./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_array_list_init_dynamic_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_array_list_init_dynamic_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 ffbf3b1479afd9aaa2ec45fcd2782998a39316f97238379433376f7ba5094eb5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 22:04:25,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 22:04:25,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 22:04:25,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 22:04:25,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 22:04:25,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 22:04:25,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 22:04:25,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 22:04:25,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 22:04:25,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 22:04:25,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 22:04:25,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 22:04:25,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 22:04:25,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 22:04:25,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 22:04:25,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 22:04:25,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 22:04:25,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 22:04:25,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 22:04:25,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 22:04:25,972 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 22:04:25,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 22:04:25,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 22:04:25,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 22:04:25,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 22:04:25,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 22:04:25,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 22:04:25,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 22:04:25,984 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 22:04:25,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 22:04:25,985 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 22:04:25,985 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 22:04:25,987 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 22:04:25,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 22:04:25,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 22:04:25,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 22:04:25,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 22:04:25,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 22:04:25,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 22:04:25,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 22:04:25,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 22:04:25,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 22:04:25,994 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-22 22:04:26,029 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 22:04:26,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 22:04:26,030 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 22:04:26,030 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 22:04:26,031 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 22:04:26,031 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 22:04:26,033 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 22:04:26,033 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 22:04:26,033 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 22:04:26,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 22:04:26,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 22:04:26,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 22:04:26,034 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 22:04:26,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 22:04:26,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 22:04:26,035 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 22:04:26,035 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 22:04:26,035 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 22:04:26,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 22:04:26,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 22:04:26,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 22:04:26,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 22:04:26,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 22:04:26,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 22:04:26,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 22:04:26,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 22:04:26,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 22:04:26,040 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 22:04:26,040 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 22:04:26,041 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 22:04:26,041 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ffbf3b1479afd9aaa2ec45fcd2782998a39316f97238379433376f7ba5094eb5 [2022-07-22 22:04:26,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 22:04:26,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 22:04:26,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 22:04:26,273 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 22:04:26,273 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 22:04:26,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_array_list_init_dynamic_harness.i [2022-07-22 22:04:26,323 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc3fc5683/a91cf8dfb1e14787b4ba81bdac691cb9/FLAG9a8975817 [2022-07-22 22:04:27,000 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 22:04:27,001 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_init_dynamic_harness.i [2022-07-22 22:04:27,031 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc3fc5683/a91cf8dfb1e14787b4ba81bdac691cb9/FLAG9a8975817 [2022-07-22 22:04:27,343 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc3fc5683/a91cf8dfb1e14787b4ba81bdac691cb9 [2022-07-22 22:04:27,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 22:04:27,346 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 22:04:27,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 22:04:27,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 22:04:27,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 22:04:27,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:04:27" (1/1) ... [2022-07-22 22:04:27,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32ad8c44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:27, skipping insertion in model container [2022-07-22 22:04:27,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:04:27" (1/1) ... [2022-07-22 22:04:27,361 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 22:04:27,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 22:04:27,632 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_init_dynamic_harness.i[4501,4514] [2022-07-22 22:04:27,637 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_init_dynamic_harness.i[4561,4574] [2022-07-22 22:04:28,179 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-22 22:04:28,232 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,232 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,233 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,237 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,238 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,252 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,255 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,257 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,257 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,259 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,260 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,261 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,263 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,508 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-22 22:04:28,509 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-22 22:04:28,509 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-22 22:04:28,513 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-22 22:04:28,515 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-22 22:04:28,515 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-22 22:04:28,516 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-22 22:04:28,517 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-22 22:04:28,518 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-22 22:04:28,519 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-22 22:04:28,673 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,684 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,731 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 22:04:28,753 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 22:04:28,764 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_init_dynamic_harness.i[4501,4514] [2022-07-22 22:04:28,765 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_init_dynamic_harness.i[4561,4574] [2022-07-22 22:04:28,797 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-22 22:04:28,808 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,811 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,812 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,812 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,813 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,817 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,818 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,819 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,819 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,820 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,820 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,821 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,821 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,846 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-22 22:04:28,847 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-22 22:04:28,847 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-22 22:04:28,848 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-22 22:04:28,849 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-22 22:04:28,849 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-22 22:04:28,849 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-22 22:04:28,850 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-22 22:04:28,850 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-22 22:04:28,851 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-22 22:04:28,864 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,868 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:04:28,887 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 22:04:29,072 INFO L208 MainTranslator]: Completed translation [2022-07-22 22:04:29,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:29 WrapperNode [2022-07-22 22:04:29,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 22:04:29,074 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 22:04:29,075 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 22:04:29,075 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 22:04:29,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:29" (1/1) ... [2022-07-22 22:04:29,165 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:29" (1/1) ... [2022-07-22 22:04:29,236 INFO L137 Inliner]: procedures = 690, calls = 1561, calls flagged for inlining = 47, calls inlined = 6, statements flattened = 595 [2022-07-22 22:04:29,237 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 22:04:29,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 22:04:29,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 22:04:29,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 22:04:29,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:29" (1/1) ... [2022-07-22 22:04:29,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:29" (1/1) ... [2022-07-22 22:04:29,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:29" (1/1) ... [2022-07-22 22:04:29,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:29" (1/1) ... [2022-07-22 22:04:29,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:29" (1/1) ... [2022-07-22 22:04:29,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:29" (1/1) ... [2022-07-22 22:04:29,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:29" (1/1) ... [2022-07-22 22:04:29,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 22:04:29,317 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 22:04:29,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 22:04:29,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 22:04:29,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:29" (1/1) ... [2022-07-22 22:04:29,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 22:04:29,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:04:29,360 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) [2022-07-22 22:04:29,382 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 [2022-07-22 22:04:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-07-22 22:04:29,404 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-07-22 22:04:29,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 22:04:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2022-07-22 22:04:29,405 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2022-07-22 22:04:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-07-22 22:04:29,406 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-07-22 22:04:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2022-07-22 22:04:29,406 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2022-07-22 22:04:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 22:04:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-07-22 22:04:29,407 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-07-22 22:04:29,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 22:04:29,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 22:04:29,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 22:04:29,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 22:04:29,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 22:04:29,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 22:04:29,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 22:04:29,408 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-07-22 22:04:29,408 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-07-22 22:04:29,409 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2022-07-22 22:04:29,409 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2022-07-22 22:04:29,409 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2022-07-22 22:04:29,409 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2022-07-22 22:04:29,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-22 22:04:29,410 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-22 22:04:29,410 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-22 22:04:29,410 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-22 22:04:29,410 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2022-07-22 22:04:29,410 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2022-07-22 22:04:29,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 22:04:29,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 22:04:29,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-22 22:04:29,411 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-07-22 22:04:29,411 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-07-22 22:04:29,411 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2022-07-22 22:04:29,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2022-07-22 22:04:29,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 22:04:29,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 22:04:29,685 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 22:04:29,687 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 22:04:30,380 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 22:04:30,396 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 22:04:30,396 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 22:04:30,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:04:30 BoogieIcfgContainer [2022-07-22 22:04:30,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 22:04:30,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 22:04:30,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 22:04:30,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 22:04:30,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 10:04:27" (1/3) ... [2022-07-22 22:04:30,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2741be1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:04:30, skipping insertion in model container [2022-07-22 22:04:30,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:29" (2/3) ... [2022-07-22 22:04:30,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2741be1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:04:30, skipping insertion in model container [2022-07-22 22:04:30,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:04:30" (3/3) ... [2022-07-22 22:04:30,406 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_list_init_dynamic_harness.i [2022-07-22 22:04:30,418 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 22:04:30,418 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 22:04:30,488 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 22:04:30,498 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@3c2f538, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3a61921f [2022-07-22 22:04:30,499 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 22:04:30,502 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 88 states have (on average 1.2272727272727273) internal successors, (108), 89 states have internal predecessors, (108), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-22 22:04:30,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 22:04:30,511 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:04:30,512 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:04:30,514 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:04:30,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:04:30,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1457384713, now seen corresponding path program 1 times [2022-07-22 22:04:30,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:04:30,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100310805] [2022-07-22 22:04:30,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:04:30,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:04:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:04:31,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 22:04:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:04:31,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 22:04:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:04:31,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:04:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:04:31,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 22:04:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:04:31,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 22:04:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:04:31,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-22 22:04:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:04:31,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 22:04:31,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:04:31,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100310805] [2022-07-22 22:04:31,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-07-22 22:04:31,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142199272] [2022-07-22 22:04:31,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:04:31,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:04:31,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:04:31,167 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) [2022-07-22 22:04:31,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 22:04:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:04:31,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 1973 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-22 22:04:31,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:04:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 22:04:31,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:04:31,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142199272] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:04:31,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:04:31,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 22:04:31,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105577227] [2022-07-22 22:04:31,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:04:31,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 22:04:31,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:04:31,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 22:04:31,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 22:04:31,653 INFO L87 Difference]: Start difference. First operand has 137 states, 88 states have (on average 1.2272727272727273) internal successors, (108), 89 states have internal predecessors, (108), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 22:04:31,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:04:31,708 INFO L93 Difference]: Finished difference Result 269 states and 367 transitions. [2022-07-22 22:04:31,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 22:04:31,711 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2022-07-22 22:04:31,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:04:31,725 INFO L225 Difference]: With dead ends: 269 [2022-07-22 22:04:31,725 INFO L226 Difference]: Without dead ends: 130 [2022-07-22 22:04:31,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 22:04:31,738 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 22:04:31,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 22:04:31,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-22 22:04:31,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-07-22 22:04:31,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 83 states have internal predecessors, (97), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-22 22:04:31,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 163 transitions. [2022-07-22 22:04:31,791 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 163 transitions. Word has length 54 [2022-07-22 22:04:31,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:04:31,796 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 163 transitions. [2022-07-22 22:04:31,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 22:04:31,796 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 163 transitions. [2022-07-22 22:04:31,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 22:04:31,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:04:31,798 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:04:31,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 22:04:32,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-22 22:04:32,002 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:04:32,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:04:32,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1798443805, now seen corresponding path program 1 times [2022-07-22 22:04:32,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:04:32,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748266382] [2022-07-22 22:04:32,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:04:32,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:04:32,059 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:04:32,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472405937] [2022-07-22 22:04:32,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:04:32,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:04:32,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:04:32,062 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) [2022-07-22 22:04:32,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 22:04:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:04:32,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 2001 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 22:04:32,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:04:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-22 22:04:32,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:04:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 22:04:32,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:04:32,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748266382] [2022-07-22 22:04:32,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:04:32,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472405937] [2022-07-22 22:04:32,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472405937] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 22:04:32,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 22:04:32,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2022-07-22 22:04:32,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181963936] [2022-07-22 22:04:32,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:04:32,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 22:04:32,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:04:32,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 22:04:32,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-07-22 22:04:32,749 INFO L87 Difference]: Start difference. First operand 130 states and 163 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-07-22 22:04:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:04:32,801 INFO L93 Difference]: Finished difference Result 138 states and 171 transitions. [2022-07-22 22:04:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 22:04:32,801 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 60 [2022-07-22 22:04:32,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:04:32,803 INFO L225 Difference]: With dead ends: 138 [2022-07-22 22:04:32,803 INFO L226 Difference]: Without dead ends: 136 [2022-07-22 22:04:32,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-07-22 22:04:32,804 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 6 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 22:04:32,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 627 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 22:04:32,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-22 22:04:32,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-07-22 22:04:32,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 87 states have internal predecessors, (100), 35 states have call successors, (35), 15 states have call predecessors, (35), 15 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-22 22:04:32,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 168 transitions. [2022-07-22 22:04:32,817 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 168 transitions. Word has length 60 [2022-07-22 22:04:32,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:04:32,817 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 168 transitions. [2022-07-22 22:04:32,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-07-22 22:04:32,817 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 168 transitions. [2022-07-22 22:04:32,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 22:04:32,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:04:32,819 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:04:32,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 22:04:33,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-07-22 22:04:33,036 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:04:33,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:04:33,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1800290847, now seen corresponding path program 1 times [2022-07-22 22:04:33,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:04:33,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532122633] [2022-07-22 22:04:33,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:04:33,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:04:33,110 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:04:33,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1662628776] [2022-07-22 22:04:33,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:04:33,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:04:33,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:04:33,117 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) [2022-07-22 22:04:33,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 22:04:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:04:33,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 2006 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 22:04:33,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:04:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 22:04:33,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:04:33,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:04:33,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532122633] [2022-07-22 22:04:33,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:04:33,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662628776] [2022-07-22 22:04:33,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662628776] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:04:33,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:04:33,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 22:04:33,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659864265] [2022-07-22 22:04:33,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:04:33,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 22:04:33,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:04:33,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 22:04:33,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 22:04:33,522 INFO L87 Difference]: Start difference. First operand 135 states and 168 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-22 22:04:33,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:04:33,546 INFO L93 Difference]: Finished difference Result 258 states and 318 transitions. [2022-07-22 22:04:33,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 22:04:33,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 60 [2022-07-22 22:04:33,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:04:33,549 INFO L225 Difference]: With dead ends: 258 [2022-07-22 22:04:33,549 INFO L226 Difference]: Without dead ends: 136 [2022-07-22 22:04:33,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 22:04:33,550 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 2 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 22:04:33,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 481 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 22:04:33,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-22 22:04:33,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-07-22 22:04:33,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 85 states have (on average 1.188235294117647) internal successors, (101), 88 states have internal predecessors, (101), 35 states have call successors, (35), 15 states have call predecessors, (35), 15 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-22 22:04:33,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 169 transitions. [2022-07-22 22:04:33,560 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 169 transitions. Word has length 60 [2022-07-22 22:04:33,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:04:33,561 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 169 transitions. [2022-07-22 22:04:33,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-22 22:04:33,561 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 169 transitions. [2022-07-22 22:04:33,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-22 22:04:33,562 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:04:33,562 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:04:33,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 22:04:33,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:04:33,776 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:04:33,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:04:33,776 INFO L85 PathProgramCache]: Analyzing trace with hash 169080727, now seen corresponding path program 1 times [2022-07-22 22:04:33,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:04:33,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78254346] [2022-07-22 22:04:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:04:33,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:04:33,826 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:04:33,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157791909] [2022-07-22 22:04:33,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:04:33,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:04:33,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:04:33,828 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) [2022-07-22 22:04:33,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 22:04:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:04:34,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 2025 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 22:04:34,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:04:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 22:04:34,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:04:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 22:04:34,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:04:34,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78254346] [2022-07-22 22:04:34,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:04:34,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157791909] [2022-07-22 22:04:34,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157791909] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:04:34,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:04:34,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-22 22:04:34,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539577141] [2022-07-22 22:04:34,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:04:34,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 22:04:34,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:04:34,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 22:04:34,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 22:04:34,362 INFO L87 Difference]: Start difference. First operand 136 states and 169 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-22 22:04:34,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:04:34,451 INFO L93 Difference]: Finished difference Result 263 states and 325 transitions. [2022-07-22 22:04:34,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 22:04:34,452 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 61 [2022-07-22 22:04:34,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:04:34,453 INFO L225 Difference]: With dead ends: 263 [2022-07-22 22:04:34,453 INFO L226 Difference]: Without dead ends: 139 [2022-07-22 22:04:34,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-07-22 22:04:34,454 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 11 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 22:04:34,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 484 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 22:04:34,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-22 22:04:34,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-07-22 22:04:34,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 88 states have (on average 1.1818181818181819) internal successors, (104), 91 states have internal predecessors, (104), 35 states have call successors, (35), 15 states have call predecessors, (35), 15 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-22 22:04:34,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 172 transitions. [2022-07-22 22:04:34,464 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 172 transitions. Word has length 61 [2022-07-22 22:04:34,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:04:34,465 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 172 transitions. [2022-07-22 22:04:34,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-22 22:04:34,465 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 172 transitions. [2022-07-22 22:04:34,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-22 22:04:34,466 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:04:34,466 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:04:34,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 22:04:34,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:04:34,691 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:04:34,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:04:34,692 INFO L85 PathProgramCache]: Analyzing trace with hash -909385697, now seen corresponding path program 2 times [2022-07-22 22:04:34,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:04:34,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274101447] [2022-07-22 22:04:34,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:04:34,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:04:34,766 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:04:34,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993954535] [2022-07-22 22:04:34,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 22:04:34,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:04:34,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:04:34,775 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) [2022-07-22 22:04:34,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 22:04:36,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 22:04:36,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:04:36,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 2082 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 22:04:36,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:04:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 22:04:36,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:04:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 22:04:37,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:04:37,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274101447] [2022-07-22 22:04:37,063 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:04:37,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993954535] [2022-07-22 22:04:37,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993954535] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:04:37,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:04:37,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-22 22:04:37,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597012440] [2022-07-22 22:04:37,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:04:37,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 22:04:37,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:04:37,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 22:04:37,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-22 22:04:37,066 INFO L87 Difference]: Start difference. First operand 139 states and 172 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-22 22:04:38,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:04:38,053 INFO L93 Difference]: Finished difference Result 269 states and 334 transitions. [2022-07-22 22:04:38,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 22:04:38,054 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 64 [2022-07-22 22:04:38,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:04:38,055 INFO L225 Difference]: With dead ends: 269 [2022-07-22 22:04:38,055 INFO L226 Difference]: Without dead ends: 145 [2022-07-22 22:04:38,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2022-07-22 22:04:38,057 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 25 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:04:38,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 1585 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:04:38,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-07-22 22:04:38,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-07-22 22:04:38,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 94 states have (on average 1.1702127659574468) internal successors, (110), 97 states have internal predecessors, (110), 35 states have call successors, (35), 15 states have call predecessors, (35), 15 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-22 22:04:38,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 178 transitions. [2022-07-22 22:04:38,067 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 178 transitions. Word has length 64 [2022-07-22 22:04:38,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:04:38,068 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 178 transitions. [2022-07-22 22:04:38,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-22 22:04:38,068 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 178 transitions. [2022-07-22 22:04:38,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-22 22:04:38,069 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:04:38,069 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:04:38,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 22:04:38,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:04:38,279 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:04:38,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:04:38,280 INFO L85 PathProgramCache]: Analyzing trace with hash -555602657, now seen corresponding path program 3 times [2022-07-22 22:04:38,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:04:38,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999372349] [2022-07-22 22:04:38,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:04:38,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:04:38,360 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:04:38,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182766338] [2022-07-22 22:04:38,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 22:04:38,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:04:38,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:04:38,368 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) [2022-07-22 22:04:38,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 22:04:45,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-22 22:04:45,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:04:45,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 2196 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-22 22:04:45,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:04:45,244 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 [2022-07-22 22:04:45,583 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 [2022-07-22 22:04:45,624 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 22:04:45,624 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 23 treesize of output 22 [2022-07-22 22:04:45,704 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 22:04:45,704 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 [2022-07-22 22:04:45,759 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_604 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_604) |c_#memory_int|)) is different from true [2022-07-22 22:04:45,770 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 [2022-07-22 22:04:45,800 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 39 treesize of output 21 [2022-07-22 22:04:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 22:04:45,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:04:45,882 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_610 (Array Int Int))) (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_array_list_init_dynamic_~#allocation_size~0#1.base| v_ArrVal_610) |c_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.base|) (+ |c_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset| 8)) 18446744073709551616) 0)) is different from false [2022-07-22 22:04:45,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:04:45,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999372349] [2022-07-22 22:04:45,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:04:45,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182766338] [2022-07-22 22:04:45,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182766338] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:04:45,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 22:04:45,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-07-22 22:04:45,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314899263] [2022-07-22 22:04:45,885 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 22:04:45,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 22:04:45,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:04:45,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 22:04:45,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=443, Unknown=2, NotChecked=86, Total=600 [2022-07-22 22:04:45,886 INFO L87 Difference]: Start difference. First operand 145 states and 178 transitions. Second operand has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 22 states have internal predecessors, (39), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-22 22:04:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:04:46,555 INFO L93 Difference]: Finished difference Result 277 states and 360 transitions. [2022-07-22 22:04:46,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 22:04:46,555 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 22 states have internal predecessors, (39), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 70 [2022-07-22 22:04:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:04:46,558 INFO L225 Difference]: With dead ends: 277 [2022-07-22 22:04:46,558 INFO L226 Difference]: Without dead ends: 218 [2022-07-22 22:04:46,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=714, Unknown=2, NotChecked=110, Total=930 [2022-07-22 22:04:46,559 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 97 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1265 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 22:04:46,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 985 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 708 Invalid, 0 Unknown, 1265 Unchecked, 0.5s Time] [2022-07-22 22:04:46,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-07-22 22:04:46,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 164. [2022-07-22 22:04:46,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 109 states have (on average 1.1743119266055047) internal successors, (128), 112 states have internal predecessors, (128), 36 states have call successors, (36), 17 states have call predecessors, (36), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2022-07-22 22:04:46,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 199 transitions. [2022-07-22 22:04:46,573 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 199 transitions. Word has length 70 [2022-07-22 22:04:46,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:04:46,573 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 199 transitions. [2022-07-22 22:04:46,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 22 states have internal predecessors, (39), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-22 22:04:46,574 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 199 transitions. [2022-07-22 22:04:46,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-22 22:04:46,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:04:46,575 INFO L195 NwaCegarLoop]: trace histogram [11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:04:46,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 22:04:46,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:04:46,776 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:04:46,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:04:46,776 INFO L85 PathProgramCache]: Analyzing trace with hash 150826135, now seen corresponding path program 4 times [2022-07-22 22:04:46,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:04:46,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422959543] [2022-07-22 22:04:46,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:04:46,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:04:46,853 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:04:46,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59986749] [2022-07-22 22:04:46,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 22:04:46,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:04:46,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:04:46,855 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) [2022-07-22 22:04:46,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 22:04:47,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 22:04:47,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:04:47,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 2215 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-22 22:04:47,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:04:47,297 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 [2022-07-22 22:04:47,624 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 14 treesize of output 10 [2022-07-22 22:04:47,661 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 22:04:47,662 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 23 treesize of output 22 [2022-07-22 22:04:47,705 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 22:04:47,705 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 23 treesize of output 22 [2022-07-22 22:04:47,797 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 22:04:47,797 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 [2022-07-22 22:04:47,860 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_852 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_852) |c_#memory_int|)) is different from true [2022-07-22 22:04:47,870 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 [2022-07-22 22:04:47,912 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 33 treesize of output 21 [2022-07-22 22:04:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 22:04:47,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:04:47,994 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_858 (Array Int Int))) (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_array_list_init_dynamic_~#allocation_size~0#1.base| v_ArrVal_858) |c_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.base|) (+ |c_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset| 8)) 18446744073709551616) 0)) is different from false [2022-07-22 22:04:47,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:04:47,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422959543] [2022-07-22 22:04:47,995 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:04:47,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59986749] [2022-07-22 22:04:47,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59986749] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:04:47,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 22:04:47,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-07-22 22:04:47,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321212014] [2022-07-22 22:04:47,996 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 22:04:47,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 22:04:47,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:04:47,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 22:04:47,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=485, Unknown=2, NotChecked=90, Total=650 [2022-07-22 22:04:47,997 INFO L87 Difference]: Start difference. First operand 164 states and 199 transitions. Second operand has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-22 22:04:48,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:04:48,686 INFO L93 Difference]: Finished difference Result 294 states and 384 transitions. [2022-07-22 22:04:48,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 22:04:48,687 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 71 [2022-07-22 22:04:48,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:04:48,689 INFO L225 Difference]: With dead ends: 294 [2022-07-22 22:04:48,689 INFO L226 Difference]: Without dead ends: 235 [2022-07-22 22:04:48,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=768, Unknown=2, NotChecked=114, Total=992 [2022-07-22 22:04:48,690 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 101 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 2327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1427 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 22:04:48,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 991 Invalid, 2327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 828 Invalid, 0 Unknown, 1427 Unchecked, 0.6s Time] [2022-07-22 22:04:48,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-07-22 22:04:48,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 165. [2022-07-22 22:04:48,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 110 states have (on average 1.1818181818181819) internal successors, (130), 113 states have internal predecessors, (130), 36 states have call successors, (36), 17 states have call predecessors, (36), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2022-07-22 22:04:48,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 201 transitions. [2022-07-22 22:04:48,702 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 201 transitions. Word has length 71 [2022-07-22 22:04:48,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:04:48,703 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 201 transitions. [2022-07-22 22:04:48,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-22 22:04:48,703 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 201 transitions. [2022-07-22 22:04:48,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-22 22:04:48,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:04:48,705 INFO L195 NwaCegarLoop]: trace histogram [12, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:04:48,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 22:04:48,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:04:48,924 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:04:48,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:04:48,924 INFO L85 PathProgramCache]: Analyzing trace with hash 575282207, now seen corresponding path program 5 times [2022-07-22 22:04:48,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:04:48,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425588560] [2022-07-22 22:04:48,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:04:48,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:04:49,019 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:04:49,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603131221] [2022-07-22 22:04:49,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 22:04:49,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:04:49,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:04:49,021 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) [2022-07-22 22:04:49,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 22:04:57,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-22 22:04:57,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:04:57,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 2234 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-22 22:04:57,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:04:57,458 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 [2022-07-22 22:04:57,743 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 [2022-07-22 22:04:57,782 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 22:04:57,783 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 23 treesize of output 22 [2022-07-22 22:04:57,824 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 22:04:57,824 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 23 treesize of output 22 [2022-07-22 22:04:57,868 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 22:04:57,869 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 23 treesize of output 22 [2022-07-22 22:04:57,951 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 22:04:57,951 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 [2022-07-22 22:04:58,014 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1118 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_1118) |c_#memory_int|)) is different from true [2022-07-22 22:04:58,026 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 [2022-07-22 22:04:58,061 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 33 treesize of output 21 [2022-07-22 22:04:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 3 proven. 75 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 22:04:58,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:04:58,139 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1124 (Array Int Int))) (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_array_list_init_dynamic_~#allocation_size~0#1.base| v_ArrVal_1124) |c_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.base|) (+ |c_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset| 8)) 18446744073709551616) 0)) is different from false [2022-07-22 22:04:58,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:04:58,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425588560] [2022-07-22 22:04:58,140 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:04:58,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603131221] [2022-07-22 22:04:58,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603131221] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:04:58,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 22:04:58,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-07-22 22:04:58,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280879957] [2022-07-22 22:04:58,141 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 22:04:58,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 22:04:58,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:04:58,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 22:04:58,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=526, Unknown=2, NotChecked=94, Total=702 [2022-07-22 22:04:58,142 INFO L87 Difference]: Start difference. First operand 165 states and 201 transitions. Second operand has 25 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 24 states have internal predecessors, (41), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-22 22:04:58,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:04:58,681 INFO L93 Difference]: Finished difference Result 279 states and 361 transitions. [2022-07-22 22:04:58,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 22:04:58,682 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 24 states have internal predecessors, (41), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 72 [2022-07-22 22:04:58,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:04:58,683 INFO L225 Difference]: With dead ends: 279 [2022-07-22 22:04:58,683 INFO L226 Difference]: Without dead ends: 220 [2022-07-22 22:04:58,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=766, Unknown=2, NotChecked=114, Total=992 [2022-07-22 22:04:58,684 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 105 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 687 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 22:04:58,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 551 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 655 Invalid, 0 Unknown, 687 Unchecked, 0.4s Time] [2022-07-22 22:04:58,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-22 22:04:58,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 154. [2022-07-22 22:04:58,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 104 states have internal predecessors, (117), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-22 22:04:58,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2022-07-22 22:04:58,695 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 72 [2022-07-22 22:04:58,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:04:58,695 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2022-07-22 22:04:58,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 24 states have internal predecessors, (41), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-22 22:04:58,695 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2022-07-22 22:04:58,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-22 22:04:58,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:04:58,696 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:04:58,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 22:04:58,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-22 22:04:58,910 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:04:58,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:04:58,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1655426551, now seen corresponding path program 1 times [2022-07-22 22:04:58,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:04:58,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551718592] [2022-07-22 22:04:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:04:58,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:04:58,993 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:04:58,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1294346375] [2022-07-22 22:04:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:04:58,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:04:58,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:04:58,996 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) [2022-07-22 22:04:59,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 22:04:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:04:59,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 2179 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 22:04:59,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:04:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-22 22:04:59,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:04:59,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:04:59,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551718592] [2022-07-22 22:04:59,427 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:04:59,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294346375] [2022-07-22 22:04:59,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294346375] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:04:59,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:04:59,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 22:04:59,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163698434] [2022-07-22 22:04:59,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:04:59,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 22:04:59,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:04:59,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 22:04:59,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 22:04:59,432 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-22 22:04:59,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:04:59,464 INFO L93 Difference]: Finished difference Result 216 states and 262 transitions. [2022-07-22 22:04:59,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 22:04:59,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 73 [2022-07-22 22:04:59,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:04:59,467 INFO L225 Difference]: With dead ends: 216 [2022-07-22 22:04:59,467 INFO L226 Difference]: Without dead ends: 159 [2022-07-22 22:04:59,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 22:04:59,470 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 2 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 22:04:59,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 633 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 22:04:59,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-22 22:04:59,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-07-22 22:04:59,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 108 states have internal predecessors, (121), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 33 states have call predecessors, (35), 33 states have call successors, (35) [2022-07-22 22:04:59,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 191 transitions. [2022-07-22 22:04:59,480 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 191 transitions. Word has length 73 [2022-07-22 22:04:59,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:04:59,480 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 191 transitions. [2022-07-22 22:04:59,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-22 22:04:59,480 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 191 transitions. [2022-07-22 22:04:59,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 22:04:59,482 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:04:59,482 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:04:59,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 22:04:59,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:04:59,695 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:04:59,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:04:59,696 INFO L85 PathProgramCache]: Analyzing trace with hash -209615541, now seen corresponding path program 1 times [2022-07-22 22:04:59,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:04:59,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100445877] [2022-07-22 22:04:59,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:04:59,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:04:59,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:04:59,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 22:04:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:04:59,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 22:04:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:04:59,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:04:59,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:04:59,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 22:04:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:04:59,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 22:04:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:04:59,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-22 22:04:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:04:59,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 22:04:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:00,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 22:05:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:00,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:05:00,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:00,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-22 22:05:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:00,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 22:05:00,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-22 22:05:00,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:05:00,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100445877] [2022-07-22 22:05:00,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100445877] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:05:00,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:05:00,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 22:05:00,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783259109] [2022-07-22 22:05:00,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:05:00,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 22:05:00,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:05:00,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 22:05:00,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-22 22:05:00,095 INFO L87 Difference]: Start difference. First operand 159 states and 191 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-22 22:05:00,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:05:00,614 INFO L93 Difference]: Finished difference Result 196 states and 236 transitions. [2022-07-22 22:05:00,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 22:05:00,614 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (12), 6 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 79 [2022-07-22 22:05:00,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:05:00,615 INFO L225 Difference]: With dead ends: 196 [2022-07-22 22:05:00,615 INFO L226 Difference]: Without dead ends: 194 [2022-07-22 22:05:00,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-07-22 22:05:00,616 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 243 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 22:05:00,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 577 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 22:05:00,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-22 22:05:00,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 166. [2022-07-22 22:05:00,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 109 states have (on average 1.146788990825688) internal successors, (125), 113 states have internal predecessors, (125), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (38), 34 states have call predecessors, (38), 34 states have call successors, (38) [2022-07-22 22:05:00,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 199 transitions. [2022-07-22 22:05:00,630 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 199 transitions. Word has length 79 [2022-07-22 22:05:00,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:05:00,630 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 199 transitions. [2022-07-22 22:05:00,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-22 22:05:00,631 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 199 transitions. [2022-07-22 22:05:00,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 22:05:00,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:05:00,632 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:05:00,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 22:05:00,632 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:05:00,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:05:00,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1358446658, now seen corresponding path program 1 times [2022-07-22 22:05:00,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:05:00,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314793926] [2022-07-22 22:05:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:05:00,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:05:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:00,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 22:05:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:00,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 22:05:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:00,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:05:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:00,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 22:05:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:00,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 22:05:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:00,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-22 22:05:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:00,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 22:05:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:01,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 22:05:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:01,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:05:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:01,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-22 22:05:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:01,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 22:05:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 22:05:01,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:05:01,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314793926] [2022-07-22 22:05:01,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314793926] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:05:01,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555397461] [2022-07-22 22:05:01,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:05:01,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:05:01,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:05:01,232 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) [2022-07-22 22:05:01,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 22:05:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:01,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 2186 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-22 22:05:01,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:05:01,951 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 14 treesize of output 10 [2022-07-22 22:05:01,996 INFO L356 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-07-22 22:05:01,996 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 25 treesize of output 24 [2022-07-22 22:05:02,056 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-22 22:05:02,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-22 22:05:02,133 INFO L356 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2022-07-22 22:05:02,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2022-07-22 22:05:02,223 INFO L356 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2022-07-22 22:05:02,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2022-07-22 22:05:02,317 INFO L356 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2022-07-22 22:05:02,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2022-07-22 22:05:02,418 INFO L356 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2022-07-22 22:05:02,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2022-07-22 22:05:02,525 INFO L356 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2022-07-22 22:05:02,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2022-07-22 22:05:02,710 INFO L356 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2022-07-22 22:05:02,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2022-07-22 22:05:02,865 INFO L356 Elim1Store]: treesize reduction 384, result has 13.7 percent of original size [2022-07-22 22:05:02,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 74 treesize of output 88 [2022-07-22 22:05:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-22 22:05:09,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:05:10,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555397461] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:05:10,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:05:10,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24] total 39 [2022-07-22 22:05:10,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517315995] [2022-07-22 22:05:10,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:05:10,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 22:05:10,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:05:10,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 22:05:10,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1777, Unknown=3, NotChecked=0, Total=1892 [2022-07-22 22:05:10,552 INFO L87 Difference]: Start difference. First operand 166 states and 199 transitions. Second operand has 39 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 34 states have internal predecessors, (80), 6 states have call successors, (23), 8 states have call predecessors, (23), 6 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-07-22 22:05:14,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:05:14,102 INFO L93 Difference]: Finished difference Result 333 states and 403 transitions. [2022-07-22 22:05:14,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 22:05:14,103 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 34 states have internal predecessors, (80), 6 states have call successors, (23), 8 states have call predecessors, (23), 6 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 79 [2022-07-22 22:05:14,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:05:14,104 INFO L225 Difference]: With dead ends: 333 [2022-07-22 22:05:14,104 INFO L226 Difference]: Without dead ends: 197 [2022-07-22 22:05:14,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=338, Invalid=4081, Unknown=3, NotChecked=0, Total=4422 [2022-07-22 22:05:14,106 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 354 mSDsluCounter, 1680 mSDsCounter, 0 mSdLazyCounter, 3174 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 1799 SdHoareTripleChecker+Invalid, 4239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 3174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 750 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 22:05:14,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 1799 Invalid, 4239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 3174 Invalid, 0 Unknown, 750 Unchecked, 2.4s Time] [2022-07-22 22:05:14,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-22 22:05:14,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 167. [2022-07-22 22:05:14,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 110 states have (on average 1.1454545454545455) internal successors, (126), 114 states have internal predecessors, (126), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (38), 34 states have call predecessors, (38), 34 states have call successors, (38) [2022-07-22 22:05:14,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 200 transitions. [2022-07-22 22:05:14,121 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 200 transitions. Word has length 79 [2022-07-22 22:05:14,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:05:14,121 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 200 transitions. [2022-07-22 22:05:14,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 34 states have internal predecessors, (80), 6 states have call successors, (23), 8 states have call predecessors, (23), 6 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-07-22 22:05:14,122 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 200 transitions. [2022-07-22 22:05:14,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-22 22:05:14,122 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:05:14,123 INFO L195 NwaCegarLoop]: trace histogram [11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:05:14,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 22:05:14,335 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,SelfDestructingSolverStorable10 [2022-07-22 22:05:14,335 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:05:14,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:05:14,336 INFO L85 PathProgramCache]: Analyzing trace with hash -360650806, now seen corresponding path program 2 times [2022-07-22 22:05:14,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:05:14,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730530320] [2022-07-22 22:05:14,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:05:14,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:05:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:14,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 22:05:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:14,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 22:05:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:14,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:05:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:14,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 22:05:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:14,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 22:05:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:14,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-22 22:05:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:14,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 22:05:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:14,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-22 22:05:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:14,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:05:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:15,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-22 22:05:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:15,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 22:05:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 22:05:15,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:05:15,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730530320] [2022-07-22 22:05:15,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730530320] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:05:15,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151658322] [2022-07-22 22:05:15,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 22:05:15,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:05:15,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:05:15,040 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) [2022-07-22 22:05:15,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 22:05:15,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 22:05:15,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:05:15,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 2205 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-22 22:05:15,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:05:15,891 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 14 treesize of output 10 [2022-07-22 22:05:15,938 INFO L356 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-07-22 22:05:15,938 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 25 treesize of output 24 [2022-07-22 22:05:15,997 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-22 22:05:15,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-22 22:05:16,064 INFO L356 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2022-07-22 22:05:16,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2022-07-22 22:05:16,165 INFO L356 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2022-07-22 22:05:16,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2022-07-22 22:05:16,290 INFO L356 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2022-07-22 22:05:16,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2022-07-22 22:05:16,431 INFO L356 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2022-07-22 22:05:16,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2022-07-22 22:05:16,620 INFO L356 Elim1Store]: treesize reduction 511, result has 12.2 percent of original size [2022-07-22 22:05:16,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 102 [2022-07-22 22:05:16,820 INFO L356 Elim1Store]: treesize reduction 640, result has 11.2 percent of original size [2022-07-22 22:05:16,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 115 [2022-07-22 22:05:17,081 INFO L356 Elim1Store]: treesize reduction 783, result has 10.4 percent of original size [2022-07-22 22:05:17,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 105 treesize of output 128 [2022-07-22 22:05:17,398 INFO L356 Elim1Store]: treesize reduction 920, result has 9.9 percent of original size [2022-07-22 22:05:17,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 114 treesize of output 140 [2022-07-22 22:05:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 22:05:20,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:05:21,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151658322] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:05:21,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:05:21,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 36 [2022-07-22 22:05:21,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161199731] [2022-07-22 22:05:21,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:05:21,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-22 22:05:21,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:05:21,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-22 22:05:21,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1531, Unknown=1, NotChecked=0, Total=1640 [2022-07-22 22:05:21,463 INFO L87 Difference]: Start difference. First operand 167 states and 200 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 31 states have internal predecessors, (75), 4 states have call successors, (17), 8 states have call predecessors, (17), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-22 22:05:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:05:25,006 INFO L93 Difference]: Finished difference Result 332 states and 402 transitions. [2022-07-22 22:05:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 22:05:25,006 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 31 states have internal predecessors, (75), 4 states have call successors, (17), 8 states have call predecessors, (17), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 80 [2022-07-22 22:05:25,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:05:25,007 INFO L225 Difference]: With dead ends: 332 [2022-07-22 22:05:25,007 INFO L226 Difference]: Without dead ends: 196 [2022-07-22 22:05:25,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=230, Invalid=2961, Unknown=1, NotChecked=0, Total=3192 [2022-07-22 22:05:25,009 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 146 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 2708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 549 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 22:05:25,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 1657 Invalid, 2708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2029 Invalid, 0 Unknown, 549 Unchecked, 2.4s Time] [2022-07-22 22:05:25,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-07-22 22:05:25,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 168. [2022-07-22 22:05:25,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 115 states have internal predecessors, (127), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (38), 34 states have call predecessors, (38), 34 states have call successors, (38) [2022-07-22 22:05:25,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 201 transitions. [2022-07-22 22:05:25,023 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 201 transitions. Word has length 80 [2022-07-22 22:05:25,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:05:25,024 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 201 transitions. [2022-07-22 22:05:25,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 31 states have internal predecessors, (75), 4 states have call successors, (17), 8 states have call predecessors, (17), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-22 22:05:25,024 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 201 transitions. [2022-07-22 22:05:25,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-22 22:05:25,025 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:05:25,025 INFO L195 NwaCegarLoop]: trace histogram [12, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:05:25,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 22:05:25,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 22:05:25,247 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:05:25,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:05:25,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2113064638, now seen corresponding path program 3 times [2022-07-22 22:05:25,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:05:25,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199689574] [2022-07-22 22:05:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:05:25,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:05:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:25,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 22:05:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:25,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 22:05:25,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:25,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:05:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:25,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 22:05:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:25,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 22:05:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:25,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-22 22:05:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:25,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 22:05:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:25,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-22 22:05:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:25,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:05:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:25,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-22 22:05:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:25,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 22:05:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 22:05:25,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:05:25,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199689574] [2022-07-22 22:05:25,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199689574] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:05:25,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565617928] [2022-07-22 22:05:25,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 22:05:25,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:05:25,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:05:25,938 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) [2022-07-22 22:05:25,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 22:05:31,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-22 22:05:31,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:05:31,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 2224 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-22 22:05:31,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:05:31,416 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 [2022-07-22 22:05:31,479 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 22:05:31,480 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 23 treesize of output 22 [2022-07-22 22:05:31,547 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 22:05:31,548 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 23 treesize of output 22 [2022-07-22 22:05:31,625 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 22:05:31,625 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 23 treesize of output 22 [2022-07-22 22:05:31,694 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 22:05:31,694 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 23 treesize of output 22 [2022-07-22 22:05:31,769 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 22:05:31,769 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 23 treesize of output 22 [2022-07-22 22:05:31,850 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 22:05:31,851 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 23 treesize of output 22 [2022-07-22 22:05:31,929 INFO L356 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2022-07-22 22:05:31,929 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 24 treesize of output 23 [2022-07-22 22:05:32,002 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 22:05:32,003 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 23 treesize of output 22 [2022-07-22 22:05:32,109 INFO L356 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2022-07-22 22:05:32,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2022-07-22 22:05:32,271 INFO L356 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2022-07-22 22:05:32,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2022-07-22 22:05:32,424 INFO L356 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2022-07-22 22:05:32,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2022-07-22 22:05:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-22 22:05:33,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:05:33,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565617928] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:05:33,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:05:33,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2022-07-22 22:05:33,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049827412] [2022-07-22 22:05:33,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:05:33,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-22 22:05:33,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:05:33,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-22 22:05:33,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1581, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 22:05:33,573 INFO L87 Difference]: Start difference. First operand 168 states and 201 transitions. Second operand has 37 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 32 states have internal predecessors, (78), 6 states have call successors, (23), 8 states have call predecessors, (23), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-07-22 22:05:34,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:05:34,928 INFO L93 Difference]: Finished difference Result 356 states and 432 transitions. [2022-07-22 22:05:34,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-22 22:05:34,928 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 32 states have internal predecessors, (78), 6 states have call successors, (23), 8 states have call predecessors, (23), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 81 [2022-07-22 22:05:34,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:05:34,930 INFO L225 Difference]: With dead ends: 356 [2022-07-22 22:05:34,930 INFO L226 Difference]: Without dead ends: 218 [2022-07-22 22:05:34,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=313, Invalid=3227, Unknown=0, NotChecked=0, Total=3540 [2022-07-22 22:05:34,932 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 262 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 596 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 22:05:34,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 1373 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 760 Invalid, 0 Unknown, 596 Unchecked, 0.5s Time] [2022-07-22 22:05:34,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-07-22 22:05:34,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 186. [2022-07-22 22:05:34,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 128 states have internal predecessors, (144), 39 states have call successors, (39), 21 states have call predecessors, (39), 22 states have return successors, (42), 36 states have call predecessors, (42), 37 states have call successors, (42) [2022-07-22 22:05:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 225 transitions. [2022-07-22 22:05:34,947 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 225 transitions. Word has length 81 [2022-07-22 22:05:34,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:05:34,947 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 225 transitions. [2022-07-22 22:05:34,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 32 states have internal predecessors, (78), 6 states have call successors, (23), 8 states have call predecessors, (23), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-07-22 22:05:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 225 transitions. [2022-07-22 22:05:34,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-22 22:05:34,949 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:05:34,949 INFO L195 NwaCegarLoop]: trace histogram [13, 5, 5, 5, 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] [2022-07-22 22:05:34,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 22:05:35,162 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,SelfDestructingSolverStorable12 [2022-07-22 22:05:35,162 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:05:35,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:05:35,163 INFO L85 PathProgramCache]: Analyzing trace with hash -780390283, now seen corresponding path program 1 times [2022-07-22 22:05:35,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:05:35,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451036022] [2022-07-22 22:05:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:05:35,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:05:35,218 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:05:35,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970079856] [2022-07-22 22:05:35,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:05:35,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:05:35,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:05:35,220 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) [2022-07-22 22:05:35,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 22:05:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:35,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 2291 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 22:05:35,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:05:35,709 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-22 22:05:35,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:05:35,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:05:35,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451036022] [2022-07-22 22:05:35,709 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:05:35,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970079856] [2022-07-22 22:05:35,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970079856] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:05:35,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:05:35,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 22:05:35,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317136515] [2022-07-22 22:05:35,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:05:35,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 22:05:35,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:05:35,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 22:05:35,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 22:05:35,711 INFO L87 Difference]: Start difference. First operand 186 states and 225 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-22 22:05:35,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:05:35,887 INFO L93 Difference]: Finished difference Result 246 states and 298 transitions. [2022-07-22 22:05:35,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 22:05:35,887 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 84 [2022-07-22 22:05:35,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:05:35,888 INFO L225 Difference]: With dead ends: 246 [2022-07-22 22:05:35,888 INFO L226 Difference]: Without dead ends: 186 [2022-07-22 22:05:35,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-07-22 22:05:35,889 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 192 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:05:35,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 547 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:05:35,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-22 22:05:35,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2022-07-22 22:05:35,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 124 states have (on average 1.153225806451613) internal successors, (143), 128 states have internal predecessors, (143), 39 states have call successors, (39), 21 states have call predecessors, (39), 22 states have return successors, (42), 36 states have call predecessors, (42), 37 states have call successors, (42) [2022-07-22 22:05:35,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 224 transitions. [2022-07-22 22:05:35,903 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 224 transitions. Word has length 84 [2022-07-22 22:05:35,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:05:35,904 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 224 transitions. [2022-07-22 22:05:35,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-22 22:05:35,904 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 224 transitions. [2022-07-22 22:05:35,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-22 22:05:35,906 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:05:35,906 INFO L195 NwaCegarLoop]: trace histogram [13, 5, 5, 5, 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] [2022-07-22 22:05:35,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 22:05:36,127 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,SelfDestructingSolverStorable13 [2022-07-22 22:05:36,127 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:05:36,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:05:36,128 INFO L85 PathProgramCache]: Analyzing trace with hash -699058586, now seen corresponding path program 1 times [2022-07-22 22:05:36,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:05:36,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805687440] [2022-07-22 22:05:36,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:05:36,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:05:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:36,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 22:05:36,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:36,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 22:05:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:36,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:05:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:36,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 22:05:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:36,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 22:05:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:36,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-22 22:05:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:36,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 22:05:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:36,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 22:05:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:36,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:05:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:36,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-22 22:05:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:36,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-22 22:05:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-22 22:05:36,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:05:36,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805687440] [2022-07-22 22:05:36,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805687440] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:05:36,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520775182] [2022-07-22 22:05:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:05:36,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:05:36,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:05:36,932 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) [2022-07-22 22:05:36,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 22:05:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:37,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 2250 conjuncts, 108 conjunts are in the unsatisfiable core [2022-07-22 22:05:37,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:05:37,614 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 14 treesize of output 10 [2022-07-22 22:05:37,662 INFO L356 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-07-22 22:05:37,662 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 25 treesize of output 24 [2022-07-22 22:05:37,742 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-22 22:05:37,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-22 22:05:37,819 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-22 22:05:37,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-22 22:05:37,910 INFO L356 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2022-07-22 22:05:37,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2022-07-22 22:05:38,004 INFO L356 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2022-07-22 22:05:38,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2022-07-22 22:05:38,129 INFO L356 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2022-07-22 22:05:38,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2022-07-22 22:05:38,284 INFO L356 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2022-07-22 22:05:38,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2022-07-22 22:05:38,506 INFO L356 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2022-07-22 22:05:38,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2022-07-22 22:05:38,792 INFO L356 Elim1Store]: treesize reduction 511, result has 12.2 percent of original size [2022-07-22 22:05:38,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 102 [2022-07-22 22:05:39,112 INFO L356 Elim1Store]: treesize reduction 640, result has 11.2 percent of original size [2022-07-22 22:05:39,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 115 [2022-07-22 22:05:39,458 INFO L356 Elim1Store]: treesize reduction 783, result has 10.4 percent of original size [2022-07-22 22:05:39,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 105 treesize of output 128 [2022-07-22 22:05:39,879 INFO L356 Elim1Store]: treesize reduction 920, result has 9.9 percent of original size [2022-07-22 22:05:39,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 114 treesize of output 140 [2022-07-22 22:05:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 22:05:41,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:05:42,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520775182] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:05:42,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:05:42,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 43 [2022-07-22 22:05:42,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003132879] [2022-07-22 22:05:42,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:05:42,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-22 22:05:42,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:05:42,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-22 22:05:42,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2220, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 22:05:42,306 INFO L87 Difference]: Start difference. First operand 186 states and 224 transitions. Second operand has 43 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 38 states have internal predecessors, (87), 6 states have call successors, (23), 8 states have call predecessors, (23), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-07-22 22:05:47,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:05:47,398 INFO L93 Difference]: Finished difference Result 369 states and 448 transitions. [2022-07-22 22:05:47,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 22:05:47,398 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 38 states have internal predecessors, (87), 6 states have call successors, (23), 8 states have call predecessors, (23), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 85 [2022-07-22 22:05:47,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:05:47,399 INFO L225 Difference]: With dead ends: 369 [2022-07-22 22:05:47,399 INFO L226 Difference]: Without dead ends: 216 [2022-07-22 22:05:47,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=274, Invalid=4282, Unknown=0, NotChecked=0, Total=4556 [2022-07-22 22:05:47,401 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 259 mSDsluCounter, 1334 mSDsCounter, 0 mSdLazyCounter, 2461 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1478 SdHoareTripleChecker+Invalid, 3302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 2461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 612 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-22 22:05:47,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 1478 Invalid, 3302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 2461 Invalid, 0 Unknown, 612 Unchecked, 3.4s Time] [2022-07-22 22:05:47,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-22 22:05:47,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 187. [2022-07-22 22:05:47,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 125 states have (on average 1.152) internal successors, (144), 129 states have internal predecessors, (144), 39 states have call successors, (39), 21 states have call predecessors, (39), 22 states have return successors, (42), 36 states have call predecessors, (42), 37 states have call successors, (42) [2022-07-22 22:05:47,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 225 transitions. [2022-07-22 22:05:47,420 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 225 transitions. Word has length 85 [2022-07-22 22:05:47,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:05:47,420 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 225 transitions. [2022-07-22 22:05:47,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 38 states have internal predecessors, (87), 6 states have call successors, (23), 8 states have call predecessors, (23), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-07-22 22:05:47,421 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 225 transitions. [2022-07-22 22:05:47,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-22 22:05:47,421 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:05:47,422 INFO L195 NwaCegarLoop]: trace histogram [14, 5, 5, 5, 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] [2022-07-22 22:05:47,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 22:05:47,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:05:47,635 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:05:47,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:05:47,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1960056814, now seen corresponding path program 2 times [2022-07-22 22:05:47,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:05:47,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875490850] [2022-07-22 22:05:47,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:05:47,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:05:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:47,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 22:05:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:47,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 22:05:47,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:47,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:05:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:47,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 22:05:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:47,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 22:05:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:47,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-22 22:05:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:47,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 22:05:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:48,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 22:05:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:48,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:05:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:48,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-22 22:05:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:48,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-22 22:05:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:05:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-22 22:05:48,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:05:48,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875490850] [2022-07-22 22:05:48,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875490850] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:05:48,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697571530] [2022-07-22 22:05:48,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 22:05:48,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:05:48,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:05:48,485 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) [2022-07-22 22:05:48,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 22:05:49,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 22:05:49,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:05:49,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 2269 conjuncts, 213 conjunts are in the unsatisfiable core [2022-07-22 22:05:49,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:05:49,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:05:49,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:05:49,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:05:49,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2022-07-22 22:05:49,426 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 22:05:49,427 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 19 treesize of output 7 [2022-07-22 22:05:49,890 INFO L356 Elim1Store]: treesize reduction 152, result has 50.2 percent of original size [2022-07-22 22:05:49,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 39 select indices, 39 select index equivalence classes, 703 disjoint index pairs (out of 741 index pairs), introduced 39 new quantified variables, introduced 38 case distinctions, treesize of input 196 treesize of output 270 [2022-07-22 22:05:51,700 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 14 treesize of output 10 [2022-07-22 22:05:51,779 INFO L356 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-07-22 22:05:51,780 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 25 treesize of output 24 [2022-07-22 22:05:51,898 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-22 22:05:51,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-22 22:05:52,021 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-22 22:05:52,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-22 22:05:52,137 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-22 22:05:52,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-22 22:05:52,254 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-22 22:05:52,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-22 22:05:52,358 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-22 22:05:52,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-22 22:05:52,490 INFO L356 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2022-07-22 22:05:52,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2022-07-22 22:05:52,643 INFO L356 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2022-07-22 22:05:52,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2022-07-22 22:05:52,772 INFO L356 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2022-07-22 22:05:52,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2022-07-22 22:05:52,899 INFO L356 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2022-07-22 22:05:52,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2022-07-22 22:05:53,054 INFO L356 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2022-07-22 22:05:53,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2022-07-22 22:05:53,245 INFO L356 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2022-07-22 22:05:53,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2022-07-22 22:05:53,405 INFO L356 Elim1Store]: treesize reduction 200, result has 17.0 percent of original size [2022-07-22 22:05:53,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 62 [2022-07-22 22:05:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 12 proven. 113 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-22 22:05:59,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:06:00,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697571530] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:06:00,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:06:00,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 31] total 50 [2022-07-22 22:06:00,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076497960] [2022-07-22 22:06:00,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:06:00,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-22 22:06:00,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:06:00,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-22 22:06:00,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2928, Unknown=1, NotChecked=0, Total=3080 [2022-07-22 22:06:00,257 INFO L87 Difference]: Start difference. First operand 187 states and 225 transitions. Second operand has 50 states, 48 states have (on average 1.9375) internal successors, (93), 43 states have internal predecessors, (93), 7 states have call successors, (23), 8 states have call predecessors, (23), 6 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2022-07-22 22:06:11,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:06:11,647 INFO L93 Difference]: Finished difference Result 421 states and 506 transitions. [2022-07-22 22:06:11,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-22 22:06:11,648 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 1.9375) internal successors, (93), 43 states have internal predecessors, (93), 7 states have call successors, (23), 8 states have call predecessors, (23), 6 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 86 [2022-07-22 22:06:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:06:11,650 INFO L225 Difference]: With dead ends: 421 [2022-07-22 22:06:11,650 INFO L226 Difference]: Without dead ends: 268 [2022-07-22 22:06:11,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=465, Invalid=7016, Unknown=1, NotChecked=0, Total=7482 [2022-07-22 22:06:11,653 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 358 mSDsluCounter, 2688 mSDsCounter, 0 mSdLazyCounter, 4919 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 2830 SdHoareTripleChecker+Invalid, 6194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 4919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 969 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-07-22 22:06:11,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 2830 Invalid, 6194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 4919 Invalid, 0 Unknown, 969 Unchecked, 4.7s Time] [2022-07-22 22:06:11,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-07-22 22:06:11,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 216. [2022-07-22 22:06:11,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 146 states have (on average 1.1575342465753424) internal successors, (169), 151 states have internal predecessors, (169), 42 states have call successors, (42), 26 states have call predecessors, (42), 27 states have return successors, (44), 38 states have call predecessors, (44), 40 states have call successors, (44) [2022-07-22 22:06:11,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 255 transitions. [2022-07-22 22:06:11,701 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 255 transitions. Word has length 86 [2022-07-22 22:06:11,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:06:11,702 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 255 transitions. [2022-07-22 22:06:11,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 1.9375) internal successors, (93), 43 states have internal predecessors, (93), 7 states have call successors, (23), 8 states have call predecessors, (23), 6 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2022-07-22 22:06:11,702 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 255 transitions. [2022-07-22 22:06:11,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-22 22:06:11,703 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:06:11,703 INFO L195 NwaCegarLoop]: trace histogram [15, 5, 5, 5, 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] [2022-07-22 22:06:11,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 22:06:11,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 22:06:11,922 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:06:11,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:06:11,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1506711706, now seen corresponding path program 3 times [2022-07-22 22:06:11,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:06:11,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102025398] [2022-07-22 22:06:11,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:06:11,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:06:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:06:12,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 22:06:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:06:12,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 22:06:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:06:12,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:06:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:06:12,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 22:06:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:06:12,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 22:06:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:06:12,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-22 22:06:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:06:12,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 22:06:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:06:12,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-22 22:06:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:06:12,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:06:12,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:06:12,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-22 22:06:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:06:12,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-22 22:06:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:06:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-22 22:06:12,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:06:12,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102025398] [2022-07-22 22:06:12,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102025398] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:06:12,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142365882] [2022-07-22 22:06:12,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 22:06:12,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:06:12,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:06:12,906 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) [2022-07-22 22:06:12,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 22:07:25,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-22 22:07:25,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:07:25,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 2288 conjuncts, 145 conjunts are in the unsatisfiable core [2022-07-22 22:07:25,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:07:25,462 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 14 treesize of output 10 [2022-07-22 22:07:25,525 INFO L356 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-07-22 22:07:25,525 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 25 treesize of output 24 [2022-07-22 22:07:25,631 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-22 22:07:25,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-22 22:07:25,754 INFO L356 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2022-07-22 22:07:25,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2022-07-22 22:07:25,935 INFO L356 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2022-07-22 22:07:25,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2022-07-22 22:07:26,100 INFO L356 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2022-07-22 22:07:26,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2022-07-22 22:07:26,382 INFO L356 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2022-07-22 22:07:26,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2022-07-22 22:07:26,820 INFO L356 Elim1Store]: treesize reduction 511, result has 12.2 percent of original size [2022-07-22 22:07:26,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 102 [2022-07-22 22:07:27,485 INFO L356 Elim1Store]: treesize reduction 640, result has 11.2 percent of original size [2022-07-22 22:07:27,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 115 [2022-07-22 22:07:28,322 INFO L356 Elim1Store]: treesize reduction 783, result has 10.4 percent of original size [2022-07-22 22:07:28,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 105 treesize of output 128 [2022-07-22 22:07:29,166 INFO L356 Elim1Store]: treesize reduction 940, result has 9.7 percent of original size [2022-07-22 22:07:29,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 115 treesize of output 141 [2022-07-22 22:07:30,423 INFO L356 Elim1Store]: treesize reduction 1111, result has 9.1 percent of original size [2022-07-22 22:07:30,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 125 treesize of output 154 [2022-07-22 22:07:31,425 INFO L356 Elim1Store]: treesize reduction 1296, result has 8.5 percent of original size [2022-07-22 22:07:31,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 135 treesize of output 167 [2022-07-22 22:07:32,638 INFO L356 Elim1Store]: treesize reduction 1495, result has 8.1 percent of original size [2022-07-22 22:07:32,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 145 treesize of output 180 [2022-07-22 22:07:33,720 INFO L356 Elim1Store]: treesize reduction 2464, result has 6.9 percent of original size [2022-07-22 22:07:33,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 200 treesize of output 238 [2022-07-22 22:07:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 22:07:37,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:07:38,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142365882] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:07:38,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:07:38,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28] total 48 [2022-07-22 22:07:38,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742306668] [2022-07-22 22:07:38,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:07:38,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-22 22:07:38,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:07:38,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-22 22:07:38,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2789, Unknown=0, NotChecked=0, Total=2970 [2022-07-22 22:07:38,582 INFO L87 Difference]: Start difference. First operand 216 states and 255 transitions. Second operand has 48 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 43 states have internal predecessors, (91), 6 states have call successors, (23), 8 states have call predecessors, (23), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-07-22 22:07:48,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:07:48,179 INFO L93 Difference]: Finished difference Result 430 states and 511 transitions. [2022-07-22 22:07:48,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 22:07:48,180 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 43 states have internal predecessors, (91), 6 states have call successors, (23), 8 states have call predecessors, (23), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 87 [2022-07-22 22:07:48,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:07:48,181 INFO L225 Difference]: With dead ends: 430 [2022-07-22 22:07:48,181 INFO L226 Difference]: Without dead ends: 249 [2022-07-22 22:07:48,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=339, Invalid=5361, Unknown=0, NotChecked=0, Total=5700 [2022-07-22 22:07:48,184 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 337 mSDsluCounter, 1962 mSDsCounter, 0 mSdLazyCounter, 3109 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 2106 SdHoareTripleChecker+Invalid, 3974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 3109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 548 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-07-22 22:07:48,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 2106 Invalid, 3974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 3109 Invalid, 0 Unknown, 548 Unchecked, 5.9s Time] [2022-07-22 22:07:48,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-07-22 22:07:48,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 217. [2022-07-22 22:07:48,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 147 states have (on average 1.1564625850340136) internal successors, (170), 152 states have internal predecessors, (170), 42 states have call successors, (42), 26 states have call predecessors, (42), 27 states have return successors, (44), 38 states have call predecessors, (44), 40 states have call successors, (44) [2022-07-22 22:07:48,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 256 transitions. [2022-07-22 22:07:48,216 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 256 transitions. Word has length 87 [2022-07-22 22:07:48,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:07:48,216 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 256 transitions. [2022-07-22 22:07:48,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 43 states have internal predecessors, (91), 6 states have call successors, (23), 8 states have call predecessors, (23), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-07-22 22:07:48,217 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 256 transitions. [2022-07-22 22:07:48,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-22 22:07:48,217 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:07:48,218 INFO L195 NwaCegarLoop]: trace histogram [16, 5, 5, 5, 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] [2022-07-22 22:07:48,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 22:07:48,423 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,SelfDestructingSolverStorable16 [2022-07-22 22:07:48,423 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:07:48,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:07:48,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1602353426, now seen corresponding path program 4 times [2022-07-22 22:07:48,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:07:48,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566455466] [2022-07-22 22:07:48,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:07:48,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:07:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:07:48,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 22:07:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:07:48,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 22:07:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:07:48,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:07:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:07:48,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 22:07:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:07:48,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 22:07:48,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:07:48,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-22 22:07:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:07:48,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 22:07:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:07:49,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-22 22:07:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:07:49,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:07:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:07:49,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-22 22:07:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:07:49,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 22:07:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:07:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-22 22:07:49,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:07:49,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566455466] [2022-07-22 22:07:49,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566455466] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:07:49,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728648125] [2022-07-22 22:07:49,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 22:07:49,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:07:49,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:07:49,582 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) [2022-07-22 22:07:49,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 22:07:50,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 22:07:50,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:07:50,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 2307 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-22 22:07:50,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:07:50,262 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 14 treesize of output 10 [2022-07-22 22:07:50,329 INFO L356 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-07-22 22:07:50,330 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 25 treesize of output 24 [2022-07-22 22:07:50,463 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-22 22:07:50,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-22 22:07:50,646 INFO L356 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2022-07-22 22:07:50,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2022-07-22 22:07:50,885 INFO L356 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2022-07-22 22:07:50,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2022-07-22 22:07:51,233 INFO L356 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2022-07-22 22:07:51,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2022-07-22 22:07:51,790 INFO L356 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2022-07-22 22:07:51,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2022-07-22 22:07:52,332 INFO L356 Elim1Store]: treesize reduction 497, result has 12.5 percent of original size [2022-07-22 22:07:52,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 101 [2022-07-22 22:07:52,607 INFO L356 Elim1Store]: treesize reduction 497, result has 12.5 percent of original size [2022-07-22 22:07:52,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 101 [2022-07-22 22:07:53,274 INFO L356 Elim1Store]: treesize reduction 497, result has 12.5 percent of original size [2022-07-22 22:07:53,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 101 [2022-07-22 22:07:53,883 INFO L356 Elim1Store]: treesize reduction 497, result has 12.5 percent of original size [2022-07-22 22:07:53,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 101 [2022-07-22 22:07:54,267 INFO L356 Elim1Store]: treesize reduction 630, result has 11.3 percent of original size [2022-07-22 22:07:54,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 94 treesize of output 114 [2022-07-22 22:07:55,005 INFO L356 Elim1Store]: treesize reduction 772, result has 10.4 percent of original size [2022-07-22 22:07:55,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 104 treesize of output 127 [2022-07-22 22:07:55,728 INFO L356 Elim1Store]: treesize reduction 928, result has 9.7 percent of original size [2022-07-22 22:07:55,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 114 treesize of output 140 [2022-07-22 22:07:56,477 INFO L356 Elim1Store]: treesize reduction 1076, result has 9.3 percent of original size [2022-07-22 22:07:56,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 123 treesize of output 152 [2022-07-22 22:07:57,052 INFO L356 Elim1Store]: treesize reduction 1076, result has 9.3 percent of original size [2022-07-22 22:07:57,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 123 treesize of output 152 [2022-07-22 22:08:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 113 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 22:08:22,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:08:23,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728648125] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:08:23,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:08:23,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 47 [2022-07-22 22:08:23,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97699671] [2022-07-22 22:08:23,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:08:23,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-22 22:08:23,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:08:23,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-22 22:08:23,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2580, Unknown=8, NotChecked=0, Total=2756 [2022-07-22 22:08:23,846 INFO L87 Difference]: Start difference. First operand 217 states and 256 transitions. Second operand has 47 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 42 states have internal predecessors, (90), 4 states have call successors, (17), 8 states have call predecessors, (17), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16)