56:57,447 INFO L85 PathProgramCache]: Analyzing trace with hash -907054334, now seen corresponding path program 1 times [2022-07-12 10:56:57,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:56:57,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519072134] [2022-07-12 10:56:57,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:57,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:56:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:57,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:56:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:57,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:56:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:57,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:57,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:56:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:57,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-12 10:56:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:57,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-12 10:56:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:57,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-12 10:56:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:57,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:57,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 10:56:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:57,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-12 10:56:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 10:56:57,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:56:57,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519072134] [2022-07-12 10:56:57,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519072134] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:56:57,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411681456] [2022-07-12 10:56:57,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:57,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:56:57,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:56:57,617 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:56:57,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 10:56:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:57,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:56:57,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:56:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:56:58,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:56:58,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411681456] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:56:58,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:56:58,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2022-07-12 10:56:58,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125734253] [2022-07-12 10:56:58,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:56:58,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:56:58,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:56:58,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:56:58,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-07-12 10:56:58,063 INFO L87 Difference]: Start difference. First operand 189 states and 252 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-12 10:56:58,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:56:58,242 INFO L93 Difference]: Finished difference Result 352 states and 473 transitions. [2022-07-12 10:56:58,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:56:58,243 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 84 [2022-07-12 10:56:58,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:56:58,244 INFO L225 Difference]: With dead ends: 352 [2022-07-12 10:56:58,244 INFO L226 Difference]: Without dead ends: 192 [2022-07-12 10:56:58,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-07-12 10:56:58,246 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 286 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 10:56:58,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 659 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 10:56:58,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-07-12 10:56:58,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-07-12 10:56:58,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 138 states have (on average 1.173913043478261) internal successors, (162), 142 states have internal predecessors, (162), 36 states have call successors, (36), 13 states have call predecessors, (36), 17 states have return successors, (60), 36 states have call predecessors, (60), 35 states have call successors, (60) [2022-07-12 10:56:58,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 258 transitions. [2022-07-12 10:56:58,255 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 258 transitions. Word has length 84 [2022-07-12 10:56:58,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:56:58,255 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 258 transitions. [2022-07-12 10:56:58,255 INFO L496 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-12 10:56:58,255 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 258 transitions. [2022-07-12 10:56:58,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-12 10:56:58,256 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:56:58,257 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:56:58,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 10:56:58,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:56:58,476 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:56:58,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:56:58,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1537117189, now seen corresponding path program 1 times [2022-07-12 10:56:58,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:56:58,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413914310] [2022-07-12 10:56:58,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:58,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:56:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:58,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:56:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:58,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:56:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:58,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:58,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:56:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:58,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-12 10:56:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:58,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-12 10:56:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:58,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-12 10:56:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:58,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:58,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-12 10:56:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 10:56:58,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:56:58,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413914310] [2022-07-12 10:56:58,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413914310] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:56:58,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:56:58,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-12 10:56:58,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769429820] [2022-07-12 10:56:58,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:56:58,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:56:58,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:56:58,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:56:58,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:56:58,636 INFO L87 Difference]: Start difference. First operand 192 states and 258 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-07-12 10:56:59,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:56:59,028 INFO L93 Difference]: Finished difference Result 268 states and 343 transitions. [2022-07-12 10:56:59,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 10:56:59,029 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 89 [2022-07-12 10:56:59,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:56:59,030 INFO L225 Difference]: With dead ends: 268 [2022-07-12 10:56:59,030 INFO L226 Difference]: Without dead ends: 206 [2022-07-12 10:56:59,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:56:59,031 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 132 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 10:56:59,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 736 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 10:56:59,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-07-12 10:56:59,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 193. [2022-07-12 10:56:59,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 139 states have (on average 1.1726618705035972) internal successors, (163), 143 states have internal predecessors, (163), 36 states have call successors, (36), 13 states have call predecessors, (36), 17 states have return successors, (60), 36 states have call predecessors, (60), 35 states have call successors, (60) [2022-07-12 10:56:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 259 transitions. [2022-07-12 10:56:59,040 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 259 transitions. Word has length 89 [2022-07-12 10:56:59,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:56:59,040 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 259 transitions. [2022-07-12 10:56:59,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-07-12 10:56:59,041 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 259 transitions. [2022-07-12 10:56:59,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-12 10:56:59,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:56:59,042 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-07-12 10:56:59,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-12 10:56:59,042 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:56:59,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:56:59,043 INFO L85 PathProgramCache]: Analyzing trace with hash -381488286, now seen corresponding path program 1 times [2022-07-12 10:56:59,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:56:59,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051401207] [2022-07-12 10:56:59,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:59,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:56:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:59,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:56:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:59,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:56:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:59,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:59,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:56:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:59,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-12 10:56:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:59,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-12 10:56:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:59,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-12 10:56:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:59,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:59,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 10:56:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:59,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-12 10:56:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:59,219 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-12 10:56:59,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:56:59,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051401207] [2022-07-12 10:56:59,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051401207] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:56:59,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:56:59,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-12 10:56:59,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660462068] [2022-07-12 10:56:59,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:56:59,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 10:56:59,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:56:59,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 10:56:59,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-12 10:56:59,221 INFO L87 Difference]: Start difference. First operand 193 states and 259 transitions. Second operand has 11 states, 10 states have (on average 5.9) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-12 10:56:59,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:56:59,767 INFO L93 Difference]: Finished difference Result 208 states and 274 transitions. [2022-07-12 10:56:59,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:56:59,768 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 96 [2022-07-12 10:56:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:56:59,769 INFO L225 Difference]: With dead ends: 208 [2022-07-12 10:56:59,769 INFO L226 Difference]: Without dead ends: 206 [2022-07-12 10:56:59,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-07-12 10:56:59,769 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 91 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 10:56:59,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 897 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 10:56:59,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-07-12 10:56:59,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2022-07-12 10:56:59,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 142 states have (on average 1.1690140845070423) internal successors, (166), 146 states have internal predecessors, (166), 37 states have call successors, (37), 14 states have call predecessors, (37), 18 states have return successors, (61), 37 states have call predecessors, (61), 36 states have call successors, (61) [2022-07-12 10:56:59,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 264 transitions. [2022-07-12 10:56:59,779 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 264 transitions. Word has length 96 [2022-07-12 10:56:59,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:56:59,780 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 264 transitions. [2022-07-12 10:56:59,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-12 10:56:59,780 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 264 transitions. [2022-07-12 10:56:59,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-12 10:56:59,781 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:56:59,781 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:56:59,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-12 10:56:59,781 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:56:59,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:56:59,782 INFO L85 PathProgramCache]: Analyzing trace with hash -2050117184, now seen corresponding path program 1 times [2022-07-12 10:56:59,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:56:59,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535013847] [2022-07-12 10:56:59,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:59,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:56:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:59,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:56:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:59,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:56:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:59,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:59,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:56:59,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:59,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-12 10:56:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:59,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-12 10:56:59,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:59,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-12 10:56:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:59,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:56:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:59,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-12 10:56:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:59,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-12 10:56:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:56:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 10:56:59,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:56:59,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535013847] [2022-07-12 10:56:59,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535013847] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:56:59,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024228887] [2022-07-12 10:56:59,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:56:59,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:56:59,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:56:59,996 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:56:59,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 10:57:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:00,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 2645 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 10:57:00,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:57:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-12 10:57:00,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:57:00,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024228887] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:57:00,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:57:00,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2022-07-12 10:57:00,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458449313] [2022-07-12 10:57:00,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:57:00,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:57:00,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:57:00,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:57:00,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:57:00,460 INFO L87 Difference]: Start difference. First operand 198 states and 264 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-12 10:57:00,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:57:00,653 INFO L93 Difference]: Finished difference Result 335 states and 444 transitions. [2022-07-12 10:57:00,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:57:00,653 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 97 [2022-07-12 10:57:00,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:57:00,655 INFO L225 Difference]: With dead ends: 335 [2022-07-12 10:57:00,655 INFO L226 Difference]: Without dead ends: 199 [2022-07-12 10:57:00,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-07-12 10:57:00,656 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 324 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 10:57:00,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 757 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 10:57:00,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-12 10:57:00,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2022-07-12 10:57:00,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 140 states have (on average 1.1642857142857144) internal successors, (163), 143 states have internal predecessors, (163), 37 states have call successors, (37), 14 states have call predecessors, (37), 17 states have return successors, (57), 37 states have call predecessors, (57), 36 states have call successors, (57) [2022-07-12 10:57:00,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 257 transitions. [2022-07-12 10:57:00,664 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 257 transitions. Word has length 97 [2022-07-12 10:57:00,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:57:00,665 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 257 transitions. [2022-07-12 10:57:00,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-12 10:57:00,665 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 257 transitions. [2022-07-12 10:57:00,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-12 10:57:00,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:57:00,666 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:57:00,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 10:57:00,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-12 10:57:00,902 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:57:00,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:57:00,902 INFO L85 PathProgramCache]: Analyzing trace with hash -37945624, now seen corresponding path program 1 times [2022-07-12 10:57:00,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:57:00,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263756709] [2022-07-12 10:57:00,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:57:00,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:57:01,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:01,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:57:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:01,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:57:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:01,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:01,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:57:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:01,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-12 10:57:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:01,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-12 10:57:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:01,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-12 10:57:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:01,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:01,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 10:57:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:01,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-12 10:57:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-12 10:57:01,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:57:01,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263756709] [2022-07-12 10:57:01,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263756709] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:57:01,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953479412] [2022-07-12 10:57:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:57:01,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:57:01,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:57:01,274 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:57:01,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 10:57:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:01,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 2630 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-12 10:57:01,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:57:01,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 10:57:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:57:02,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:57:02,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953479412] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:57:02,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:57:02,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2022-07-12 10:57:02,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624277142] [2022-07-12 10:57:02,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:57:02,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 10:57:02,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:57:02,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 10:57:02,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2022-07-12 10:57:02,449 INFO L87 Difference]: Start difference. First operand 195 states and 257 transitions. Second operand has 26 states, 25 states have (on average 5.24) internal successors, (131), 21 states have internal predecessors, (131), 10 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (18), 8 states have call predecessors, (18), 10 states have call successors, (18) [2022-07-12 10:57:04,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:57:04,911 INFO L93 Difference]: Finished difference Result 573 states and 836 transitions. [2022-07-12 10:57:04,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-12 10:57:04,912 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 5.24) internal successors, (131), 21 states have internal predecessors, (131), 10 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (18), 8 states have call predecessors, (18), 10 states have call successors, (18) Word has length 100 [2022-07-12 10:57:04,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:57:04,915 INFO L225 Difference]: With dead ends: 573 [2022-07-12 10:57:04,915 INFO L226 Difference]: Without dead ends: 407 [2022-07-12 10:57:04,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 129 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=377, Invalid=2929, Unknown=0, NotChecked=0, Total=3306 [2022-07-12 10:57:04,916 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 303 mSDsluCounter, 3625 mSDsCounter, 0 mSdLazyCounter, 3002 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 3989 SdHoareTripleChecker+Invalid, 4168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 3002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1016 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-12 10:57:04,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 3989 Invalid, 4168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 3002 Invalid, 0 Unknown, 1016 Unchecked, 1.8s Time] [2022-07-12 10:57:04,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-07-12 10:57:04,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 221. [2022-07-12 10:57:04,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 163 states have (on average 1.1595092024539877) internal successors, (189), 168 states have internal predecessors, (189), 37 states have call successors, (37), 15 states have call predecessors, (37), 20 states have return successors, (62), 37 states have call predecessors, (62), 36 states have call successors, (62) [2022-07-12 10:57:04,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 288 transitions. [2022-07-12 10:57:04,932 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 288 transitions. Word has length 100 [2022-07-12 10:57:04,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:57:04,933 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 288 transitions. [2022-07-12 10:57:04,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 5.24) internal successors, (131), 21 states have internal predecessors, (131), 10 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (18), 8 states have call predecessors, (18), 10 states have call successors, (18) [2022-07-12 10:57:04,934 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 288 transitions. [2022-07-12 10:57:04,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-12 10:57:04,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:57:04,935 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:57:04,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 10:57:05,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-12 10:57:05,147 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:57:05,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:57:05,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1945195624, now seen corresponding path program 1 times [2022-07-12 10:57:05,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:57:05,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694346920] [2022-07-12 10:57:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:57:05,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:57:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:05,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:57:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:05,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:57:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:05,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:05,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:57:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:05,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-12 10:57:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:05,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-12 10:57:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:05,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-12 10:57:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:05,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:05,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 10:57:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:05,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-12 10:57:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-12 10:57:05,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:57:05,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694346920] [2022-07-12 10:57:05,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694346920] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:57:05,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894788822] [2022-07-12 10:57:05,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:57:05,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:57:05,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:57:05,305 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:57:05,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 10:57:05,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:05,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 2634 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-12 10:57:05,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:57:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:57:06,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:57:07,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894788822] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:57:07,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:57:07,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2022-07-12 10:57:07,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873791669] [2022-07-12 10:57:07,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:57:07,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 10:57:07,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:57:07,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 10:57:07,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2022-07-12 10:57:07,072 INFO L87 Difference]: Start difference. First operand 221 states and 288 transitions. Second operand has 24 states, 24 states have (on average 5.416666666666667) internal successors, (130), 19 states have internal predecessors, (130), 6 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-07-12 10:57:09,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:57:09,480 INFO L93 Difference]: Finished difference Result 592 states and 828 transitions. [2022-07-12 10:57:09,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-12 10:57:09,480 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.416666666666667) internal successors, (130), 19 states have internal predecessors, (130), 6 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 104 [2022-07-12 10:57:09,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:57:09,482 INFO L225 Difference]: With dead ends: 592 [2022-07-12 10:57:09,482 INFO L226 Difference]: Without dead ends: 374 [2022-07-12 10:57:09,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 130 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=600, Invalid=3690, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:57:09,484 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 315 mSDsluCounter, 2024 mSDsCounter, 0 mSdLazyCounter, 2672 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 2301 SdHoareTripleChecker+Invalid, 3876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 2672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 995 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-12 10:57:09,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 2301 Invalid, 3876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 2672 Invalid, 0 Unknown, 995 Unchecked, 1.3s Time] [2022-07-12 10:57:09,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-07-12 10:57:09,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 246. [2022-07-12 10:57:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 183 states have (on average 1.1420765027322404) internal successors, (209), 187 states have internal predecessors, (209), 41 states have call successors, (41), 17 states have call predecessors, (41), 21 states have return successors, (68), 41 states have call predecessors, (68), 40 states have call successors, (68) [2022-07-12 10:57:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 318 transitions. [2022-07-12 10:57:09,498 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 318 transitions. Word has length 104 [2022-07-12 10:57:09,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:57:09,499 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 318 transitions. [2022-07-12 10:57:09,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.416666666666667) internal successors, (130), 19 states have internal predecessors, (130), 6 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-07-12 10:57:09,499 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 318 transitions. [2022-07-12 10:57:09,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-12 10:57:09,500 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:57:09,500 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-12 10:57:09,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-12 10:57:09,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:57:09,720 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:57:09,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:57:09,721 INFO L85 PathProgramCache]: Analyzing trace with hash 180097083, now seen corresponding path program 1 times [2022-07-12 10:57:09,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:57:09,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208079643] [2022-07-12 10:57:09,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:57:09,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:57:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:09,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:57:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:09,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:57:09,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:09,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:09,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:57:09,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:09,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-12 10:57:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:09,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-12 10:57:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:09,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-12 10:57:09,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:09,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:10,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 10:57:10,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:10,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-12 10:57:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 23 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 10:57:10,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:57:10,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208079643] [2022-07-12 10:57:10,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208079643] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:57:10,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015532073] [2022-07-12 10:57:10,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:57:10,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:57:10,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:57:10,070 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:57:10,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 10:57:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:10,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 2641 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-12 10:57:10,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:57:10,850 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:57:10,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:57:11,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-07-12 10:57:11,116 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-12 10:57:11,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-07-12 10:57:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 10:57:11,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015532073] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:57:11,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:57:11,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 11] total 27 [2022-07-12 10:57:11,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693180006] [2022-07-12 10:57:11,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:57:11,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 10:57:11,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:57:11,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 10:57:11,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-07-12 10:57:11,142 INFO L87 Difference]: Start difference. First operand 246 states and 318 transitions. Second operand has 27 states, 27 states have (on average 5.925925925925926) internal successors, (160), 22 states have internal predecessors, (160), 8 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (24), 7 states have call predecessors, (24), 8 states have call successors, (24) [2022-07-12 10:57:14,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:57:14,215 INFO L93 Difference]: Finished difference Result 583 states and 811 transitions. [2022-07-12 10:57:14,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-12 10:57:14,215 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.925925925925926) internal successors, (160), 22 states have internal predecessors, (160), 8 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (24), 7 states have call predecessors, (24), 8 states have call successors, (24) Word has length 106 [2022-07-12 10:57:14,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:57:14,236 INFO L225 Difference]: With dead ends: 583 [2022-07-12 10:57:14,236 INFO L226 Difference]: Without dead ends: 395 [2022-07-12 10:57:14,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 217 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=503, Invalid=2340, Unknown=19, NotChecked=0, Total=2862 [2022-07-12 10:57:14,238 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 438 mSDsluCounter, 1741 mSDsCounter, 0 mSdLazyCounter, 3353 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 1984 SdHoareTripleChecker+Invalid, 4016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 3353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 411 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-12 10:57:14,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 1984 Invalid, 4016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 3353 Invalid, 0 Unknown, 411 Unchecked, 2.1s Time] [2022-07-12 10:57:14,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-07-12 10:57:14,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 314. [2022-07-12 10:57:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 230 states have (on average 1.1608695652173913) internal successors, (267), 233 states have internal predecessors, (267), 61 states have call successors, (61), 19 states have call predecessors, (61), 22 states have return successors, (102), 61 states have call predecessors, (102), 60 states have call successors, (102) [2022-07-12 10:57:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 430 transitions. [2022-07-12 10:57:14,265 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 430 transitions. Word has length 106 [2022-07-12 10:57:14,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:57:14,267 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 430 transitions. [2022-07-12 10:57:14,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.925925925925926) internal successors, (160), 22 states have internal predecessors, (160), 8 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (24), 7 states have call predecessors, (24), 8 states have call successors, (24) [2022-07-12 10:57:14,267 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 430 transitions. [2022-07-12 10:57:14,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-12 10:57:14,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:57:14,269 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:57:14,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 10:57:14,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:57:14,487 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:57:14,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:57:14,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1914201533, now seen corresponding path program 1 times [2022-07-12 10:57:14,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:57:14,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987097980] [2022-07-12 10:57:14,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:57:14,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:57:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:14,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:57:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:14,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 10:57:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:14,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:14,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:14,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 10:57:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:14,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-12 10:57:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:14,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-12 10:57:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:14,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-12 10:57:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:14,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:14,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 10:57:14,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:14,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-12 10:57:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-12 10:57:14,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:57:14,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987097980] [2022-07-12 10:57:14,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987097980] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:57:14,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:57:14,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-12 10:57:14,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518086935] [2022-07-12 10:57:14,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:57:14,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 10:57:14,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:57:14,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 10:57:14,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-12 10:57:14,827 INFO L87 Difference]: Start difference. First operand 314 states and 430 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 8 states have internal predecessors, (53), 5 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-12 10:57:15,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:57:15,343 INFO L93 Difference]: Finished difference Result 613 states and 845 transitions. [2022-07-12 10:57:15,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:57:15,343 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 8 states have internal predecessors, (53), 5 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 106 [2022-07-12 10:57:15,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:57:15,344 INFO L225 Difference]: With dead ends: 613 [2022-07-12 10:57:15,344 INFO L226 Difference]: Without dead ends: 321 [2022-07-12 10:57:15,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-12 10:57:15,349 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 235 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 10:57:15,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 622 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 10:57:15,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-07-12 10:57:15,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 314. [2022-07-12 10:57:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 230 states have (on average 1.1565217391304348) internal successors, (266), 233 states have internal predecessors, (266), 61 states have call successors, (61), 19 states have call predecessors, (61), 22 states have return successors, (102), 61 states have call predecessors, (102), 60 states have call successors, (102) [2022-07-12 10:57:15,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 429 transitions. [2022-07-12 10:57:15,371 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 429 transitions. Word has length 106 [2022-07-12 10:57:15,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:57:15,371 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 429 transitions. [2022-07-12 10:57:15,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 8 states have internal predecessors, (53), 5 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-12 10:57:15,371 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 429 transitions. [2022-07-12 10:57:15,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-12 10:57:15,372 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:57:15,372 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-12 10:57:15,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-12 10:57:15,373 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:57:15,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:57:15,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1339854717, now seen corresponding path program 1 times [2022-07-12 10:57:15,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:57:15,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782142806] [2022-07-12 10:57:15,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:57:15,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:57:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:15,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:57:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:15,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:57:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:15,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 10:57:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:15,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:15,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 10:57:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:15,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-12 10:57:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:15,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 10:57:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:15,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-12 10:57:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:15,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:15,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 10:57:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:15,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-12 10:57:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:16,106 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-12 10:57:16,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:57:16,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782142806] [2022-07-12 10:57:16,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782142806] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:57:16,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938275290] [2022-07-12 10:57:16,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:57:16,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:57:16,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:57:16,108 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:57:16,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 10:57:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:16,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 2659 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-12 10:57:16,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:57:16,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 10:57:16,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:57:16,747 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:57:16,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2022-07-12 10:57:17,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 10:57:17,171 INFO L356 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-07-12 10:57:17,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 1 [2022-07-12 10:57:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 10:57:17,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:57:19,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938275290] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:57:19,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:57:19,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 28 [2022-07-12 10:57:19,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354745554] [2022-07-12 10:57:19,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:57:19,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 10:57:19,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:57:19,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 10:57:19,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1001, Unknown=2, NotChecked=0, Total=1122 [2022-07-12 10:57:19,663 INFO L87 Difference]: Start difference. First operand 314 states and 429 transitions. Second operand has 28 states, 27 states have (on average 4.407407407407407) internal successors, (119), 24 states have internal predecessors, (119), 8 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-12 10:57:22,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:57:22,418 INFO L93 Difference]: Finished difference Result 454 states and 617 transitions. [2022-07-12 10:57:22,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 10:57:22,418 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.407407407407407) internal successors, (119), 24 states have internal predecessors, (119), 8 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 111 [2022-07-12 10:57:22,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:57:22,420 INFO L225 Difference]: With dead ends: 454 [2022-07-12 10:57:22,420 INFO L226 Difference]: Without dead ends: 391 [2022-07-12 10:57:22,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 148 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=515, Invalid=2447, Unknown=8, NotChecked=0, Total=2970 [2022-07-12 10:57:22,421 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 446 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 2617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-12 10:57:22,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 1462 Invalid, 2617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 2033 Invalid, 0 Unknown, 353 Unchecked, 1.4s Time] [2022-07-12 10:57:22,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-07-12 10:57:22,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 324. [2022-07-12 10:57:22,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 240 states have (on average 1.1541666666666666) internal successors, (277), 242 states have internal predecessors, (277), 61 states have call successors, (61), 20 states have call predecessors, (61), 22 states have return successors, (101), 61 states have call predecessors, (101), 60 states have call successors, (101) [2022-07-12 10:57:22,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 439 transitions. [2022-07-12 10:57:22,445 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 439 transitions. Word has length 111 [2022-07-12 10:57:22,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:57:22,446 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 439 transitions. [2022-07-12 10:57:22,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.407407407407407) internal successors, (119), 24 states have internal predecessors, (119), 8 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-12 10:57:22,446 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 439 transitions. [2022-07-12 10:57:22,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-12 10:57:22,447 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:57:22,447 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-12 10:57:22,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 10:57:22,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-12 10:57:22,663 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:57:22,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:57:22,664 INFO L85 PathProgramCache]: Analyzing trace with hash 562499652, now seen corresponding path program 1 times [2022-07-12 10:57:22,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:57:22,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245537808] [2022-07-12 10:57:22,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:57:22,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:57:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:22,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:57:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:22,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:57:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:22,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 10:57:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:22,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:22,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 10:57:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:22,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-12 10:57:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:22,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 10:57:22,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:22,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-12 10:57:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:22,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:22,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 10:57:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:22,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-12 10:57:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-12 10:57:22,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:57:22,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245537808] [2022-07-12 10:57:22,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245537808] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:57:22,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:57:22,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-12 10:57:22,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533536811] [2022-07-12 10:57:22,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:57:22,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 10:57:22,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:57:22,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 10:57:22,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-07-12 10:57:22,872 INFO L87 Difference]: Start difference. First operand 324 states and 439 transitions. Second operand has 13 states, 12 states have (on average 5.166666666666667) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-12 10:57:23,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:57:23,451 INFO L93 Difference]: Finished difference Result 339 states and 455 transitions. [2022-07-12 10:57:23,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:57:23,452 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.166666666666667) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 113 [2022-07-12 10:57:23,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:57:23,454 INFO L225 Difference]: With dead ends: 339 [2022-07-12 10:57:23,454 INFO L226 Difference]: Without dead ends: 337 [2022-07-12 10:57:23,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-07-12 10:57:23,454 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 147 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 10:57:23,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1030 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 10:57:23,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-07-12 10:57:23,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 323. [2022-07-12 10:57:23,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 240 states have (on average 1.1541666666666666) internal successors, (277), 242 states have internal predecessors, (277), 60 states have call successors, (60), 20 states have call predecessors, (60), 22 states have return successors, (100), 60 states have call predecessors, (100), 59 states have call successors, (100) [2022-07-12 10:57:23,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 437 transitions. [2022-07-12 10:57:23,478 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 437 transitions. Word has length 113 [2022-07-12 10:57:23,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:57:23,478 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 437 transitions. [2022-07-12 10:57:23,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.166666666666667) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-12 10:57:23,478 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 437 transitions. [2022-07-12 10:57:23,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-12 10:57:23,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:57:23,479 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-12 10:57:23,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-12 10:57:23,480 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:57:23,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:57:23,480 INFO L85 PathProgramCache]: Analyzing trace with hash 782483972, now seen corresponding path program 1 times [2022-07-12 10:57:23,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:57:23,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741470591] [2022-07-12 10:57:23,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:57:23,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:57:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:23,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:57:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:23,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:57:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:23,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 10:57:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:23,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:23,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 10:57:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:23,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-12 10:57:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:23,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 10:57:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:23,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-12 10:57:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:23,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:24,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 10:57:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:24,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-12 10:57:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 10:57:24,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:57:24,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741470591] [2022-07-12 10:57:24,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741470591] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:57:24,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:57:24,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-12 10:57:24,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118816777] [2022-07-12 10:57:24,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:57:24,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:57:24,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:57:24,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:57:24,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:57:24,147 INFO L87 Difference]: Start difference. First operand 323 states and 437 transitions. Second operand has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 14 states have internal predecessors, (71), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-12 10:57:25,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:57:25,650 INFO L93 Difference]: Finished difference Result 386 states and 542 transitions. [2022-07-12 10:57:25,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 10:57:25,651 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 14 states have internal predecessors, (71), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 113 [2022-07-12 10:57:25,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:57:25,652 INFO L225 Difference]: With dead ends: 386 [2022-07-12 10:57:25,652 INFO L226 Difference]: Without dead ends: 384 [2022-07-12 10:57:25,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 10:57:25,653 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 347 mSDsluCounter, 1513 mSDsCounter, 0 mSdLazyCounter, 2551 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 2776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 2551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 10:57:25,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 1720 Invalid, 2776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 2551 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-12 10:57:25,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-07-12 10:57:25,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 327. [2022-07-12 10:57:25,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 243 states have (on average 1.1522633744855968) internal successors, (280), 245 states have internal predecessors, (280), 60 states have call successors, (60), 21 states have call predecessors, (60), 23 states have return successors, (100), 60 states have call predecessors, (100), 59 states have call successors, (100) [2022-07-12 10:57:25,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 440 transitions. [2022-07-12 10:57:25,679 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 440 transitions. Word has length 113 [2022-07-12 10:57:25,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:57:25,680 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 440 transitions. [2022-07-12 10:57:25,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 14 states have internal predecessors, (71), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-12 10:57:25,680 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 440 transitions. [2022-07-12 10:57:25,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-12 10:57:25,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:57:25,681 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:57:25,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-12 10:57:25,681 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:57:25,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:57:25,682 INFO L85 PathProgramCache]: Analyzing trace with hash 886573656, now seen corresponding path program 1 times [2022-07-12 10:57:25,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:57:25,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122331717] [2022-07-12 10:57:25,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:57:25,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:57:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:25,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:57:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:25,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:57:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:25,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 10:57:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:25,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:25,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 10:57:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:25,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-12 10:57:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:25,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 10:57:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:25,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-12 10:57:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:25,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:25,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-12 10:57:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:25,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-07-12 10:57:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:25,838 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-12 10:57:25,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:57:25,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122331717] [2022-07-12 10:57:25,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122331717] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:57:25,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:57:25,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-12 10:57:25,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939782278] [2022-07-12 10:57:25,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:57:25,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:57:25,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:57:25,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:57:25,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:57:25,839 INFO L87 Difference]: Start difference. First operand 327 states and 440 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-12 10:57:26,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:57:26,294 INFO L93 Difference]: Finished difference Result 439 states and 572 transitions. [2022-07-12 10:57:26,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 10:57:26,295 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 114 [2022-07-12 10:57:26,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:57:26,296 INFO L225 Difference]: With dead ends: 439 [2022-07-12 10:57:26,296 INFO L226 Difference]: Without dead ends: 356 [2022-07-12 10:57:26,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:57:26,297 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 77 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 10:57:26,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 767 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 10:57:26,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-07-12 10:57:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 327. [2022-07-12 10:57:26,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 243 states have (on average 1.1522633744855968) internal successors, (280), 245 states have internal predecessors, (280), 60 states have call successors, (60), 21 states have call predecessors, (60), 23 states have return successors, (100), 60 states have call predecessors, (100), 59 states have call successors, (100) [2022-07-12 10:57:26,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 440 transitions. [2022-07-12 10:57:26,322 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 440 transitions. Word has length 114 [2022-07-12 10:57:26,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:57:26,322 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 440 transitions. [2022-07-12 10:57:26,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-12 10:57:26,323 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 440 transitions. [2022-07-12 10:57:26,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-12 10:57:26,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:57:26,324 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:57:26,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-12 10:57:26,324 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:57:26,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:57:26,324 INFO L85 PathProgramCache]: Analyzing trace with hash 2002003192, now seen corresponding path program 1 times [2022-07-12 10:57:26,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:57:26,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662752366] [2022-07-12 10:57:26,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:57:26,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:57:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:26,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:57:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:26,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:57:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:26,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 10:57:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:26,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:26,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:26,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 10:57:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:26,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-12 10:57:26,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:26,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 10:57:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:26,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-12 10:57:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:26,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:26,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-12 10:57:26,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:26,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-12 10:57:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-12 10:57:26,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:57:26,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662752366] [2022-07-12 10:57:26,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662752366] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:57:26,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242062670] [2022-07-12 10:57:26,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:57:26,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:57:26,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:57:26,654 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:57:26,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 10:57:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:27,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 2711 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-12 10:57:27,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:57:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:57:27,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:57:27,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-07-12 10:57:27,694 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-12 10:57:27,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2022-07-12 10:57:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 10:57:27,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242062670] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:57:27,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:57:27,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 25 [2022-07-12 10:57:27,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259508610] [2022-07-12 10:57:27,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:57:27,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 10:57:27,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:57:27,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 10:57:27,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-07-12 10:57:27,728 INFO L87 Difference]: Start difference. First operand 327 states and 440 transitions. Second operand has 25 states, 25 states have (on average 6.2) internal successors, (155), 20 states have internal predecessors, (155), 7 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (21), 5 states have call predecessors, (21), 7 states have call successors, (21) [2022-07-12 10:57:29,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:57:29,165 INFO L93 Difference]: Finished difference Result 543 states and 707 transitions. [2022-07-12 10:57:29,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 10:57:29,166 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.2) internal successors, (155), 20 states have internal predecessors, (155), 7 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (21), 5 states have call predecessors, (21), 7 states have call successors, (21) Word has length 116 [2022-07-12 10:57:29,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:57:29,167 INFO L225 Difference]: With dead ends: 543 [2022-07-12 10:57:29,167 INFO L226 Difference]: Without dead ends: 339 [2022-07-12 10:57:29,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 247 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=288, Invalid=1272, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 10:57:29,169 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 235 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 1641 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 496 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 10:57:29,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 1319 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1641 Invalid, 0 Unknown, 496 Unchecked, 0.9s Time] [2022-07-12 10:57:29,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-07-12 10:57:29,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 325. [2022-07-12 10:57:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 243 states have (on average 1.1440329218106995) internal successors, (278), 246 states have internal predecessors, (278), 58 states have call successors, (58), 20 states have call predecessors, (58), 23 states have return successors, (95), 58 states have call predecessors, (95), 57 states have call successors, (95) [2022-07-12 10:57:29,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 431 transitions. [2022-07-12 10:57:29,219 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 431 transitions. Word has length 116 [2022-07-12 10:57:29,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:57:29,219 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 431 transitions. [2022-07-12 10:57:29,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.2) internal successors, (155), 20 states have internal predecessors, (155), 7 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (21), 5 states have call predecessors, (21), 7 states have call successors, (21) [2022-07-12 10:57:29,220 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 431 transitions. [2022-07-12 10:57:29,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-12 10:57:29,221 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:57:29,221 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:57:29,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 10:57:29,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:57:29,439 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:57:29,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:57:29,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1849063430, now seen corresponding path program 1 times [2022-07-12 10:57:29,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:57:29,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579299951] [2022-07-12 10:57:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:57:29,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:57:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:29,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:57:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:29,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:57:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:29,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 10:57:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:29,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:29,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 10:57:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:29,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-12 10:57:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:29,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 10:57:29,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:29,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-12 10:57:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:29,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:29,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:29,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-12 10:57:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:29,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-12 10:57:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:57:30,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:57:30,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579299951] [2022-07-12 10:57:30,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579299951] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:57:30,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226145784] [2022-07-12 10:57:30,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:57:30,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:57:30,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:57:30,047 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:57:30,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 10:57:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:30,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 2716 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-12 10:57:30,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:57:30,413 INFO L390 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 [2022-07-12 10:57:30,622 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 10:57:30,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-12 10:57:30,988 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 10:57:30,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-12 10:57:31,149 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 10:57:31,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 10:57:31,229 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1468 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_1468))) is different from true [2022-07-12 10:57:31,235 INFO L390 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 17 treesize of output 19 [2022-07-12 10:57:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:57:39,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:57:39,963 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1471 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| v_ArrVal_1471) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_harness_~#buf~3#1.base|) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_harness_~#buf~3#1.offset|))) (<= .cse0 (+ 18446744073709551615 (* (div (+ (- 1) .cse0) 18446744073709551616) 18446744073709551616))))) is different from false [2022-07-12 10:57:39,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226145784] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:57:39,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:57:39,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21] total 44 [2022-07-12 10:57:39,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703704457] [2022-07-12 10:57:39,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:57:39,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-12 10:57:39,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:57:39,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-12 10:57:39,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1895, Unknown=4, NotChecked=178, Total=2256 [2022-07-12 10:57:39,966 INFO L87 Difference]: Start difference. First operand 325 states and 431 transitions. Second operand has 44 states, 42 states have (on average 4.119047619047619) internal successors, (173), 39 states have internal predecessors, (173), 15 states have call successors, (22), 10 states have call predecessors, (22), 12 states have return successors, (21), 12 states have call predecessors, (21), 14 states have call successors, (21) [2022-07-12 10:57:49,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:57:49,910 INFO L93 Difference]: Finished difference Result 572 states and 777 transitions. [2022-07-12 10:57:49,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-12 10:57:49,910 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 4.119047619047619) internal successors, (173), 39 states have internal predecessors, (173), 15 states have call successors, (22), 10 states have call predecessors, (22), 12 states have return successors, (21), 12 states have call predecessors, (21), 14 states have call successors, (21) Word has length 116 [2022-07-12 10:57:49,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:57:49,912 INFO L225 Difference]: With dead ends: 572 [2022-07-12 10:57:49,912 INFO L226 Difference]: Without dead ends: 475 [2022-07-12 10:57:49,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 158 SyntacticMatches, 13 SemanticMatches, 91 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2502 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=952, Invalid=7208, Unknown=38, NotChecked=358, Total=8556 [2022-07-12 10:57:49,914 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 631 mSDsluCounter, 2224 mSDsCounter, 0 mSdLazyCounter, 2878 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 2478 SdHoareTripleChecker+Invalid, 5354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 2878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2039 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-12 10:57:49,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 2478 Invalid, 5354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 2878 Invalid, 0 Unknown, 2039 Unchecked, 1.8s Time] [2022-07-12 10:57:49,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-07-12 10:57:49,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 409. [2022-07-12 10:57:49,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 306 states have (on average 1.1405228758169934) internal successors, (349), 310 states have internal predecessors, (349), 74 states have call successors, (74), 24 states have call predecessors, (74), 28 states have return successors, (137), 74 states have call predecessors, (137), 73 states have call successors, (137) [2022-07-12 10:57:49,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 560 transitions. [2022-07-12 10:57:49,947 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 560 transitions. Word has length 116 [2022-07-12 10:57:49,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:57:49,947 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 560 transitions. [2022-07-12 10:57:49,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 4.119047619047619) internal successors, (173), 39 states have internal predecessors, (173), 15 states have call successors, (22), 10 states have call predecessors, (22), 12 states have return successors, (21), 12 states have call predecessors, (21), 14 states have call successors, (21) [2022-07-12 10:57:49,958 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 560 transitions. [2022-07-12 10:57:49,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-12 10:57:49,959 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:57:49,959 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:57:49,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 10:57:50,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:57:50,175 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:57:50,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:57:50,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1166040188, now seen corresponding path program 1 times [2022-07-12 10:57:50,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:57:50,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485257860] [2022-07-12 10:57:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:57:50,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:57:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:50,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:57:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:50,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:57:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:50,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 10:57:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:50,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:50,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 10:57:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:50,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-12 10:57:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:50,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 10:57:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:50,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-12 10:57:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:50,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:50,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-12 10:57:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:50,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-12 10:57:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-12 10:57:50,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:57:50,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485257860] [2022-07-12 10:57:50,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485257860] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:57:50,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:57:50,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-12 10:57:50,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705977919] [2022-07-12 10:57:50,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:57:50,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:57:50,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:57:50,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:57:50,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:57:50,654 INFO L87 Difference]: Start difference. First operand 409 states and 560 transitions. Second operand has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 15 states have internal predecessors, (63), 7 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-12 10:57:52,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:57:52,084 INFO L93 Difference]: Finished difference Result 580 states and 811 transitions. [2022-07-12 10:57:52,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 10:57:52,085 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 15 states have internal predecessors, (63), 7 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 116 [2022-07-12 10:57:52,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:57:52,087 INFO L225 Difference]: With dead ends: 580 [2022-07-12 10:57:52,087 INFO L226 Difference]: Without dead ends: 477 [2022-07-12 10:57:52,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:57:52,087 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 343 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 10:57:52,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 595 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-12 10:57:52,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-07-12 10:57:52,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 399. [2022-07-12 10:57:52,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 300 states have (on average 1.1333333333333333) internal successors, (340), 304 states have internal predecessors, (340), 71 states have call successors, (71), 23 states have call predecessors, (71), 27 states have return successors, (134), 71 states have call predecessors, (134), 70 states have call successors, (134) [2022-07-12 10:57:52,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 545 transitions. [2022-07-12 10:57:52,125 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 545 transitions. Word has length 116 [2022-07-12 10:57:52,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:57:52,125 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 545 transitions. [2022-07-12 10:57:52,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 15 states have internal predecessors, (63), 7 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-12 10:57:52,126 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 545 transitions. [2022-07-12 10:57:52,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-12 10:57:52,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:57:52,127 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:57:52,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-12 10:57:52,127 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:57:52,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:57:52,128 INFO L85 PathProgramCache]: Analyzing trace with hash -828439065, now seen corresponding path program 1 times [2022-07-12 10:57:52,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:57:52,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370644195] [2022-07-12 10:57:52,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:57:52,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:57:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:52,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:57:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:52,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:57:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:52,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 10:57:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:52,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:52,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 10:57:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:52,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-12 10:57:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:52,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 10:57:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:52,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-12 10:57:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:52,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:52,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-12 10:57:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:52,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-12 10:57:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-12 10:57:52,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:57:52,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370644195] [2022-07-12 10:57:52,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370644195] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:57:52,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:57:52,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-12 10:57:52,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326589437] [2022-07-12 10:57:52,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:57:52,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:57:52,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:57:52,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:57:52,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:57:52,299 INFO L87 Difference]: Start difference. First operand 399 states and 545 transitions. Second operand has 10 states, 9 states have (on average 7.222222222222222) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-12 10:57:52,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:57:52,777 INFO L93 Difference]: Finished difference Result 418 states and 568 transitions. [2022-07-12 10:57:52,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:57:52,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.222222222222222) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 120 [2022-07-12 10:57:52,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:57:52,779 INFO L225 Difference]: With dead ends: 418 [2022-07-12 10:57:52,779 INFO L226 Difference]: Without dead ends: 416 [2022-07-12 10:57:52,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-07-12 10:57:52,780 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 78 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 10:57:52,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 854 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 10:57:52,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-07-12 10:57:52,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 406. [2022-07-12 10:57:52,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 303 states have (on average 1.132013201320132) internal successors, (343), 307 states have internal predecessors, (343), 74 states have call successors, (74), 24 states have call predecessors, (74), 28 states have return successors, (137), 74 states have call predecessors, (137), 73 states have call successors, (137) [2022-07-12 10:57:52,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 554 transitions. [2022-07-12 10:57:52,817 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 554 transitions. Word has length 120 [2022-07-12 10:57:52,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:57:52,817 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 554 transitions. [2022-07-12 10:57:52,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.222222222222222) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-12 10:57:52,817 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 554 transitions. [2022-07-12 10:57:52,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-12 10:57:52,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:57:52,818 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:57:52,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-12 10:57:52,819 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:57:52,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:57:52,819 INFO L85 PathProgramCache]: Analyzing trace with hash 19637997, now seen corresponding path program 1 times [2022-07-12 10:57:52,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:57:52,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552848091] [2022-07-12 10:57:52,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:57:52,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:57:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:53,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:57:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:53,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:57:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:53,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 10:57:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:53,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:53,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 10:57:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:53,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-12 10:57:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:53,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 10:57:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:53,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-12 10:57:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:53,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:57:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:53,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-12 10:57:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:53,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-12 10:57:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 10:57:53,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:57:53,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552848091] [2022-07-12 10:57:53,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552848091] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:57:53,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059123495] [2022-07-12 10:57:53,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:57:53,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:57:53,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:57:53,375 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:57:53,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 10:57:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:57:53,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 2718 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-12 10:57:53,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:57:53,755 INFO L390 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 [2022-07-12 10:57:53,974 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 10:57:53,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-12 10:57:53,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 10:57:54,336 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 10:57:54,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-12 10:57:54,526 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 10:57:54,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 10:57:54,611 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1656 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_1656) |c_#memory_int|)) is different from true [2022-07-12 10:57:54,623 INFO L390 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 17 treesize of output 19 [2022-07-12 10:58:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 14 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:58:03,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:58:03,397 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1659 (Array Int Int))) (not (= 0 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| v_ArrVal_1659) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset| 16)) 18446744073709551616)))) is different from false [2022-07-12 10:58:03,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059123495] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:58:03,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:58:03,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 46 [2022-07-12 10:58:03,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669003552] [2022-07-12 10:58:03,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:58:03,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 10:58:03,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:58:03,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 10:58:03,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2271, Unknown=4, NotChecked=194, Total=2652 [2022-07-12 10:58:03,400 INFO L87 Difference]: Start difference. First operand 406 states and 554 transitions. Second operand has 46 states, 43 states have (on average 4.232558139534884) internal successors, (182), 41 states have internal predecessors, (182), 17 states have call successors, (22), 9 states have call predecessors, (22), 12 states have return successors, (21), 14 states have call predecessors, (21), 16 states have call successors, (21) [2022-07-12 10:58:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:58:12,234 INFO L93 Difference]: Finished difference Result 844 states and 1260 transitions. [2022-07-12 10:58:12,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-12 10:58:12,234 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 4.232558139534884) internal successors, (182), 41 states have internal predecessors, (182), 17 states have call successors, (22), 9 states have call predecessors, (22), 12 states have return successors, (21), 14 states have call predecessors, (21), 16 states have call successors, (21) Word has length 124 [2022-07-12 10:58:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:58:12,237 INFO L225 Difference]: With dead ends: 844 [2022-07-12 10:58:12,237 INFO L226 Difference]: Without dead ends: 631 [2022-07-12 10:58:12,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 164 SyntacticMatches, 12 SemanticMatches, 105 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3129 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=855, Invalid=10040, Unknown=33, NotChecked=414, Total=11342 [2022-07-12 10:58:12,240 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 409 mSDsluCounter, 3350 mSDsCounter, 0 mSdLazyCounter, 4329 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 3667 SdHoareTripleChecker+Invalid, 7341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 4329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2674 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-12 10:58:12,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 3667 Invalid, 7341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 4329 Invalid, 0 Unknown, 2674 Unchecked, 2.6s Time] [2022-07-12 10:58:12,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-07-12 10:58:12,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 472. [2022-07-12 10:58:12,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 352 states have (on average 1.1619318181818181) internal successors, (409), 360 states have internal predecessors, (409), 90 states have call successors, (90), 25 states have call predecessors, (90), 29 states have return successors, (171), 86 states have call predecessors, (171), 89 states have call successors, (171) [2022-07-12 10:58:12,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 670 transitions. [2022-07-12 10:58:12,319 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 670 transitions. Word has length 124 [2022-07-12 10:58:12,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:58:12,319 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 670 transitions. [2022-07-12 10:58:12,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 4.232558139534884) internal successors, (182), 41 states have internal predecessors, (182), 17 states have call successors, (22), 9 states have call predecessors, (22), 12 states have return successors, (21), 14 states have call predecessors, (21), 16 states have call successors, (21) [2022-07-12 10:58:12,319 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 670 transitions. [2022-07-12 10:58:12,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-12 10:58:12,321 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:58:12,321 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:58:12,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-12 10:58:12,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:58:12,535 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:58:12,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:58:12,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1260225681, now seen corresponding path program 2 times [2022-07-12 10:58:12,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:58:12,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94194318] [2022-07-12 10:58:12,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:58:12,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:58:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:58:12,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:58:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:58:12,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:58:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:58:12,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 10:58:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:58:12,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:58:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:58:12,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 10:58:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:58:12,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-12 10:58:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:58:12,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 10:58:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:58:12,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-12 10:58:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:58:12,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:58:12,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:58:12,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-12 10:58:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:58:12,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-12 10:58:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:58:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 10:58:12,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:58:12,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94194318] [2022-07-12 10:58:12,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94194318] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:58:12,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236110839] [2022-07-12 10:58:12,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:58:12,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:58:12,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:58:12,845 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:58:12,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 10:58:13,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:58:13,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:58:13,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 2713 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-12 10:58:13,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:58:13,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 10:58:14,016 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1744 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_1744) |c_#memory_int|)) is different from true [2022-07-12 10:58:14,030 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 10:58:14,030 INFO L390 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 17 treesize of output 23 [2022-07-12 10:58:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 18 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:58:19,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:58:22,133 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1747 (Array Int Int)) (|ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| Int)) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| v_ArrVal_1747) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.base|))) (let ((.cse1 (mod (select .cse0 (+ |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset| 16)) 18446744073709551616))) (or (= (mod (select .cse0 |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset|) 18446744073709551616) 0) (not (<= .cse1 0)) (not (<= (mod (select v_ArrVal_1747 |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.offset|) 18446744073709551616) .cse1)))))) is different from false [2022-07-12 10:58:22,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236110839] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:58:22,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:58:22,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 26] total 36 [2022-07-12 10:58:22,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782430624] [2022-07-12 10:58:22,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:58:22,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-12 10:58:22,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:58:22,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-12 10:58:22,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1801, Unknown=4, NotChecked=174, Total=2162 [2022-07-12 10:58:22,136 INFO L87 Difference]: Start difference. First operand 472 states and 670 transitions. Second operand has 36 states, 33 states have (on average 4.818181818181818) internal successors, (159), 31 states have internal predecessors, (159), 12 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (21), 9 states have call predecessors, (21), 11 states have call successors, (21) [2022-07-12 10:59:00,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:59:00,303 INFO L93 Difference]: Finished difference Result 705 states and 981 transitions. [2022-07-12 10:59:00,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-12 10:59:00,304 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 4.818181818181818) internal successors, (159), 31 states have internal predecessors, (159), 12 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (21), 9 states have call predecessors, (21), 11 states have call successors, (21) Word has length 124 [2022-07-12 10:59:00,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:59:00,306 INFO L225 Difference]: With dead ends: 705 [2022-07-12 10:59:00,306 INFO L226 Difference]: Without dead ends: 574 [2022-07-12 10:59:00,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 153 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 44.5s TimeCoverageRelationStatistics Valid=724, Invalid=5555, Unknown=49, NotChecked=314, Total=6642 [2022-07-12 10:59:00,307 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 250 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 2557 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 4152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1524 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-12 10:59:00,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 1472 Invalid, 4152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2557 Invalid, 0 Unknown, 1524 Unchecked, 1.3s Time] [2022-07-12 10:59:00,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-07-12 10:59:00,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 497. [2022-07-12 10:59:00,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 376 states have (on average 1.1569148936170213) internal successors, (435), 382 states have internal predecessors, (435), 90 states have call successors, (90), 28 states have call predecessors, (90), 30 states have return successors, (165), 86 states have call predecessors, (165), 89 states have call successors, (165) [2022-07-12 10:59:00,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 690 transitions. [2022-07-12 10:59:00,361 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 690 transitions. Word has length 124 [2022-07-12 10:59:00,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:59:00,362 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 690 transitions. [2022-07-12 10:59:00,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 4.818181818181818) internal successors, (159), 31 states have internal predecessors, (159), 12 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (21), 9 states have call predecessors, (21), 11 states have call successors, (21) [2022-07-12 10:59:00,363 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 690 transitions. [2022-07-12 10:59:00,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-12 10:59:00,364 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:59:00,364 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-07-12 10:59:00,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 10:59:00,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-12 10:59:00,571 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:59:00,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:59:00,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1188228275, now seen corresponding path program 1 times [2022-07-12 10:59:00,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:59:00,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381695565] [2022-07-12 10:59:00,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:59:00,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:59:00,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:00,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:59:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:00,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:59:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:00,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 10:59:00,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:00,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:59:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:00,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 10:59:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:00,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-12 10:59:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:00,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 10:59:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:00,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-12 10:59:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:00,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:59:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:00,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-12 10:59:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:00,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-12 10:59:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 10:59:00,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:59:00,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381695565] [2022-07-12 10:59:00,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381695565] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:59:00,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968065861] [2022-07-12 10:59:00,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:59:00,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:59:00,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:59:00,865 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:59:00,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 10:59:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:01,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 2715 conjuncts, 106 conjunts are in the unsatisfiable core [2022-07-12 10:59:01,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:59:01,256 INFO L390 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 [2022-07-12 10:59:01,426 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 10:59:01,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 10:59:01,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 10:59:01,603 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 10:59:01,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-12 10:59:02,056 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 10:59:02,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 10:59:02,125 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1835 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_1835) |c_#memory_int|)) is different from true [2022-07-12 10:59:02,136 INFO L390 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 24 treesize of output 24 [2022-07-12 10:59:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:59:06,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:59:07,078 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1838 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| v_ArrVal_1838) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.base|))) (<= (mod (select .cse0 |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset|) 18446744073709551616) (mod (select .cse0 (+ |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset| 16)) 18446744073709551616)))) is different from false [2022-07-12 10:59:07,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968065861] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:59:07,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:59:07,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 28] total 38 [2022-07-12 10:59:07,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246772944] [2022-07-12 10:59:07,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:59:07,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-12 10:59:07,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:59:07,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-12 10:59:07,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1642, Unknown=5, NotChecked=166, Total=1980 [2022-07-12 10:59:07,081 INFO L87 Difference]: Start difference. First operand 497 states and 690 transitions. Second operand has 38 states, 36 states have (on average 4.805555555555555) internal successors, (173), 34 states have internal predecessors, (173), 11 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-07-12 10:59:14,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:59:14,493 INFO L93 Difference]: Finished difference Result 828 states and 1176 transitions. [2022-07-12 10:59:14,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-12 10:59:14,493 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 4.805555555555555) internal successors, (173), 34 states have internal predecessors, (173), 11 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 124 [2022-07-12 10:59:14,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:59:14,496 INFO L225 Difference]: With dead ends: 828 [2022-07-12 10:59:14,496 INFO L226 Difference]: Without dead ends: 692 [2022-07-12 10:59:14,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 150 SyntacticMatches, 12 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=412, Invalid=3856, Unknown=30, NotChecked=258, Total=4556 [2022-07-12 10:59:14,497 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 253 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 2232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1122 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 10:59:14,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 1865 Invalid, 2232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 992 Invalid, 0 Unknown, 1122 Unchecked, 0.6s Time] [2022-07-12 10:59:14,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-07-12 10:59:14,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 612. [2022-07-12 10:59:14,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 463 states have (on average 1.1857451403887689) internal successors, (549), 474 states have internal predecessors, (549), 114 states have call successors, (114), 31 states have call predecessors, (114), 34 states have return successors, (217), 106 states have call predecessors, (217), 113 states have call successors, (217) [2022-07-12 10:59:14,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 880 transitions. [2022-07-12 10:59:14,561 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 880 transitions. Word has length 124 [2022-07-12 10:59:14,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:59:14,561 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 880 transitions. [2022-07-12 10:59:14,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 4.805555555555555) internal successors, (173), 34 states have internal predecessors, (173), 11 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-07-12 10:59:14,561 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 880 transitions. [2022-07-12 10:59:14,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-12 10:59:14,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:59:14,563 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:59:14,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-12 10:59:14,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-12 10:59:14,775 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:59:14,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:59:14,775 INFO L85 PathProgramCache]: Analyzing trace with hash -947242963, now seen corresponding path program 1 times [2022-07-12 10:59:14,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:59:14,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071805292] [2022-07-12 10:59:14,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:59:14,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:59:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:15,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:59:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:15,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:59:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:15,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 10:59:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:15,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:59:15,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:15,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 10:59:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:15,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-12 10:59:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:15,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 10:59:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:15,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-12 10:59:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:15,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:59:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:15,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-12 10:59:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:15,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-12 10:59:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-12 10:59:15,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:59:15,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071805292] [2022-07-12 10:59:15,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071805292] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:59:15,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990150514] [2022-07-12 10:59:15,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:59:15,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:59:15,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:59:15,254 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:59:15,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 10:59:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:15,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 2708 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-12 10:59:15,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:59:15,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 10:59:22,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-07-12 10:59:23,089 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1924 Int)) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base|) |c_aws_add_size_checked_#in~r#1.offset| v_ArrVal_1924)) |c_#memory_$Pointer$.base|)) is different from true [2022-07-12 10:59:23,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:59:23,097 INFO L390 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 20 treesize of output 19 [2022-07-12 10:59:25,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 10:59:25,280 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-07-12 10:59:25,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 1 [2022-07-12 10:59:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 10:59:25,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:59:25,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990150514] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:59:25,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:59:25,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [19] total 32 [2022-07-12 10:59:25,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109292500] [2022-07-12 10:59:25,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:59:25,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 10:59:25,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:59:25,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 10:59:25,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=829, Unknown=2, NotChecked=58, Total=992 [2022-07-12 10:59:25,282 INFO L87 Difference]: Start difference. First operand 612 states and 880 transitions. Second operand has 17 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 8 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-12 10:59:25,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:59:25,710 INFO L93 Difference]: Finished difference Result 898 states and 1261 transitions. [2022-07-12 10:59:25,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:59:25,711 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 8 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) Word has length 124 [2022-07-12 10:59:25,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:59:25,713 INFO L225 Difference]: With dead ends: 898 [2022-07-12 10:59:25,714 INFO L226 Difference]: Without dead ends: 703 [2022-07-12 10:59:25,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 124 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=136, Invalid=1198, Unknown=2, NotChecked=70, Total=1406 [2022-07-12 10:59:25,715 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 143 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 611 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 10:59:25,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1035 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 451 Invalid, 0 Unknown, 611 Unchecked, 0.3s Time] [2022-07-12 10:59:25,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-07-12 10:59:25,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 616. [2022-07-12 10:59:25,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 471 states have (on average 1.1719745222929936) internal successors, (552), 484 states have internal predecessors, (552), 108 states have call successors, (108), 31 states have call predecessors, (108), 36 states have return successors, (203), 100 states have call predecessors, (203), 107 states have call successors, (203) [2022-07-12 10:59:25,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 863 transitions. [2022-07-12 10:59:25,788 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 863 transitions. Word has length 124 [2022-07-12 10:59:25,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:59:25,789 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 863 transitions. [2022-07-12 10:59:25,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 8 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-12 10:59:25,789 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 863 transitions. [2022-07-12 10:59:25,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-12 10:59:25,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:59:25,791 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-12 10:59:25,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-12 10:59:25,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-12 10:59:25,998 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:59:25,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:59:25,999 INFO L85 PathProgramCache]: Analyzing trace with hash -164563912, now seen corresponding path program 1 times [2022-07-12 10:59:25,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:59:25,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126330866] [2022-07-12 10:59:25,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:59:25,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:59:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:26,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:59:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:26,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:59:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:26,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 10:59:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:26,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:59:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:26,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 10:59:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:26,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-12 10:59:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:26,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 10:59:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:26,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-12 10:59:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:26,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:59:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:26,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-12 10:59:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:26,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-12 10:59:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-12 10:59:26,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:59:26,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126330866] [2022-07-12 10:59:26,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126330866] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:59:26,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:59:26,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-12 10:59:26,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136222787] [2022-07-12 10:59:26,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:59:26,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 10:59:26,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:59:26,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 10:59:26,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-07-12 10:59:26,193 INFO L87 Difference]: Start difference. First operand 616 states and 863 transitions. Second operand has 12 states, 11 states have (on average 6.090909090909091) internal successors, (67), 8 states have internal predecessors, (67), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-12 10:59:26,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:59:26,763 INFO L93 Difference]: Finished difference Result 640 states and 895 transitions. [2022-07-12 10:59:26,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 10:59:26,764 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.090909090909091) internal successors, (67), 8 states have internal predecessors, (67), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 126 [2022-07-12 10:59:26,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:59:26,766 INFO L225 Difference]: With dead ends: 640 [2022-07-12 10:59:26,766 INFO L226 Difference]: Without dead ends: 638 [2022-07-12 10:59:26,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:59:26,767 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 140 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 10:59:26,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1004 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 10:59:26,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-07-12 10:59:26,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 623. [2022-07-12 10:59:26,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 474 states have (on average 1.1708860759493671) internal successors, (555), 487 states have internal predecessors, (555), 111 states have call successors, (111), 32 states have call predecessors, (111), 37 states have return successors, (206), 103 states have call predecessors, (206), 110 states have call successors, (206) [2022-07-12 10:59:26,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 872 transitions. [2022-07-12 10:59:26,867 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 872 transitions. Word has length 126 [2022-07-12 10:59:26,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:59:26,868 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 872 transitions. [2022-07-12 10:59:26,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.090909090909091) internal successors, (67), 8 states have internal predecessors, (67), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-12 10:59:26,868 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 872 transitions. [2022-07-12 10:59:26,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-12 10:59:26,870 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:59:26,870 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-12 10:59:26,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-12 10:59:26,871 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:59:26,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:59:26,871 INFO L85 PathProgramCache]: Analyzing trace with hash 536500666, now seen corresponding path program 2 times [2022-07-12 10:59:26,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:59:26,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87672399] [2022-07-12 10:59:26,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:59:26,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:59:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:26,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:59:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:26,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:59:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:26,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 10:59:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:27,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:59:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:27,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 10:59:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:27,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-12 10:59:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:27,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 10:59:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:27,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-12 10:59:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:27,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:59:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:27,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-12 10:59:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:27,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-12 10:59:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:59:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 52 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 10:59:27,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:59:27,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87672399] [2022-07-12 10:59:27,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87672399] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:59:27,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647760037] [2022-07-12 10:59:27,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:59:27,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:59:27,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:59:27,186 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:59:27,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 10:59:27,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:59:27,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:59:27,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 2725 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-12 10:59:27,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:59:27,690 INFO L390 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 [2022-07-12 10:59:27,848 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 10:59:27,849 INFO L390 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 [2022-07-12 10:59:27,879 INFO L390 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 [2022-07-12 10:59:28,106 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 10:59:28,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 10:59:28,291 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 10:59:28,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 10:59:28,348 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2060 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_2060) |c_#memory_$Pointer$.base|)) is different from true [2022-07-12 10:59:28,354 INFO L390 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 23 treesize of output 23 [2022-07-12 10:59:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 56 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 10:59:40,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:59:41,544 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2063 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| v_ArrVal_2063) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset| 8)) 0))) is different from false [2022-07-12 10:59:41,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647760037] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:59:41,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:59:41,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 26] total 37 [2022-07-12 10:59:41,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080277283] [2022-07-12 10:59:41,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:59:41,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 10:59:41,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:59:41,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 10:59:41,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2018, Unknown=3, NotChecked=182, Total=2352 [2022-07-12 10:59:41,546 INFO L87 Difference]: Start difference. First operand 623 states and 872 transitions. Second operand has 37 states, 35 states have (on average 4.6571428571428575) internal successors, (163), 31 states have internal predecessors, (163), 11 states have call successors, (24), 10 states have call predecessors, (24), 9 states have return successors, (22), 12 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-12 11:00:02,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:00:02,084 INFO L93 Difference]: Finished difference Result 1233 states and 1823 transitions. [2022-07-12 11:00:02,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-12 11:00:02,084 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 4.6571428571428575) internal successors, (163), 31 states have internal predecessors, (163), 11 states have call successors, (24), 10 states have call predecessors, (24), 9 states have return successors, (22), 12 states have call predecessors, (22), 9 states have call successors, (22) Word has length 126 [2022-07-12 11:00:02,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:00:02,088 INFO L225 Difference]: With dead ends: 1233 [2022-07-12 11:00:02,088 INFO L226 Difference]: Without dead ends: 1104 [2022-07-12 11:00:02,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 165 SyntacticMatches, 10 SemanticMatches, 100 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2424 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=793, Invalid=9076, Unknown=39, NotChecked=394, Total=10302 [2022-07-12 11:00:02,090 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 512 mSDsluCounter, 3362 mSDsCounter, 0 mSdLazyCounter, 5123 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 3646 SdHoareTripleChecker+Invalid, 8673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 5123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3113 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-12 11:00:02,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 3646 Invalid, 8673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 5123 Invalid, 0 Unknown, 3113 Unchecked, 2.7s Time] [2022-07-12 11:00:02,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-07-12 11:00:02,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 692. [2022-07-12 11:00:02,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 531 states have (on average 1.1694915254237288) internal successors, (621), 551 states have internal predecessors, (621), 117 states have call successors, (117), 33 states have call predecessors, (117), 43 states have return successors, (225), 107 states have call predecessors, (225), 116 states have call successors, (225) [2022-07-12 11:00:02,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 963 transitions. [2022-07-12 11:00:02,166 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 963 transitions. Word has length 126 [2022-07-12 11:00:02,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:00:02,166 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 963 transitions. [2022-07-12 11:00:02,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 4.6571428571428575) internal successors, (163), 31 states have internal predecessors, (163), 11 states have call successors, (24), 10 states have call predecessors, (24), 9 states have return successors, (22), 12 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-12 11:00:02,166 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 963 transitions. [2022-07-12 11:00:02,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-12 11:00:02,168 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:00:02,168 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:00:02,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-12 11:00:02,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:00:02,384 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:00:02,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:00:02,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1394429517, now seen corresponding path program 1 times [2022-07-12 11:00:02,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:00:02,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556466865] [2022-07-12 11:00:02,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:00:02,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:00:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:02,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 11:00:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:02,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 11:00:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:02,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 11:00:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:02,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 11:00:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:02,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 11:00:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:02,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-12 11:00:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:02,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 11:00:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:02,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-12 11:00:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:02,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 11:00:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:02,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-12 11:00:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:02,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-07-12 11:00:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-12 11:00:02,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:00:02,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556466865] [2022-07-12 11:00:02,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556466865] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 11:00:02,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099608627] [2022-07-12 11:00:02,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:00:02,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:00:02,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:00:02,548 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:00:02,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-12 11:00:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:02,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 2715 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-12 11:00:02,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:00:02,964 INFO L390 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 [2022-07-12 11:00:03,106 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 11:00:03,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 11:00:03,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 11:00:03,230 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 11:00:03,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-12 11:00:03,476 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 11:00:03,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 11:00:03,530 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2151 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_2151) |c_#memory_int|)) is different from true [2022-07-12 11:00:03,536 INFO L390 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 19 treesize of output 21 [2022-07-12 11:00:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 34 proven. 60 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 11:00:07,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:00:08,112 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2154 (Array Int Int))) (< 0 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| v_ArrVal_2154) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset| 16)) 18446744073709551616))) is different from false [2022-07-12 11:00:08,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099608627] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 11:00:08,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 11:00:08,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 24] total 31 [2022-07-12 11:00:08,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213636940] [2022-07-12 11:00:08,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 11:00:08,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-12 11:00:08,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:00:08,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-12 11:00:08,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1079, Unknown=3, NotChecked=134, Total=1332 [2022-07-12 11:00:08,115 INFO L87 Difference]: Start difference. First operand 692 states and 963 transitions. Second operand has 31 states, 29 states have (on average 5.655172413793103) internal successors, (164), 27 states have internal predecessors, (164), 10 states have call successors, (23), 8 states have call predecessors, (23), 8 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-07-12 11:00:20,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:00:20,240 INFO L93 Difference]: Finished difference Result 1178 states and 1678 transitions. [2022-07-12 11:00:20,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-12 11:00:20,241 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 5.655172413793103) internal successors, (164), 27 states have internal predecessors, (164), 10 states have call successors, (23), 8 states have call predecessors, (23), 8 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 128 [2022-07-12 11:00:20,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:00:20,244 INFO L225 Difference]: With dead ends: 1178 [2022-07-12 11:00:20,244 INFO L226 Difference]: Without dead ends: 847 [2022-07-12 11:00:20,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 165 SyntacticMatches, 12 SemanticMatches, 61 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=358, Invalid=3288, Unknown=22, NotChecked=238, Total=3906 [2022-07-12 11:00:20,245 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 288 mSDsluCounter, 2570 mSDsCounter, 0 mSdLazyCounter, 2509 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 2829 SdHoareTripleChecker+Invalid, 4053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1343 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-12 11:00:20,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 2829 Invalid, 4053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2509 Invalid, 0 Unknown, 1343 Unchecked, 1.3s Time] [2022-07-12 11:00:20,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-07-12 11:00:20,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 661. [2022-07-12 11:00:20,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 505 states have (on average 1.1623762376237623) internal successors, (587), 522 states have internal predecessors, (587), 114 states have call successors, (114), 31 states have call predecessors, (114), 41 states have return successors, (212), 107 states have call predecessors, (212), 113 states have call successors, (212) [2022-07-12 11:00:20,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 913 transitions. [2022-07-12 11:00:20,317 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 913 transitions. Word has length 128 [2022-07-12 11:00:20,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:00:20,317 INFO L495 AbstractCegarLoop]: Abstraction has 661 states and 913 transitions. [2022-07-12 11:00:20,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 5.655172413793103) internal successors, (164), 27 states have internal predecessors, (164), 10 states have call successors, (23), 8 states have call predecessors, (23), 8 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-07-12 11:00:20,317 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 913 transitions. [2022-07-12 11:00:20,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-12 11:00:20,319 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:00:20,319 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:00:20,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-12 11:00:20,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:00:20,532 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:00:20,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:00:20,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1458198455, now seen corresponding path program 1 times [2022-07-12 11:00:20,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:00:20,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901593378] [2022-07-12 11:00:20,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:00:20,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:00:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:20,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 11:00:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:20,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 11:00:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:20,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 11:00:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:20,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 11:00:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:20,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 11:00:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:20,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-12 11:00:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:20,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 11:00:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:20,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-12 11:00:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:20,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 11:00:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:20,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 11:00:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:20,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-12 11:00:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:20,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-12 11:00:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:20,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-12 11:00:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-12 11:00:20,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:00:20,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901593378] [2022-07-12 11:00:20,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901593378] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 11:00:20,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431648115] [2022-07-12 11:00:20,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:00:20,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:00:20,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:00:20,856 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:00:20,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-12 11:00:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:21,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 2705 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-12 11:00:21,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:00:21,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 11:00:21,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-07-12 11:00:21,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 11:00:21,546 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-07-12 11:00:21,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 1 [2022-07-12 11:00:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-12 11:00:21,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 11:00:21,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431648115] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 11:00:21,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 11:00:21,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [15] total 20 [2022-07-12 11:00:21,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990232898] [2022-07-12 11:00:21,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 11:00:21,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 11:00:21,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:00:21,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 11:00:21,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-07-12 11:00:21,548 INFO L87 Difference]: Start difference. First operand 661 states and 913 transitions. Second operand has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 12 states have internal predecessors, (87), 6 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2022-07-12 11:00:22,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:00:22,076 INFO L93 Difference]: Finished difference Result 740 states and 994 transitions. [2022-07-12 11:00:22,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 11:00:22,077 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 12 states have internal predecessors, (87), 6 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 131 [2022-07-12 11:00:22,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:00:22,079 INFO L225 Difference]: With dead ends: 740 [2022-07-12 11:00:22,079 INFO L226 Difference]: Without dead ends: 665 [2022-07-12 11:00:22,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 145 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-07-12 11:00:22,080 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 106 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 680 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 11:00:22,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 1396 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 715 Invalid, 0 Unknown, 680 Unchecked, 0.4s Time] [2022-07-12 11:00:22,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-07-12 11:00:22,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 659. [2022-07-12 11:00:22,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 503 states have (on average 1.1590457256461233) internal successors, (583), 520 states have internal predecessors, (583), 114 states have call successors, (114), 31 states have call predecessors, (114), 41 states have return successors, (211), 107 states have call predecessors, (211), 113 states have call successors, (211) [2022-07-12 11:00:22,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 908 transitions. [2022-07-12 11:00:22,148 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 908 transitions. Word has length 131 [2022-07-12 11:00:22,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:00:22,148 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 908 transitions. [2022-07-12 11:00:22,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 12 states have internal predecessors, (87), 6 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2022-07-12 11:00:22,148 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 908 transitions. [2022-07-12 11:00:22,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-12 11:00:22,149 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:00:22,149 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 11:00:22,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-12 11:00:22,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-07-12 11:00:22,350 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:00:22,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:00:22,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1613934016, now seen corresponding path program 1 times [2022-07-12 11:00:22,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:00:22,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994657977] [2022-07-12 11:00:22,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:00:22,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:00:22,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:22,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 11:00:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:22,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 11:00:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:22,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 11:00:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:22,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 11:00:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:22,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 11:00:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:22,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-12 11:00:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:22,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 11:00:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:22,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-12 11:00:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:22,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 11:00:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:22,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-12 11:00:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:22,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-07-12 11:00:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:22,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-12 11:00:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:22,496 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-12 11:00:22,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:00:22,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994657977] [2022-07-12 11:00:22,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994657977] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 11:00:22,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125934303] [2022-07-12 11:00:22,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:00:22,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:00:22,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:00:22,497 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:00:22,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-12 11:00:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:22,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 2745 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-12 11:00:22,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:00:22,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 11:00:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 61 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 11:00:23,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:00:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-12 11:00:23,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125934303] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 11:00:23,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 11:00:23,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 19, 6] total 25 [2022-07-12 11:00:23,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842261070] [2022-07-12 11:00:23,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 11:00:23,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 11:00:23,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:00:23,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 11:00:23,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-07-12 11:00:23,592 INFO L87 Difference]: Start difference. First operand 659 states and 908 transitions. Second operand has 25 states, 25 states have (on average 5.72) internal successors, (143), 17 states have internal predecessors, (143), 5 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (22), 9 states have call predecessors, (22), 5 states have call successors, (22) [2022-07-12 11:00:24,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:00:24,285 INFO L93 Difference]: Finished difference Result 743 states and 996 transitions. [2022-07-12 11:00:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 11:00:24,285 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.72) internal successors, (143), 17 states have internal predecessors, (143), 5 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (22), 9 states have call predecessors, (22), 5 states have call successors, (22) Word has length 130 [2022-07-12 11:00:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:00:24,288 INFO L225 Difference]: With dead ends: 743 [2022-07-12 11:00:24,288 INFO L226 Difference]: Without dead ends: 661 [2022-07-12 11:00:24,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 261 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 11:00:24,289 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 134 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 810 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 11:00:24,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1480 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1095 Invalid, 0 Unknown, 810 Unchecked, 0.5s Time] [2022-07-12 11:00:24,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-07-12 11:00:24,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 659. [2022-07-12 11:00:24,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 503 states have (on average 1.1550695825049702) internal successors, (581), 520 states have internal predecessors, (581), 114 states have call successors, (114), 31 states have call predecessors, (114), 41 states have return successors, (211), 107 states have call predecessors, (211), 113 states have call successors, (211) [2022-07-12 11:00:24,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 906 transitions. [2022-07-12 11:00:24,376 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 906 transitions. Word has length 130 [2022-07-12 11:00:24,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:00:24,378 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 906 transitions. [2022-07-12 11:00:24,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.72) internal successors, (143), 17 states have internal predecessors, (143), 5 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (22), 9 states have call predecessors, (22), 5 states have call successors, (22) [2022-07-12 11:00:24,378 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 906 transitions. [2022-07-12 11:00:24,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-12 11:00:24,380 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:00:24,380 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2022-07-12 11:00:24,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-12 11:00:24,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-07-12 11:00:24,593 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:00:24,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:00:24,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1542984964, now seen corresponding path program 1 times [2022-07-12 11:00:24,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:00:24,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860201892] [2022-07-12 11:00:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:00:24,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:00:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:24,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 11:00:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:24,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 11:00:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:24,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 11:00:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:24,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 11:00:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:24,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 11:00:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:24,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-12 11:00:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:24,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 11:00:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:24,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-12 11:00:24,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:24,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 11:00:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:24,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-12 11:00:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:24,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-12 11:00:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:24,859 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 60 proven. 7 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-12 11:00:24,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:00:24,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860201892] [2022-07-12 11:00:24,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860201892] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 11:00:24,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523934194] [2022-07-12 11:00:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:00:24,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:00:24,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:00:24,862 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:00:24,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-12 11:00:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:25,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 2714 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-12 11:00:25,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:00:25,595 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2385 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_2385) |c_#memory_int|)) is different from true [2022-07-12 11:00:25,610 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 11:00:25,610 INFO L390 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 26 treesize of output 30 [2022-07-12 11:00:26,132 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 35 proven. 47 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 11:00:26,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:00:26,803 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 11:00:26,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523934194] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 11:00:26,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 11:00:26,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 11] total 39 [2022-07-12 11:00:26,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753108978] [2022-07-12 11:00:26,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 11:00:26,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-12 11:00:26,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:00:26,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-12 11:00:26,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1267, Unknown=1, NotChecked=72, Total=1482 [2022-07-12 11:00:26,805 INFO L87 Difference]: Start difference. First operand 659 states and 906 transitions. Second operand has 39 states, 38 states have (on average 4.7631578947368425) internal successors, (181), 35 states have internal predecessors, (181), 11 states have call successors, (26), 6 states have call predecessors, (26), 8 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2022-07-12 11:00:32,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 11:00:32,419 INFO L93 Difference]: Finished difference Result 1142 states and 1654 transitions. [2022-07-12 11:00:32,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-12 11:00:32,419 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 4.7631578947368425) internal successors, (181), 35 states have internal predecessors, (181), 11 states have call successors, (26), 6 states have call predecessors, (26), 8 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) Word has length 130 [2022-07-12 11:00:32,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 11:00:32,423 INFO L225 Difference]: With dead ends: 1142 [2022-07-12 11:00:32,423 INFO L226 Difference]: Without dead ends: 1002 [2022-07-12 11:00:32,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 257 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=660, Invalid=3765, Unknown=1, NotChecked=130, Total=4556 [2022-07-12 11:00:32,424 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 641 mSDsluCounter, 3492 mSDsCounter, 0 mSdLazyCounter, 5392 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 3888 SdHoareTripleChecker+Invalid, 7374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 5392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1563 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-12 11:00:32,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [713 Valid, 3888 Invalid, 7374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 5392 Invalid, 0 Unknown, 1563 Unchecked, 3.7s Time] [2022-07-12 11:00:32,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2022-07-12 11:00:32,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 690. [2022-07-12 11:00:32,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 528 states have (on average 1.1590909090909092) internal successors, (612), 546 states have internal predecessors, (612), 119 states have call successors, (119), 32 states have call predecessors, (119), 42 states have return successors, (212), 111 states have call predecessors, (212), 118 states have call successors, (212) [2022-07-12 11:00:32,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 943 transitions. [2022-07-12 11:00:32,525 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 943 transitions. Word has length 130 [2022-07-12 11:00:32,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 11:00:32,525 INFO L495 AbstractCegarLoop]: Abstraction has 690 states and 943 transitions. [2022-07-12 11:00:32,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 4.7631578947368425) internal successors, (181), 35 states have internal predecessors, (181), 11 states have call successors, (26), 6 states have call predecessors, (26), 8 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2022-07-12 11:00:32,525 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 943 transitions. [2022-07-12 11:00:32,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-12 11:00:32,527 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 11:00:32,527 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-07-12 11:00:32,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-12 11:00:32,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:00:32,741 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 11:00:32,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 11:00:32,741 INFO L85 PathProgramCache]: Analyzing trace with hash -2050382458, now seen corresponding path program 1 times [2022-07-12 11:00:32,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 11:00:32,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926321207] [2022-07-12 11:00:32,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:00:32,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 11:00:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:32,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 11:00:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:32,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 11:00:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:32,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 11:00:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:32,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 11:00:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:32,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 11:00:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:33,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-12 11:00:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:33,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 11:00:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:33,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-12 11:00:33,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:33,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 11:00:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:33,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-12 11:00:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:33,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-12 11:00:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:33,208 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-12 11:00:33,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 11:00:33,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926321207] [2022-07-12 11:00:33,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926321207] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 11:00:33,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893151183] [2022-07-12 11:00:33,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 11:00:33,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 11:00:33,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 11:00:33,210 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 11:00:33,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-12 11:00:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 11:00:33,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 2719 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-12 11:00:33,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 11:00:33,666 INFO L390 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 [2022-07-12 11:00:33,849 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 11:00:33,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-12 11:00:34,199 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 11:00:34,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-12 11:00:34,381 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 11:00:34,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 11:00:34,474 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2474 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_2474) |c_#memory_int|)) is different from true [2022-07-12 11:00:34,482 INFO L390 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 16 treesize of output 18 [2022-07-12 11:00:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 19 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 11:00:35,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 11:00:35,756 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2477 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| v_ArrVal_2477) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.base|))) (let ((.cse0 (mod (select .cse1 (+ |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset| 16)) 18446744073709551616))) (or (not (< .cse0 (mod (select .cse1 |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset|) 18446744073709551616))) (= .cse0 0))))) is different from false [2022-07-12 11:00:35,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893151183] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 11:00:35,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 11:00:35,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 44 [2022-07-12 11:00:35,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919361984] [2022-07-12 11:00:35,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 11:00:35,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-12 11:00:35,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 11:00:35,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-12 11:00:35,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2348, Unknown=2, NotChecked=198, Total=2756 [2022-07-12 11:00:35,766 INFO L87 Difference]: Start difference. First operand 690 states and 943 transitions. Second operand has 44 states, 42 states have (on average 4.309523809523809) internal successors, (181), 39 states have internal predecessors, (181), 15 states have call successors, (22), 9 states have call predecessors, (22), 12 states have return successors, (21), 13 states have call predecessors, (21), 15 states have call successors, (21)