./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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_linked_list_push_back_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 d155cc00d5c2ba6f5ef1d5e883c6d133605de01ed97e4300960f893025d81fd1 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:07:01,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:07:01,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:07:02,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:07:02,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:07:02,048 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:07:02,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:07:02,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:07:02,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:07:02,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:07:02,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:07:02,057 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:07:02,057 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:07:02,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:07:02,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:07:02,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:07:02,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:07:02,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:07:02,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:07:02,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:07:02,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:07:02,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:07:02,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:07:02,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:07:02,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:07:02,082 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:07:02,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:07:02,083 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:07:02,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:07:02,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:07:02,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:07:02,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:07:02,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:07:02,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:07:02,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:07:02,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:07:02,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:07:02,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:07:02,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:07:02,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:07:02,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:07:02,091 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:07:02,117 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:07:02,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:07:02,121 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:07:02,121 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:07:02,122 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:07:02,122 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:07:02,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:07:02,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:07:02,123 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:07:02,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:07:02,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:07:02,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:07:02,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:07:02,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:07:02,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:07:02,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:07:02,124 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:07:02,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:07:02,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:07:02,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:07:02,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:07:02,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:07:02,125 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:07:02,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:07:02,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:07:02,126 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:07:02,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:07:02,126 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:07:02,127 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:07:02,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:07:02,127 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:07:02,127 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d155cc00d5c2ba6f5ef1d5e883c6d133605de01ed97e4300960f893025d81fd1 [2021-12-14 17:07:02,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:07:02,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:07:02,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:07:02,338 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:07:02,340 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:07:02,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i [2021-12-14 17:07:02,390 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea250ca22/6c6229800d94406ca6d5069cec4b7702/FLAG970f029ea [2021-12-14 17:07:02,897 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:07:02,898 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i [2021-12-14 17:07:02,925 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea250ca22/6c6229800d94406ca6d5069cec4b7702/FLAG970f029ea [2021-12-14 17:07:03,413 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea250ca22/6c6229800d94406ca6d5069cec4b7702 [2021-12-14 17:07:03,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:07:03,416 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:07:03,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:07:03,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:07:03,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:07:03,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:07:03" (1/1) ... [2021-12-14 17:07:03,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cdd8507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:03, skipping insertion in model container [2021-12-14 17:07:03,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:07:03" (1/1) ... [2021-12-14 17:07:03,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:07:03,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:07:03,678 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_linked_list_push_back_harness.i[4499,4512] [2021-12-14 17:07:03,682 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_linked_list_push_back_harness.i[4559,4572] [2021-12-14 17:07:04,142 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,142 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,148 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,149 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,150 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,159 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,163 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,167 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,169 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,172 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,172 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,173 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,174 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,344 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:07:04,344 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:07:04,345 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:07:04,346 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:07:04,346 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:07:04,347 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:07:04,347 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:07:04,348 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:07:04,348 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:07:04,348 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:07:04,427 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:07:04,446 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:07:04,460 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:07:04,469 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_linked_list_push_back_harness.i[4499,4512] [2021-12-14 17:07:04,470 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_linked_list_push_back_harness.i[4559,4572] [2021-12-14 17:07:04,494 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,495 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,495 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,496 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,496 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,501 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,501 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,502 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,502 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,503 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,504 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,504 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,504 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:04,577 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:07:04,579 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:07:04,580 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:07:04,580 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:07:04,591 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:07:04,591 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:07:04,592 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:07:04,592 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:07:04,592 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:07:04,592 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:07:04,619 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:07:04,632 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:07:04,748 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:07:04,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:04 WrapperNode [2021-12-14 17:07:04,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:07:04,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:07:04,749 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:07:04,750 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:07:04,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:04" (1/1) ... [2021-12-14 17:07:04,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:04" (1/1) ... [2021-12-14 17:07:04,846 INFO L137 Inliner]: procedures = 679, calls = 1048, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 150 [2021-12-14 17:07:04,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:07:04,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:07:04,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:07:04,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:07:04,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:04" (1/1) ... [2021-12-14 17:07:04,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:04" (1/1) ... [2021-12-14 17:07:04,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:04" (1/1) ... [2021-12-14 17:07:04,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:04" (1/1) ... [2021-12-14 17:07:04,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:04" (1/1) ... [2021-12-14 17:07:04,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:04" (1/1) ... [2021-12-14 17:07:04,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:04" (1/1) ... [2021-12-14 17:07:04,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:07:04,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:07:04,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:07:04,884 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:07:04,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:04" (1/1) ... [2021-12-14 17:07:04,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:07:04,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:04,928 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) [2021-12-14 17:07:04,935 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 [2021-12-14 17:07:04,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:07:04,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-14 17:07:04,958 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-14 17:07:04,959 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-12-14 17:07:04,959 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-12-14 17:07:04,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:07:04,960 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-12-14 17:07:04,960 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-12-14 17:07:04,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:07:04,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:07:04,961 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_insert_before [2021-12-14 17:07:04,961 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_insert_before [2021-12-14 17:07:04,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:07:04,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:07:04,962 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 17:07:04,962 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 17:07:04,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:07:04,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:07:04,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:07:04,962 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-14 17:07:04,962 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-14 17:07:04,963 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-12-14 17:07:04,963 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-12-14 17:07:04,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:07:05,146 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:07:05,148 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:07:05,416 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:07:05,421 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:07:05,421 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 17:07:05,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:07:05 BoogieIcfgContainer [2021-12-14 17:07:05,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:07:05,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:07:05,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:07:05,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:07:05,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:07:03" (1/3) ... [2021-12-14 17:07:05,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d3cec71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:07:05, skipping insertion in model container [2021-12-14 17:07:05,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:04" (2/3) ... [2021-12-14 17:07:05,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d3cec71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:07:05, skipping insertion in model container [2021-12-14 17:07:05,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:07:05" (3/3) ... [2021-12-14 17:07:05,428 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_push_back_harness.i [2021-12-14 17:07:05,432 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:07:05,432 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:07:05,461 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:07:05,466 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 [2021-12-14 17:07:05,466 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:07:05,478 INFO L276 IsEmpty]: Start isEmpty. Operand has 102 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 66 states have internal predecessors, (84), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-14 17:07:05,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-14 17:07:05,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:05,483 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-14 17:07:05,484 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:05,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:05,487 INFO L85 PathProgramCache]: Analyzing trace with hash 524704703, now seen corresponding path program 1 times [2021-12-14 17:07:05,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:05,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887015104] [2021-12-14 17:07:05,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:05,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:05,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:05,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:05,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:05,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 17:07:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:05,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:07:05,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:05,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:07:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:05,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:07:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:05,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:07:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:05,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:07:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-14 17:07:05,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:05,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887015104] [2021-12-14 17:07:05,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887015104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:05,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:07:05,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:07:05,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046502850] [2021-12-14 17:07:05,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:05,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:07:05,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:05,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:07:05,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:07:05,998 INFO L87 Difference]: Start difference. First operand has 102 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 66 states have internal predecessors, (84), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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) [2021-12-14 17:07:06,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:06,081 INFO L93 Difference]: Finished difference Result 208 states and 310 transitions. [2021-12-14 17:07:06,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:07:06,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 73 [2021-12-14 17:07:06,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:06,093 INFO L225 Difference]: With dead ends: 208 [2021-12-14 17:07:06,093 INFO L226 Difference]: Without dead ends: 109 [2021-12-14 17:07:06,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:07:06,108 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 21 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:06,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 398 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:07:06,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-14 17:07:06,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-12-14 17:07:06,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-14 17:07:06,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2021-12-14 17:07:06,155 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 73 [2021-12-14 17:07:06,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:06,156 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2021-12-14 17:07:06,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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) [2021-12-14 17:07:06,156 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2021-12-14 17:07:06,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-14 17:07:06,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:06,161 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-14 17:07:06,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:07:06,161 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:06,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:06,162 INFO L85 PathProgramCache]: Analyzing trace with hash -125862913, now seen corresponding path program 1 times [2021-12-14 17:07:06,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:06,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129151466] [2021-12-14 17:07:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:06,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 17:07:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:07:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:07:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:07:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:07:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:07:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-14 17:07:06,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:06,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129151466] [2021-12-14 17:07:06,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129151466] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:06,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:07:06,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:07:06,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907519762] [2021-12-14 17:07:06,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:06,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:07:06,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:06,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:07:06,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:07:06,404 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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) [2021-12-14 17:07:06,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:06,442 INFO L93 Difference]: Finished difference Result 192 states and 265 transitions. [2021-12-14 17:07:06,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:07:06,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 73 [2021-12-14 17:07:06,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:06,445 INFO L225 Difference]: With dead ends: 192 [2021-12-14 17:07:06,445 INFO L226 Difference]: Without dead ends: 107 [2021-12-14 17:07:06,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:07:06,448 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 12 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:06,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 380 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:07:06,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-14 17:07:06,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2021-12-14 17:07:06,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 66 states have internal predecessors, (80), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-14 17:07:06,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2021-12-14 17:07:06,467 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 73 [2021-12-14 17:07:06,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:06,468 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2021-12-14 17:07:06,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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) [2021-12-14 17:07:06,468 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2021-12-14 17:07:06,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-14 17:07:06,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:06,473 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-14 17:07:06,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 17:07:06,473 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:06,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:06,474 INFO L85 PathProgramCache]: Analyzing trace with hash 2140518273, now seen corresponding path program 1 times [2021-12-14 17:07:06,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:06,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96892948] [2021-12-14 17:07:06,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:06,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 17:07:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:07:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:07:06,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:07:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:07:06,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:07:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-14 17:07:06,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:06,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96892948] [2021-12-14 17:07:06,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96892948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:06,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:07:06,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 17:07:06,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400306956] [2021-12-14 17:07:06,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:06,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:07:06,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:06,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:07:06,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:07:06,672 INFO L87 Difference]: Start difference. First operand 101 states and 135 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 17:07:06,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:06,728 INFO L93 Difference]: Finished difference Result 192 states and 263 transitions. [2021-12-14 17:07:06,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:07:06,728 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2021-12-14 17:07:06,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:06,729 INFO L225 Difference]: With dead ends: 192 [2021-12-14 17:07:06,729 INFO L226 Difference]: Without dead ends: 105 [2021-12-14 17:07:06,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:07:06,730 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 22 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:06,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 571 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:07:06,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-14 17:07:06,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-12-14 17:07:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 69 states have internal predecessors, (83), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-14 17:07:06,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 138 transitions. [2021-12-14 17:07:06,737 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 138 transitions. Word has length 73 [2021-12-14 17:07:06,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:06,737 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 138 transitions. [2021-12-14 17:07:06,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 17:07:06,738 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 138 transitions. [2021-12-14 17:07:06,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-14 17:07:06,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:06,739 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-14 17:07:06,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 17:07:06,739 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:06,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:06,740 INFO L85 PathProgramCache]: Analyzing trace with hash 2124999555, now seen corresponding path program 1 times [2021-12-14 17:07:06,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:06,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506377976] [2021-12-14 17:07:06,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:06,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 17:07:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:07:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:07:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:07:06,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:07:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:07:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-14 17:07:06,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:06,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506377976] [2021-12-14 17:07:06,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506377976] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:06,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:07:06,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 17:07:06,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102136259] [2021-12-14 17:07:06,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:06,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:07:06,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:06,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:07:06,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:07:06,914 INFO L87 Difference]: Start difference. First operand 104 states and 138 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 17:07:06,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:06,969 INFO L93 Difference]: Finished difference Result 201 states and 268 transitions. [2021-12-14 17:07:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:07:06,969 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2021-12-14 17:07:06,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:06,971 INFO L225 Difference]: With dead ends: 201 [2021-12-14 17:07:06,971 INFO L226 Difference]: Without dead ends: 102 [2021-12-14 17:07:06,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:07:06,974 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 28 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:06,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 570 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:07:06,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-14 17:07:06,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-12-14 17:07:06,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 67 states have internal predecessors, (80), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-14 17:07:06,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 135 transitions. [2021-12-14 17:07:06,993 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 135 transitions. Word has length 73 [2021-12-14 17:07:06,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:06,994 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 135 transitions. [2021-12-14 17:07:06,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 17:07:06,994 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 135 transitions. [2021-12-14 17:07:06,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-14 17:07:06,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:06,995 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-14 17:07:06,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 17:07:06,996 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:06,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:06,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1956548997, now seen corresponding path program 1 times [2021-12-14 17:07:06,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:06,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508953070] [2021-12-14 17:07:06,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:06,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:07,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:07,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:07,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:07,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 17:07:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:07,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:07:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:07,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:07:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:07,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:07:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:07,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:07:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:07,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:07:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-14 17:07:07,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:07,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508953070] [2021-12-14 17:07:07,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508953070] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:07,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113411274] [2021-12-14 17:07:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:07,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:07,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:07,215 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) [2021-12-14 17:07:07,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 17:07:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:07,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-14 17:07:07,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 17:07:07,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:07:07,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113411274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:07,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:07:07,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 11 [2021-12-14 17:07:07,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602787741] [2021-12-14 17:07:07,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:07,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:07:07,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:07,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:07:07,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:07:07,657 INFO L87 Difference]: Start difference. First operand 102 states and 135 transitions. Second operand has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-14 17:07:07,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:07,851 INFO L93 Difference]: Finished difference Result 194 states and 259 transitions. [2021-12-14 17:07:07,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 17:07:07,852 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 73 [2021-12-14 17:07:07,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:07,854 INFO L225 Difference]: With dead ends: 194 [2021-12-14 17:07:07,854 INFO L226 Difference]: Without dead ends: 106 [2021-12-14 17:07:07,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-12-14 17:07:07,855 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 130 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:07,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 713 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:07:07,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-14 17:07:07,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-12-14 17:07:07,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 67 states have (on average 1.208955223880597) internal successors, (81), 69 states have internal predecessors, (81), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-12-14 17:07:07,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 138 transitions. [2021-12-14 17:07:07,868 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 138 transitions. Word has length 73 [2021-12-14 17:07:07,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:07,868 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 138 transitions. [2021-12-14 17:07:07,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-14 17:07:07,869 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 138 transitions. [2021-12-14 17:07:07,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-14 17:07:07,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:07,870 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-14 17:07:07,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 17:07:08,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:08,084 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:08,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:08,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1237560575, now seen corresponding path program 1 times [2021-12-14 17:07:08,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:08,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570105529] [2021-12-14 17:07:08,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:08,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:07:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 17:07:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:07:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 17:07:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:07:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-14 17:07:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-14 17:07:08,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:08,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570105529] [2021-12-14 17:07:08,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570105529] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:08,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:07:08,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 17:07:08,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226113726] [2021-12-14 17:07:08,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:08,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:07:08,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:08,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:07:08,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:07:08,260 INFO L87 Difference]: Start difference. First operand 104 states and 138 transitions. Second operand has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 17:07:08,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:08,343 INFO L93 Difference]: Finished difference Result 194 states and 262 transitions. [2021-12-14 17:07:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:07:08,344 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 75 [2021-12-14 17:07:08,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:08,345 INFO L225 Difference]: With dead ends: 194 [2021-12-14 17:07:08,345 INFO L226 Difference]: Without dead ends: 104 [2021-12-14 17:07:08,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:07:08,346 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 65 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:08,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 527 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:07:08,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-14 17:07:08,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-12-14 17:07:08,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 69 states have internal predecessors, (80), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-12-14 17:07:08,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 137 transitions. [2021-12-14 17:07:08,352 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 137 transitions. Word has length 75 [2021-12-14 17:07:08,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:08,352 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 137 transitions. [2021-12-14 17:07:08,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 17:07:08,353 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 137 transitions. [2021-12-14 17:07:08,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 17:07:08,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:08,356 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-14 17:07:08,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 17:07:08,357 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:08,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:08,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1187141198, now seen corresponding path program 1 times [2021-12-14 17:07:08,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:08,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870197039] [2021-12-14 17:07:08,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:08,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:07:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:07:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:07:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:07:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:07:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:07:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-14 17:07:08,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:08,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870197039] [2021-12-14 17:07:08,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870197039] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:08,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:07:08,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:07:08,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56503980] [2021-12-14 17:07:08,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:08,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:07:08,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:08,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:07:08,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:07:08,482 INFO L87 Difference]: Start difference. First operand 104 states and 137 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 17:07:08,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:08,523 INFO L93 Difference]: Finished difference Result 199 states and 268 transitions. [2021-12-14 17:07:08,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:07:08,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 77 [2021-12-14 17:07:08,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:08,526 INFO L225 Difference]: With dead ends: 199 [2021-12-14 17:07:08,526 INFO L226 Difference]: Without dead ends: 109 [2021-12-14 17:07:08,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:07:08,528 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 26 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:08,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 441 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:07:08,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-14 17:07:08,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-12-14 17:07:08,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 70 states have internal predecessors, (81), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-12-14 17:07:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2021-12-14 17:07:08,536 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 77 [2021-12-14 17:07:08,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:08,537 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 138 transitions. [2021-12-14 17:07:08,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 17:07:08,537 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 138 transitions. [2021-12-14 17:07:08,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-14 17:07:08,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:08,538 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:08,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 17:07:08,538 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:08,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:08,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1548809988, now seen corresponding path program 1 times [2021-12-14 17:07:08,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:08,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139806917] [2021-12-14 17:07:08,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:08,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:08,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:07:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:07:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:07:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 17:07:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:07:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 17:07:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-14 17:07:08,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:08,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139806917] [2021-12-14 17:07:08,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139806917] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:08,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:07:08,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:07:08,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893360683] [2021-12-14 17:07:08,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:08,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:07:08,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:08,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:07:08,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:07:08,691 INFO L87 Difference]: Start difference. First operand 105 states and 138 transitions. Second operand has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 17:07:08,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:08,728 INFO L93 Difference]: Finished difference Result 202 states and 273 transitions. [2021-12-14 17:07:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:07:08,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 78 [2021-12-14 17:07:08,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:08,731 INFO L225 Difference]: With dead ends: 202 [2021-12-14 17:07:08,731 INFO L226 Difference]: Without dead ends: 111 [2021-12-14 17:07:08,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:07:08,732 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 23 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:08,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 449 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:07:08,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-14 17:07:08,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2021-12-14 17:07:08,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 71 states have internal predecessors, (82), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-12-14 17:07:08,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2021-12-14 17:07:08,757 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 139 transitions. Word has length 78 [2021-12-14 17:07:08,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:08,758 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 139 transitions. [2021-12-14 17:07:08,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 17:07:08,758 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 139 transitions. [2021-12-14 17:07:08,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-14 17:07:08,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:08,759 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:08,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 17:07:08,759 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:08,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:08,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1185344546, now seen corresponding path program 1 times [2021-12-14 17:07:08,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:08,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681569971] [2021-12-14 17:07:08,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:08,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:07:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 17:07:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 17:07:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 17:07:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:07:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-14 17:07:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-14 17:07:08,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:08,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681569971] [2021-12-14 17:07:08,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681569971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:08,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429637495] [2021-12-14 17:07:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:08,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:08,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:08,908 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) [2021-12-14 17:07:08,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 17:07:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:09,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-14 17:07:09,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 17:07:09,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:07:09,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429637495] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:09,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:07:09,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 12 [2021-12-14 17:07:09,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759063883] [2021-12-14 17:07:09,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:09,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 17:07:09,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:09,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 17:07:09,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-14 17:07:09,311 INFO L87 Difference]: Start difference. First operand 106 states and 139 transitions. Second operand has 10 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 17:07:09,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:09,499 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2021-12-14 17:07:09,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 17:07:09,500 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 86 [2021-12-14 17:07:09,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:09,503 INFO L225 Difference]: With dead ends: 203 [2021-12-14 17:07:09,503 INFO L226 Difference]: Without dead ends: 111 [2021-12-14 17:07:09,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-12-14 17:07:09,505 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 132 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:09,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 709 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:07:09,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-14 17:07:09,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-12-14 17:07:09,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 72 states have internal predecessors, (83), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-12-14 17:07:09,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 140 transitions. [2021-12-14 17:07:09,513 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 140 transitions. Word has length 86 [2021-12-14 17:07:09,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:09,514 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 140 transitions. [2021-12-14 17:07:09,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 17:07:09,514 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 140 transitions. [2021-12-14 17:07:09,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-14 17:07:09,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:09,515 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-14 17:07:09,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 17:07:09,727 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,SelfDestructingSolverStorable8 [2021-12-14 17:07:09,727 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:09,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:09,728 INFO L85 PathProgramCache]: Analyzing trace with hash 172862485, now seen corresponding path program 1 times [2021-12-14 17:07:09,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:09,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497934411] [2021-12-14 17:07:09,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:09,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:09,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:09,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:09,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:09,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:09,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:07:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:09,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:07:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:09,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:07:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:09,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-14 17:07:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:09,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-14 17:07:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:09,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:07:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-14 17:07:09,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:09,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497934411] [2021-12-14 17:07:09,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497934411] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:09,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494683863] [2021-12-14 17:07:09,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:09,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:09,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:09,918 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) [2021-12-14 17:07:09,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 17:07:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:10,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-14 17:07:10,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:10,270 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:07:10,271 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 17:07:10,281 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:07:10,282 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 17:07:11,210 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|) 0))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|) 0)))) is different from true [2021-12-14 17:07:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-14 17:07:11,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:07:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-14 17:07:11,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494683863] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:07:11,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:07:11,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 8] total 19 [2021-12-14 17:07:11,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245950131] [2021-12-14 17:07:11,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:07:11,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 17:07:11,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:11,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 17:07:11,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=260, Unknown=1, NotChecked=32, Total=342 [2021-12-14 17:07:11,623 INFO L87 Difference]: Start difference. First operand 107 states and 140 transitions. Second operand has 19 states, 18 states have (on average 4.611111111111111) internal successors, (83), 19 states have internal predecessors, (83), 6 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2021-12-14 17:07:12,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:12,096 INFO L93 Difference]: Finished difference Result 239 states and 324 transitions. [2021-12-14 17:07:12,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 17:07:12,096 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.611111111111111) internal successors, (83), 19 states have internal predecessors, (83), 6 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) Word has length 88 [2021-12-14 17:07:12,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:12,097 INFO L225 Difference]: With dead ends: 239 [2021-12-14 17:07:12,097 INFO L226 Difference]: Without dead ends: 146 [2021-12-14 17:07:12,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=418, Unknown=1, NotChecked=42, Total=552 [2021-12-14 17:07:12,098 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 90 mSDsluCounter, 1432 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:12,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 1552 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 498 Invalid, 0 Unknown, 214 Unchecked, 0.3s Time] [2021-12-14 17:07:12,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-14 17:07:12,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 117. [2021-12-14 17:07:12,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 78 states have (on average 1.205128205128205) internal successors, (94), 80 states have internal predecessors, (94), 29 states have call successors, (29), 8 states have call predecessors, (29), 9 states have return successors, (31), 28 states have call predecessors, (31), 28 states have call successors, (31) [2021-12-14 17:07:12,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 154 transitions. [2021-12-14 17:07:12,104 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 154 transitions. Word has length 88 [2021-12-14 17:07:12,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:12,105 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 154 transitions. [2021-12-14 17:07:12,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.611111111111111) internal successors, (83), 19 states have internal predecessors, (83), 6 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2021-12-14 17:07:12,105 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 154 transitions. [2021-12-14 17:07:12,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-14 17:07:12,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:12,106 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:12,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 17:07:12,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:12,320 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:12,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:12,320 INFO L85 PathProgramCache]: Analyzing trace with hash 759251201, now seen corresponding path program 1 times [2021-12-14 17:07:12,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:12,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359605153] [2021-12-14 17:07:12,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:12,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:12,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:12,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:12,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:12,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:12,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:07:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:12,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:07:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:12,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:07:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:12,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:07:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:12,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:07:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:12,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:07:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-14 17:07:12,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:12,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359605153] [2021-12-14 17:07:12,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359605153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:12,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:07:12,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-14 17:07:12,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067427006] [2021-12-14 17:07:12,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:12,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 17:07:12,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:12,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 17:07:12,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-12-14 17:07:12,720 INFO L87 Difference]: Start difference. First operand 117 states and 154 transitions. Second operand has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 17:07:13,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:13,355 INFO L93 Difference]: Finished difference Result 173 states and 243 transitions. [2021-12-14 17:07:13,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 17:07:13,356 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 89 [2021-12-14 17:07:13,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:13,357 INFO L225 Difference]: With dead ends: 173 [2021-12-14 17:07:13,357 INFO L226 Difference]: Without dead ends: 171 [2021-12-14 17:07:13,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-12-14 17:07:13,358 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 56 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:13,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1384 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 17:07:13,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-14 17:07:13,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 152. [2021-12-14 17:07:13,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 99 states have internal predecessors, (112), 44 states have call successors, (44), 10 states have call predecessors, (44), 12 states have return successors, (53), 42 states have call predecessors, (53), 43 states have call successors, (53) [2021-12-14 17:07:13,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 209 transitions. [2021-12-14 17:07:13,369 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 209 transitions. Word has length 89 [2021-12-14 17:07:13,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:13,370 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 209 transitions. [2021-12-14 17:07:13,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 17:07:13,370 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 209 transitions. [2021-12-14 17:07:13,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 17:07:13,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:13,371 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:13,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 17:07:13,372 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:13,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:13,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1974343619, now seen corresponding path program 1 times [2021-12-14 17:07:13,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:13,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078181231] [2021-12-14 17:07:13,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:13,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:13,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:13,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:13,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:13,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 17:07:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:13,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:13,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:07:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:13,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:07:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:13,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:07:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:13,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:07:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:13,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:07:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:13,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:07:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-14 17:07:13,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:13,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078181231] [2021-12-14 17:07:13,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078181231] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:13,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049212896] [2021-12-14 17:07:13,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:13,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:13,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:13,668 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) [2021-12-14 17:07:13,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 17:07:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:13,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-14 17:07:13,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:14,083 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-14 17:07:14,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:07:14,087 INFO L388 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 14 treesize of output 16 [2021-12-14 17:07:14,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:07:14,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:07:14,148 INFO L388 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 22 treesize of output 19 [2021-12-14 17:07:14,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:07:14,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:07:14,154 INFO L388 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 14 treesize of output 14 [2021-12-14 17:07:14,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 14 treesize of output 18 [2021-12-14 17:07:14,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-14 17:07:14,642 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-14 17:07:14,642 INFO L388 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 12 [2021-12-14 17:07:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-14 17:07:14,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:07:15,042 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3364 (Array Int Int)) (v_ArrVal_3366 (Array Int Int)) (v_ArrVal_3369 Int)) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_3364) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_3366) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_3369)) |c_ULTIMATE.start_aws_linked_list_push_back_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_push_back_harness_~#list~0#1.offset|) (+ |c_ULTIMATE.start_aws_linked_list_push_back_harness_~#list~0#1.offset| 16)))) is different from false [2021-12-14 17:07:15,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:15,059 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2021-12-14 17:07:15,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:15,084 INFO L388 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 133 treesize of output 149 [2021-12-14 17:07:15,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 144 [2021-12-14 17:07:15,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 142 [2021-12-14 17:07:15,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-14 17:07:15,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:15,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 52 [2021-12-14 17:07:15,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-14 17:07:15,247 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-12-14 17:07:15,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-14 17:07:15,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-14 17:07:15,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:15,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-12-14 17:07:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 47 trivial. 1 not checked. [2021-12-14 17:07:15,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049212896] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:07:15,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:07:15,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 32 [2021-12-14 17:07:15,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194396787] [2021-12-14 17:07:15,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:07:15,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-14 17:07:15,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:15,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-14 17:07:15,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=838, Unknown=1, NotChecked=58, Total=992 [2021-12-14 17:07:15,393 INFO L87 Difference]: Start difference. First operand 152 states and 209 transitions. Second operand has 32 states, 29 states have (on average 4.0) internal successors, (116), 32 states have internal predecessors, (116), 9 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 9 states have call successors, (22) [2021-12-14 17:07:16,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:16,415 INFO L93 Difference]: Finished difference Result 344 states and 476 transitions. [2021-12-14 17:07:16,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 17:07:16,416 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 4.0) internal successors, (116), 32 states have internal predecessors, (116), 9 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 9 states have call successors, (22) Word has length 91 [2021-12-14 17:07:16,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:16,417 INFO L225 Difference]: With dead ends: 344 [2021-12-14 17:07:16,417 INFO L226 Difference]: Without dead ends: 221 [2021-12-14 17:07:16,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 182 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=223, Invalid=1586, Unknown=1, NotChecked=82, Total=1892 [2021-12-14 17:07:16,418 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 199 mSDsluCounter, 2551 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 2710 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:16,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 2710 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1012 Invalid, 0 Unknown, 333 Unchecked, 0.6s Time] [2021-12-14 17:07:16,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-14 17:07:16,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 183. [2021-12-14 17:07:16,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 122 states have (on average 1.1721311475409837) internal successors, (143), 126 states have internal predecessors, (143), 46 states have call successors, (46), 12 states have call predecessors, (46), 14 states have return successors, (55), 44 states have call predecessors, (55), 45 states have call successors, (55) [2021-12-14 17:07:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 244 transitions. [2021-12-14 17:07:16,429 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 244 transitions. Word has length 91 [2021-12-14 17:07:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:16,429 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 244 transitions. [2021-12-14 17:07:16,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 4.0) internal successors, (116), 32 states have internal predecessors, (116), 9 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 9 states have call successors, (22) [2021-12-14 17:07:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 244 transitions. [2021-12-14 17:07:16,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-14 17:07:16,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:16,431 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:16,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 17:07:16,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:16,644 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:16,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:16,644 INFO L85 PathProgramCache]: Analyzing trace with hash -50095425, now seen corresponding path program 1 times [2021-12-14 17:07:16,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:16,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25817785] [2021-12-14 17:07:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:16,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:16,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:16,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:16,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:16,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:16,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:07:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:16,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:07:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:16,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:07:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:16,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:07:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:16,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:07:16,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:16,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:07:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:16,884 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-14 17:07:16,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:16,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25817785] [2021-12-14 17:07:16,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25817785] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:16,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:07:16,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-14 17:07:16,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892183695] [2021-12-14 17:07:16,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:16,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 17:07:16,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:16,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 17:07:16,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:07:16,887 INFO L87 Difference]: Start difference. First operand 183 states and 244 transitions. Second operand has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 17:07:17,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:17,120 INFO L93 Difference]: Finished difference Result 292 states and 397 transitions. [2021-12-14 17:07:17,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 17:07:17,121 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 89 [2021-12-14 17:07:17,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:17,122 INFO L225 Difference]: With dead ends: 292 [2021-12-14 17:07:17,122 INFO L226 Difference]: Without dead ends: 189 [2021-12-14 17:07:17,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-14 17:07:17,123 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 54 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:17,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 872 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:07:17,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-12-14 17:07:17,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2021-12-14 17:07:17,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 126 states have (on average 1.1746031746031746) internal successors, (148), 131 states have internal predecessors, (148), 46 states have call successors, (46), 12 states have call predecessors, (46), 15 states have return successors, (60), 44 states have call predecessors, (60), 45 states have call successors, (60) [2021-12-14 17:07:17,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 254 transitions. [2021-12-14 17:07:17,133 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 254 transitions. Word has length 89 [2021-12-14 17:07:17,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:17,134 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 254 transitions. [2021-12-14 17:07:17,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 17:07:17,134 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 254 transitions. [2021-12-14 17:07:17,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-14 17:07:17,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:17,135 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-14 17:07:17,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 17:07:17,135 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:17,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:17,136 INFO L85 PathProgramCache]: Analyzing trace with hash -443122435, now seen corresponding path program 1 times [2021-12-14 17:07:17,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:17,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901993427] [2021-12-14 17:07:17,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:17,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:07:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:07:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:07:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:07:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:07:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:07:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-14 17:07:17,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:17,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901993427] [2021-12-14 17:07:17,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901993427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:17,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:07:17,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 17:07:17,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641460885] [2021-12-14 17:07:17,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:17,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:07:17,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:17,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:07:17,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:07:17,300 INFO L87 Difference]: Start difference. First operand 188 states and 254 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-14 17:07:17,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:17,400 INFO L93 Difference]: Finished difference Result 317 states and 435 transitions. [2021-12-14 17:07:17,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:07:17,401 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 89 [2021-12-14 17:07:17,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:17,402 INFO L225 Difference]: With dead ends: 317 [2021-12-14 17:07:17,402 INFO L226 Difference]: Without dead ends: 190 [2021-12-14 17:07:17,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:07:17,403 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 37 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:17,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 775 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:07:17,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-12-14 17:07:17,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2021-12-14 17:07:17,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 126 states have (on average 1.1746031746031746) internal successors, (148), 131 states have internal predecessors, (148), 45 states have call successors, (45), 12 states have call predecessors, (45), 15 states have return successors, (55), 43 states have call predecessors, (55), 44 states have call successors, (55) [2021-12-14 17:07:17,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 248 transitions. [2021-12-14 17:07:17,412 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 248 transitions. Word has length 89 [2021-12-14 17:07:17,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:17,412 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 248 transitions. [2021-12-14 17:07:17,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-14 17:07:17,413 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 248 transitions. [2021-12-14 17:07:17,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 17:07:17,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:17,414 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:17,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 17:07:17,414 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:17,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:17,414 INFO L85 PathProgramCache]: Analyzing trace with hash -2140919276, now seen corresponding path program 1 times [2021-12-14 17:07:17,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:17,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918702413] [2021-12-14 17:07:17,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:17,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:17,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 17:07:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:07:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:07:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 17:07:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 17:07:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:07:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 17:07:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-14 17:07:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-14 17:07:17,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:17,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918702413] [2021-12-14 17:07:17,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918702413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:17,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:07:17,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 17:07:17,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743879454] [2021-12-14 17:07:17,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:17,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:07:17,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:17,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:07:17,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:07:17,600 INFO L87 Difference]: Start difference. First operand 187 states and 248 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 17:07:17,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:17,796 INFO L93 Difference]: Finished difference Result 356 states and 485 transitions. [2021-12-14 17:07:17,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:07:17,796 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2021-12-14 17:07:17,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:17,797 INFO L225 Difference]: With dead ends: 356 [2021-12-14 17:07:17,797 INFO L226 Difference]: Without dead ends: 214 [2021-12-14 17:07:17,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-14 17:07:17,798 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 27 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:17,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 751 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:07:17,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-14 17:07:17,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 192. [2021-12-14 17:07:17,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 130 states have (on average 1.1692307692307693) internal successors, (152), 135 states have internal predecessors, (152), 45 states have call successors, (45), 12 states have call predecessors, (45), 16 states have return successors, (61), 44 states have call predecessors, (61), 44 states have call successors, (61) [2021-12-14 17:07:17,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 258 transitions. [2021-12-14 17:07:17,808 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 258 transitions. Word has length 101 [2021-12-14 17:07:17,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:17,808 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 258 transitions. [2021-12-14 17:07:17,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 17:07:17,808 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 258 transitions. [2021-12-14 17:07:17,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 17:07:17,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:17,809 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:17,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 17:07:17,810 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:17,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:17,810 INFO L85 PathProgramCache]: Analyzing trace with hash -754133866, now seen corresponding path program 1 times [2021-12-14 17:07:17,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:17,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907154470] [2021-12-14 17:07:17,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:17,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 17:07:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:07:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:07:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 17:07:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 17:07:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:07:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 17:07:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-14 17:07:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-14 17:07:17,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:17,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907154470] [2021-12-14 17:07:17,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907154470] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:17,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259087137] [2021-12-14 17:07:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:17,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:17,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:17,977 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) [2021-12-14 17:07:18,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 17:07:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:18,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 17:07:18,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-14 17:07:18,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:07:18,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259087137] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:18,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:07:18,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-12-14 17:07:18,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598624833] [2021-12-14 17:07:18,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:18,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:07:18,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:18,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:07:18,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:07:18,518 INFO L87 Difference]: Start difference. First operand 192 states and 258 transitions. Second operand has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-14 17:07:18,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:18,637 INFO L93 Difference]: Finished difference Result 348 states and 478 transitions. [2021-12-14 17:07:18,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:07:18,638 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 101 [2021-12-14 17:07:18,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:18,639 INFO L225 Difference]: With dead ends: 348 [2021-12-14 17:07:18,639 INFO L226 Difference]: Without dead ends: 190 [2021-12-14 17:07:18,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-12-14 17:07:18,640 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 127 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:18,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 637 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:07:18,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-12-14 17:07:18,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2021-12-14 17:07:18,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 127 states have (on average 1.141732283464567) internal successors, (145), 133 states have internal predecessors, (145), 45 states have call successors, (45), 12 states have call predecessors, (45), 16 states have return successors, (60), 43 states have call predecessors, (60), 44 states have call successors, (60) [2021-12-14 17:07:18,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 250 transitions. [2021-12-14 17:07:18,649 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 250 transitions. Word has length 101 [2021-12-14 17:07:18,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:18,650 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 250 transitions. [2021-12-14 17:07:18,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-14 17:07:18,650 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 250 transitions. [2021-12-14 17:07:18,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-14 17:07:18,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:18,651 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:18,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 17:07:18,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-14 17:07:18,870 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:18,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:18,870 INFO L85 PathProgramCache]: Analyzing trace with hash -270009515, now seen corresponding path program 1 times [2021-12-14 17:07:18,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:18,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474920305] [2021-12-14 17:07:18,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:18,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:19,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:19,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:19,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:19,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:19,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:07:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:19,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:07:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:19,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:07:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:19,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:07:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:19,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:07:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:19,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:07:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:19,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:07:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:19,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 17:07:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-14 17:07:19,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:19,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474920305] [2021-12-14 17:07:19,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474920305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:19,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:07:19,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-14 17:07:19,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561034652] [2021-12-14 17:07:19,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:19,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 17:07:19,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:19,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 17:07:19,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-12-14 17:07:19,409 INFO L87 Difference]: Start difference. First operand 189 states and 250 transitions. Second operand has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-14 17:07:20,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:20,099 INFO L93 Difference]: Finished difference Result 218 states and 297 transitions. [2021-12-14 17:07:20,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 17:07:20,100 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 103 [2021-12-14 17:07:20,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:20,101 INFO L225 Difference]: With dead ends: 218 [2021-12-14 17:07:20,101 INFO L226 Difference]: Without dead ends: 216 [2021-12-14 17:07:20,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-12-14 17:07:20,102 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 46 mSDsluCounter, 1465 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1598 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:20,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 1598 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 17:07:20,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-14 17:07:20,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 197. [2021-12-14 17:07:20,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 132 states have (on average 1.1363636363636365) internal successors, (150), 139 states have internal predecessors, (150), 46 states have call successors, (46), 13 states have call predecessors, (46), 18 states have return successors, (64), 44 states have call predecessors, (64), 45 states have call successors, (64) [2021-12-14 17:07:20,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 260 transitions. [2021-12-14 17:07:20,114 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 260 transitions. Word has length 103 [2021-12-14 17:07:20,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:20,114 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 260 transitions. [2021-12-14 17:07:20,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-14 17:07:20,114 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 260 transitions. [2021-12-14 17:07:20,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-14 17:07:20,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:20,116 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:20,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 17:07:20,116 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:20,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:20,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1079356141, now seen corresponding path program 1 times [2021-12-14 17:07:20,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:20,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438132051] [2021-12-14 17:07:20,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:20,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:20,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:20,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:20,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:20,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:20,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:07:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:20,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:07:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:20,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:07:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:20,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:07:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:20,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:07:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:20,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:07:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:20,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:07:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:20,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 17:07:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-14 17:07:20,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:20,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438132051] [2021-12-14 17:07:20,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438132051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:20,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:07:20,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 17:07:20,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531227996] [2021-12-14 17:07:20,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:20,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 17:07:20,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:20,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 17:07:20,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:07:20,514 INFO L87 Difference]: Start difference. First operand 197 states and 260 transitions. Second operand has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-14 17:07:21,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:21,051 INFO L93 Difference]: Finished difference Result 334 states and 448 transitions. [2021-12-14 17:07:21,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 17:07:21,051 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 103 [2021-12-14 17:07:21,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:21,053 INFO L225 Difference]: With dead ends: 334 [2021-12-14 17:07:21,053 INFO L226 Difference]: Without dead ends: 215 [2021-12-14 17:07:21,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-12-14 17:07:21,054 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 51 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:21,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 1212 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 17:07:21,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-12-14 17:07:21,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 197. [2021-12-14 17:07:21,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 132 states have (on average 1.1363636363636365) internal successors, (150), 139 states have internal predecessors, (150), 46 states have call successors, (46), 13 states have call predecessors, (46), 18 states have return successors, (62), 44 states have call predecessors, (62), 45 states have call successors, (62) [2021-12-14 17:07:21,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 258 transitions. [2021-12-14 17:07:21,063 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 258 transitions. Word has length 103 [2021-12-14 17:07:21,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:21,064 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 258 transitions. [2021-12-14 17:07:21,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-14 17:07:21,064 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 258 transitions. [2021-12-14 17:07:21,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-14 17:07:21,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:21,065 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:21,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 17:07:21,065 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:21,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:21,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1472383151, now seen corresponding path program 1 times [2021-12-14 17:07:21,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:21,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769158312] [2021-12-14 17:07:21,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:21,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:07:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:07:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:07:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:07:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:07:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:07:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:07:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 17:07:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,220 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-14 17:07:21,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:21,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769158312] [2021-12-14 17:07:21,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769158312] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:21,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:07:21,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 17:07:21,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319491570] [2021-12-14 17:07:21,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:21,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:07:21,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:21,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:07:21,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:07:21,223 INFO L87 Difference]: Start difference. First operand 197 states and 258 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-14 17:07:21,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:21,305 INFO L93 Difference]: Finished difference Result 308 states and 402 transitions. [2021-12-14 17:07:21,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:07:21,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 103 [2021-12-14 17:07:21,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:21,307 INFO L225 Difference]: With dead ends: 308 [2021-12-14 17:07:21,307 INFO L226 Difference]: Without dead ends: 188 [2021-12-14 17:07:21,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:07:21,308 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 36 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:21,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 778 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:07:21,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-14 17:07:21,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-12-14 17:07:21,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 126 states have (on average 1.126984126984127) internal successors, (142), 131 states have internal predecessors, (142), 45 states have call successors, (45), 13 states have call predecessors, (45), 16 states have return successors, (55), 43 states have call predecessors, (55), 44 states have call successors, (55) [2021-12-14 17:07:21,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 242 transitions. [2021-12-14 17:07:21,317 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 242 transitions. Word has length 103 [2021-12-14 17:07:21,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:21,317 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 242 transitions. [2021-12-14 17:07:21,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-14 17:07:21,317 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 242 transitions. [2021-12-14 17:07:21,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-14 17:07:21,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:21,318 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:21,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 17:07:21,318 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:21,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:21,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2046460642, now seen corresponding path program 2 times [2021-12-14 17:07:21,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:21,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328344987] [2021-12-14 17:07:21,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:21,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 17:07:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:07:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:07:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-14 17:07:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-14 17:07:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:07:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 17:07:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-14 17:07:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:21,719 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-14 17:07:21,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:21,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328344987] [2021-12-14 17:07:21,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328344987] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:21,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089516413] [2021-12-14 17:07:21,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 17:07:21,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:21,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:21,721 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) [2021-12-14 17:07:21,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 17:07:22,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 17:07:22,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 17:07:22,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-14 17:07:22,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:22,226 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 17:07:22,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-12-14 17:07:22,429 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 17:07:22,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 17:07:22,497 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-12-14 17:07:22,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 55 [2021-12-14 17:07:22,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2021-12-14 17:07:22,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 15 [2021-12-14 17:07:22,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 9 [2021-12-14 17:07:22,543 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-14 17:07:22,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 46 [2021-12-14 17:07:22,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-12-14 17:07:22,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:07:22,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 95 [2021-12-14 17:07:22,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:07:22,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 133 [2021-12-14 17:07:22,837 INFO L354 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2021-12-14 17:07:22,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 148 treesize of output 151 [2021-12-14 17:07:22,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 17:07:22,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 88 [2021-12-14 17:07:22,866 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-12-14 17:07:22,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 90 [2021-12-14 17:07:22,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 31 [2021-12-14 17:07:22,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 27 [2021-12-14 17:07:22,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-12-14 17:07:22,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-12-14 17:07:22,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-14 17:07:22,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2021-12-14 17:07:22,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-14 17:07:22,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 29 [2021-12-14 17:07:22,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-14 17:07:23,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 35 [2021-12-14 17:07:23,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 17:07:23,080 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-14 17:07:23,080 INFO L388 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 60 [2021-12-14 17:07:23,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2021-12-14 17:07:23,489 INFO L354 Elim1Store]: treesize reduction 8, result has 71.4 percent of original size [2021-12-14 17:07:23,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 133 treesize of output 94 [2021-12-14 17:07:23,503 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-12-14 17:07:23,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 61 treesize of output 35 [2021-12-14 17:07:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-14 17:07:23,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:07:23,913 INFO L354 Elim1Store]: treesize reduction 44, result has 60.4 percent of original size [2021-12-14 17:07:23,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 470 treesize of output 388 [2021-12-14 17:07:23,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:23,928 INFO L388 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 815 treesize of output 807 [2021-12-14 17:07:23,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 866 treesize of output 838 [2021-12-14 17:07:23,972 INFO L354 Elim1Store]: treesize reduction 12, result has 64.7 percent of original size [2021-12-14 17:07:23,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 458 treesize of output 467 [2021-12-14 17:07:23,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:23,996 INFO L388 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 1291 treesize of output 1283 [2021-12-14 17:07:24,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1322 treesize of output 1298 [2021-12-14 17:07:24,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:24,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 658 treesize of output 654 [2021-12-14 17:07:24,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1386 treesize of output 1370 [2021-12-14 17:07:24,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:24,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 258 treesize of output 255 [2021-12-14 17:07:24,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 298 [2021-12-14 17:07:24,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 298 treesize of output 290 [2021-12-14 17:07:24,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-14 17:07:24,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-14 17:07:24,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089516413] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:24,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 17:07:24,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-12-14 17:07:24,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976330667] [2021-12-14 17:07:24,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 17:07:24,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-14 17:07:24,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:24,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-14 17:07:24,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 17:07:24,906 INFO L87 Difference]: Start difference. First operand 188 states and 242 transitions. Second operand has 28 states, 25 states have (on average 3.24) internal successors, (81), 23 states have internal predecessors, (81), 10 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2021-12-14 17:07:25,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:25,672 INFO L93 Difference]: Finished difference Result 208 states and 259 transitions. [2021-12-14 17:07:25,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-14 17:07:25,673 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 3.24) internal successors, (81), 23 states have internal predecessors, (81), 10 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) Word has length 102 [2021-12-14 17:07:25,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:25,674 INFO L225 Difference]: With dead ends: 208 [2021-12-14 17:07:25,674 INFO L226 Difference]: Without dead ends: 203 [2021-12-14 17:07:25,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 190 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=228, Invalid=2222, Unknown=0, NotChecked=0, Total=2450 [2021-12-14 17:07:25,675 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 74 mSDsluCounter, 1576 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1688 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:25,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 1688 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 441 Invalid, 0 Unknown, 169 Unchecked, 0.3s Time] [2021-12-14 17:07:25,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-14 17:07:25,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2021-12-14 17:07:25,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 138 states have (on average 1.1159420289855073) internal successors, (154), 143 states have internal predecessors, (154), 45 states have call successors, (45), 16 states have call predecessors, (45), 19 states have return successors, (55), 43 states have call predecessors, (55), 44 states have call successors, (55) [2021-12-14 17:07:25,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 254 transitions. [2021-12-14 17:07:25,711 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 254 transitions. Word has length 102 [2021-12-14 17:07:25,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:25,711 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 254 transitions. [2021-12-14 17:07:25,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 3.24) internal successors, (81), 23 states have internal predecessors, (81), 10 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2021-12-14 17:07:25,712 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 254 transitions. [2021-12-14 17:07:25,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-14 17:07:25,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:25,713 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:25,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 17:07:25,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:25,933 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:25,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:25,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1303128156, now seen corresponding path program 1 times [2021-12-14 17:07:25,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:25,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930503747] [2021-12-14 17:07:25,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:25,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:26,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:26,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:26,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:26,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:26,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:26,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:26,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:07:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:26,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:07:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:26,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:07:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:26,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:07:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:26,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:07:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:26,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:07:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:26,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:07:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:26,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 17:07:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:26,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:07:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:26,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 17:07:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-14 17:07:26,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:26,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930503747] [2021-12-14 17:07:26,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930503747] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:26,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133713563] [2021-12-14 17:07:26,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:26,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:26,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:26,530 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) [2021-12-14 17:07:26,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 17:07:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:26,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-14 17:07:26,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:27,387 INFO L354 Elim1Store]: treesize reduction 294, result has 35.7 percent of original size [2021-12-14 17:07:27,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 6 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 819 treesize of output 716 [2021-12-14 17:07:27,525 INFO L354 Elim1Store]: treesize reduction 330, result has 37.6 percent of original size [2021-12-14 17:07:27,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 6 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 558 treesize of output 521 [2021-12-14 17:07:27,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 805 treesize of output 673 [2021-12-14 17:07:27,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 198 [2021-12-14 17:07:27,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 300 treesize of output 276 [2021-12-14 17:07:27,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 64 [2021-12-14 17:07:27,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 64 [2021-12-14 17:07:27,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-14 17:07:27,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-14 17:07:27,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-14 17:07:27,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-14 17:07:27,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-14 17:07:29,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:29,427 INFO L388 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 29 treesize of output 47 [2021-12-14 17:07:35,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:35,078 INFO L388 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 38 treesize of output 54 [2021-12-14 17:07:35,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:35,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-12-14 17:07:35,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-14 17:07:35,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:35,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-12-14 17:07:35,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-14 17:07:35,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 17:07:35,623 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-14 17:07:35,819 INFO L388 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 9 treesize of output 3 [2021-12-14 17:07:35,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-12-14 17:07:35,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-14 17:07:35,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-12-14 17:07:35,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-14 17:07:36,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:36,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-12-14 17:07:36,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-12-14 17:07:36,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:36,824 INFO L388 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 26 treesize of output 28 [2021-12-14 17:07:37,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2021-12-14 17:07:37,833 INFO L388 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 17 treesize of output 13 [2021-12-14 17:07:37,870 INFO L388 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 17 treesize of output 13 [2021-12-14 17:07:37,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 54 [2021-12-14 17:07:38,035 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-14 17:07:38,035 INFO L388 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 22 treesize of output 16 [2021-12-14 17:07:38,168 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-14 17:07:38,168 INFO L388 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 22 treesize of output 16 [2021-12-14 17:07:38,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:38,482 INFO L388 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 205 treesize of output 207 [2021-12-14 17:07:38,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-14 17:07:39,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-14 17:07:40,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-14 17:07:40,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-14 17:07:41,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:41,470 INFO L388 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 107 treesize of output 107 [2021-12-14 17:07:41,578 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-14 17:07:41,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:41,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 111 [2021-12-14 17:07:41,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-14 17:07:42,226 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-12-14 17:07:42,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 65 [2021-12-14 17:07:42,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-14 17:07:42,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-14 17:07:42,438 INFO L388 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 9 treesize of output 3 [2021-12-14 17:07:42,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:07:42,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-12-14 17:07:42,467 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-14 17:07:42,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:42,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2021-12-14 17:07:42,525 INFO L388 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 9 treesize of output 3 [2021-12-14 17:07:43,740 INFO L354 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2021-12-14 17:07:43,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 221 treesize of output 130 [2021-12-14 17:07:43,759 INFO L354 Elim1Store]: treesize reduction 110, result has 2.7 percent of original size [2021-12-14 17:07:43,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 43 [2021-12-14 17:07:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 17:07:43,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:07:58,554 WARN L227 SmtUtils]: Spent 10.19s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)