./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_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 9db28b965fea5f2f8d3364c7a869d0042b63b50d32f7a417c3baadcb401d0709 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:56:17,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:56:17,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:56:17,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:56:17,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:56:17,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:56:17,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:56:17,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:56:17,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:56:17,477 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:56:17,478 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:56:17,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:56:17,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:56:17,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:56:17,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:56:17,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:56:17,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:56:17,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:56:17,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:56:17,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:56:17,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:56:17,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:56:17,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:56:17,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:56:17,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:56:17,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:56:17,491 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:56:17,492 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:56:17,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:56:17,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:56:17,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:56:17,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:56:17,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:56:17,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:56:17,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:56:17,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:56:17,496 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:56:17,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:56:17,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:56:17,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:56:17,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:56:17,504 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 13:56:17,517 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:56:17,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:56:17,518 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:56:17,518 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:56:17,518 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:56:17,519 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:56:17,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:56:17,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:56:17,519 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:56:17,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:56:17,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:56:17,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:56:17,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:56:17,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:56:17,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:56:17,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:56:17,520 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:56:17,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:56:17,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:56:17,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:56:17,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:56:17,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:56:17,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:56:17,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:56:17,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:56:17,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:56:17,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:56:17,522 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:56:17,522 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:56:17,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:56:17,522 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:56:17,523 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9db28b965fea5f2f8d3364c7a869d0042b63b50d32f7a417c3baadcb401d0709 [2021-12-22 13:56:17,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:56:17,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:56:17,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:56:17,737 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:56:17,745 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:56:17,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i [2021-12-22 13:56:17,810 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dd70e181/c5e221f16d08415487998706b96b34c4/FLAGb2f66a04c [2021-12-22 13:56:18,462 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:56:18,462 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i [2021-12-22 13:56:18,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dd70e181/c5e221f16d08415487998706b96b34c4/FLAGb2f66a04c [2021-12-22 13:56:18,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dd70e181/c5e221f16d08415487998706b96b34c4 [2021-12-22 13:56:18,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:56:18,841 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:56:18,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:56:18,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:56:18,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:56:18,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:56:18" (1/1) ... [2021-12-22 13:56:18,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b450ea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:18, skipping insertion in model container [2021-12-22 13:56:18,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:56:18" (1/1) ... [2021-12-22 13:56:18,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:56:18,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:56:19,137 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4498,4511] [2021-12-22 13:56:19,142 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4558,4571] [2021-12-22 13:56:19,652 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:19,657 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:19,658 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:19,659 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:19,661 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:19,669 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:19,670 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:19,671 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:19,671 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:19,854 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-22 13:56:19,855 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-22 13:56:19,855 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-22 13:56:19,856 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-22 13:56:19,857 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-22 13:56:19,857 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-22 13:56:19,858 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-22 13:56:19,858 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-22 13:56:19,858 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-22 13:56:19,859 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-22 13:56:19,933 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-22 13:56:19,983 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:19,983 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:20,065 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:56:20,121 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:56:20,148 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4498,4511] [2021-12-22 13:56:20,149 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4558,4571] [2021-12-22 13:56:20,187 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:20,188 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:20,188 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:20,189 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:20,191 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:20,199 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:20,202 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:20,203 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:20,204 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:20,222 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-22 13:56:20,227 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-22 13:56:20,227 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-22 13:56:20,228 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-22 13:56:20,229 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-22 13:56:20,229 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-22 13:56:20,229 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-22 13:56:20,230 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-22 13:56:20,230 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-22 13:56:20,230 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-22 13:56:20,249 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-22 13:56:20,315 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:20,316 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:56:20,360 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:56:20,535 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:56:20,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:20 WrapperNode [2021-12-22 13:56:20,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:56:20,537 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:56:20,537 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:56:20,537 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:56:20,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:20" (1/1) ... [2021-12-22 13:56:20,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:20" (1/1) ... [2021-12-22 13:56:20,713 INFO L137 Inliner]: procedures = 691, calls = 2614, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 796 [2021-12-22 13:56:20,713 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:56:20,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:56:20,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:56:20,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:56:20,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:20" (1/1) ... [2021-12-22 13:56:20,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:20" (1/1) ... [2021-12-22 13:56:20,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:20" (1/1) ... [2021-12-22 13:56:20,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:20" (1/1) ... [2021-12-22 13:56:20,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:20" (1/1) ... [2021-12-22 13:56:20,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:20" (1/1) ... [2021-12-22 13:56:20,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:20" (1/1) ... [2021-12-22 13:56:20,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:56:20,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:56:20,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:56:20,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:56:20,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:20" (1/1) ... [2021-12-22 13:56:20,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:56:20,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:20,810 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 13:56:20,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 13:56:20,834 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-22 13:56:20,834 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-22 13:56:20,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:56:20,835 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-22 13:56:20,835 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-22 13:56:20,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:56:20,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 13:56:20,835 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 13:56:20,836 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_secure_zero [2021-12-22 13:56:20,836 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_secure_zero [2021-12-22 13:56:20,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 13:56:20,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:56:20,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 13:56:20,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:56:20,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:56:20,838 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-22 13:56:20,838 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-22 13:56:20,838 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 13:56:20,838 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 13:56:20,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:56:20,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 13:56:20,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 13:56:20,839 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-22 13:56:20,839 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-22 13:56:20,839 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-22 13:56:20,840 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-22 13:56:20,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:56:20,840 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-12-22 13:56:20,841 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-12-22 13:56:20,841 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-12-22 13:56:20,841 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-12-22 13:56:20,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:56:21,080 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:56:21,082 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:56:21,725 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:56:21,731 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:56:21,731 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 13:56:21,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:56:21 BoogieIcfgContainer [2021-12-22 13:56:21,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:56:21,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:56:21,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:56:21,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:56:21,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:56:18" (1/3) ... [2021-12-22 13:56:21,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307a02f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:56:21, skipping insertion in model container [2021-12-22 13:56:21,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:56:20" (2/3) ... [2021-12-22 13:56:21,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307a02f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:56:21, skipping insertion in model container [2021-12-22 13:56:21,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:56:21" (3/3) ... [2021-12-22 13:56:21,739 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_secure_zero_harness.i [2021-12-22 13:56:21,744 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:56:21,745 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:56:21,782 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:56:21,792 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 13:56:21,792 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 13:56:21,806 INFO L276 IsEmpty]: Start isEmpty. Operand has 103 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 71 states have internal predecessors, (86), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-22 13:56:21,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:56:21,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:21,814 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:21,815 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:21,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:21,820 INFO L85 PathProgramCache]: Analyzing trace with hash -70528239, now seen corresponding path program 1 times [2021-12-22 13:56:21,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:21,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551683722] [2021-12-22 13:56:21,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:21,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:56:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:56:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:56:22,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 13:56:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-22 13:56:22,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:22,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551683722] [2021-12-22 13:56:22,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551683722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:22,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:56:22,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:56:22,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040821001] [2021-12-22 13:56:22,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:22,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:56:22,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:22,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:56:22,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:56:22,386 INFO L87 Difference]: Start difference. First operand has 103 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 71 states have internal predecessors, (86), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-22 13:56:22,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:22,504 INFO L93 Difference]: Finished difference Result 202 states and 265 transitions. [2021-12-22 13:56:22,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:56:22,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 65 [2021-12-22 13:56:22,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:22,511 INFO L225 Difference]: With dead ends: 202 [2021-12-22 13:56:22,512 INFO L226 Difference]: Without dead ends: 98 [2021-12-22 13:56:22,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:56:22,516 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 58 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:22,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 138 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:56:22,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-22 13:56:22,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-12-22 13:56:22,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.196969696969697) internal successors, (79), 67 states have internal predecessors, (79), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-22 13:56:22,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2021-12-22 13:56:22,545 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 65 [2021-12-22 13:56:22,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:22,545 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2021-12-22 13:56:22,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-22 13:56:22,545 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2021-12-22 13:56:22,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:56:22,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:22,547 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:22,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:56:22,548 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:22,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:22,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1061132297, now seen corresponding path program 1 times [2021-12-22 13:56:22,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:22,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153637763] [2021-12-22 13:56:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:22,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:22,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:22,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:56:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:56:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:56:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 13:56:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-22 13:56:22,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:22,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153637763] [2021-12-22 13:56:22,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153637763] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:22,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037458125] [2021-12-22 13:56:22,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:22,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:22,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:22,777 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:22,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:56:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 2469 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 13:56:23,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 13:56:23,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:23,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037458125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:23,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:23,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-12-22 13:56:23,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048633801] [2021-12-22 13:56:23,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:23,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:56:23,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:23,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:56:23,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:56:23,311 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 13:56:23,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:23,389 INFO L93 Difference]: Finished difference Result 174 states and 217 transitions. [2021-12-22 13:56:23,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:56:23,390 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 65 [2021-12-22 13:56:23,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:23,392 INFO L225 Difference]: With dead ends: 174 [2021-12-22 13:56:23,393 INFO L226 Difference]: Without dead ends: 101 [2021-12-22 13:56:23,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-22 13:56:23,394 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 140 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:23,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 276 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:56:23,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-22 13:56:23,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-12-22 13:56:23,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 70 states have internal predecessors, (81), 21 states have call successors, (21), 10 states have call predecessors, (21), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2021-12-22 13:56:23,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2021-12-22 13:56:23,404 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 65 [2021-12-22 13:56:23,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:23,404 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2021-12-22 13:56:23,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-22 13:56:23,404 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2021-12-22 13:56:23,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-22 13:56:23,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:23,406 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:23,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:23,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:23,626 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:23,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:23,627 INFO L85 PathProgramCache]: Analyzing trace with hash -883820620, now seen corresponding path program 1 times [2021-12-22 13:56:23,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:23,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282088558] [2021-12-22 13:56:23,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:23,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:56:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:56:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:56:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-22 13:56:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-22 13:56:23,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:23,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282088558] [2021-12-22 13:56:23,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282088558] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:23,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912697218] [2021-12-22 13:56:23,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:23,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:23,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:23,969 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:23,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:56:24,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:24,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 2486 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:56:24,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 13:56:24,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:24,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912697218] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:24,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:24,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2021-12-22 13:56:24,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183127613] [2021-12-22 13:56:24,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:24,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:56:24,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:24,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:56:24,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:56:24,509 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-22 13:56:24,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:24,647 INFO L93 Difference]: Finished difference Result 172 states and 211 transitions. [2021-12-22 13:56:24,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:56:24,647 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 71 [2021-12-22 13:56:24,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:24,648 INFO L225 Difference]: With dead ends: 172 [2021-12-22 13:56:24,648 INFO L226 Difference]: Without dead ends: 98 [2021-12-22 13:56:24,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-12-22 13:56:24,650 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 150 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:24,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 428 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:56:24,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-22 13:56:24,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-12-22 13:56:24,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 67 states have internal predecessors, (78), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-22 13:56:24,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 119 transitions. [2021-12-22 13:56:24,656 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 119 transitions. Word has length 71 [2021-12-22 13:56:24,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:24,657 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 119 transitions. [2021-12-22 13:56:24,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-22 13:56:24,657 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 119 transitions. [2021-12-22 13:56:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-22 13:56:24,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:24,658 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:24,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:24,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-22 13:56:24,877 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:24,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:24,878 INFO L85 PathProgramCache]: Analyzing trace with hash 81192906, now seen corresponding path program 1 times [2021-12-22 13:56:24,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:24,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592317181] [2021-12-22 13:56:24,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:24,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:24,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:56:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:56:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 13:56:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:56:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-22 13:56:25,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:25,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592317181] [2021-12-22 13:56:25,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592317181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:25,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:56:25,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:56:25,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492011219] [2021-12-22 13:56:25,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:25,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:56:25,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:25,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:56:25,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:56:25,088 INFO L87 Difference]: Start difference. First operand 98 states and 119 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-22 13:56:25,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:25,399 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2021-12-22 13:56:25,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:56:25,399 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 83 [2021-12-22 13:56:25,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:25,400 INFO L225 Difference]: With dead ends: 110 [2021-12-22 13:56:25,400 INFO L226 Difference]: Without dead ends: 108 [2021-12-22 13:56:25,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:56:25,401 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 84 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:25,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 445 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:56:25,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-22 13:56:25,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-12-22 13:56:25,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 74 states have internal predecessors, (84), 22 states have call successors, (22), 11 states have call predecessors, (22), 12 states have return successors, (25), 21 states have call predecessors, (25), 21 states have call successors, (25) [2021-12-22 13:56:25,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2021-12-22 13:56:25,409 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 83 [2021-12-22 13:56:25,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:25,410 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2021-12-22 13:56:25,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-22 13:56:25,410 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2021-12-22 13:56:25,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-22 13:56:25,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:25,411 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:25,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:56:25,414 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:25,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:25,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1920648402, now seen corresponding path program 1 times [2021-12-22 13:56:25,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:25,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243077351] [2021-12-22 13:56:25,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:25,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:56:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:56:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 13:56:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:56:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-22 13:56:25,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:25,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243077351] [2021-12-22 13:56:25,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243077351] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:25,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:56:25,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:56:25,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897699228] [2021-12-22 13:56:25,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:25,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:56:25,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:25,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:56:25,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:56:25,774 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-22 13:56:26,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:26,072 INFO L93 Difference]: Finished difference Result 214 states and 275 transitions. [2021-12-22 13:56:26,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:56:26,072 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2021-12-22 13:56:26,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:26,074 INFO L225 Difference]: With dead ends: 214 [2021-12-22 13:56:26,074 INFO L226 Difference]: Without dead ends: 132 [2021-12-22 13:56:26,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-12-22 13:56:26,075 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 126 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:26,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 302 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:56:26,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-22 13:56:26,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2021-12-22 13:56:26,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 79 states have internal predecessors, (91), 22 states have call successors, (22), 11 states have call predecessors, (22), 12 states have return successors, (25), 21 states have call predecessors, (25), 21 states have call successors, (25) [2021-12-22 13:56:26,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2021-12-22 13:56:26,082 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 87 [2021-12-22 13:56:26,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:26,082 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2021-12-22 13:56:26,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-22 13:56:26,083 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2021-12-22 13:56:26,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-22 13:56:26,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:26,083 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:26,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:56:26,084 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:26,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:26,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2116153456, now seen corresponding path program 1 times [2021-12-22 13:56:26,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:26,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114683218] [2021-12-22 13:56:26,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:26,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:26,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:26,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:26,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:26,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:26,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:26,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:26,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:56:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:26,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:56:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:26,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 13:56:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:26,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:56:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-22 13:56:26,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:26,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114683218] [2021-12-22 13:56:26,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114683218] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:26,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967911422] [2021-12-22 13:56:26,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:26,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:26,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:26,487 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:26,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:56:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:26,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 2527 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-22 13:56:26,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:26,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 13:56:27,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 13:56:27,092 INFO L353 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-22 13:56:27,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 1 [2021-12-22 13:56:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-22 13:56:27,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:27,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967911422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:27,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:27,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 17 [2021-12-22 13:56:27,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904770635] [2021-12-22 13:56:27,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:27,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 13:56:27,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:27,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 13:56:27,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:56:27,166 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-22 13:56:27,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:27,201 INFO L93 Difference]: Finished difference Result 222 states and 275 transitions. [2021-12-22 13:56:27,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:56:27,201 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 87 [2021-12-22 13:56:27,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:27,203 INFO L225 Difference]: With dead ends: 222 [2021-12-22 13:56:27,203 INFO L226 Difference]: Without dead ends: 131 [2021-12-22 13:56:27,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:56:27,205 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 25 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:27,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 824 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 99 Unchecked, 0.0s Time] [2021-12-22 13:56:27,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-22 13:56:27,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-22 13:56:27,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 95 states have (on average 1.2) internal successors, (114), 97 states have internal predecessors, (114), 22 states have call successors, (22), 12 states have call predecessors, (22), 13 states have return successors, (25), 21 states have call predecessors, (25), 21 states have call successors, (25) [2021-12-22 13:56:27,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 161 transitions. [2021-12-22 13:56:27,220 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 161 transitions. Word has length 87 [2021-12-22 13:56:27,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:27,221 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 161 transitions. [2021-12-22 13:56:27,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-22 13:56:27,221 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 161 transitions. [2021-12-22 13:56:27,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-22 13:56:27,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:27,222 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:27,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:27,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:27,434 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:27,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:27,434 INFO L85 PathProgramCache]: Analyzing trace with hash -729368046, now seen corresponding path program 1 times [2021-12-22 13:56:27,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:27,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249781678] [2021-12-22 13:56:27,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:27,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:27,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:27,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:27,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:27,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:27,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:27,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:27,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:56:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:27,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:56:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:27,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 13:56:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:27,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:56:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-22 13:56:27,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:27,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249781678] [2021-12-22 13:56:27,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249781678] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:27,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832863473] [2021-12-22 13:56:27,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:27,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:27,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:27,590 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:27,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:56:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:28,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 2522 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:56:28,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-22 13:56:28,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:28,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832863473] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:28,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:28,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-22 13:56:28,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997774454] [2021-12-22 13:56:28,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:28,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:56:28,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:28,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:56:28,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:56:28,107 INFO L87 Difference]: Start difference. First operand 131 states and 161 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-22 13:56:28,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:28,127 INFO L93 Difference]: Finished difference Result 231 states and 291 transitions. [2021-12-22 13:56:28,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:56:28,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2021-12-22 13:56:28,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:28,129 INFO L225 Difference]: With dead ends: 231 [2021-12-22 13:56:28,129 INFO L226 Difference]: Without dead ends: 140 [2021-12-22 13:56:28,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:56:28,130 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 20 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:28,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 349 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:56:28,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-22 13:56:28,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 123. [2021-12-22 13:56:28,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 89 states have internal predecessors, (105), 22 states have call successors, (22), 12 states have call predecessors, (22), 12 states have return successors, (24), 21 states have call predecessors, (24), 21 states have call successors, (24) [2021-12-22 13:56:28,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 151 transitions. [2021-12-22 13:56:28,135 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 151 transitions. Word has length 87 [2021-12-22 13:56:28,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:28,136 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 151 transitions. [2021-12-22 13:56:28,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-22 13:56:28,136 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 151 transitions. [2021-12-22 13:56:28,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 13:56:28,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:28,137 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:28,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:28,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:28,359 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:28,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:28,359 INFO L85 PathProgramCache]: Analyzing trace with hash -2043691690, now seen corresponding path program 2 times [2021-12-22 13:56:28,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:28,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918081616] [2021-12-22 13:56:28,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:28,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:28,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:28,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:28,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:28,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:28,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:28,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:28,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:28,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:56:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:28,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:56:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:28,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:56:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:28,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 13:56:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-22 13:56:28,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:28,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918081616] [2021-12-22 13:56:28,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918081616] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:28,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444903028] [2021-12-22 13:56:28,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:56:28,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:28,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:28,649 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:28,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 13:56:29,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 13:56:29,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:56:29,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 2334 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-22 13:56:29,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:29,174 INFO L353 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-22 13:56:29,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 13:56:29,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:56:29,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 13:56:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-22 13:56:29,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:29,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444903028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:29,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:29,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2021-12-22 13:56:29,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517263275] [2021-12-22 13:56:29,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:29,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:56:29,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:29,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:56:29,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:56:29,669 INFO L87 Difference]: Start difference. First operand 123 states and 151 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-22 13:56:29,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:29,884 INFO L93 Difference]: Finished difference Result 226 states and 276 transitions. [2021-12-22 13:56:29,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:56:29,884 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2021-12-22 13:56:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:29,885 INFO L225 Difference]: With dead ends: 226 [2021-12-22 13:56:29,885 INFO L226 Difference]: Without dead ends: 160 [2021-12-22 13:56:29,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-12-22 13:56:29,886 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 64 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:29,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 505 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 101 Unchecked, 0.1s Time] [2021-12-22 13:56:29,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-22 13:56:29,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-12-22 13:56:29,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 125 states have internal predecessors, (148), 23 states have call successors, (23), 13 states have call predecessors, (23), 14 states have return successors, (26), 21 states have call predecessors, (26), 22 states have call successors, (26) [2021-12-22 13:56:29,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 197 transitions. [2021-12-22 13:56:29,895 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 197 transitions. Word has length 91 [2021-12-22 13:56:29,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:29,896 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 197 transitions. [2021-12-22 13:56:29,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-22 13:56:29,896 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 197 transitions. [2021-12-22 13:56:29,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 13:56:29,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:29,897 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:29,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:30,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:30,112 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:30,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:30,112 INFO L85 PathProgramCache]: Analyzing trace with hash 971411928, now seen corresponding path program 2 times [2021-12-22 13:56:30,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:30,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095642141] [2021-12-22 13:56:30,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:30,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:30,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:30,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:30,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:30,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:30,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:30,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:56:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:30,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:56:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:30,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:56:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:30,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 13:56:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:30,405 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-22 13:56:30,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:30,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095642141] [2021-12-22 13:56:30,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095642141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:30,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:56:30,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:56:30,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12915808] [2021-12-22 13:56:30,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:30,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:56:30,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:30,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:56:30,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:56:30,408 INFO L87 Difference]: Start difference. First operand 160 states and 197 transitions. Second operand has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-22 13:56:30,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:30,729 INFO L93 Difference]: Finished difference Result 259 states and 316 transitions. [2021-12-22 13:56:30,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:56:30,729 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2021-12-22 13:56:30,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:30,730 INFO L225 Difference]: With dead ends: 259 [2021-12-22 13:56:30,731 INFO L226 Difference]: Without dead ends: 187 [2021-12-22 13:56:30,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:56:30,731 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 136 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:30,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 335 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:56:30,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-22 13:56:30,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 169. [2021-12-22 13:56:30,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 130 states have (on average 1.2076923076923076) internal successors, (157), 134 states have internal predecessors, (157), 23 states have call successors, (23), 13 states have call predecessors, (23), 15 states have return successors, (29), 21 states have call predecessors, (29), 22 states have call successors, (29) [2021-12-22 13:56:30,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 209 transitions. [2021-12-22 13:56:30,740 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 209 transitions. Word has length 91 [2021-12-22 13:56:30,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:30,741 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 209 transitions. [2021-12-22 13:56:30,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-22 13:56:30,741 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 209 transitions. [2021-12-22 13:56:30,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 13:56:30,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:30,743 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:30,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:56:30,743 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:30,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:30,744 INFO L85 PathProgramCache]: Analyzing trace with hash -875101412, now seen corresponding path program 1 times [2021-12-22 13:56:30,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:30,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205159303] [2021-12-22 13:56:30,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:30,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:30,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:30,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:30,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:30,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:30,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:30,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:56:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:30,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:56:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:30,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:56:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:30,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 13:56:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-22 13:56:31,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:31,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205159303] [2021-12-22 13:56:31,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205159303] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:31,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949595114] [2021-12-22 13:56:31,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:31,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:31,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:31,011 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:31,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 13:56:31,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:31,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 2531 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-22 13:56:31,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:31,649 INFO L353 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-22 13:56:31,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-22 13:56:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 40 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 13:56:32,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:56:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-22 13:56:32,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949595114] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:56:32,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:56:32,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 24 [2021-12-22 13:56:32,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304792833] [2021-12-22 13:56:32,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:56:32,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-22 13:56:32,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:32,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-22 13:56:32,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-12-22 13:56:32,519 INFO L87 Difference]: Start difference. First operand 169 states and 209 transitions. Second operand has 24 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (19), 4 states have call predecessors, (19), 7 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-22 13:56:33,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:33,989 INFO L93 Difference]: Finished difference Result 368 states and 465 transitions. [2021-12-22 13:56:33,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-22 13:56:33,992 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (19), 4 states have call predecessors, (19), 7 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 91 [2021-12-22 13:56:33,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:33,995 INFO L225 Difference]: With dead ends: 368 [2021-12-22 13:56:33,995 INFO L226 Difference]: Without dead ends: 233 [2021-12-22 13:56:33,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 185 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=321, Invalid=1659, Unknown=0, NotChecked=0, Total=1980 [2021-12-22 13:56:33,998 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 284 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 304 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:33,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 699 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1256 Invalid, 0 Unknown, 304 Unchecked, 0.9s Time] [2021-12-22 13:56:33,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-22 13:56:34,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 222. [2021-12-22 13:56:34,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 173 states have (on average 1.1734104046242775) internal successors, (203), 183 states have internal predecessors, (203), 25 states have call successors, (25), 15 states have call predecessors, (25), 23 states have return successors, (49), 23 states have call predecessors, (49), 24 states have call successors, (49) [2021-12-22 13:56:34,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 277 transitions. [2021-12-22 13:56:34,020 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 277 transitions. Word has length 91 [2021-12-22 13:56:34,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:34,020 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 277 transitions. [2021-12-22 13:56:34,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (19), 4 states have call predecessors, (19), 7 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-22 13:56:34,020 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 277 transitions. [2021-12-22 13:56:34,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-22 13:56:34,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:34,022 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:34,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:34,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:34,242 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:34,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:34,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1597930877, now seen corresponding path program 1 times [2021-12-22 13:56:34,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:34,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641303510] [2021-12-22 13:56:34,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:34,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:34,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:34,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:34,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:34,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:34,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:34,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:34,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:34,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:56:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:34,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:56:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:34,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:56:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-22 13:56:34,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:34,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641303510] [2021-12-22 13:56:34,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641303510] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:34,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700027606] [2021-12-22 13:56:34,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:34,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:34,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:34,389 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:34,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 13:56:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:34,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 2533 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:56:34,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:34,841 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-22 13:56:34,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:34,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700027606] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:34,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:34,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-22 13:56:34,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005791902] [2021-12-22 13:56:34,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:34,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:56:34,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:34,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:56:34,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:56:34,844 INFO L87 Difference]: Start difference. First operand 222 states and 277 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-22 13:56:34,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:34,863 INFO L93 Difference]: Finished difference Result 404 states and 514 transitions. [2021-12-22 13:56:34,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:56:34,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 93 [2021-12-22 13:56:34,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:34,865 INFO L225 Difference]: With dead ends: 404 [2021-12-22 13:56:34,865 INFO L226 Difference]: Without dead ends: 207 [2021-12-22 13:56:34,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:56:34,866 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 9 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:34,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 342 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:56:34,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-22 13:56:34,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 198. [2021-12-22 13:56:34,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 152 states have (on average 1.144736842105263) internal successors, (174), 159 states have internal predecessors, (174), 25 states have call successors, (25), 15 states have call predecessors, (25), 20 states have return successors, (40), 23 states have call predecessors, (40), 24 states have call successors, (40) [2021-12-22 13:56:34,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 239 transitions. [2021-12-22 13:56:34,876 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 239 transitions. Word has length 93 [2021-12-22 13:56:34,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:34,876 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 239 transitions. [2021-12-22 13:56:34,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-22 13:56:34,876 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 239 transitions. [2021-12-22 13:56:34,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-22 13:56:34,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:34,877 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:34,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:35,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:35,092 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:35,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:35,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1845910727, now seen corresponding path program 1 times [2021-12-22 13:56:35,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:35,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477427017] [2021-12-22 13:56:35,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:35,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:35,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:35,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:35,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:35,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:35,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:35,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:35,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:56:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:35,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:56:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:35,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:56:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-22 13:56:35,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:35,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477427017] [2021-12-22 13:56:35,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477427017] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:35,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600817137] [2021-12-22 13:56:35,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:35,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:35,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:35,240 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:35,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 13:56:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:35,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 2535 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:56:35,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-22 13:56:35,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:35,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600817137] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:35,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:35,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-22 13:56:35,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103238163] [2021-12-22 13:56:35,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:35,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:56:35,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:35,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:56:35,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:56:35,709 INFO L87 Difference]: Start difference. First operand 198 states and 239 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-22 13:56:35,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:35,726 INFO L93 Difference]: Finished difference Result 350 states and 436 transitions. [2021-12-22 13:56:35,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:56:35,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 93 [2021-12-22 13:56:35,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:35,728 INFO L225 Difference]: With dead ends: 350 [2021-12-22 13:56:35,728 INFO L226 Difference]: Without dead ends: 182 [2021-12-22 13:56:35,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:56:35,729 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 34 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:35,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 340 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:56:35,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-22 13:56:35,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2021-12-22 13:56:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 136 states have (on average 1.125) internal successors, (153), 141 states have internal predecessors, (153), 25 states have call successors, (25), 15 states have call predecessors, (25), 18 states have return successors, (36), 23 states have call predecessors, (36), 24 states have call successors, (36) [2021-12-22 13:56:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 214 transitions. [2021-12-22 13:56:35,738 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 214 transitions. Word has length 93 [2021-12-22 13:56:35,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:35,738 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 214 transitions. [2021-12-22 13:56:35,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-22 13:56:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 214 transitions. [2021-12-22 13:56:35,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-22 13:56:35,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:35,740 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:35,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:35,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-22 13:56:35,955 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:35,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:35,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1337532371, now seen corresponding path program 1 times [2021-12-22 13:56:35,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:35,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138410247] [2021-12-22 13:56:35,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:35,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:36,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:36,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:36,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:36,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:36,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:36,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:36,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:36,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:36,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:56:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:36,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:56:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:36,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-22 13:56:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-22 13:56:36,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:36,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138410247] [2021-12-22 13:56:36,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138410247] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:36,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378395650] [2021-12-22 13:56:36,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:36,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:36,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:36,179 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:36,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 13:56:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:36,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 2537 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-22 13:56:36,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:36,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 13:56:37,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 13:56:37,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:56:37,041 INFO L387 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 18 treesize of output 11 [2021-12-22 13:56:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-22 13:56:37,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:37,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378395650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:37,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:37,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 19 [2021-12-22 13:56:37,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505608856] [2021-12-22 13:56:37,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:37,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 13:56:37,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:37,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 13:56:37,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-12-22 13:56:37,081 INFO L87 Difference]: Start difference. First operand 180 states and 214 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-22 13:56:37,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:37,192 INFO L93 Difference]: Finished difference Result 367 states and 438 transitions. [2021-12-22 13:56:37,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 13:56:37,193 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 97 [2021-12-22 13:56:37,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:37,195 INFO L225 Difference]: With dead ends: 367 [2021-12-22 13:56:37,195 INFO L226 Difference]: Without dead ends: 248 [2021-12-22 13:56:37,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-12-22 13:56:37,196 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 22 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:37,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 909 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2021-12-22 13:56:37,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-12-22 13:56:37,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 233. [2021-12-22 13:56:37,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 179 states have (on average 1.1229050279329609) internal successors, (201), 185 states have internal predecessors, (201), 30 states have call successors, (30), 19 states have call predecessors, (30), 23 states have return successors, (47), 28 states have call predecessors, (47), 29 states have call successors, (47) [2021-12-22 13:56:37,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 278 transitions. [2021-12-22 13:56:37,207 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 278 transitions. Word has length 97 [2021-12-22 13:56:37,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:37,208 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 278 transitions. [2021-12-22 13:56:37,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-22 13:56:37,209 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 278 transitions. [2021-12-22 13:56:37,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-22 13:56:37,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:37,210 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:37,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:37,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-22 13:56:37,410 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:37,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:37,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1898232149, now seen corresponding path program 1 times [2021-12-22 13:56:37,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:37,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845467086] [2021-12-22 13:56:37,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:37,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:37,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:37,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:37,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:37,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:37,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:37,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:37,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:56:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:37,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:56:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:37,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-22 13:56:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-22 13:56:37,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:37,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845467086] [2021-12-22 13:56:37,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845467086] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:37,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232957805] [2021-12-22 13:56:37,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:37,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:37,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:37,688 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:37,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 13:56:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:38,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 2542 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-22 13:56:38,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:38,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 13:56:38,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 13:56:38,554 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:56:38,554 INFO L387 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 18 treesize of output 11 [2021-12-22 13:56:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-22 13:56:38,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:38,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232957805] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:38,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:38,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 19 [2021-12-22 13:56:38,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291223404] [2021-12-22 13:56:38,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:38,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 13:56:38,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:38,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 13:56:38,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-12-22 13:56:38,595 INFO L87 Difference]: Start difference. First operand 233 states and 278 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-22 13:56:38,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:38,683 INFO L93 Difference]: Finished difference Result 385 states and 441 transitions. [2021-12-22 13:56:38,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 13:56:38,684 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 97 [2021-12-22 13:56:38,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:38,685 INFO L225 Difference]: With dead ends: 385 [2021-12-22 13:56:38,685 INFO L226 Difference]: Without dead ends: 266 [2021-12-22 13:56:38,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-12-22 13:56:38,686 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 25 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:38,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 669 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2021-12-22 13:56:38,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-22 13:56:38,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 245. [2021-12-22 13:56:38,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 190 states have (on average 1.1157894736842104) internal successors, (212), 197 states have internal predecessors, (212), 29 states have call successors, (29), 20 states have call predecessors, (29), 25 states have return successors, (43), 27 states have call predecessors, (43), 28 states have call successors, (43) [2021-12-22 13:56:38,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 284 transitions. [2021-12-22 13:56:38,694 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 284 transitions. Word has length 97 [2021-12-22 13:56:38,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:38,695 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 284 transitions. [2021-12-22 13:56:38,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-22 13:56:38,695 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 284 transitions. [2021-12-22 13:56:38,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-22 13:56:38,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:38,696 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:38,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:38,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 13:56:38,918 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:38,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:38,919 INFO L85 PathProgramCache]: Analyzing trace with hash 2013780926, now seen corresponding path program 1 times [2021-12-22 13:56:38,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:38,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945411790] [2021-12-22 13:56:38,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:38,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:56:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:39,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:56:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:56:39,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:56:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-22 13:56:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-22 13:56:39,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:39,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945411790] [2021-12-22 13:56:39,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945411790] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:39,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:56:39,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:56:39,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043193721] [2021-12-22 13:56:39,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:39,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:56:39,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:39,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:56:39,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:56:39,160 INFO L87 Difference]: Start difference. First operand 245 states and 284 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-22 13:56:39,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:39,557 INFO L93 Difference]: Finished difference Result 263 states and 303 transitions. [2021-12-22 13:56:39,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:56:39,557 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 109 [2021-12-22 13:56:39,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:39,558 INFO L225 Difference]: With dead ends: 263 [2021-12-22 13:56:39,558 INFO L226 Difference]: Without dead ends: 261 [2021-12-22 13:56:39,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:56:39,559 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 139 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:39,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 457 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:56:39,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-22 13:56:39,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 250. [2021-12-22 13:56:39,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 193 states have (on average 1.1139896373056994) internal successors, (215), 200 states have internal predecessors, (215), 30 states have call successors, (30), 21 states have call predecessors, (30), 26 states have return successors, (44), 28 states have call predecessors, (44), 29 states have call successors, (44) [2021-12-22 13:56:39,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 289 transitions. [2021-12-22 13:56:39,568 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 289 transitions. Word has length 109 [2021-12-22 13:56:39,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:39,568 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 289 transitions. [2021-12-22 13:56:39,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-22 13:56:39,568 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 289 transitions. [2021-12-22 13:56:39,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-22 13:56:39,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:39,578 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:39,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 13:56:39,578 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:39,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:39,579 INFO L85 PathProgramCache]: Analyzing trace with hash 920679761, now seen corresponding path program 1 times [2021-12-22 13:56:39,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:39,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003965332] [2021-12-22 13:56:39,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:39,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:56:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:56:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 13:56:39,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:39,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:40,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:40,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 13:56:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-22 13:56:40,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:40,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003965332] [2021-12-22 13:56:40,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003965332] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:40,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598791394] [2021-12-22 13:56:40,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:40,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:40,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:40,036 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:40,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 13:56:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:40,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 2629 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-22 13:56:40,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:40,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:56:40,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:56:40,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-22 13:56:40,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-22 13:56:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 13:56:40,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:40,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598791394] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:40,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:40,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 23 [2021-12-22 13:56:40,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803110748] [2021-12-22 13:56:40,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:40,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:56:40,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:40,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:56:40,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-12-22 13:56:40,858 INFO L87 Difference]: Start difference. First operand 250 states and 289 transitions. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-22 13:56:41,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:41,093 INFO L93 Difference]: Finished difference Result 367 states and 423 transitions. [2021-12-22 13:56:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:56:41,095 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 111 [2021-12-22 13:56:41,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:41,096 INFO L225 Difference]: With dead ends: 367 [2021-12-22 13:56:41,096 INFO L226 Difference]: Without dead ends: 257 [2021-12-22 13:56:41,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-12-22 13:56:41,097 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 51 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:41,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 686 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2021-12-22 13:56:41,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-22 13:56:41,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2021-12-22 13:56:41,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 198 states have (on average 1.1111111111111112) internal successors, (220), 204 states have internal predecessors, (220), 31 states have call successors, (31), 22 states have call predecessors, (31), 27 states have return successors, (44), 30 states have call predecessors, (44), 30 states have call successors, (44) [2021-12-22 13:56:41,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 295 transitions. [2021-12-22 13:56:41,106 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 295 transitions. Word has length 111 [2021-12-22 13:56:41,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:41,107 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 295 transitions. [2021-12-22 13:56:41,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-22 13:56:41,107 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 295 transitions. [2021-12-22 13:56:41,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-22 13:56:41,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:41,109 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:41,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:41,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-22 13:56:41,327 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:41,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:41,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1859335804, now seen corresponding path program 1 times [2021-12-22 13:56:41,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:41,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136485891] [2021-12-22 13:56:41,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:41,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:41,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:41,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:41,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:41,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:41,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:41,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:41,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:41,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:56:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:41,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:41,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:56:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:41,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:56:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:41,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:56:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:41,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-22 13:56:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-22 13:56:41,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:41,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136485891] [2021-12-22 13:56:41,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136485891] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:41,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475667273] [2021-12-22 13:56:41,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:41,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:41,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:41,794 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:41,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 13:56:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:42,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 2587 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-22 13:56:42,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:42,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 13:56:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 47 proven. 26 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-22 13:56:43,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:56:43,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-22 13:56:43,507 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-22 13:56:43,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475667273] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:43,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 13:56:43,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14, 12] total 30 [2021-12-22 13:56:43,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456966532] [2021-12-22 13:56:43,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:43,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:56:43,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:43,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:56:43,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2021-12-22 13:56:43,508 INFO L87 Difference]: Start difference. First operand 257 states and 295 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-22 13:56:43,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:43,934 INFO L93 Difference]: Finished difference Result 341 states and 389 transitions. [2021-12-22 13:56:43,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:56:43,935 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 113 [2021-12-22 13:56:43,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:43,936 INFO L225 Difference]: With dead ends: 341 [2021-12-22 13:56:43,936 INFO L226 Difference]: Without dead ends: 241 [2021-12-22 13:56:43,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 230 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2021-12-22 13:56:43,937 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 70 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:43,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 351 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:56:43,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-12-22 13:56:43,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 184. [2021-12-22 13:56:43,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 139 states have (on average 1.1151079136690647) internal successors, (155), 144 states have internal predecessors, (155), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (31), 23 states have call predecessors, (31), 23 states have call successors, (31) [2021-12-22 13:56:43,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 210 transitions. [2021-12-22 13:56:43,947 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 210 transitions. Word has length 113 [2021-12-22 13:56:43,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:43,947 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 210 transitions. [2021-12-22 13:56:43,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-22 13:56:43,948 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 210 transitions. [2021-12-22 13:56:43,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-22 13:56:43,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:43,949 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:43,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:44,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-22 13:56:44,167 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:44,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:44,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1216300311, now seen corresponding path program 1 times [2021-12-22 13:56:44,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:44,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867718728] [2021-12-22 13:56:44,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:44,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:44,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:44,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:44,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:44,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:44,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:44,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:44,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:56:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:44,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:56:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:44,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:56:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:44,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:44,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:44,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-22 13:56:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-22 13:56:44,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:44,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867718728] [2021-12-22 13:56:44,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867718728] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:44,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340641658] [2021-12-22 13:56:44,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:44,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:44,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:44,488 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:44,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 13:56:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:44,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-22 13:56:44,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:45,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 13:56:45,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:56:45,418 INFO L387 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 20 treesize of output 13 [2021-12-22 13:56:45,567 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 13:56:45,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:56:45,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-12-22 13:56:46,005 INFO L353 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-22 13:56:46,006 INFO L387 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 24 treesize of output 19 [2021-12-22 13:56:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-22 13:56:46,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340641658] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:56:46,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:56:46,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 13] total 32 [2021-12-22 13:56:46,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541957652] [2021-12-22 13:56:46,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:56:46,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-22 13:56:46,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:46,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-22 13:56:46,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=913, Unknown=0, NotChecked=0, Total=992 [2021-12-22 13:56:46,075 INFO L87 Difference]: Start difference. First operand 184 states and 210 transitions. Second operand has 32 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 states have internal predecessors, (140), 14 states have call successors, (34), 7 states have call predecessors, (34), 8 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2021-12-22 13:56:48,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:48,303 INFO L93 Difference]: Finished difference Result 348 states and 401 transitions. [2021-12-22 13:56:48,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-22 13:56:48,304 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 states have internal predecessors, (140), 14 states have call successors, (34), 7 states have call predecessors, (34), 8 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) Word has length 115 [2021-12-22 13:56:48,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:48,305 INFO L225 Difference]: With dead ends: 348 [2021-12-22 13:56:48,305 INFO L226 Difference]: Without dead ends: 198 [2021-12-22 13:56:48,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 226 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=434, Invalid=4674, Unknown=4, NotChecked=0, Total=5112 [2021-12-22 13:56:48,307 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 278 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 2306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:48,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 1349 Invalid, 2306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1923 Invalid, 0 Unknown, 260 Unchecked, 1.0s Time] [2021-12-22 13:56:48,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-22 13:56:48,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 154. [2021-12-22 13:56:48,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 113 states have (on average 1.0973451327433628) internal successors, (124), 116 states have internal predecessors, (124), 23 states have call successors, (23), 15 states have call predecessors, (23), 17 states have return successors, (25), 22 states have call predecessors, (25), 22 states have call successors, (25) [2021-12-22 13:56:48,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 172 transitions. [2021-12-22 13:56:48,314 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 172 transitions. Word has length 115 [2021-12-22 13:56:48,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:48,314 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 172 transitions. [2021-12-22 13:56:48,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 states have internal predecessors, (140), 14 states have call successors, (34), 7 states have call predecessors, (34), 8 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2021-12-22 13:56:48,314 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 172 transitions. [2021-12-22 13:56:48,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-22 13:56:48,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:48,315 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:48,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:48,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 13:56:48,535 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:48,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:48,536 INFO L85 PathProgramCache]: Analyzing trace with hash -140184041, now seen corresponding path program 1 times [2021-12-22 13:56:48,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:48,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802981385] [2021-12-22 13:56:48,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:48,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:48,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:48,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:48,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:48,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:48,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:48,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:48,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:48,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:48,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:56:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:48,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 13:56:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:48,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:56:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:48,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:48,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:48,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:56:48,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-22 13:56:48,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:48,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802981385] [2021-12-22 13:56:48,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802981385] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:48,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:56:48,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:56:48,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281632358] [2021-12-22 13:56:48,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:48,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:56:48,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:48,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:56:48,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:56:48,722 INFO L87 Difference]: Start difference. First operand 154 states and 172 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-22 13:56:48,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:48,913 INFO L93 Difference]: Finished difference Result 244 states and 274 transitions. [2021-12-22 13:56:48,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:56:48,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 118 [2021-12-22 13:56:48,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:48,914 INFO L225 Difference]: With dead ends: 244 [2021-12-22 13:56:48,914 INFO L226 Difference]: Without dead ends: 156 [2021-12-22 13:56:48,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:56:48,915 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 99 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:48,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 180 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:56:48,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-22 13:56:48,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-12-22 13:56:48,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 114 states have (on average 1.0964912280701755) internal successors, (125), 117 states have internal predecessors, (125), 23 states have call successors, (23), 15 states have call predecessors, (23), 17 states have return successors, (25), 22 states have call predecessors, (25), 22 states have call successors, (25) [2021-12-22 13:56:48,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 173 transitions. [2021-12-22 13:56:48,923 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 173 transitions. Word has length 118 [2021-12-22 13:56:48,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:48,923 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 173 transitions. [2021-12-22 13:56:48,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-22 13:56:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 173 transitions. [2021-12-22 13:56:48,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-22 13:56:48,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:48,929 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:48,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 13:56:48,929 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:48,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:48,930 INFO L85 PathProgramCache]: Analyzing trace with hash 693312025, now seen corresponding path program 1 times [2021-12-22 13:56:48,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:48,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803636303] [2021-12-22 13:56:48,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:48,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:49,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:49,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:49,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:49,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:49,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:49,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:49,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:56:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:49,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 13:56:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:50,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:56:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:50,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:50,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:50,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-22 13:56:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:50,399 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-22 13:56:50,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:50,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803636303] [2021-12-22 13:56:50,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803636303] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:50,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091071632] [2021-12-22 13:56:50,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:50,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:50,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:50,401 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:50,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 13:56:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:50,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 2664 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-22 13:56:50,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:50,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 13:56:53,030 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_46| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_46|) 8) 1) |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_46|)) is different from true [2021-12-22 13:56:55,129 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_47| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_47|) 8) 1) |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_47|)) is different from true [2021-12-22 13:56:57,258 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_21| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_21|) 8) 1) |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_21|)) is different from true