./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fcb8e130 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_begin_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 b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-fcb8e13 [2021-11-22 20:16:11,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 20:16:11,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 20:16:11,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 20:16:11,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 20:16:11,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 20:16:11,702 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 20:16:11,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 20:16:11,706 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 20:16:11,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 20:16:11,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 20:16:11,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 20:16:11,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 20:16:11,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 20:16:11,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 20:16:11,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 20:16:11,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 20:16:11,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 20:16:11,722 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 20:16:11,727 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 20:16:11,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 20:16:11,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 20:16:11,733 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 20:16:11,734 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 20:16:11,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 20:16:11,740 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 20:16:11,740 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 20:16:11,741 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 20:16:11,742 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 20:16:11,742 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 20:16:11,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 20:16:11,744 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 20:16:11,745 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 20:16:11,746 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 20:16:11,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 20:16:11,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 20:16:11,747 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 20:16:11,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 20:16:11,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 20:16:11,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 20:16:11,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 20:16:11,750 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-22 20:16:11,778 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 20:16:11,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 20:16:11,779 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 20:16:11,779 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 20:16:11,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 20:16:11,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 20:16:11,781 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 20:16:11,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 20:16:11,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 20:16:11,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 20:16:11,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 20:16:11,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 20:16:11,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 20:16:11,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 20:16:11,783 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 20:16:11,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 20:16:11,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 20:16:11,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 20:16:11,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 20:16:11,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 20:16:11,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 20:16:11,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 20:16:11,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 20:16:11,784 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 20:16:11,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 20:16:11,785 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 20:16:11,785 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 20:16:11,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 20:16:11,786 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 20:16:11,786 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b [2021-11-22 20:16:12,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 20:16:12,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 20:16:12,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 20:16:12,049 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 20:16:12,050 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 20:16:12,051 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2021-11-22 20:16:12,113 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6491c958/5f164ed2a9e841e88249d7a6e5744170/FLAG624b066aa [2021-11-22 20:16:12,711 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 20:16:12,712 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2021-11-22 20:16:12,741 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6491c958/5f164ed2a9e841e88249d7a6e5744170/FLAG624b066aa [2021-11-22 20:16:12,885 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6491c958/5f164ed2a9e841e88249d7a6e5744170 [2021-11-22 20:16:12,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 20:16:12,890 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 20:16:12,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 20:16:12,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 20:16:12,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 20:16:12,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 08:16:12" (1/1) ... [2021-11-22 20:16:12,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17f2a070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:16:12, skipping insertion in model container [2021-11-22 20:16:12,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 08:16:12" (1/1) ... [2021-11-22 20:16:12,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 20:16:12,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 20:16:13,187 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_begin_harness.i[4495,4508] [2021-11-22 20:16:13,192 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_begin_harness.i[4555,4568] [2021-11-22 20:16:13,710 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:13,711 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:13,712 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:13,713 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:13,714 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:13,724 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:13,724 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:13,725 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:13,726 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:13,728 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:13,728 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:13,729 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:13,729 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:13,945 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-22 20:16:13,948 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-22 20:16:13,949 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-22 20:16:13,950 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-22 20:16:13,951 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-22 20:16:13,951 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-22 20:16:13,952 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-22 20:16:13,952 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-22 20:16:13,953 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-22 20:16:13,953 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-22 20:16:14,054 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-22 20:16:14,091 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 20:16:14,112 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 20:16:14,132 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_begin_harness.i[4495,4508] [2021-11-22 20:16:14,133 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_begin_harness.i[4555,4568] [2021-11-22 20:16:14,175 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:14,191 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:14,191 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:14,191 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:14,192 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:14,197 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:14,197 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:14,198 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:14,198 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:14,199 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:14,199 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:14,200 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:14,200 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:16:14,225 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-22 20:16:14,226 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-22 20:16:14,227 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-22 20:16:14,227 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-22 20:16:14,228 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-22 20:16:14,228 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-22 20:16:14,229 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-22 20:16:14,229 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-22 20:16:14,229 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-22 20:16:14,230 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-22 20:16:14,245 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-22 20:16:14,263 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 20:16:14,403 INFO L208 MainTranslator]: Completed translation [2021-11-22 20:16:14,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:16:14 WrapperNode [2021-11-22 20:16:14,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 20:16:14,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 20:16:14,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 20:16:14,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 20:16:14,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:16:14" (1/1) ... [2021-11-22 20:16:14,499 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:16:14" (1/1) ... [2021-11-22 20:16:14,565 INFO L137 Inliner]: procedures = 679, calls = 1041, calls flagged for inlining = 547, calls inlined = 25, statements flattened = 430 [2021-11-22 20:16:14,571 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 20:16:14,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 20:16:14,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 20:16:14,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 20:16:14,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:16:14" (1/1) ... [2021-11-22 20:16:14,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:16:14" (1/1) ... [2021-11-22 20:16:14,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:16:14" (1/1) ... [2021-11-22 20:16:14,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:16:14" (1/1) ... [2021-11-22 20:16:14,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:16:14" (1/1) ... [2021-11-22 20:16:14,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:16:14" (1/1) ... [2021-11-22 20:16:14,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:16:14" (1/1) ... [2021-11-22 20:16:14,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 20:16:14,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 20:16:14,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 20:16:14,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 20:16:14,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:16:14" (1/1) ... [2021-11-22 20:16:14,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 20:16:14,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:16:14,689 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) [2021-11-22 20:16:14,711 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 [2021-11-22 20:16:14,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 20:16:14,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-22 20:16:14,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 20:16:14,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-22 20:16:14,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 20:16:14,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 20:16:14,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 20:16:14,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-22 20:16:14,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-22 20:16:14,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 20:16:14,944 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 20:16:14,945 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 20:16:15,263 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 20:16:15,269 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 20:16:15,269 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-22 20:16:15,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 08:16:15 BoogieIcfgContainer [2021-11-22 20:16:15,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 20:16:15,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 20:16:15,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 20:16:15,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 20:16:15,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 08:16:12" (1/3) ... [2021-11-22 20:16:15,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e61d575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 08:16:15, skipping insertion in model container [2021-11-22 20:16:15,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:16:14" (2/3) ... [2021-11-22 20:16:15,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e61d575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 08:16:15, skipping insertion in model container [2021-11-22 20:16:15,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 08:16:15" (3/3) ... [2021-11-22 20:16:15,281 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_begin_harness.i [2021-11-22 20:16:15,285 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 20:16:15,286 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-22 20:16:15,328 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 20:16:15,341 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 [2021-11-22 20:16:15,343 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-22 20:16:15,360 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 109 states have (on average 1.5596330275229358) internal successors, (170), 113 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-22 20:16:15,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:15,367 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:16:15,368 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:15,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:15,373 INFO L85 PathProgramCache]: Analyzing trace with hash -122732205, now seen corresponding path program 1 times [2021-11-22 20:16:15,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:15,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962750506] [2021-11-22 20:16:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:15,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:16:15,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:15,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962750506] [2021-11-22 20:16:15,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962750506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:15,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:15,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 20:16:15,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847892607] [2021-11-22 20:16:15,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:15,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 20:16:15,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:15,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 20:16:15,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 20:16:15,686 INFO L87 Difference]: Start difference. First operand has 114 states, 109 states have (on average 1.5596330275229358) internal successors, (170), 113 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:15,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:15,735 INFO L93 Difference]: Finished difference Result 224 states and 335 transitions. [2021-11-22 20:16:15,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 20:16:15,737 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-22 20:16:15,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:15,744 INFO L225 Difference]: With dead ends: 224 [2021-11-22 20:16:15,747 INFO L226 Difference]: Without dead ends: 109 [2021-11-22 20:16:15,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 20:16:15,757 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:15,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 20:16:15,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-22 20:16:15,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-22 20:16:15,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.457142857142857) internal successors, (153), 108 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:15,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 153 transitions. [2021-11-22 20:16:15,810 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 153 transitions. Word has length 41 [2021-11-22 20:16:15,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:15,813 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 153 transitions. [2021-11-22 20:16:15,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:15,814 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 153 transitions. [2021-11-22 20:16:15,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-22 20:16:15,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:15,817 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:16:15,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 20:16:15,818 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:15,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:15,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1738897517, now seen corresponding path program 1 times [2021-11-22 20:16:15,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:15,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344404346] [2021-11-22 20:16:15,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:15,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:16:15,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:15,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344404346] [2021-11-22 20:16:15,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344404346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:15,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:15,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 20:16:15,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067255623] [2021-11-22 20:16:15,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:15,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 20:16:15,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:15,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 20:16:15,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 20:16:15,971 INFO L87 Difference]: Start difference. First operand 109 states and 153 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:16,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:16,062 INFO L93 Difference]: Finished difference Result 208 states and 294 transitions. [2021-11-22 20:16:16,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 20:16:16,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-22 20:16:16,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:16,064 INFO L225 Difference]: With dead ends: 208 [2021-11-22 20:16:16,064 INFO L226 Difference]: Without dead ends: 109 [2021-11-22 20:16:16,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 20:16:16,066 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 140 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:16,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 272 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 20:16:16,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-22 20:16:16,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-22 20:16:16,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.4285714285714286) internal successors, (150), 108 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:16,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 150 transitions. [2021-11-22 20:16:16,078 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 150 transitions. Word has length 41 [2021-11-22 20:16:16,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:16,078 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 150 transitions. [2021-11-22 20:16:16,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:16,079 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 150 transitions. [2021-11-22 20:16:16,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-22 20:16:16,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:16,082 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:16:16,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 20:16:16,083 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:16,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:16,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1666510959, now seen corresponding path program 1 times [2021-11-22 20:16:16,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:16,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152526262] [2021-11-22 20:16:16,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:16,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:16:16,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:16,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152526262] [2021-11-22 20:16:16,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152526262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:16,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:16,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 20:16:16,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173810159] [2021-11-22 20:16:16,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:16,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 20:16:16,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:16,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 20:16:16,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 20:16:16,238 INFO L87 Difference]: Start difference. First operand 109 states and 150 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:16,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:16,290 INFO L93 Difference]: Finished difference Result 210 states and 280 transitions. [2021-11-22 20:16:16,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 20:16:16,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-22 20:16:16,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:16,294 INFO L225 Difference]: With dead ends: 210 [2021-11-22 20:16:16,295 INFO L226 Difference]: Without dead ends: 127 [2021-11-22 20:16:16,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 20:16:16,298 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 18 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:16,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 422 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 20:16:16,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-22 20:16:16,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 109. [2021-11-22 20:16:16,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.4095238095238096) internal successors, (148), 108 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:16,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 148 transitions. [2021-11-22 20:16:16,312 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 148 transitions. Word has length 41 [2021-11-22 20:16:16,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:16,312 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 148 transitions. [2021-11-22 20:16:16,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:16,313 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 148 transitions. [2021-11-22 20:16:16,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-22 20:16:16,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:16,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:16:16,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 20:16:16,314 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:16,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:16,314 INFO L85 PathProgramCache]: Analyzing trace with hash -423042159, now seen corresponding path program 1 times [2021-11-22 20:16:16,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:16,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558613121] [2021-11-22 20:16:16,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:16,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:16:16,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:16,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558613121] [2021-11-22 20:16:16,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558613121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:16,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:16,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 20:16:16,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662364556] [2021-11-22 20:16:16,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:16,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 20:16:16,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:16,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 20:16:16,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 20:16:16,456 INFO L87 Difference]: Start difference. First operand 109 states and 148 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:16,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:16,572 INFO L93 Difference]: Finished difference Result 217 states and 288 transitions. [2021-11-22 20:16:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 20:16:16,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-22 20:16:16,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:16,574 INFO L225 Difference]: With dead ends: 217 [2021-11-22 20:16:16,574 INFO L226 Difference]: Without dead ends: 135 [2021-11-22 20:16:16,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-22 20:16:16,575 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 362 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:16,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 214 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 20:16:16,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-22 20:16:16,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2021-11-22 20:16:16,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.380952380952381) internal successors, (145), 108 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:16,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 145 transitions. [2021-11-22 20:16:16,582 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 145 transitions. Word has length 45 [2021-11-22 20:16:16,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:16,583 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 145 transitions. [2021-11-22 20:16:16,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:16,583 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 145 transitions. [2021-11-22 20:16:16,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-22 20:16:16,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:16,584 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:16:16,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 20:16:16,584 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:16,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:16,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2072078671, now seen corresponding path program 1 times [2021-11-22 20:16:16,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:16,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91421346] [2021-11-22 20:16:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:16,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:16,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:16:16,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:16,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91421346] [2021-11-22 20:16:16,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91421346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:16,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:16,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 20:16:16,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915436469] [2021-11-22 20:16:16,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:16,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 20:16:16,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:16,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 20:16:16,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-22 20:16:16,727 INFO L87 Difference]: Start difference. First operand 109 states and 145 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:16,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:16,897 INFO L93 Difference]: Finished difference Result 296 states and 388 transitions. [2021-11-22 20:16:16,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 20:16:16,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-22 20:16:16,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:16,900 INFO L225 Difference]: With dead ends: 296 [2021-11-22 20:16:16,900 INFO L226 Difference]: Without dead ends: 213 [2021-11-22 20:16:16,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-22 20:16:16,905 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 670 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:16,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 331 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 20:16:16,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-22 20:16:16,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 112. [2021-11-22 20:16:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 108 states have (on average 1.3703703703703705) internal successors, (148), 111 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:16,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 148 transitions. [2021-11-22 20:16:16,929 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 148 transitions. Word has length 49 [2021-11-22 20:16:16,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:16,930 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 148 transitions. [2021-11-22 20:16:16,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:16,931 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 148 transitions. [2021-11-22 20:16:16,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-22 20:16:16,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:16,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:16:16,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 20:16:16,933 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:16,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:16,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1006498608, now seen corresponding path program 1 times [2021-11-22 20:16:16,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:16,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621699027] [2021-11-22 20:16:16,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:16,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:17,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:16:17,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:17,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621699027] [2021-11-22 20:16:17,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621699027] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:17,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:17,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 20:16:17,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343015238] [2021-11-22 20:16:17,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:17,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 20:16:17,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:17,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 20:16:17,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 20:16:17,071 INFO L87 Difference]: Start difference. First operand 112 states and 148 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:17,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:17,225 INFO L93 Difference]: Finished difference Result 299 states and 388 transitions. [2021-11-22 20:16:17,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 20:16:17,226 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-22 20:16:17,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:17,227 INFO L225 Difference]: With dead ends: 299 [2021-11-22 20:16:17,227 INFO L226 Difference]: Without dead ends: 214 [2021-11-22 20:16:17,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-22 20:16:17,230 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 606 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:17,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 308 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 20:16:17,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-22 20:16:17,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 115. [2021-11-22 20:16:17,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 111 states have (on average 1.3603603603603605) internal successors, (151), 114 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:17,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 151 transitions. [2021-11-22 20:16:17,245 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 151 transitions. Word has length 51 [2021-11-22 20:16:17,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:17,246 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 151 transitions. [2021-11-22 20:16:17,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:17,246 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 151 transitions. [2021-11-22 20:16:17,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-22 20:16:17,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:17,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:16:17,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 20:16:17,249 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:17,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:17,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1179077135, now seen corresponding path program 1 times [2021-11-22 20:16:17,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:17,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13049675] [2021-11-22 20:16:17,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:17,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:16:17,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:17,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13049675] [2021-11-22 20:16:17,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13049675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:17,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:17,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 20:16:17,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047946064] [2021-11-22 20:16:17,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:17,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 20:16:17,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:17,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 20:16:17,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 20:16:17,329 INFO L87 Difference]: Start difference. First operand 115 states and 151 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:17,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:17,394 INFO L93 Difference]: Finished difference Result 226 states and 298 transitions. [2021-11-22 20:16:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 20:16:17,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-22 20:16:17,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:17,397 INFO L225 Difference]: With dead ends: 226 [2021-11-22 20:16:17,399 INFO L226 Difference]: Without dead ends: 131 [2021-11-22 20:16:17,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 20:16:17,401 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 9 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:17,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 392 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 20:16:17,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-22 20:16:17,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 123. [2021-11-22 20:16:17,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 119 states have (on average 1.3361344537815125) internal successors, (159), 122 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 159 transitions. [2021-11-22 20:16:17,409 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 159 transitions. Word has length 61 [2021-11-22 20:16:17,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:17,411 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 159 transitions. [2021-11-22 20:16:17,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:17,412 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 159 transitions. [2021-11-22 20:16:17,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-22 20:16:17,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:17,414 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:16:17,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 20:16:17,415 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:17,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:17,415 INFO L85 PathProgramCache]: Analyzing trace with hash -192730163, now seen corresponding path program 1 times [2021-11-22 20:16:17,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:17,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474432097] [2021-11-22 20:16:17,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:17,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:16:17,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:17,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474432097] [2021-11-22 20:16:17,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474432097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:17,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:17,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 20:16:17,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538821306] [2021-11-22 20:16:17,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:17,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 20:16:17,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:17,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 20:16:17,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-22 20:16:17,517 INFO L87 Difference]: Start difference. First operand 123 states and 159 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:17,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:17,705 INFO L93 Difference]: Finished difference Result 324 states and 415 transitions. [2021-11-22 20:16:17,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 20:16:17,705 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-22 20:16:17,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:17,706 INFO L225 Difference]: With dead ends: 324 [2021-11-22 20:16:17,706 INFO L226 Difference]: Without dead ends: 221 [2021-11-22 20:16:17,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-22 20:16:17,708 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 624 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:17,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 428 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 20:16:17,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-22 20:16:17,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 126. [2021-11-22 20:16:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 122 states have (on average 1.3278688524590163) internal successors, (162), 125 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 162 transitions. [2021-11-22 20:16:17,714 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 162 transitions. Word has length 61 [2021-11-22 20:16:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:17,715 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 162 transitions. [2021-11-22 20:16:17,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:17,716 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 162 transitions. [2021-11-22 20:16:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-22 20:16:17,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:17,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:16:17,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 20:16:17,717 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:17,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:17,718 INFO L85 PathProgramCache]: Analyzing trace with hash 930930641, now seen corresponding path program 1 times [2021-11-22 20:16:17,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:17,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557701626] [2021-11-22 20:16:17,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:17,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:16:17,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:17,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557701626] [2021-11-22 20:16:17,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557701626] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:17,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:17,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 20:16:17,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677455719] [2021-11-22 20:16:17,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:17,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 20:16:17,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:17,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 20:16:17,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 20:16:17,804 INFO L87 Difference]: Start difference. First operand 126 states and 162 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:17,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:17,859 INFO L93 Difference]: Finished difference Result 269 states and 334 transitions. [2021-11-22 20:16:17,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 20:16:17,860 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-22 20:16:17,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:17,862 INFO L225 Difference]: With dead ends: 269 [2021-11-22 20:16:17,862 INFO L226 Difference]: Without dead ends: 172 [2021-11-22 20:16:17,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 20:16:17,865 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 52 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:17,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 592 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 20:16:17,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-22 20:16:17,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2021-11-22 20:16:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 122 states have (on average 1.3114754098360655) internal successors, (160), 125 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:17,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 160 transitions. [2021-11-22 20:16:17,870 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 160 transitions. Word has length 61 [2021-11-22 20:16:17,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:17,871 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 160 transitions. [2021-11-22 20:16:17,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:17,871 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 160 transitions. [2021-11-22 20:16:17,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-22 20:16:17,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:17,872 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:16:17,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 20:16:17,872 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:17,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:17,873 INFO L85 PathProgramCache]: Analyzing trace with hash -961072015, now seen corresponding path program 1 times [2021-11-22 20:16:17,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:17,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448559533] [2021-11-22 20:16:17,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:17,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 20:16:18,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:18,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448559533] [2021-11-22 20:16:18,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448559533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:16:18,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405730049] [2021-11-22 20:16:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:18,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:16:18,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:16:18,040 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) [2021-11-22 20:16:18,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 20:16:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:18,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-22 20:16:18,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:16:18,308 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 20:16:18,309 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 19 treesize of output 24 [2021-11-22 20:16:18,322 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 20:16:18,323 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 19 treesize of output 24 [2021-11-22 20:16:18,689 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 32 treesize of output 24 [2021-11-22 20:16:18,692 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 21 treesize of output 13 [2021-11-22 20:16:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 20:16:18,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:16:18,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 20:16:18,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405730049] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 20:16:18,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 20:16:18,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 16 [2021-11-22 20:16:18,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659039908] [2021-11-22 20:16:18,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 20:16:18,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-22 20:16:18,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:18,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-22 20:16:18,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-22 20:16:18,923 INFO L87 Difference]: Start difference. First operand 126 states and 160 transitions. Second operand has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:21,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:21,205 INFO L93 Difference]: Finished difference Result 722 states and 892 transitions. [2021-11-22 20:16:21,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-22 20:16:21,205 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-22 20:16:21,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:21,209 INFO L225 Difference]: With dead ends: 722 [2021-11-22 20:16:21,209 INFO L226 Difference]: Without dead ends: 627 [2021-11-22 20:16:21,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1065, Invalid=3765, Unknown=0, NotChecked=0, Total=4830 [2021-11-22 20:16:21,212 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 1645 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1645 SdHoareTripleChecker+Valid, 1348 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:21,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1645 Valid, 1348 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-22 20:16:21,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-11-22 20:16:21,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 188. [2021-11-22 20:16:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 184 states have (on average 1.309782608695652) internal successors, (241), 187 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:21,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 241 transitions. [2021-11-22 20:16:21,225 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 241 transitions. Word has length 65 [2021-11-22 20:16:21,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:21,225 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 241 transitions. [2021-11-22 20:16:21,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:21,226 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 241 transitions. [2021-11-22 20:16:21,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-22 20:16:21,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:21,227 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:16:21,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 20:16:21,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-22 20:16:21,450 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:21,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:21,451 INFO L85 PathProgramCache]: Analyzing trace with hash 700473009, now seen corresponding path program 1 times [2021-11-22 20:16:21,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:21,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056775349] [2021-11-22 20:16:21,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:21,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:21,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 20:16:21,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:21,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056775349] [2021-11-22 20:16:21,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056775349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:21,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:21,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 20:16:21,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849652694] [2021-11-22 20:16:21,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:21,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 20:16:21,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:21,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 20:16:21,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 20:16:21,503 INFO L87 Difference]: Start difference. First operand 188 states and 241 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:21,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:21,569 INFO L93 Difference]: Finished difference Result 359 states and 465 transitions. [2021-11-22 20:16:21,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 20:16:21,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-22 20:16:21,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:21,571 INFO L225 Difference]: With dead ends: 359 [2021-11-22 20:16:21,571 INFO L226 Difference]: Without dead ends: 200 [2021-11-22 20:16:21,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 20:16:21,572 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 32 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:21,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 413 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 20:16:21,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-22 20:16:21,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 188. [2021-11-22 20:16:21,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 184 states have (on average 1.2880434782608696) internal successors, (237), 187 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:21,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 237 transitions. [2021-11-22 20:16:21,582 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 237 transitions. Word has length 65 [2021-11-22 20:16:21,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:21,582 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 237 transitions. [2021-11-22 20:16:21,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:21,582 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 237 transitions. [2021-11-22 20:16:21,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-22 20:16:21,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:21,586 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:16:21,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 20:16:21,586 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:21,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:21,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1167005937, now seen corresponding path program 1 times [2021-11-22 20:16:21,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:21,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104782955] [2021-11-22 20:16:21,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:21,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 20:16:21,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:21,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104782955] [2021-11-22 20:16:21,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104782955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:21,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:21,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-22 20:16:21,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60324050] [2021-11-22 20:16:21,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:21,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 20:16:21,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:21,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 20:16:21,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-22 20:16:21,714 INFO L87 Difference]: Start difference. First operand 188 states and 237 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:22,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:22,096 INFO L93 Difference]: Finished difference Result 477 states and 611 transitions. [2021-11-22 20:16:22,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 20:16:22,096 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-22 20:16:22,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:22,098 INFO L225 Difference]: With dead ends: 477 [2021-11-22 20:16:22,098 INFO L226 Difference]: Without dead ends: 316 [2021-11-22 20:16:22,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-22 20:16:22,099 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 800 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:22,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [800 Valid, 407 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 20:16:22,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-22 20:16:22,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 161. [2021-11-22 20:16:22,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 157 states have (on average 1.2929936305732483) internal successors, (203), 160 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:22,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 203 transitions. [2021-11-22 20:16:22,108 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 203 transitions. Word has length 65 [2021-11-22 20:16:22,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:22,109 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 203 transitions. [2021-11-22 20:16:22,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:22,109 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 203 transitions. [2021-11-22 20:16:22,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-22 20:16:22,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:22,109 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 20:16:22,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 20:16:22,110 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:22,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:22,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1164925684, now seen corresponding path program 1 times [2021-11-22 20:16:22,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:22,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631921916] [2021-11-22 20:16:22,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:22,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 20:16:22,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:22,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631921916] [2021-11-22 20:16:22,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631921916] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:22,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:22,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-22 20:16:22,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650877102] [2021-11-22 20:16:22,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:22,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 20:16:22,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:22,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 20:16:22,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-22 20:16:22,344 INFO L87 Difference]: Start difference. First operand 161 states and 203 transitions. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:22,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:22,676 INFO L93 Difference]: Finished difference Result 252 states and 317 transitions. [2021-11-22 20:16:22,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 20:16:22,677 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-22 20:16:22,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:22,678 INFO L225 Difference]: With dead ends: 252 [2021-11-22 20:16:22,678 INFO L226 Difference]: Without dead ends: 204 [2021-11-22 20:16:22,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-11-22 20:16:22,679 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 624 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:22,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 363 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 20:16:22,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-22 20:16:22,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 164. [2021-11-22 20:16:22,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 160 states have (on average 1.2875) internal successors, (206), 163 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 206 transitions. [2021-11-22 20:16:22,690 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 206 transitions. Word has length 67 [2021-11-22 20:16:22,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:22,690 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 206 transitions. [2021-11-22 20:16:22,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:22,690 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 206 transitions. [2021-11-22 20:16:22,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-22 20:16:22,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:22,691 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 20:16:22,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 20:16:22,692 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:22,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:22,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1166772726, now seen corresponding path program 1 times [2021-11-22 20:16:22,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:22,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716928583] [2021-11-22 20:16:22,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:22,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:22,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 20:16:22,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:22,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716928583] [2021-11-22 20:16:22,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716928583] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:22,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:22,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-22 20:16:22,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509296203] [2021-11-22 20:16:22,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:22,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 20:16:22,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:22,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 20:16:22,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-22 20:16:22,881 INFO L87 Difference]: Start difference. First operand 164 states and 206 transitions. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:23,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:23,168 INFO L93 Difference]: Finished difference Result 324 states and 409 transitions. [2021-11-22 20:16:23,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 20:16:23,169 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-22 20:16:23,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:23,169 INFO L225 Difference]: With dead ends: 324 [2021-11-22 20:16:23,170 INFO L226 Difference]: Without dead ends: 176 [2021-11-22 20:16:23,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-11-22 20:16:23,171 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 589 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:23,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 305 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 20:16:23,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-22 20:16:23,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2021-11-22 20:16:23,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 168 states have (on average 1.2738095238095237) internal successors, (214), 171 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:23,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 214 transitions. [2021-11-22 20:16:23,182 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 214 transitions. Word has length 67 [2021-11-22 20:16:23,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:23,183 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 214 transitions. [2021-11-22 20:16:23,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:23,183 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 214 transitions. [2021-11-22 20:16:23,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-22 20:16:23,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:23,184 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 20:16:23,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 20:16:23,184 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:23,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:23,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1353187208, now seen corresponding path program 1 times [2021-11-22 20:16:23,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:23,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427428296] [2021-11-22 20:16:23,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:23,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 20:16:23,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:23,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427428296] [2021-11-22 20:16:23,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427428296] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:23,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:23,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-22 20:16:23,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149261440] [2021-11-22 20:16:23,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:23,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 20:16:23,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:23,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 20:16:23,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-22 20:16:23,443 INFO L87 Difference]: Start difference. First operand 172 states and 214 transitions. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:24,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:24,024 INFO L93 Difference]: Finished difference Result 556 states and 695 transitions. [2021-11-22 20:16:24,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-22 20:16:24,025 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-22 20:16:24,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:24,027 INFO L225 Difference]: With dead ends: 556 [2021-11-22 20:16:24,027 INFO L226 Difference]: Without dead ends: 435 [2021-11-22 20:16:24,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-11-22 20:16:24,030 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 720 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:24,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 751 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 20:16:24,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-11-22 20:16:24,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 317. [2021-11-22 20:16:24,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 313 states have (on average 1.268370607028754) internal successors, (397), 316 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:24,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 397 transitions. [2021-11-22 20:16:24,052 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 397 transitions. Word has length 67 [2021-11-22 20:16:24,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:24,052 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 397 transitions. [2021-11-22 20:16:24,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:24,052 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 397 transitions. [2021-11-22 20:16:24,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-22 20:16:24,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:24,053 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 20:16:24,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 20:16:24,054 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:24,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:24,054 INFO L85 PathProgramCache]: Analyzing trace with hash -673128838, now seen corresponding path program 1 times [2021-11-22 20:16:24,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:24,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181050612] [2021-11-22 20:16:24,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:24,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 20:16:24,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:24,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181050612] [2021-11-22 20:16:24,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181050612] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:16:24,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535103289] [2021-11-22 20:16:24,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:24,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:16:24,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:16:24,261 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) [2021-11-22 20:16:24,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 20:16:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:24,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-22 20:16:24,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:16:24,497 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 20:16:24,497 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 [2021-11-22 20:16:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 20:16:24,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:16:25,242 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 121 treesize of output 113 [2021-11-22 20:16:25,245 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 113 treesize of output 105 [2021-11-22 20:16:25,248 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 105 treesize of output 101 [2021-11-22 20:16:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 20:16:25,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535103289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 20:16:25,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 20:16:25,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 26 [2021-11-22 20:16:25,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704812352] [2021-11-22 20:16:25,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 20:16:25,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-22 20:16:25,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:25,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-22 20:16:25,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-11-22 20:16:25,342 INFO L87 Difference]: Start difference. First operand 317 states and 397 transitions. Second operand has 26 states, 26 states have (on average 5.3076923076923075) internal successors, (138), 26 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:27,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:27,480 INFO L93 Difference]: Finished difference Result 1525 states and 1884 transitions. [2021-11-22 20:16:27,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-22 20:16:27,480 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.3076923076923075) internal successors, (138), 26 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-22 20:16:27,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:27,485 INFO L225 Difference]: With dead ends: 1525 [2021-11-22 20:16:27,485 INFO L226 Difference]: Without dead ends: 1421 [2021-11-22 20:16:27,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1243, Invalid=3449, Unknown=0, NotChecked=0, Total=4692 [2021-11-22 20:16:27,488 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 4509 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4509 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:27,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4509 Valid, 1173 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-22 20:16:27,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-11-22 20:16:27,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 432. [2021-11-22 20:16:27,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 428 states have (on average 1.2476635514018692) internal successors, (534), 431 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:27,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 534 transitions. [2021-11-22 20:16:27,526 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 534 transitions. Word has length 67 [2021-11-22 20:16:27,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:27,526 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 534 transitions. [2021-11-22 20:16:27,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.3076923076923075) internal successors, (138), 26 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:27,527 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 534 transitions. [2021-11-22 20:16:27,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-22 20:16:27,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:27,528 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 20:16:27,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 20:16:27,748 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,SelfDestructingSolverStorable15 [2021-11-22 20:16:27,748 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:27,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:27,749 INFO L85 PathProgramCache]: Analyzing trace with hash 27935740, now seen corresponding path program 1 times [2021-11-22 20:16:27,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:27,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405635684] [2021-11-22 20:16:27,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:27,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 20:16:27,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:27,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405635684] [2021-11-22 20:16:27,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405635684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:27,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:27,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 20:16:27,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211784098] [2021-11-22 20:16:27,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:27,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 20:16:27,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:27,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 20:16:27,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 20:16:27,833 INFO L87 Difference]: Start difference. First operand 432 states and 534 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:27,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:27,898 INFO L93 Difference]: Finished difference Result 582 states and 731 transitions. [2021-11-22 20:16:27,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 20:16:27,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-22 20:16:27,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:27,900 INFO L225 Difference]: With dead ends: 582 [2021-11-22 20:16:27,900 INFO L226 Difference]: Without dead ends: 432 [2021-11-22 20:16:27,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-22 20:16:27,901 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 183 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:27,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 284 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 20:16:27,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-22 20:16:27,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2021-11-22 20:16:27,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 428 states have (on average 1.233644859813084) internal successors, (528), 431 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:27,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 528 transitions. [2021-11-22 20:16:27,928 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 528 transitions. Word has length 67 [2021-11-22 20:16:27,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:27,928 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 528 transitions. [2021-11-22 20:16:27,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:27,929 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 528 transitions. [2021-11-22 20:16:27,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-22 20:16:27,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:27,930 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 20:16:27,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-22 20:16:27,930 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:27,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:27,930 INFO L85 PathProgramCache]: Analyzing trace with hash 33598202, now seen corresponding path program 1 times [2021-11-22 20:16:27,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:27,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861750723] [2021-11-22 20:16:27,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:27,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 20:16:27,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:27,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861750723] [2021-11-22 20:16:27,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861750723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:27,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:27,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 20:16:27,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065585599] [2021-11-22 20:16:27,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:27,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 20:16:27,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:27,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 20:16:27,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 20:16:27,974 INFO L87 Difference]: Start difference. First operand 432 states and 528 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:28,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:28,017 INFO L93 Difference]: Finished difference Result 513 states and 627 transitions. [2021-11-22 20:16:28,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 20:16:28,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-22 20:16:28,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:28,019 INFO L225 Difference]: With dead ends: 513 [2021-11-22 20:16:28,019 INFO L226 Difference]: Without dead ends: 202 [2021-11-22 20:16:28,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 20:16:28,020 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 6 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:28,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 355 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 20:16:28,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-22 20:16:28,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-11-22 20:16:28,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 198 states have (on average 1.1919191919191918) internal successors, (236), 201 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:28,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 236 transitions. [2021-11-22 20:16:28,035 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 236 transitions. Word has length 67 [2021-11-22 20:16:28,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:28,035 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 236 transitions. [2021-11-22 20:16:28,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:28,035 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 236 transitions. [2021-11-22 20:16:28,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-22 20:16:28,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:28,036 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:16:28,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-22 20:16:28,037 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:28,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:28,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1384277337, now seen corresponding path program 1 times [2021-11-22 20:16:28,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:28,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295546292] [2021-11-22 20:16:28,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:28,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 20:16:28,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:28,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295546292] [2021-11-22 20:16:28,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295546292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:28,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:28,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 20:16:28,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161315958] [2021-11-22 20:16:28,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:28,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 20:16:28,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:28,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 20:16:28,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-22 20:16:28,125 INFO L87 Difference]: Start difference. First operand 202 states and 236 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:28,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:28,194 INFO L93 Difference]: Finished difference Result 251 states and 291 transitions. [2021-11-22 20:16:28,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 20:16:28,195 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-22 20:16:28,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:28,196 INFO L225 Difference]: With dead ends: 251 [2021-11-22 20:16:28,196 INFO L226 Difference]: Without dead ends: 202 [2021-11-22 20:16:28,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-22 20:16:28,197 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 379 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:28,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 141 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 20:16:28,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-22 20:16:28,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-11-22 20:16:28,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 198 states have (on average 1.1868686868686869) internal successors, (235), 201 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:28,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 235 transitions. [2021-11-22 20:16:28,211 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 235 transitions. Word has length 69 [2021-11-22 20:16:28,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:28,211 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 235 transitions. [2021-11-22 20:16:28,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:28,212 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 235 transitions. [2021-11-22 20:16:28,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-22 20:16:28,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:28,212 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 20:16:28,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-22 20:16:28,213 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:28,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:28,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1367555841, now seen corresponding path program 1 times [2021-11-22 20:16:28,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:28,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903773727] [2021-11-22 20:16:28,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:28,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 20:16:28,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:28,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903773727] [2021-11-22 20:16:28,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903773727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:28,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:28,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 20:16:28,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917043099] [2021-11-22 20:16:28,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:28,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 20:16:28,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:28,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 20:16:28,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-22 20:16:28,324 INFO L87 Difference]: Start difference. First operand 202 states and 235 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:28,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:28,481 INFO L93 Difference]: Finished difference Result 321 states and 360 transitions. [2021-11-22 20:16:28,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 20:16:28,481 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-22 20:16:28,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:28,482 INFO L225 Difference]: With dead ends: 321 [2021-11-22 20:16:28,483 INFO L226 Difference]: Without dead ends: 271 [2021-11-22 20:16:28,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-22 20:16:28,483 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 558 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:28,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 250 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 20:16:28,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-22 20:16:28,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 202. [2021-11-22 20:16:28,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 198 states have (on average 1.1818181818181819) internal successors, (234), 201 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:28,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 234 transitions. [2021-11-22 20:16:28,498 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 234 transitions. Word has length 72 [2021-11-22 20:16:28,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:28,498 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 234 transitions. [2021-11-22 20:16:28,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:28,499 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 234 transitions. [2021-11-22 20:16:28,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-22 20:16:28,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:28,500 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 20:16:28,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-22 20:16:28,500 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:28,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:28,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1040503474, now seen corresponding path program 1 times [2021-11-22 20:16:28,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:28,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722644127] [2021-11-22 20:16:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:28,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:28,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 20:16:28,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:28,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722644127] [2021-11-22 20:16:28,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722644127] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:28,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:28,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 20:16:28,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380728153] [2021-11-22 20:16:28,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:28,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 20:16:28,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:28,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 20:16:28,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 20:16:28,549 INFO L87 Difference]: Start difference. First operand 202 states and 234 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:28,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:28,612 INFO L93 Difference]: Finished difference Result 410 states and 470 transitions. [2021-11-22 20:16:28,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 20:16:28,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-22 20:16:28,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:28,614 INFO L225 Difference]: With dead ends: 410 [2021-11-22 20:16:28,614 INFO L226 Difference]: Without dead ends: 259 [2021-11-22 20:16:28,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 20:16:28,615 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 89 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:28,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 279 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 20:16:28,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-22 20:16:28,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 190. [2021-11-22 20:16:28,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 186 states have (on average 1.1612903225806452) internal successors, (216), 189 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:28,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 216 transitions. [2021-11-22 20:16:28,629 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 216 transitions. Word has length 74 [2021-11-22 20:16:28,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:28,630 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 216 transitions. [2021-11-22 20:16:28,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:28,630 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 216 transitions. [2021-11-22 20:16:28,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-22 20:16:28,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:28,631 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 20:16:28,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-22 20:16:28,631 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:28,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:28,632 INFO L85 PathProgramCache]: Analyzing trace with hash 500105518, now seen corresponding path program 1 times [2021-11-22 20:16:28,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:28,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792273180] [2021-11-22 20:16:28,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:28,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 20:16:28,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:28,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792273180] [2021-11-22 20:16:28,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792273180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:28,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:28,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 20:16:28,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129152255] [2021-11-22 20:16:28,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:28,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 20:16:28,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:28,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 20:16:28,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-22 20:16:28,799 INFO L87 Difference]: Start difference. First operand 190 states and 216 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:29,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:29,136 INFO L93 Difference]: Finished difference Result 478 states and 527 transitions. [2021-11-22 20:16:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 20:16:29,138 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-22 20:16:29,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:29,139 INFO L225 Difference]: With dead ends: 478 [2021-11-22 20:16:29,139 INFO L226 Difference]: Without dead ends: 355 [2021-11-22 20:16:29,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-22 20:16:29,140 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 304 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:29,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 470 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 20:16:29,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-11-22 20:16:29,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 194. [2021-11-22 20:16:29,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 190 states have (on average 1.1578947368421053) internal successors, (220), 193 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:29,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 220 transitions. [2021-11-22 20:16:29,158 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 220 transitions. Word has length 74 [2021-11-22 20:16:29,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:29,158 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 220 transitions. [2021-11-22 20:16:29,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:29,158 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 220 transitions. [2021-11-22 20:16:29,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-22 20:16:29,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:29,159 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 20:16:29,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-22 20:16:29,160 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:29,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:29,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1393591856, now seen corresponding path program 1 times [2021-11-22 20:16:29,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:29,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935304308] [2021-11-22 20:16:29,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:29,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 20:16:29,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:29,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935304308] [2021-11-22 20:16:29,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935304308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:16:29,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388576192] [2021-11-22 20:16:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:29,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:16:29,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:16:29,328 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) [2021-11-22 20:16:29,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 20:16:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:29,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-22 20:16:29,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:16:29,581 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 20:16:29,581 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 19 treesize of output 24 [2021-11-22 20:16:29,591 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 20:16:29,592 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 19 treesize of output 24 [2021-11-22 20:16:30,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 20:16:30,256 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 32 treesize of output 27 [2021-11-22 20:16:30,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 20:16:30,262 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 21 treesize of output 16 [2021-11-22 20:16:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:16:30,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:16:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:16:30,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388576192] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 20:16:30,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 20:16:30,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 32 [2021-11-22 20:16:30,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153508545] [2021-11-22 20:16:30,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 20:16:30,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-22 20:16:30,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:30,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-22 20:16:30,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-11-22 20:16:30,970 INFO L87 Difference]: Start difference. First operand 194 states and 220 transitions. Second operand has 32 states, 32 states have (on average 5.90625) internal successors, (189), 32 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:33,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:33,746 INFO L93 Difference]: Finished difference Result 751 states and 824 transitions. [2021-11-22 20:16:33,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-22 20:16:33,747 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.90625) internal successors, (189), 32 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-22 20:16:33,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:33,748 INFO L225 Difference]: With dead ends: 751 [2021-11-22 20:16:33,748 INFO L226 Difference]: Without dead ends: 667 [2021-11-22 20:16:33,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1001, Invalid=3159, Unknown=0, NotChecked=0, Total=4160 [2021-11-22 20:16:33,750 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 5405 mSDsluCounter, 1916 mSDsCounter, 0 mSdLazyCounter, 1950 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5405 SdHoareTripleChecker+Valid, 2112 SdHoareTripleChecker+Invalid, 2624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 1950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:33,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5405 Valid, 2112 Invalid, 2624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 1950 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-22 20:16:33,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-11-22 20:16:33,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 262. [2021-11-22 20:16:33,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 258 states have (on average 1.1550387596899225) internal successors, (298), 261 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:33,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 298 transitions. [2021-11-22 20:16:33,790 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 298 transitions. Word has length 74 [2021-11-22 20:16:33,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:33,790 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 298 transitions. [2021-11-22 20:16:33,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.90625) internal successors, (189), 32 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:33,790 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 298 transitions. [2021-11-22 20:16:33,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-22 20:16:33,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:33,791 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:16:33,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 20:16:34,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:16:34,004 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:34,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:34,004 INFO L85 PathProgramCache]: Analyzing trace with hash 841974699, now seen corresponding path program 1 times [2021-11-22 20:16:34,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:34,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372205043] [2021-11-22 20:16:34,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:34,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 20:16:34,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:34,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372205043] [2021-11-22 20:16:34,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372205043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:16:34,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719876606] [2021-11-22 20:16:34,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:34,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:16:34,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:16:34,448 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) [2021-11-22 20:16:34,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 20:16:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:34,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 141 conjunts are in the unsatisfiable core [2021-11-22 20:16:34,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:16:34,689 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-11-22 20:16:34,693 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 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-22 20:16:34,697 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-11-22 20:16:34,700 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 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-22 20:16:35,998 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-22 20:16:35,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 87 [2021-11-22 20:16:36,013 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-11-22 20:16:36,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 34 [2021-11-22 20:16:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 20:16:36,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:16:37,065 INFO L354 Elim1Store]: treesize reduction 52, result has 20.0 percent of original size [2021-11-22 20:16:37,066 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 4722 treesize of output 4274 [2021-11-22 20:16:37,247 INFO L354 Elim1Store]: treesize reduction 23, result has 86.1 percent of original size [2021-11-22 20:16:37,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 24120 treesize of output 22497 [2021-11-22 20:16:37,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 20:16:37,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 27539 treesize of output 26447 [2021-11-22 20:16:38,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 20:16:38,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 25147 treesize of output 24197 [2021-11-22 20:16:39,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 20:16:39,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 26665 treesize of output 26403 [2021-11-22 20:16:39,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 20:16:39,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 26357 treesize of output 26284 [2021-11-22 20:16:40,236 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-22 20:16:40,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-22 20:16:40,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-22 20:16:40,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833276184] [2021-11-22 20:16:40,237 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-22 20:16:40,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-22 20:16:40,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:40,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-22 20:16:40,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2021-11-22 20:16:40,239 INFO L87 Difference]: Start difference. First operand 262 states and 298 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:44,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:44,499 INFO L93 Difference]: Finished difference Result 824 states and 919 transitions. [2021-11-22 20:16:44,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-22 20:16:44,499 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-22 20:16:44,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:44,502 INFO L225 Difference]: With dead ends: 824 [2021-11-22 20:16:44,502 INFO L226 Difference]: Without dead ends: 749 [2021-11-22 20:16:44,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1318, Invalid=5324, Unknown=0, NotChecked=0, Total=6642 [2021-11-22 20:16:44,504 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 2762 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2762 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:44,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2762 Valid, 1585 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-22 20:16:44,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-11-22 20:16:44,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 501. [2021-11-22 20:16:44,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 497 states have (on average 1.1488933601609659) internal successors, (571), 500 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:44,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 571 transitions. [2021-11-22 20:16:44,556 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 571 transitions. Word has length 77 [2021-11-22 20:16:44,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:44,556 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 571 transitions. [2021-11-22 20:16:44,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:44,557 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 571 transitions. [2021-11-22 20:16:44,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-22 20:16:44,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:44,558 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:16:44,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 20:16:44,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:16:44,780 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:44,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:44,780 INFO L85 PathProgramCache]: Analyzing trace with hash 32628073, now seen corresponding path program 1 times [2021-11-22 20:16:44,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:44,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182624383] [2021-11-22 20:16:44,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:44,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 20:16:45,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:45,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182624383] [2021-11-22 20:16:45,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182624383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:16:45,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748280973] [2021-11-22 20:16:45,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:45,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:16:45,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:16:45,001 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) [2021-11-22 20:16:45,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 20:16:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:45,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-22 20:16:45,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:16:45,282 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 20:16:45,283 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 [2021-11-22 20:16:45,960 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 40 treesize of output 28 [2021-11-22 20:16:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 20:16:45,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:16:46,319 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 236 treesize of output 220 [2021-11-22 20:16:46,322 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 220 treesize of output 212 [2021-11-22 20:16:46,325 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 212 treesize of output 196 [2021-11-22 20:16:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 20:16:46,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748280973] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 20:16:46,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 20:16:46,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 16] total 36 [2021-11-22 20:16:46,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608542776] [2021-11-22 20:16:46,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 20:16:46,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-22 20:16:46,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:46,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-22 20:16:46,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2021-11-22 20:16:46,632 INFO L87 Difference]: Start difference. First operand 501 states and 571 transitions. Second operand has 36 states, 36 states have (on average 4.722222222222222) internal successors, (170), 36 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:49,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:49,171 INFO L93 Difference]: Finished difference Result 1226 states and 1379 transitions. [2021-11-22 20:16:49,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-22 20:16:49,172 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.722222222222222) internal successors, (170), 36 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-22 20:16:49,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:49,174 INFO L225 Difference]: With dead ends: 1226 [2021-11-22 20:16:49,175 INFO L226 Difference]: Without dead ends: 935 [2021-11-22 20:16:49,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1097, Invalid=3325, Unknown=0, NotChecked=0, Total=4422 [2021-11-22 20:16:49,177 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 4893 mSDsluCounter, 1535 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 678 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4893 SdHoareTripleChecker+Valid, 1633 SdHoareTripleChecker+Invalid, 2095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 678 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:49,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4893 Valid, 1633 Invalid, 2095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [678 Valid, 1417 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-22 20:16:49,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-11-22 20:16:49,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 602. [2021-11-22 20:16:49,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 598 states have (on average 1.140468227424749) internal successors, (682), 601 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:49,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 682 transitions. [2021-11-22 20:16:49,240 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 682 transitions. Word has length 77 [2021-11-22 20:16:49,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:49,241 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 682 transitions. [2021-11-22 20:16:49,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.722222222222222) internal successors, (170), 36 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:49,241 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 682 transitions. [2021-11-22 20:16:49,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-22 20:16:49,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:49,242 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:16:49,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 20:16:49,462 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,SelfDestructingSolverStorable24 [2021-11-22 20:16:49,463 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:49,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:49,464 INFO L85 PathProgramCache]: Analyzing trace with hash 866410317, now seen corresponding path program 1 times [2021-11-22 20:16:49,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:49,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721391843] [2021-11-22 20:16:49,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:49,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 20:16:49,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:49,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721391843] [2021-11-22 20:16:49,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721391843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:16:49,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054949878] [2021-11-22 20:16:49,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:49,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:16:49,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:16:49,718 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) [2021-11-22 20:16:49,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 20:16:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:49,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-22 20:16:49,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:16:50,043 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 [2021-11-22 20:16:50,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:16:50,047 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 [2021-11-22 20:16:50,108 INFO L354 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2021-11-22 20:16:50,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 63 [2021-11-22 20:16:50,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:16:50,113 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 59 treesize of output 55 [2021-11-22 20:16:50,117 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 65 treesize of output 64 [2021-11-22 20:16:50,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:16:50,129 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 31 treesize of output 23 [2021-11-22 20:16:50,132 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 [2021-11-22 20:16:50,331 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 9 [2021-11-22 20:16:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 20:16:50,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:16:50,575 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1222 Int) (v_ArrVal_1223 (Array Int Int)) (v_ArrVal_1221 (Array Int Int))) (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1223) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1221) |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_1222)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|)))) is different from false [2021-11-22 20:16:50,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 20:16:50,605 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 44 treesize of output 36 [2021-11-22 20:16:50,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 20:16:50,620 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 306 treesize of output 284 [2021-11-22 20:16:50,631 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 336 treesize of output 328 [2021-11-22 20:16:50,637 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 328 treesize of output 324 [2021-11-22 20:16:50,703 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 [2021-11-22 20:16:50,768 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 24 treesize of output 22 [2021-11-22 20:16:50,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 20:16:50,806 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 62 treesize of output 60 [2021-11-22 20:16:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 1 not checked. [2021-11-22 20:16:50,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054949878] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 20:16:50,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 20:16:50,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 27 [2021-11-22 20:16:50,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300244320] [2021-11-22 20:16:50,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 20:16:50,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-22 20:16:50,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:50,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-22 20:16:50,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=587, Unknown=1, NotChecked=48, Total=702 [2021-11-22 20:16:50,974 INFO L87 Difference]: Start difference. First operand 602 states and 682 transitions. Second operand has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:52,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:52,847 INFO L93 Difference]: Finished difference Result 943 states and 1057 transitions. [2021-11-22 20:16:52,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-22 20:16:52,848 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-22 20:16:52,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:52,850 INFO L225 Difference]: With dead ends: 943 [2021-11-22 20:16:52,850 INFO L226 Difference]: Without dead ends: 770 [2021-11-22 20:16:52,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=368, Invalid=1357, Unknown=1, NotChecked=80, Total=1806 [2021-11-22 20:16:52,853 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 4138 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4138 SdHoareTripleChecker+Valid, 1955 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:52,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4138 Valid, 1955 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1322 Invalid, 0 Unknown, 323 Unchecked, 0.9s Time] [2021-11-22 20:16:52,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2021-11-22 20:16:52,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 458. [2021-11-22 20:16:52,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 454 states have (on average 1.1431718061674008) internal successors, (519), 457 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:52,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 519 transitions. [2021-11-22 20:16:52,912 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 519 transitions. Word has length 79 [2021-11-22 20:16:52,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:52,912 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 519 transitions. [2021-11-22 20:16:52,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:52,913 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 519 transitions. [2021-11-22 20:16:52,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-22 20:16:52,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:52,914 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:16:52,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 20:16:53,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-22 20:16:53,138 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:53,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:53,139 INFO L85 PathProgramCache]: Analyzing trace with hash 561523053, now seen corresponding path program 1 times [2021-11-22 20:16:53,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:53,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943474602] [2021-11-22 20:16:53,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:53,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 20:16:53,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:53,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943474602] [2021-11-22 20:16:53,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943474602] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:53,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:53,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 20:16:53,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039589326] [2021-11-22 20:16:53,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:53,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 20:16:53,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:53,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 20:16:53,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-22 20:16:53,211 INFO L87 Difference]: Start difference. First operand 458 states and 519 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:53,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:53,345 INFO L93 Difference]: Finished difference Result 621 states and 692 transitions. [2021-11-22 20:16:53,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 20:16:53,346 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-22 20:16:53,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:53,348 INFO L225 Difference]: With dead ends: 621 [2021-11-22 20:16:53,348 INFO L226 Difference]: Without dead ends: 613 [2021-11-22 20:16:53,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-22 20:16:53,349 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 145 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:53,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 583 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 20:16:53,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-11-22 20:16:53,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 436. [2021-11-22 20:16:53,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 432 states have (on average 1.1365740740740742) internal successors, (491), 435 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:53,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 491 transitions. [2021-11-22 20:16:53,403 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 491 transitions. Word has length 80 [2021-11-22 20:16:53,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:53,403 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 491 transitions. [2021-11-22 20:16:53,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:53,403 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 491 transitions. [2021-11-22 20:16:53,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-22 20:16:53,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:53,405 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:16:53,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-22 20:16:53,405 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:53,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:53,405 INFO L85 PathProgramCache]: Analyzing trace with hash -2125213321, now seen corresponding path program 1 times [2021-11-22 20:16:53,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:53,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499330065] [2021-11-22 20:16:53,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:53,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-22 20:16:53,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:53,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499330065] [2021-11-22 20:16:53,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499330065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:53,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:53,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 20:16:53,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265526972] [2021-11-22 20:16:53,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:53,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 20:16:53,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:53,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 20:16:53,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-22 20:16:53,493 INFO L87 Difference]: Start difference. First operand 436 states and 491 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:53,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:53,613 INFO L93 Difference]: Finished difference Result 816 states and 918 transitions. [2021-11-22 20:16:53,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 20:16:53,614 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-22 20:16:53,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:53,616 INFO L225 Difference]: With dead ends: 816 [2021-11-22 20:16:53,616 INFO L226 Difference]: Without dead ends: 504 [2021-11-22 20:16:53,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-22 20:16:53,617 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 114 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:53,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 616 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 20:16:53,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-11-22 20:16:53,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 416. [2021-11-22 20:16:53,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 412 states have (on average 1.1310679611650485) internal successors, (466), 415 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:53,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 466 transitions. [2021-11-22 20:16:53,672 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 466 transitions. Word has length 81 [2021-11-22 20:16:53,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:53,672 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 466 transitions. [2021-11-22 20:16:53,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:53,673 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 466 transitions. [2021-11-22 20:16:53,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-22 20:16:53,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:53,674 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:16:53,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-22 20:16:53,675 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:53,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:53,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1542092017, now seen corresponding path program 1 times [2021-11-22 20:16:53,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:53,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894027022] [2021-11-22 20:16:53,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:53,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 20:16:53,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:53,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894027022] [2021-11-22 20:16:53,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894027022] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:53,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:53,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 20:16:53,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62189292] [2021-11-22 20:16:53,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:53,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 20:16:53,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:53,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 20:16:53,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 20:16:53,757 INFO L87 Difference]: Start difference. First operand 416 states and 466 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:53,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:53,865 INFO L93 Difference]: Finished difference Result 416 states and 466 transitions. [2021-11-22 20:16:53,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 20:16:53,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-22 20:16:53,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:53,867 INFO L225 Difference]: With dead ends: 416 [2021-11-22 20:16:53,867 INFO L226 Difference]: Without dead ends: 414 [2021-11-22 20:16:53,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 20:16:53,869 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 43 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:53,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 239 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 20:16:53,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-22 20:16:53,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 414. [2021-11-22 20:16:53,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 411 states have (on average 1.1240875912408759) internal successors, (462), 413 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:53,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 462 transitions. [2021-11-22 20:16:53,939 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 462 transitions. Word has length 82 [2021-11-22 20:16:53,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:53,940 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 462 transitions. [2021-11-22 20:16:53,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:53,940 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 462 transitions. [2021-11-22 20:16:53,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-22 20:16:53,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:53,941 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-22 20:16:53,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-22 20:16:53,941 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:53,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:53,942 INFO L85 PathProgramCache]: Analyzing trace with hash -2020481890, now seen corresponding path program 2 times [2021-11-22 20:16:53,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:53,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5649634] [2021-11-22 20:16:53,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:53,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 20:16:54,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:54,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5649634] [2021-11-22 20:16:54,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5649634] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:16:54,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818458505] [2021-11-22 20:16:54,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 20:16:54,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:16:54,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:16:54,119 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) [2021-11-22 20:16:54,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 20:16:54,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-22 20:16:54,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 20:16:54,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-22 20:16:54,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:16:54,362 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 20:16:54,362 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 19 treesize of output 24 [2021-11-22 20:16:54,370 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 20:16:54,370 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 19 treesize of output 24 [2021-11-22 20:16:54,929 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 35 treesize of output 27 [2021-11-22 20:16:54,931 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 27 treesize of output 19 [2021-11-22 20:16:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-22 20:16:54,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 20:16:54,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818458505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:54,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 20:16:54,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [12] total 21 [2021-11-22 20:16:54,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047066577] [2021-11-22 20:16:54,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:54,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-22 20:16:54,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:54,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-22 20:16:54,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-11-22 20:16:54,955 INFO L87 Difference]: Start difference. First operand 414 states and 462 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:55,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:55,549 INFO L93 Difference]: Finished difference Result 483 states and 538 transitions. [2021-11-22 20:16:55,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 20:16:55,549 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-22 20:16:55,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:55,550 INFO L225 Difference]: With dead ends: 483 [2021-11-22 20:16:55,550 INFO L226 Difference]: Without dead ends: 404 [2021-11-22 20:16:55,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2021-11-22 20:16:55,551 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 492 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:55,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 417 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 20:16:55,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-11-22 20:16:55,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 404. [2021-11-22 20:16:55,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 401 states have (on average 1.1221945137157108) internal successors, (450), 403 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:55,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 450 transitions. [2021-11-22 20:16:55,599 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 450 transitions. Word has length 83 [2021-11-22 20:16:55,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:55,599 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 450 transitions. [2021-11-22 20:16:55,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:55,600 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 450 transitions. [2021-11-22 20:16:55,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-22 20:16:55,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:55,601 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:16:55,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 20:16:55,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:16:55,825 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:55,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:55,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1488938402, now seen corresponding path program 1 times [2021-11-22 20:16:55,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:55,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548988231] [2021-11-22 20:16:55,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:55,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 20:16:55,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:55,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548988231] [2021-11-22 20:16:55,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548988231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:16:55,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:16:55,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 20:16:55,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213681324] [2021-11-22 20:16:55,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:16:55,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 20:16:55,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:55,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 20:16:55,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-22 20:16:55,996 INFO L87 Difference]: Start difference. First operand 404 states and 450 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:56,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:16:56,168 INFO L93 Difference]: Finished difference Result 404 states and 450 transitions. [2021-11-22 20:16:56,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 20:16:56,169 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-22 20:16:56,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:16:56,170 INFO L225 Difference]: With dead ends: 404 [2021-11-22 20:16:56,171 INFO L226 Difference]: Without dead ends: 402 [2021-11-22 20:16:56,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-22 20:16:56,172 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 134 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 20:16:56,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 329 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 20:16:56,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-22 20:16:56,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2021-11-22 20:16:56,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 400 states have (on average 1.115) internal successors, (446), 401 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:56,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 446 transitions. [2021-11-22 20:16:56,223 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 446 transitions. Word has length 85 [2021-11-22 20:16:56,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:16:56,224 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 446 transitions. [2021-11-22 20:16:56,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:16:56,224 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 446 transitions. [2021-11-22 20:16:56,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-22 20:16:56,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:16:56,225 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:16:56,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-22 20:16:56,227 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:16:56,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:16:56,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1748357123, now seen corresponding path program 1 times [2021-11-22 20:16:56,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:16:56,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006896742] [2021-11-22 20:16:56,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:56,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:16:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 20:16:56,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:16:56,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006896742] [2021-11-22 20:16:56,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006896742] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:16:56,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903640012] [2021-11-22 20:16:56,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:16:56,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:16:56,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:16:56,692 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 20:16:56,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 20:16:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:16:56,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-22 20:16:56,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:16:56,947 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 20:16:56,948 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 19 treesize of output 24 [2021-11-22 20:16:56,958 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 20:16:56,959 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 19 treesize of output 24 [2021-11-22 20:16:58,108 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-22 20:16:58,108 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 64 [2021-11-22 20:16:58,116 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-11-22 20:16:58,117 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 26 [2021-11-22 20:16:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 20:16:58,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:16:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 20:16:58,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903640012] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 20:16:58,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 20:16:58,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 16] total 40 [2021-11-22 20:16:58,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388913681] [2021-11-22 20:16:58,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 20:16:58,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-22 20:16:58,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:16:58,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-22 20:16:58,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1414, Unknown=0, NotChecked=0, Total=1560 [2021-11-22 20:16:58,754 INFO L87 Difference]: Start difference. First operand 402 states and 446 transitions. Second operand has 40 states, 40 states have (on average 4.7) internal successors, (188), 40 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:17:02,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:17:02,065 INFO L93 Difference]: Finished difference Result 569 states and 628 transitions. [2021-11-22 20:17:02,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-22 20:17:02,066 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.7) internal successors, (188), 40 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-22 20:17:02,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:17:02,068 INFO L225 Difference]: With dead ends: 569 [2021-11-22 20:17:02,068 INFO L226 Difference]: Without dead ends: 506 [2021-11-22 20:17:02,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1966 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1067, Invalid=6073, Unknown=0, NotChecked=0, Total=7140 [2021-11-22 20:17:02,070 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 881 mSDsluCounter, 1867 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 1954 SdHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-22 20:17:02,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 1954 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1673 Invalid, 0 Unknown, 112 Unchecked, 0.9s Time] [2021-11-22 20:17:02,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-11-22 20:17:02,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 407. [2021-11-22 20:17:02,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 405 states have (on average 1.1160493827160494) internal successors, (452), 406 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:17:02,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 452 transitions. [2021-11-22 20:17:02,126 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 452 transitions. Word has length 85 [2021-11-22 20:17:02,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:17:02,127 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 452 transitions. [2021-11-22 20:17:02,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.7) internal successors, (188), 40 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:17:02,127 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 452 transitions. [2021-11-22 20:17:02,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-22 20:17:02,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:17:02,128 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:17:02,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 20:17:02,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-22 20:17:02,343 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:17:02,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:17:02,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1737263547, now seen corresponding path program 1 times [2021-11-22 20:17:02,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:17:02,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743361995] [2021-11-22 20:17:02,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:17:02,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:17:02,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:17:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 20:17:02,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:17:02,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743361995] [2021-11-22 20:17:02,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743361995] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:17:02,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475487621] [2021-11-22 20:17:02,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:17:02,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:17:02,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:17:02,648 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 20:17:02,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 20:17:02,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:17:02,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-22 20:17:02,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:17:02,912 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 20:17:02,912 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 19 treesize of output 24 [2021-11-22 20:17:02,922 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 20:17:02,922 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 19 treesize of output 24 [2021-11-22 20:17:03,565 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 15 treesize of output 7 [2021-11-22 20:17:03,569 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 9 [2021-11-22 20:17:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 20:17:03,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:17:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 20:17:04,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475487621] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 20:17:04,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 20:17:04,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 12] total 29 [2021-11-22 20:17:04,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804150947] [2021-11-22 20:17:04,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 20:17:04,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-22 20:17:04,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:17:04,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-22 20:17:04,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-11-22 20:17:04,138 INFO L87 Difference]: Start difference. First operand 407 states and 452 transitions. Second operand has 29 states, 29 states have (on average 6.379310344827586) internal successors, (185), 29 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:17:05,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:17:05,450 INFO L93 Difference]: Finished difference Result 571 states and 625 transitions. [2021-11-22 20:17:05,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-22 20:17:05,450 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.379310344827586) internal successors, (185), 29 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-22 20:17:05,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:17:05,451 INFO L225 Difference]: With dead ends: 571 [2021-11-22 20:17:05,451 INFO L226 Difference]: Without dead ends: 396 [2021-11-22 20:17:05,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 151 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=580, Invalid=2176, Unknown=0, NotChecked=0, Total=2756 [2021-11-22 20:17:05,453 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 1687 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1687 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 20:17:05,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1687 Valid, 911 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-22 20:17:05,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-22 20:17:05,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 284. [2021-11-22 20:17:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 282 states have (on average 1.127659574468085) internal successors, (318), 283 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:17:05,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 318 transitions. [2021-11-22 20:17:05,509 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 318 transitions. Word has length 85 [2021-11-22 20:17:05,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:17:05,509 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 318 transitions. [2021-11-22 20:17:05,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.379310344827586) internal successors, (185), 29 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:17:05,510 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 318 transitions. [2021-11-22 20:17:05,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-22 20:17:05,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:17:05,511 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:17:05,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 20:17:05,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:17:05,735 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:17:05,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:17:05,736 INFO L85 PathProgramCache]: Analyzing trace with hash -725842291, now seen corresponding path program 2 times [2021-11-22 20:17:05,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:17:05,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187616312] [2021-11-22 20:17:05,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:17:05,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:17:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:17:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-22 20:17:05,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:17:05,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187616312] [2021-11-22 20:17:05,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187616312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:17:05,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857150777] [2021-11-22 20:17:05,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 20:17:05,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:17:05,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:17:05,939 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 20:17:05,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 20:17:06,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-22 20:17:06,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 20:17:06,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-22 20:17:06,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:17:06,168 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 20:17:06,168 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 19 treesize of output 24 [2021-11-22 20:17:06,176 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 20:17:06,176 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 19 treesize of output 24 [2021-11-22 20:17:06,883 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 35 treesize of output 27 [2021-11-22 20:17:06,885 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 27 treesize of output 19 [2021-11-22 20:17:06,908 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-22 20:17:06,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 20:17:06,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857150777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:17:06,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 20:17:06,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [14] total 25 [2021-11-22 20:17:06,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160789920] [2021-11-22 20:17:06,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:17:06,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 20:17:06,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:17:06,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 20:17:06,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-11-22 20:17:06,911 INFO L87 Difference]: Start difference. First operand 284 states and 318 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:17:08,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:17:08,523 INFO L93 Difference]: Finished difference Result 557 states and 620 transitions. [2021-11-22 20:17:08,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-22 20:17:08,524 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-22 20:17:08,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:17:08,525 INFO L225 Difference]: With dead ends: 557 [2021-11-22 20:17:08,525 INFO L226 Difference]: Without dead ends: 313 [2021-11-22 20:17:08,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=630, Invalid=2126, Unknown=0, NotChecked=0, Total=2756 [2021-11-22 20:17:08,526 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 865 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 20:17:08,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 414 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 20:17:08,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-22 20:17:08,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 281. [2021-11-22 20:17:08,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 279 states have (on average 1.096774193548387) internal successors, (306), 280 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:17:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 306 transitions. [2021-11-22 20:17:08,567 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 306 transitions. Word has length 93 [2021-11-22 20:17:08,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:17:08,568 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 306 transitions. [2021-11-22 20:17:08,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:17:08,568 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 306 transitions. [2021-11-22 20:17:08,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-22 20:17:08,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:17:08,569 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:17:08,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-22 20:17:08,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-22 20:17:08,779 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:17:08,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:17:08,780 INFO L85 PathProgramCache]: Analyzing trace with hash -86539151, now seen corresponding path program 2 times [2021-11-22 20:17:08,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:17:08,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190327893] [2021-11-22 20:17:08,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:17:08,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:17:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:17:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:17:09,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:17:09,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190327893] [2021-11-22 20:17:09,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190327893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:17:09,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170572968] [2021-11-22 20:17:09,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 20:17:09,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:17:09,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:17:09,857 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 20:17:09,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 20:17:10,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 20:17:10,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 20:17:10,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 149 conjunts are in the unsatisfiable core [2021-11-22 20:17:10,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:17:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-22 20:17:11,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:17:12,820 INFO L354 Elim1Store]: treesize reduction 8, result has 91.2 percent of original size [2021-11-22 20:17:12,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 130 [2021-11-22 20:17:13,157 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-22 20:17:13,157 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 28 treesize of output 18 [2021-11-22 20:17:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 20:17:13,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170572968] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 20:17:13,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 20:17:13,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 27, 23] total 75 [2021-11-22 20:17:13,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899455373] [2021-11-22 20:17:13,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 20:17:13,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-22 20:17:13,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:17:13,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-22 20:17:13,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=5269, Unknown=0, NotChecked=0, Total=5550 [2021-11-22 20:17:13,385 INFO L87 Difference]: Start difference. First operand 281 states and 306 transitions. Second operand has 75 states, 75 states have (on average 3.453333333333333) internal successors, (259), 75 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:17:28,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:17:28,847 INFO L93 Difference]: Finished difference Result 1430 states and 1556 transitions. [2021-11-22 20:17:28,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-22 20:17:28,848 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.453333333333333) internal successors, (259), 75 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-22 20:17:28,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:17:28,851 INFO L225 Difference]: With dead ends: 1430 [2021-11-22 20:17:28,851 INFO L226 Difference]: Without dead ends: 1387 [2021-11-22 20:17:28,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5226 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=4725, Invalid=22997, Unknown=0, NotChecked=0, Total=27722 [2021-11-22 20:17:28,854 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 9270 mSDsluCounter, 3556 mSDsCounter, 0 mSdLazyCounter, 6177 mSolverCounterSat, 1846 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9270 SdHoareTripleChecker+Valid, 3652 SdHoareTripleChecker+Invalid, 8249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1846 IncrementalHoareTripleChecker+Valid, 6177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-22 20:17:28,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9270 Valid, 3652 Invalid, 8249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1846 Valid, 6177 Invalid, 0 Unknown, 226 Unchecked, 3.5s Time] [2021-11-22 20:17:28,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2021-11-22 20:17:28,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 155. [2021-11-22 20:17:28,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 153 states have (on average 1.0980392156862746) internal successors, (168), 154 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:17:28,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 168 transitions. [2021-11-22 20:17:28,883 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 168 transitions. Word has length 95 [2021-11-22 20:17:28,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:17:28,883 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 168 transitions. [2021-11-22 20:17:28,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.453333333333333) internal successors, (259), 75 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:17:28,883 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 168 transitions. [2021-11-22 20:17:28,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-22 20:17:28,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:17:28,884 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:17:28,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-22 20:17:29,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-22 20:17:29,087 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 20:17:29,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:17:29,088 INFO L85 PathProgramCache]: Analyzing trace with hash 125531425, now seen corresponding path program 2 times [2021-11-22 20:17:29,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:17:29,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49238807] [2021-11-22 20:17:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:17:29,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:17:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:17:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-22 20:17:29,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:17:29,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49238807] [2021-11-22 20:17:29,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49238807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:17:29,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187068374] [2021-11-22 20:17:29,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 20:17:29,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:17:29,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:17:29,356 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 20:17:29,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-22 20:17:29,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 20:17:29,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 20:17:29,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-22 20:17:29,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:17:29,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:17:29,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-22 20:17:29,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:17:29,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-22 20:17:30,469 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 7 [2021-11-22 20:17:30,605 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-22 20:17:30,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 16 [2021-11-22 20:17:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-22 20:17:30,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:17:31,238 INFO L354 Elim1Store]: treesize reduction 255, result has 67.7 percent of original size [2021-11-22 20:17:31,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 1895 treesize of output 1820 [2021-11-22 20:17:31,287 INFO L354 Elim1Store]: treesize reduction 17, result has 63.0 percent of original size [2021-11-22 20:17:31,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 4053 treesize of output 3361 [2021-11-22 20:17:31,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 20:17:31,332 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 3361 treesize of output 3261 [2021-11-22 20:17:31,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 20:17:31,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 3261 treesize of output 3162 [2021-11-22 20:17:31,532 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 3186 treesize of output 3126 [2021-11-22 20:17:31,694 INFO L354 Elim1Store]: treesize reduction 10, result has 91.5 percent of original size [2021-11-22 20:17:31,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 3126 treesize of output 3064 [2021-11-22 20:19:21,740 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 8 treesize of output 6 [2021-11-22 20:19:21,900 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 [2021-11-22 20:19:22,909 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 6 [2021-11-22 20:19:23,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 20:19:23,287 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 34 treesize of output 38 [2021-11-22 20:19:23,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 20:19:23,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 7 treesize of output 5 [2021-11-22 20:19:23,645 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 102 treesize of output 92 [2021-11-22 20:19:24,704 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 6 [2021-11-22 20:19:24,749 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 74 treesize of output 66 Killed by 15