./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5f08f0f0 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_end_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 a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5f08f0f [2021-11-05 13:13:13,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-05 13:13:13,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-05 13:13:13,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-05 13:13:13,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-05 13:13:13,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-05 13:13:13,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-05 13:13:13,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-05 13:13:13,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-05 13:13:13,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-05 13:13:13,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-05 13:13:13,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-05 13:13:13,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-05 13:13:13,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-05 13:13:13,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-05 13:13:13,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-05 13:13:13,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-05 13:13:13,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-05 13:13:13,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-05 13:13:13,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-05 13:13:13,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-05 13:13:13,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-05 13:13:13,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-05 13:13:13,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-05 13:13:13,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-05 13:13:13,924 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-05 13:13:13,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-05 13:13:13,925 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-05 13:13:13,925 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-05 13:13:13,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-05 13:13:13,925 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-05 13:13:13,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-05 13:13:13,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-05 13:13:13,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-05 13:13:13,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-05 13:13:13,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-05 13:13:13,928 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-05 13:13:13,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-05 13:13:13,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-05 13:13:13,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-05 13:13:13,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-05 13:13:13,931 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-05 13:13:13,950 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-05 13:13:13,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-05 13:13:13,951 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-05 13:13:13,951 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-05 13:13:13,952 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-05 13:13:13,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-05 13:13:13,953 INFO L138 SettingsManager]: * Use SBE=true [2021-11-05 13:13:13,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-05 13:13:13,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-05 13:13:13,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-05 13:13:13,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-05 13:13:13,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-05 13:13:13,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-05 13:13:13,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-05 13:13:13,955 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-05 13:13:13,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-05 13:13:13,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-05 13:13:13,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-05 13:13:13,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-05 13:13:13,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 13:13:13,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-05 13:13:13,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-05 13:13:13,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-05 13:13:13,956 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-05 13:13:13,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-05 13:13:13,967 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-05 13:13:13,967 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-05 13:13:13,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-05 13:13:13,968 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-05 13:13:13,968 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 [2021-11-05 13:13:14,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-05 13:13:14,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-05 13:13:14,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-05 13:13:14,228 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-05 13:13:14,229 INFO L275 PluginConnector]: CDTParser initialized [2021-11-05 13:13:14,230 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2021-11-05 13:13:14,271 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04a46c374/e1b04289c0c549e6b8f7316c9a8d664c/FLAG6ab988da6 [2021-11-05 13:13:14,872 INFO L306 CDTParser]: Found 1 translation units. [2021-11-05 13:13:14,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2021-11-05 13:13:14,900 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04a46c374/e1b04289c0c549e6b8f7316c9a8d664c/FLAG6ab988da6 [2021-11-05 13:13:15,309 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04a46c374/e1b04289c0c549e6b8f7316c9a8d664c [2021-11-05 13:13:15,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-05 13:13:15,312 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-05 13:13:15,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-05 13:13:15,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-05 13:13:15,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-05 13:13:15,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 01:13:15" (1/1) ... [2021-11-05 13:13:15,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@676a4e80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:13:15, skipping insertion in model container [2021-11-05 13:13:15,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 01:13:15" (1/1) ... [2021-11-05 13:13:15,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-05 13:13:15,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-05 13:13:15,574 WARN L228 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_end_harness.i[4493,4506] [2021-11-05 13:13:15,583 WARN L228 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_end_harness.i[4553,4566] [2021-11-05 13:13:15,598 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-05 13:13:15,602 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-05 13:13:16,006 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,007 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,007 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,007 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,008 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,015 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,016 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,018 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,019 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,021 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,022 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,023 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,023 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,202 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-05 13:13:16,206 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-05 13:13:16,208 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-05 13:13:16,209 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-05 13:13:16,210 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-05 13:13:16,210 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-05 13:13:16,211 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-05 13:13:16,211 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-05 13:13:16,215 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-05 13:13:16,216 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-05 13:13:16,287 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-05 13:13:16,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 13:13:16,326 INFO L203 MainTranslator]: Completed pre-run [2021-11-05 13:13:16,334 WARN L228 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_end_harness.i[4493,4506] [2021-11-05 13:13:16,337 WARN L228 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_end_harness.i[4553,4566] [2021-11-05 13:13:16,339 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-05 13:13:16,340 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-05 13:13:16,381 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,382 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,383 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,384 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,386 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,389 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,394 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,395 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,395 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,396 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,397 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,397 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,397 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 13:13:16,427 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-05 13:13:16,428 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-05 13:13:16,429 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-05 13:13:16,429 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-05 13:13:16,433 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-05 13:13:16,434 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-05 13:13:16,434 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-05 13:13:16,435 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-05 13:13:16,435 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-05 13:13:16,435 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-05 13:13:16,457 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-05 13:13:16,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 13:13:16,621 INFO L208 MainTranslator]: Completed translation [2021-11-05 13:13:16,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:13:16 WrapperNode [2021-11-05 13:13:16,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-05 13:13:16,623 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-05 13:13:16,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-05 13:13:16,623 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-05 13:13:16,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:13:16" (1/1) ... [2021-11-05 13:13:16,679 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:13:16" (1/1) ... [2021-11-05 13:13:16,719 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-05 13:13:16,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-05 13:13:16,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-05 13:13:16,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-05 13:13:16,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:13:16" (1/1) ... [2021-11-05 13:13:16,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:13:16" (1/1) ... [2021-11-05 13:13:16,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:13:16" (1/1) ... [2021-11-05 13:13:16,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:13:16" (1/1) ... [2021-11-05 13:13:16,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:13:16" (1/1) ... [2021-11-05 13:13:16,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:13:16" (1/1) ... [2021-11-05 13:13:16,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:13:16" (1/1) ... [2021-11-05 13:13:16,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-05 13:13:16,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-05 13:13:16,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-05 13:13:16,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-05 13:13:16,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:13:16" (1/1) ... [2021-11-05 13:13:16,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 13:13:16,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:13:16,777 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) [2021-11-05 13:13:16,799 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 [2021-11-05 13:13:16,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-05 13:13:16,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-05 13:13:16,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-05 13:13:16,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-05 13:13:16,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-05 13:13:16,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-05 13:13:16,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-05 13:13:16,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-05 13:13:16,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-05 13:13:17,277 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-05 13:13:17,277 INFO L299 CfgBuilder]: Removed 55 assume(true) statements. [2021-11-05 13:13:17,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 01:13:17 BoogieIcfgContainer [2021-11-05 13:13:17,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-05 13:13:17,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-05 13:13:17,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-05 13:13:17,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-05 13:13:17,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.11 01:13:15" (1/3) ... [2021-11-05 13:13:17,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c270bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 01:13:17, skipping insertion in model container [2021-11-05 13:13:17,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 01:13:16" (2/3) ... [2021-11-05 13:13:17,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c270bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 01:13:17, skipping insertion in model container [2021-11-05 13:13:17,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 01:13:17" (3/3) ... [2021-11-05 13:13:17,284 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_end_harness.i [2021-11-05 13:13:17,287 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-05 13:13:17,287 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-05 13:13:17,314 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-05 13:13:17,318 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 [2021-11-05 13:13:17,321 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-05 13:13:17,341 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) [2021-11-05 13:13:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-05 13:13:17,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:13:17,345 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] [2021-11-05 13:13:17,346 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)] === [2021-11-05 13:13:17,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:13:17,349 INFO L85 PathProgramCache]: Analyzing trace with hash -122732205, now seen corresponding path program 1 times [2021-11-05 13:13:17,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:13:17,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843765683] [2021-11-05 13:13:17,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:13:17,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:13:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:13:17,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:13:17,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:13:17,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843765683] [2021-11-05 13:13:17,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843765683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:13:17,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:13:17,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-05 13:13:17,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181959147] [2021-11-05 13:13:17,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:13:17,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-05 13:13:17,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:13:17,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-05 13:13:17,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-05 13:13:17,553 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) [2021-11-05 13:13:17,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:13:17,581 INFO L93 Difference]: Finished difference Result 224 states and 335 transitions. [2021-11-05 13:13:17,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-05 13:13:17,583 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 [2021-11-05 13:13:17,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:13:17,589 INFO L225 Difference]: With dead ends: 224 [2021-11-05 13:13:17,590 INFO L226 Difference]: Without dead ends: 109 [2021-11-05 13:13:17,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.02ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-05 13:13:17,596 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.42ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-05 13:13:17,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 3.42ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-05 13:13:17,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-05 13:13:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-05 13:13:17,626 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) [2021-11-05 13:13:17,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 153 transitions. [2021-11-05 13:13:17,631 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 153 transitions. Word has length 41 [2021-11-05 13:13:17,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:13:17,648 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 153 transitions. [2021-11-05 13:13:17,649 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) [2021-11-05 13:13:17,649 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 153 transitions. [2021-11-05 13:13:17,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-05 13:13:17,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:13:17,650 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] [2021-11-05 13:13:17,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-05 13:13:17,650 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)] === [2021-11-05 13:13:17,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:13:17,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1738897517, now seen corresponding path program 1 times [2021-11-05 13:13:17,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:13:17,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653572002] [2021-11-05 13:13:17,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:13:17,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:13:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:13:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:13:17,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:13:17,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653572002] [2021-11-05 13:13:17,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653572002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:13:17,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:13:17,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 13:13:17,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134191457] [2021-11-05 13:13:17,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:13:17,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 13:13:17,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:13:17,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 13:13:17,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 13:13:17,739 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) [2021-11-05 13:13:17,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:13:17,851 INFO L93 Difference]: Finished difference Result 254 states and 367 transitions. [2021-11-05 13:13:17,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 13:13:17,852 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 [2021-11-05 13:13:17,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:13:17,854 INFO L225 Difference]: With dead ends: 254 [2021-11-05 13:13:17,855 INFO L226 Difference]: Without dead ends: 157 [2021-11-05 13:13:17,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.38ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 13:13:17,857 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 63 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.96ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.21ms IncrementalHoareTripleChecker+Time [2021-11-05 13:13:17,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 466 Invalid, 100 Unknown, 0 Unchecked, 3.96ms Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 84.21ms Time] [2021-11-05 13:13:17,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-05 13:13:17,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 117. [2021-11-05 13:13:17,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 113 states have (on average 1.424778761061947) internal successors, (161), 116 states have internal predecessors, (161), 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) [2021-11-05 13:13:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 161 transitions. [2021-11-05 13:13:17,868 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 161 transitions. Word has length 41 [2021-11-05 13:13:17,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:13:17,868 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 161 transitions. [2021-11-05 13:13:17,868 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) [2021-11-05 13:13:17,869 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 161 transitions. [2021-11-05 13:13:17,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-05 13:13:17,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:13:17,871 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] [2021-11-05 13:13:17,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-05 13:13:17,872 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)] === [2021-11-05 13:13:17,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:13:17,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1037297643, now seen corresponding path program 1 times [2021-11-05 13:13:17,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:13:17,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17403126] [2021-11-05 13:13:17,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:13:17,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:13:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:13:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:13:17,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:13:17,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17403126] [2021-11-05 13:13:17,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17403126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:13:17,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:13:17,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 13:13:17,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031044257] [2021-11-05 13:13:17,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:13:17,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 13:13:17,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:13:17,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 13:13:17,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 13:13:17,933 INFO L87 Difference]: Start difference. First operand 117 states and 161 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) [2021-11-05 13:13:18,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:13:18,005 INFO L93 Difference]: Finished difference Result 250 states and 354 transitions. [2021-11-05 13:13:18,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 13:13:18,006 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 [2021-11-05 13:13:18,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:13:18,009 INFO L225 Difference]: With dead ends: 250 [2021-11-05 13:13:18,009 INFO L226 Difference]: Without dead ends: 149 [2021-11-05 13:13:18,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.18ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 13:13:18,013 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 36 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.58ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.57ms IncrementalHoareTripleChecker+Time [2021-11-05 13:13:18,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 432 Invalid, 104 Unknown, 0 Unchecked, 1.58ms Time], IncrementalHoareTripleChecker [13 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 57.57ms Time] [2021-11-05 13:13:18,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-05 13:13:18,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 125. [2021-11-05 13:13:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 121 states have (on average 1.396694214876033) internal successors, (169), 124 states have internal predecessors, (169), 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) [2021-11-05 13:13:18,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 169 transitions. [2021-11-05 13:13:18,019 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 169 transitions. Word has length 41 [2021-11-05 13:13:18,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:13:18,020 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 169 transitions. [2021-11-05 13:13:18,020 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) [2021-11-05 13:13:18,020 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 169 transitions. [2021-11-05 13:13:18,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-05 13:13:18,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:13:18,021 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] [2021-11-05 13:13:18,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-05 13:13:18,021 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)] === [2021-11-05 13:13:18,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:13:18,021 INFO L85 PathProgramCache]: Analyzing trace with hash 348905751, now seen corresponding path program 1 times [2021-11-05 13:13:18,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:13:18,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890568520] [2021-11-05 13:13:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:13:18,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:13:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:13:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:13:18,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:13:18,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890568520] [2021-11-05 13:13:18,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890568520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:13:18,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:13:18,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 13:13:18,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790398687] [2021-11-05 13:13:18,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:13:18,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 13:13:18,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:13:18,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 13:13:18,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 13:13:18,109 INFO L87 Difference]: Start difference. First operand 125 states and 169 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) [2021-11-05 13:13:18,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:13:18,155 INFO L93 Difference]: Finished difference Result 230 states and 314 transitions. [2021-11-05 13:13:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 13:13:18,155 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 [2021-11-05 13:13:18,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:13:18,156 INFO L225 Difference]: With dead ends: 230 [2021-11-05 13:13:18,156 INFO L226 Difference]: Without dead ends: 119 [2021-11-05 13:13:18,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.65ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 13:13:18,157 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 140 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.73ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.32ms IncrementalHoareTripleChecker+Time [2021-11-05 13:13:18,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 270 Invalid, 34 Unknown, 0 Unchecked, 0.73ms Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 40.32ms Time] [2021-11-05 13:13:18,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-05 13:13:18,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-11-05 13:13:18,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 115 states have (on average 1.391304347826087) internal successors, (160), 118 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) [2021-11-05 13:13:18,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2021-11-05 13:13:18,162 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 41 [2021-11-05 13:13:18,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:13:18,162 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2021-11-05 13:13:18,163 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) [2021-11-05 13:13:18,163 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2021-11-05 13:13:18,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-05 13:13:18,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:13:18,171 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] [2021-11-05 13:13:18,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-05 13:13:18,172 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)] === [2021-11-05 13:13:18,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:13:18,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1666510959, now seen corresponding path program 1 times [2021-11-05 13:13:18,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:13:18,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302472218] [2021-11-05 13:13:18,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:13:18,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:13:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:13:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:13:18,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:13:18,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302472218] [2021-11-05 13:13:18,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302472218] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:13:18,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:13:18,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 13:13:18,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191711624] [2021-11-05 13:13:18,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:13:18,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 13:13:18,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:13:18,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 13:13:18,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 13:13:18,241 INFO L87 Difference]: Start difference. First operand 119 states and 160 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) [2021-11-05 13:13:18,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:13:18,283 INFO L93 Difference]: Finished difference Result 228 states and 298 transitions. [2021-11-05 13:13:18,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 13:13:18,284 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 [2021-11-05 13:13:18,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:13:18,284 INFO L225 Difference]: With dead ends: 228 [2021-11-05 13:13:18,284 INFO L226 Difference]: Without dead ends: 137 [2021-11-05 13:13:18,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.73ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 13:13:18,285 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 18 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.51ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.02ms IncrementalHoareTripleChecker+Time [2021-11-05 13:13:18,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 422 Invalid, 29 Unknown, 0 Unchecked, 0.51ms Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 34.02ms Time] [2021-11-05 13:13:18,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-05 13:13:18,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 119. [2021-11-05 13:13:18,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 115 states have (on average 1.373913043478261) internal successors, (158), 118 states have internal predecessors, (158), 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) [2021-11-05 13:13:18,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 158 transitions. [2021-11-05 13:13:18,290 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 158 transitions. Word has length 41 [2021-11-05 13:13:18,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:13:18,290 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 158 transitions. [2021-11-05 13:13:18,291 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) [2021-11-05 13:13:18,291 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 158 transitions. [2021-11-05 13:13:18,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-05 13:13:18,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:13:18,291 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] [2021-11-05 13:13:18,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-05 13:13:18,291 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)] === [2021-11-05 13:13:18,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:13:18,292 INFO L85 PathProgramCache]: Analyzing trace with hash -423042159, now seen corresponding path program 1 times [2021-11-05 13:13:18,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:13:18,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990792297] [2021-11-05 13:13:18,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:13:18,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:13:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:13:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:13:18,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:13:18,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990792297] [2021-11-05 13:13:18,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990792297] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:13:18,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:13:18,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-05 13:13:18,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547597197] [2021-11-05 13:13:18,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:13:18,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-05 13:13:18,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:13:18,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-05 13:13:18,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-05 13:13:18,396 INFO L87 Difference]: Start difference. First operand 119 states and 158 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 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) [2021-11-05 13:13:18,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:13:18,506 INFO L93 Difference]: Finished difference Result 242 states and 315 transitions. [2021-11-05 13:13:18,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-05 13:13:18,506 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 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 [2021-11-05 13:13:18,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:13:18,507 INFO L225 Difference]: With dead ends: 242 [2021-11-05 13:13:18,507 INFO L226 Difference]: Without dead ends: 152 [2021-11-05 13:13:18,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 42.96ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-05 13:13:18,510 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 458 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.44ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.49ms IncrementalHoareTripleChecker+Time [2021-11-05 13:13:18,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 223 Invalid, 94 Unknown, 0 Unchecked, 2.44ms Time], IncrementalHoareTripleChecker [30 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 60.49ms Time] [2021-11-05 13:13:18,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-05 13:13:18,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 119. [2021-11-05 13:13:18,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 115 states have (on average 1.3478260869565217) internal successors, (155), 118 states have internal predecessors, (155), 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) [2021-11-05 13:13:18,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 155 transitions. [2021-11-05 13:13:18,523 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 155 transitions. Word has length 45 [2021-11-05 13:13:18,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:13:18,524 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 155 transitions. [2021-11-05 13:13:18,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 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) [2021-11-05 13:13:18,524 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 155 transitions. [2021-11-05 13:13:18,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-05 13:13:18,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:13:18,525 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] [2021-11-05 13:13:18,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-05 13:13:18,525 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)] === [2021-11-05 13:13:18,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:13:18,526 INFO L85 PathProgramCache]: Analyzing trace with hash -2072078671, now seen corresponding path program 1 times [2021-11-05 13:13:18,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:13:18,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011225468] [2021-11-05 13:13:18,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:13:18,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:13:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:13:18,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:13:18,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:13:18,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011225468] [2021-11-05 13:13:18,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011225468] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:13:18,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:13:18,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-05 13:13:18,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90106794] [2021-11-05 13:13:18,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:13:18,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-05 13:13:18,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:13:18,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-05 13:13:18,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-05 13:13:18,602 INFO L87 Difference]: Start difference. First operand 119 states and 155 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 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) [2021-11-05 13:13:18,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:13:18,803 INFO L93 Difference]: Finished difference Result 334 states and 430 transitions. [2021-11-05 13:13:18,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-05 13:13:18,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 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 [2021-11-05 13:13:18,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:13:18,805 INFO L225 Difference]: With dead ends: 334 [2021-11-05 13:13:18,806 INFO L226 Difference]: Without dead ends: 243 [2021-11-05 13:13:18,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 71.46ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-11-05 13:13:18,811 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 819 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.77ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 124.78ms IncrementalHoareTripleChecker+Time [2021-11-05 13:13:18,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [819 Valid, 346 Invalid, 180 Unknown, 0 Unchecked, 2.77ms Time], IncrementalHoareTripleChecker [63 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 124.78ms Time] [2021-11-05 13:13:18,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-11-05 13:13:18,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 122. [2021-11-05 13:13:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 118 states have (on average 1.3389830508474576) internal successors, (158), 121 states have internal predecessors, (158), 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) [2021-11-05 13:13:18,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 158 transitions. [2021-11-05 13:13:18,822 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 158 transitions. Word has length 49 [2021-11-05 13:13:18,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:13:18,822 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 158 transitions. [2021-11-05 13:13:18,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 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) [2021-11-05 13:13:18,823 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 158 transitions. [2021-11-05 13:13:18,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-05 13:13:18,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:13:18,823 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] [2021-11-05 13:13:18,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-05 13:13:18,824 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)] === [2021-11-05 13:13:18,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:13:18,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1006498608, now seen corresponding path program 1 times [2021-11-05 13:13:18,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:13:18,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835128030] [2021-11-05 13:13:18,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:13:18,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:13:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:13:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:13:18,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:13:18,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835128030] [2021-11-05 13:13:18,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835128030] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:13:18,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:13:18,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-05 13:13:18,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132161717] [2021-11-05 13:13:18,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:13:18,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-05 13:13:18,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:13:18,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-05 13:13:18,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-05 13:13:18,887 INFO L87 Difference]: Start difference. First operand 122 states and 158 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) [2021-11-05 13:13:19,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:13:19,002 INFO L93 Difference]: Finished difference Result 327 states and 416 transitions. [2021-11-05 13:13:19,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-05 13:13:19,003 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 [2021-11-05 13:13:19,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:13:19,004 INFO L225 Difference]: With dead ends: 327 [2021-11-05 13:13:19,004 INFO L226 Difference]: Without dead ends: 234 [2021-11-05 13:13:19,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 33.57ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-05 13:13:19,005 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 606 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.49ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.76ms IncrementalHoareTripleChecker+Time [2021-11-05 13:13:19,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 308 Invalid, 134 Unknown, 0 Unchecked, 1.49ms Time], IncrementalHoareTripleChecker [39 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 81.76ms Time] [2021-11-05 13:13:19,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-05 13:13:19,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 125. [2021-11-05 13:13:19,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 121 states have (on average 1.3305785123966942) internal successors, (161), 124 states have internal predecessors, (161), 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) [2021-11-05 13:13:19,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 161 transitions. [2021-11-05 13:13:19,014 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 161 transitions. Word has length 51 [2021-11-05 13:13:19,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:13:19,015 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 161 transitions. [2021-11-05 13:13:19,015 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) [2021-11-05 13:13:19,015 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 161 transitions. [2021-11-05 13:13:19,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-05 13:13:19,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:13:19,015 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] [2021-11-05 13:13:19,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-05 13:13:19,016 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)] === [2021-11-05 13:13:19,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:13:19,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1179077135, now seen corresponding path program 1 times [2021-11-05 13:13:19,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:13:19,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953959747] [2021-11-05 13:13:19,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:13:19,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:13:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:13:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:13:19,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:13:19,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953959747] [2021-11-05 13:13:19,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953959747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:13:19,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:13:19,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 13:13:19,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611906270] [2021-11-05 13:13:19,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:13:19,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 13:13:19,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:13:19,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 13:13:19,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 13:13:19,062 INFO L87 Difference]: Start difference. First operand 125 states and 161 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) [2021-11-05 13:13:19,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:13:19,103 INFO L93 Difference]: Finished difference Result 244 states and 316 transitions. [2021-11-05 13:13:19,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 13:13:19,104 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 [2021-11-05 13:13:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:13:19,104 INFO L225 Difference]: With dead ends: 244 [2021-11-05 13:13:19,105 INFO L226 Difference]: Without dead ends: 141 [2021-11-05 13:13:19,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.80ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 13:13:19,105 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 9 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.69ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.82ms IncrementalHoareTripleChecker+Time [2021-11-05 13:13:19,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 392 Invalid, 72 Unknown, 0 Unchecked, 0.69ms Time], IncrementalHoareTripleChecker [13 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 32.82ms Time] [2021-11-05 13:13:19,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-05 13:13:19,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 133. [2021-11-05 13:13:19,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 129 states have (on average 1.310077519379845) internal successors, (169), 132 states have internal predecessors, (169), 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) [2021-11-05 13:13:19,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 169 transitions. [2021-11-05 13:13:19,110 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 169 transitions. Word has length 61 [2021-11-05 13:13:19,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:13:19,111 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 169 transitions. [2021-11-05 13:13:19,111 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) [2021-11-05 13:13:19,111 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 169 transitions. [2021-11-05 13:13:19,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-05 13:13:19,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:13:19,112 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] [2021-11-05 13:13:19,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-05 13:13:19,112 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)] === [2021-11-05 13:13:19,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:13:19,113 INFO L85 PathProgramCache]: Analyzing trace with hash -192730163, now seen corresponding path program 1 times [2021-11-05 13:13:19,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:13:19,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740911333] [2021-11-05 13:13:19,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:13:19,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:13:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:13:19,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:13:19,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:13:19,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740911333] [2021-11-05 13:13:19,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740911333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:13:19,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:13:19,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-05 13:13:19,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793848335] [2021-11-05 13:13:19,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:13:19,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-05 13:13:19,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:13:19,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-05 13:13:19,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-05 13:13:19,182 INFO L87 Difference]: Start difference. First operand 133 states and 169 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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) [2021-11-05 13:13:19,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:13:19,347 INFO L93 Difference]: Finished difference Result 362 states and 457 transitions. [2021-11-05 13:13:19,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-05 13:13:19,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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 [2021-11-05 13:13:19,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:13:19,349 INFO L225 Difference]: With dead ends: 362 [2021-11-05 13:13:19,349 INFO L226 Difference]: Without dead ends: 251 [2021-11-05 13:13:19,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 63.01ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-05 13:13:19,351 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 761 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.35ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 102.96ms IncrementalHoareTripleChecker+Time [2021-11-05 13:13:19,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 449 Invalid, 254 Unknown, 0 Unchecked, 2.35ms Time], IncrementalHoareTripleChecker [80 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 102.96ms Time] [2021-11-05 13:13:19,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-05 13:13:19,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 136. [2021-11-05 13:13:19,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 132 states have (on average 1.303030303030303) internal successors, (172), 135 states have internal predecessors, (172), 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) [2021-11-05 13:13:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 172 transitions. [2021-11-05 13:13:19,358 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 172 transitions. Word has length 61 [2021-11-05 13:13:19,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:13:19,359 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 172 transitions. [2021-11-05 13:13:19,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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) [2021-11-05 13:13:19,359 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 172 transitions. [2021-11-05 13:13:19,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-05 13:13:19,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:13:19,360 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] [2021-11-05 13:13:19,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-05 13:13:19,360 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)] === [2021-11-05 13:13:19,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:13:19,361 INFO L85 PathProgramCache]: Analyzing trace with hash 930930641, now seen corresponding path program 1 times [2021-11-05 13:13:19,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:13:19,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159599086] [2021-11-05 13:13:19,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:13:19,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:13:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:13:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:13:19,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:13:19,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159599086] [2021-11-05 13:13:19,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159599086] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:13:19,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:13:19,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-05 13:13:19,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776807224] [2021-11-05 13:13:19,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:13:19,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-05 13:13:19,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:13:19,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-05 13:13:19,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-05 13:13:19,422 INFO L87 Difference]: Start difference. First operand 136 states and 172 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) [2021-11-05 13:13:19,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:13:19,474 INFO L93 Difference]: Finished difference Result 289 states and 354 transitions. [2021-11-05 13:13:19,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-05 13:13:19,474 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 [2021-11-05 13:13:19,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:13:19,475 INFO L225 Difference]: With dead ends: 289 [2021-11-05 13:13:19,475 INFO L226 Difference]: Without dead ends: 184 [2021-11-05 13:13:19,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.42ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-05 13:13:19,476 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 52 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.00ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.47ms IncrementalHoareTripleChecker+Time [2021-11-05 13:13:19,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 592 Invalid, 63 Unknown, 0 Unchecked, 1.00ms Time], IncrementalHoareTripleChecker [11 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 35.47ms Time] [2021-11-05 13:13:19,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-05 13:13:19,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 136. [2021-11-05 13:13:19,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 132 states have (on average 1.2878787878787878) internal successors, (170), 135 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) [2021-11-05 13:13:19,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 170 transitions. [2021-11-05 13:13:19,481 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 170 transitions. Word has length 61 [2021-11-05 13:13:19,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:13:19,481 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 170 transitions. [2021-11-05 13:13:19,481 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) [2021-11-05 13:13:19,481 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 170 transitions. [2021-11-05 13:13:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-05 13:13:19,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:13:19,482 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] [2021-11-05 13:13:19,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-05 13:13:19,482 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)] === [2021-11-05 13:13:19,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:13:19,483 INFO L85 PathProgramCache]: Analyzing trace with hash -961072015, now seen corresponding path program 1 times [2021-11-05 13:13:19,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:13:19,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575211102] [2021-11-05 13:13:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:13:19,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:13:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:13:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-05 13:13:19,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:13:19,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575211102] [2021-11-05 13:13:19,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575211102] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:13:19,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293426932] [2021-11-05 13:13:19,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:13:19,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:13:19,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:13:19,597 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) [2021-11-05 13:13:19,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-05 13:13:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:13:19,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-05 13:13:19,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:13:19,839 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-05 13:13:19,840 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 63 treesize of output 50 [2021-11-05 13:13:19,856 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-05 13:13:19,857 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 71 treesize of output 54 [2021-11-05 13:13:20,779 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-11-05 13:13:20,780 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 89 [2021-11-05 13:13:20,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-05 13:13:20,796 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 89 [2021-11-05 13:13:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-05 13:13:20,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:13:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-05 13:13:21,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293426932] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 13:13:21,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 13:13:21,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 16 [2021-11-05 13:13:21,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306215644] [2021-11-05 13:13:21,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 13:13:21,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-05 13:13:21,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:13:21,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-05 13:13:21,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-05 13:13:21,073 INFO L87 Difference]: Start difference. First operand 136 states and 170 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) [2021-11-05 13:13:21,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:13:21,684 INFO L93 Difference]: Finished difference Result 599 states and 730 transitions. [2021-11-05 13:13:21,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-05 13:13:21,685 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 [2021-11-05 13:13:21,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:13:21,687 INFO L225 Difference]: With dead ends: 599 [2021-11-05 13:13:21,687 INFO L226 Difference]: Without dead ends: 496 [2021-11-05 13:13:21,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 507.75ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-11-05 13:13:21,688 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 814 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 231.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 1617 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.30ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 738 IncrementalHoareTripleChecker+Unchecked, 286.28ms IncrementalHoareTripleChecker+Time [2021-11-05 13:13:21,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 1617 Invalid, 1236 Unknown, 0 Unchecked, 6.30ms Time], IncrementalHoareTripleChecker [62 Valid, 436 Invalid, 0 Unknown, 738 Unchecked, 286.28ms Time] [2021-11-05 13:13:21,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-05 13:13:21,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 190. [2021-11-05 13:13:21,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 186 states have (on average 1.2849462365591398) internal successors, (239), 189 states have internal predecessors, (239), 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) [2021-11-05 13:13:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 239 transitions. [2021-11-05 13:13:21,697 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 239 transitions. Word has length 65 [2021-11-05 13:13:21,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:13:21,698 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 239 transitions. [2021-11-05 13:13:21,698 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) [2021-11-05 13:13:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 239 transitions. [2021-11-05 13:13:21,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-05 13:13:21,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:13:21,699 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] [2021-11-05 13:13:21,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-05 13:13:21,915 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,SelfDestructingSolverStorable11 [2021-11-05 13:13:21,916 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)] === [2021-11-05 13:13:21,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:13:21,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1167005937, now seen corresponding path program 1 times [2021-11-05 13:13:21,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:13:21,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559854565] [2021-11-05 13:13:21,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:13:21,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:13:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:13:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:13:22,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:13:22,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559854565] [2021-11-05 13:13:22,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559854565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:13:22,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:13:22,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-05 13:13:22,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37522020] [2021-11-05 13:13:22,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:13:22,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-05 13:13:22,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:13:22,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-05 13:13:22,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-05 13:13:22,016 INFO L87 Difference]: Start difference. First operand 190 states and 239 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) [2021-11-05 13:13:22,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:13:22,268 INFO L93 Difference]: Finished difference Result 520 states and 662 transitions. [2021-11-05 13:13:22,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-05 13:13:22,269 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 [2021-11-05 13:13:22,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:13:22,270 INFO L225 Difference]: With dead ends: 520 [2021-11-05 13:13:22,270 INFO L226 Difference]: Without dead ends: 357 [2021-11-05 13:13:22,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 96.10ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-05 13:13:22,271 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 487 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 131.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.46ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 159.38ms IncrementalHoareTripleChecker+Time [2021-11-05 13:13:22,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 640 Invalid, 324 Unknown, 0 Unchecked, 2.46ms Time], IncrementalHoareTripleChecker [45 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 159.38ms Time] [2021-11-05 13:13:22,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-11-05 13:13:22,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 310. [2021-11-05 13:13:22,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 306 states have (on average 1.2908496732026145) internal successors, (395), 309 states have internal predecessors, (395), 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) [2021-11-05 13:13:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 395 transitions. [2021-11-05 13:13:22,283 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 395 transitions. Word has length 65 [2021-11-05 13:13:22,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:13:22,283 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 395 transitions. [2021-11-05 13:13:22,283 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) [2021-11-05 13:13:22,283 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 395 transitions. [2021-11-05 13:13:22,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-05 13:13:22,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:13:22,284 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] [2021-11-05 13:13:22,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-05 13:13:22,284 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)] === [2021-11-05 13:13:22,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:13:22,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1164925684, now seen corresponding path program 1 times [2021-11-05 13:13:22,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:13:22,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086691329] [2021-11-05 13:13:22,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:13:22,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:13:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:13:22,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:13:22,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:13:22,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086691329] [2021-11-05 13:13:22,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086691329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:13:22,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870961065] [2021-11-05 13:13:22,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:13:22,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:13:22,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:13:22,583 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) [2021-11-05 13:13:22,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-05 13:13:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:13:22,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-05 13:13:22,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:13:22,744 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-05 13:13:22,745 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 63 treesize of output 58 [2021-11-05 13:13:22,764 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-05 13:13:22,765 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 73 treesize of output 54 [2021-11-05 13:13:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 13:13:27,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 13:13:27,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870961065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:13:27,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-05 13:13:27,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 22 [2021-11-05 13:13:27,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334954408] [2021-11-05 13:13:27,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:13:27,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-05 13:13:27,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:13:27,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-05 13:13:27,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=403, Unknown=1, NotChecked=0, Total=462 [2021-11-05 13:13:27,797 INFO L87 Difference]: Start difference. First operand 310 states and 395 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 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) [2021-11-05 13:13:27,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:13:27,846 INFO L93 Difference]: Finished difference Result 566 states and 713 transitions. [2021-11-05 13:13:27,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-05 13:13:27,846 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 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 [2021-11-05 13:13:27,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:13:27,849 INFO L225 Difference]: With dead ends: 566 [2021-11-05 13:13:27,849 INFO L226 Difference]: Without dead ends: 498 [2021-11-05 13:13:27,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 3491.14ms TimeCoverageRelationStatistics Valid=63, Invalid=442, Unknown=1, NotChecked=0, Total=506 [2021-11-05 13:13:27,850 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 56 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.14ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 8.64ms IncrementalHoareTripleChecker+Time [2021-11-05 13:13:27,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 771 Invalid, 104 Unknown, 0 Unchecked, 1.14ms Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 92 Unchecked, 8.64ms Time] [2021-11-05 13:13:27,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-05 13:13:27,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 472. [2021-11-05 13:13:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 468 states have (on average 1.267094017094017) internal successors, (593), 471 states have internal predecessors, (593), 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) [2021-11-05 13:13:27,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 593 transitions. [2021-11-05 13:13:27,865 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 593 transitions. Word has length 67 [2021-11-05 13:13:27,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:13:27,866 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 593 transitions. [2021-11-05 13:13:27,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 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) [2021-11-05 13:13:27,866 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 593 transitions. [2021-11-05 13:13:27,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-05 13:13:27,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:13:27,867 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] [2021-11-05 13:13:27,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-05 13:13:28,083 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,SelfDestructingSolverStorable13 [2021-11-05 13:13:28,084 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)] === [2021-11-05 13:13:28,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:13:28,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1166772726, now seen corresponding path program 1 times [2021-11-05 13:13:28,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:13:28,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539398983] [2021-11-05 13:13:28,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:13:28,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:13:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:13:28,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 13:13:28,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:13:28,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539398983] [2021-11-05 13:13:28,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539398983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:13:28,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:13:28,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-05 13:13:28,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083003258] [2021-11-05 13:13:28,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:13:28,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-05 13:13:28,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:13:28,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-05 13:13:28,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-05 13:13:28,271 INFO L87 Difference]: Start difference. First operand 472 states and 593 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 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) [2021-11-05 13:13:28,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:13:28,599 INFO L93 Difference]: Finished difference Result 689 states and 868 transitions. [2021-11-05 13:13:28,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-05 13:13:28,601 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 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 [2021-11-05 13:13:28,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:13:28,603 INFO L225 Difference]: With dead ends: 689 [2021-11-05 13:13:28,603 INFO L226 Difference]: Without dead ends: 534 [2021-11-05 13:13:28,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 144.53ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-11-05 13:13:28,604 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 965 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 161.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.35ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 197.61ms IncrementalHoareTripleChecker+Time [2021-11-05 13:13:28,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [965 Valid, 870 Invalid, 406 Unknown, 0 Unchecked, 8.35ms Time], IncrementalHoareTripleChecker [70 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 197.61ms Time] [2021-11-05 13:13:28,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-05 13:13:28,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 484. [2021-11-05 13:13:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 480 states have (on average 1.2625) internal successors, (606), 483 states have internal predecessors, (606), 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) [2021-11-05 13:13:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 606 transitions. [2021-11-05 13:13:28,620 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 606 transitions. Word has length 67 [2021-11-05 13:13:28,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:13:28,620 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 606 transitions. [2021-11-05 13:13:28,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 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) [2021-11-05 13:13:28,620 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 606 transitions. [2021-11-05 13:13:28,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-05 13:13:28,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:13:28,621 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] [2021-11-05 13:13:28,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-05 13:13:28,622 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)] === [2021-11-05 13:13:28,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:13:28,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1353187208, now seen corresponding path program 1 times [2021-11-05 13:13:28,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:13:28,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537439606] [2021-11-05 13:13:28,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:13:28,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:13:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:13:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 13:13:28,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:13:28,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537439606] [2021-11-05 13:13:28,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537439606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:13:28,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:13:28,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-05 13:13:28,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935549773] [2021-11-05 13:13:28,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:13:28,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-05 13:13:28,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:13:28,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-05 13:13:28,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-05 13:13:28,842 INFO L87 Difference]: Start difference. First operand 484 states and 606 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 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) [2021-11-05 13:13:29,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:13:29,148 INFO L93 Difference]: Finished difference Result 914 states and 1164 transitions. [2021-11-05 13:13:29,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-05 13:13:29,149 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 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 [2021-11-05 13:13:29,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:13:29,151 INFO L225 Difference]: With dead ends: 914 [2021-11-05 13:13:29,151 INFO L226 Difference]: Without dead ends: 782 [2021-11-05 13:13:29,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 159.03ms TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-11-05 13:13:29,152 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 456 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 148.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.12ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 177.45ms IncrementalHoareTripleChecker+Time [2021-11-05 13:13:29,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 774 Invalid, 380 Unknown, 0 Unchecked, 2.12ms Time], IncrementalHoareTripleChecker [32 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 177.45ms Time] [2021-11-05 13:13:29,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-11-05 13:13:29,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 612. [2021-11-05 13:13:29,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 608 states have (on average 1.256578947368421) internal successors, (764), 611 states have internal predecessors, (764), 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) [2021-11-05 13:13:29,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 764 transitions. [2021-11-05 13:13:29,179 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 764 transitions. Word has length 67 [2021-11-05 13:13:29,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:13:29,179 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 764 transitions. [2021-11-05 13:13:29,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 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) [2021-11-05 13:13:29,179 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 764 transitions. [2021-11-05 13:13:29,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-05 13:13:29,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:13:29,180 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] [2021-11-05 13:13:29,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-05 13:13:29,180 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)] === [2021-11-05 13:13:29,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:13:29,181 INFO L85 PathProgramCache]: Analyzing trace with hash -673128838, now seen corresponding path program 1 times [2021-11-05 13:13:29,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:13:29,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562286735] [2021-11-05 13:13:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:13:29,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:13:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:13:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:13:29,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:13:29,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562286735] [2021-11-05 13:13:29,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562286735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:13:29,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161222853] [2021-11-05 13:13:29,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:13:29,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:13:29,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:13:29,301 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) [2021-11-05 13:13:29,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-05 13:13:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:13:29,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-05 13:13:29,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:13:29,456 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-05 13:13:29,457 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 33 treesize of output 29 [2021-11-05 13:13:48,337 WARN L230 SmtUtils]: Spent 8.84s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-05 13:13:59,731 WARN L230 SmtUtils]: Spent 9.36s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-05 13:14:11,311 WARN L230 SmtUtils]: Spent 9.45s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-05 13:14:20,684 WARN L230 SmtUtils]: Spent 9.33s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-05 13:14:30,836 WARN L230 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 26 [2021-11-05 13:14:38,799 WARN L230 SmtUtils]: Spent 7.91s on a formula simplification that was a NOOP. DAG size: 24 [2021-11-05 13:14:46,931 WARN L230 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-05 13:14:57,107 WARN L230 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-05 13:15:05,333 WARN L230 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-05 13:15:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:15:05,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:15:05,613 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 381 treesize of output 365 [2021-11-05 13:15:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:15:05,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161222853] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 13:15:05,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 13:15:05,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 29 [2021-11-05 13:15:05,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740191827] [2021-11-05 13:15:05,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 13:15:05,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-05 13:15:05,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:15:05,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-05 13:15:05,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=685, Unknown=7, NotChecked=0, Total=812 [2021-11-05 13:15:05,740 INFO L87 Difference]: Start difference. First operand 612 states and 764 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 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) [2021-11-05 13:15:25,171 WARN L230 SmtUtils]: Spent 19.38s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-11-05 13:15:25,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:15:25,397 INFO L93 Difference]: Finished difference Result 1027 states and 1274 transitions. [2021-11-05 13:15:25,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-05 13:15:25,398 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 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 [2021-11-05 13:15:25,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:15:25,401 INFO L225 Difference]: With dead ends: 1027 [2021-11-05 13:15:25,401 INFO L226 Difference]: Without dead ends: 944 [2021-11-05 13:15:25,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 114822.56ms TimeCoverageRelationStatistics Valid=172, Invalid=943, Unknown=7, NotChecked=0, Total=1122 [2021-11-05 13:15:25,402 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 272 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 148.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1904 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.68ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 183.11ms IncrementalHoareTripleChecker+Time [2021-11-05 13:15:25,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 1904 Invalid, 546 Unknown, 0 Unchecked, 3.68ms Time], IncrementalHoareTripleChecker [16 Valid, 332 Invalid, 0 Unknown, 198 Unchecked, 183.11ms Time] [2021-11-05 13:15:25,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-11-05 13:15:25,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 773. [2021-11-05 13:15:25,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 769 states have (on average 1.247074122236671) internal successors, (959), 772 states have internal predecessors, (959), 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) [2021-11-05 13:15:25,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 959 transitions. [2021-11-05 13:15:25,433 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 959 transitions. Word has length 67 [2021-11-05 13:15:25,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:15:25,433 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 959 transitions. [2021-11-05 13:15:25,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 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) [2021-11-05 13:15:25,434 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 959 transitions. [2021-11-05 13:15:25,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-05 13:15:25,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:15:25,435 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] [2021-11-05 13:15:25,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-05 13:15:25,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:15:25,653 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)] === [2021-11-05 13:15:25,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:15:25,654 INFO L85 PathProgramCache]: Analyzing trace with hash 27935740, now seen corresponding path program 1 times [2021-11-05 13:15:25,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:15:25,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946706491] [2021-11-05 13:15:25,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:15:25,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:15:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:15:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 13:15:25,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:15:25,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946706491] [2021-11-05 13:15:25,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946706491] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:15:25,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:15:25,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-05 13:15:25,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919541599] [2021-11-05 13:15:25,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:15:25,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-05 13:15:25,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:15:25,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-05 13:15:25,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-05 13:15:25,742 INFO L87 Difference]: Start difference. First operand 773 states and 959 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 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) [2021-11-05 13:15:25,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:15:25,799 INFO L93 Difference]: Finished difference Result 907 states and 1131 transitions. [2021-11-05 13:15:25,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-05 13:15:25,799 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 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 [2021-11-05 13:15:25,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:15:25,802 INFO L225 Difference]: With dead ends: 907 [2021-11-05 13:15:25,802 INFO L226 Difference]: Without dead ends: 765 [2021-11-05 13:15:25,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 24.35ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-05 13:15:25,803 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 346 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.67ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.78ms IncrementalHoareTripleChecker+Time [2021-11-05 13:15:25,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 293 Invalid, 42 Unknown, 0 Unchecked, 0.67ms Time], IncrementalHoareTripleChecker [14 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 16.78ms Time] [2021-11-05 13:15:25,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-11-05 13:15:25,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 765. [2021-11-05 13:15:25,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 761 states have (on average 1.2339027595269383) internal successors, (939), 764 states have internal predecessors, (939), 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) [2021-11-05 13:15:25,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 939 transitions. [2021-11-05 13:15:25,837 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 939 transitions. Word has length 67 [2021-11-05 13:15:25,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:15:25,837 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 939 transitions. [2021-11-05 13:15:25,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 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) [2021-11-05 13:15:25,837 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 939 transitions. [2021-11-05 13:15:25,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-05 13:15:25,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:15:25,838 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] [2021-11-05 13:15:25,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-05 13:15:25,839 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)] === [2021-11-05 13:15:25,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:15:25,839 INFO L85 PathProgramCache]: Analyzing trace with hash -651587334, now seen corresponding path program 1 times [2021-11-05 13:15:25,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:15:25,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888227038] [2021-11-05 13:15:25,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:15:25,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:15:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:15:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 13:15:25,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:15:25,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888227038] [2021-11-05 13:15:25,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888227038] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:15:25,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:15:25,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 13:15:25,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078525696] [2021-11-05 13:15:25,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:15:25,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 13:15:25,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:15:25,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 13:15:25,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 13:15:25,893 INFO L87 Difference]: Start difference. First operand 765 states and 939 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) [2021-11-05 13:15:25,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:15:25,948 INFO L93 Difference]: Finished difference Result 1106 states and 1367 transitions. [2021-11-05 13:15:25,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 13:15:25,949 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 [2021-11-05 13:15:25,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:15:25,950 INFO L225 Difference]: With dead ends: 1106 [2021-11-05 13:15:25,950 INFO L226 Difference]: Without dead ends: 346 [2021-11-05 13:15:25,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.49ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 13:15:25,952 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 10 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.48ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.64ms IncrementalHoareTripleChecker+Time [2021-11-05 13:15:25,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 375 Invalid, 74 Unknown, 0 Unchecked, 0.48ms Time], IncrementalHoareTripleChecker [19 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 34.64ms Time] [2021-11-05 13:15:25,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-05 13:15:25,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 341. [2021-11-05 13:15:25,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 337 states have (on average 1.2136498516320475) internal successors, (409), 340 states have internal predecessors, (409), 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) [2021-11-05 13:15:25,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 409 transitions. [2021-11-05 13:15:25,973 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 409 transitions. Word has length 67 [2021-11-05 13:15:25,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:15:25,973 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 409 transitions. [2021-11-05 13:15:25,974 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) [2021-11-05 13:15:25,974 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 409 transitions. [2021-11-05 13:15:25,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-05 13:15:25,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:15:25,976 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] [2021-11-05 13:15:25,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-05 13:15:25,977 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)] === [2021-11-05 13:15:25,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:15:25,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1384277337, now seen corresponding path program 1 times [2021-11-05 13:15:25,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:15:25,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417004458] [2021-11-05 13:15:25,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:15:25,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:15:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:15:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 13:15:26,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:15:26,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417004458] [2021-11-05 13:15:26,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417004458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:15:26,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:15:26,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-05 13:15:26,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072470503] [2021-11-05 13:15:26,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:15:26,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-05 13:15:26,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:15:26,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-05 13:15:26,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-05 13:15:26,059 INFO L87 Difference]: Start difference. First operand 341 states and 409 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2021-11-05 13:15:26,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:15:26,142 INFO L93 Difference]: Finished difference Result 411 states and 493 transitions. [2021-11-05 13:15:26,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-05 13:15:26,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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 [2021-11-05 13:15:26,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:15:26,144 INFO L225 Difference]: With dead ends: 411 [2021-11-05 13:15:26,144 INFO L226 Difference]: Without dead ends: 341 [2021-11-05 13:15:26,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 39.67ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-05 13:15:26,145 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 545 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.77ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.33ms IncrementalHoareTripleChecker+Time [2021-11-05 13:15:26,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 147 Invalid, 81 Unknown, 0 Unchecked, 0.77ms Time], IncrementalHoareTripleChecker [29 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 43.33ms Time] [2021-11-05 13:15:26,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-11-05 13:15:26,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2021-11-05 13:15:26,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 337 states have (on average 1.2077151335311573) internal successors, (407), 340 states have internal predecessors, (407), 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) [2021-11-05 13:15:26,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 407 transitions. [2021-11-05 13:15:26,163 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 407 transitions. Word has length 69 [2021-11-05 13:15:26,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:15:26,163 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 407 transitions. [2021-11-05 13:15:26,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2021-11-05 13:15:26,163 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 407 transitions. [2021-11-05 13:15:26,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-05 13:15:26,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:15:26,164 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] [2021-11-05 13:15:26,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-05 13:15:26,164 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)] === [2021-11-05 13:15:26,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:15:26,165 INFO L85 PathProgramCache]: Analyzing trace with hash 80619544, now seen corresponding path program 1 times [2021-11-05 13:15:26,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:15:26,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991491172] [2021-11-05 13:15:26,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:15:26,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:15:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:15:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:15:26,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:15:26,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991491172] [2021-11-05 13:15:26,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991491172] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:15:26,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906521543] [2021-11-05 13:15:26,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:15:26,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:15:26,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:15:26,339 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) [2021-11-05 13:15:26,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-05 13:15:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:15:26,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-05 13:15:26,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:15:26,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-05 13:15:26,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-05 13:15:26,534 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 27 treesize of output 15 [2021-11-05 13:15:26,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-05 13:15:26,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-05 13:15:26,616 INFO L354 Elim1Store]: treesize reduction 68, result has 29.2 percent of original size [2021-11-05 13:15:26,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 48 [2021-11-05 13:15:27,217 INFO L354 Elim1Store]: treesize reduction 36, result has 25.0 percent of original size [2021-11-05 13:15:27,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 36 [2021-11-05 13:15:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:15:27,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:15:27,548 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 3246 treesize of output 3214 [2021-11-05 13:15:27,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:15:27,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906521543] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 13:15:27,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 13:15:27,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2021-11-05 13:15:27,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872048269] [2021-11-05 13:15:27,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 13:15:27,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-05 13:15:27,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:15:27,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-05 13:15:27,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-11-05 13:15:27,974 INFO L87 Difference]: Start difference. First operand 341 states and 407 transitions. Second operand has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 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) [2021-11-05 13:15:28,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:15:28,930 INFO L93 Difference]: Finished difference Result 626 states and 738 transitions. [2021-11-05 13:15:28,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-05 13:15:28,931 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 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 [2021-11-05 13:15:28,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:15:28,933 INFO L225 Difference]: With dead ends: 626 [2021-11-05 13:15:28,933 INFO L226 Difference]: Without dead ends: 468 [2021-11-05 13:15:28,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 831.54ms TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2021-11-05 13:15:28,934 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 1015 mSDsluCounter, 2102 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 403.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 2258 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.15ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 503.84ms IncrementalHoareTripleChecker+Time [2021-11-05 13:15:28,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1015 Valid, 2258 Invalid, 928 Unknown, 0 Unchecked, 6.15ms Time], IncrementalHoareTripleChecker [50 Valid, 803 Invalid, 0 Unknown, 75 Unchecked, 503.84ms Time] [2021-11-05 13:15:28,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-05 13:15:28,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 329. [2021-11-05 13:15:28,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 325 states have (on average 1.2) internal successors, (390), 328 states have internal predecessors, (390), 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) [2021-11-05 13:15:28,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 390 transitions. [2021-11-05 13:15:28,954 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 390 transitions. Word has length 69 [2021-11-05 13:15:28,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:15:28,954 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 390 transitions. [2021-11-05 13:15:28,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 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) [2021-11-05 13:15:28,954 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 390 transitions. [2021-11-05 13:15:28,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-05 13:15:28,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:15:28,955 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] [2021-11-05 13:15:28,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-05 13:15:29,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:15:29,172 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)] === [2021-11-05 13:15:29,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:15:29,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1040503474, now seen corresponding path program 1 times [2021-11-05 13:15:29,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:15:29,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632861189] [2021-11-05 13:15:29,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:15:29,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:15:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:15:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 13:15:29,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:15:29,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632861189] [2021-11-05 13:15:29,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632861189] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:15:29,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:15:29,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 13:15:29,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428894383] [2021-11-05 13:15:29,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:15:29,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 13:15:29,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:15:29,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 13:15:29,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 13:15:29,209 INFO L87 Difference]: Start difference. First operand 329 states and 390 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) [2021-11-05 13:15:29,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:15:29,265 INFO L93 Difference]: Finished difference Result 687 states and 813 transitions. [2021-11-05 13:15:29,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 13:15:29,267 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 [2021-11-05 13:15:29,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:15:29,268 INFO L225 Difference]: With dead ends: 687 [2021-11-05 13:15:29,268 INFO L226 Difference]: Without dead ends: 431 [2021-11-05 13:15:29,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.68ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 13:15:29,270 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 93 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.44ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.55ms IncrementalHoareTripleChecker+Time [2021-11-05 13:15:29,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 291 Invalid, 73 Unknown, 0 Unchecked, 0.44ms Time], IncrementalHoareTripleChecker [17 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 33.55ms Time] [2021-11-05 13:15:29,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-11-05 13:15:29,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 309. [2021-11-05 13:15:29,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 305 states have (on average 1.180327868852459) internal successors, (360), 308 states have internal predecessors, (360), 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) [2021-11-05 13:15:29,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 360 transitions. [2021-11-05 13:15:29,284 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 360 transitions. Word has length 74 [2021-11-05 13:15:29,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:15:29,285 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 360 transitions. [2021-11-05 13:15:29,285 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) [2021-11-05 13:15:29,285 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 360 transitions. [2021-11-05 13:15:29,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-05 13:15:29,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:15:29,286 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] [2021-11-05 13:15:29,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-05 13:15:29,286 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)] === [2021-11-05 13:15:29,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:15:29,287 INFO L85 PathProgramCache]: Analyzing trace with hash 500105518, now seen corresponding path program 1 times [2021-11-05 13:15:29,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:15:29,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343585761] [2021-11-05 13:15:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:15:29,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:15:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:15:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 13:15:29,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:15:29,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343585761] [2021-11-05 13:15:29,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343585761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:15:29,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:15:29,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-05 13:15:29,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5633640] [2021-11-05 13:15:29,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:15:29,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-05 13:15:29,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:15:29,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-05 13:15:29,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-05 13:15:29,408 INFO L87 Difference]: Start difference. First operand 309 states and 360 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) [2021-11-05 13:15:29,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:15:29,670 INFO L93 Difference]: Finished difference Result 805 states and 930 transitions. [2021-11-05 13:15:29,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-05 13:15:29,671 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 [2021-11-05 13:15:29,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:15:29,672 INFO L225 Difference]: With dead ends: 805 [2021-11-05 13:15:29,672 INFO L226 Difference]: Without dead ends: 593 [2021-11-05 13:15:29,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 107.17ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-05 13:15:29,673 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 322 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.15ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 146.86ms IncrementalHoareTripleChecker+Time [2021-11-05 13:15:29,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 539 Invalid, 311 Unknown, 0 Unchecked, 1.15ms Time], IncrementalHoareTripleChecker [50 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 146.86ms Time] [2021-11-05 13:15:29,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-11-05 13:15:29,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 317. [2021-11-05 13:15:29,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 313 states have (on average 1.1757188498402555) internal successors, (368), 316 states have internal predecessors, (368), 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) [2021-11-05 13:15:29,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 368 transitions. [2021-11-05 13:15:29,692 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 368 transitions. Word has length 74 [2021-11-05 13:15:29,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:15:29,692 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 368 transitions. [2021-11-05 13:15:29,692 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) [2021-11-05 13:15:29,692 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 368 transitions. [2021-11-05 13:15:29,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-05 13:15:29,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:15:29,693 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] [2021-11-05 13:15:29,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-05 13:15:29,693 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)] === [2021-11-05 13:15:29,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:15:29,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1393591856, now seen corresponding path program 1 times [2021-11-05 13:15:29,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:15:29,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470954795] [2021-11-05 13:15:29,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:15:29,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:15:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:15:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-05 13:15:29,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:15:29,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470954795] [2021-11-05 13:15:29,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470954795] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:15:29,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045092898] [2021-11-05 13:15:29,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:15:29,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:15:29,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:15:29,828 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) [2021-11-05 13:15:29,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-05 13:15:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:15:29,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-05 13:15:29,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:15:29,991 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-05 13:15:29,991 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 63 treesize of output 50 [2021-11-05 13:15:30,007 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-05 13:15:30,008 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 71 treesize of output 54 [2021-11-05 13:15:34,168 INFO L354 Elim1Store]: treesize reduction 48, result has 40.0 percent of original size [2021-11-05 13:15:34,168 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 92 [2021-11-05 13:15:34,208 INFO L354 Elim1Store]: treesize reduction 22, result has 64.5 percent of original size [2021-11-05 13:15:34,208 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 92 [2021-11-05 13:15:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:15:34,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:15:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 13:15:34,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045092898] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 13:15:34,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 13:15:34,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 33 [2021-11-05 13:15:34,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129288861] [2021-11-05 13:15:34,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 13:15:34,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-05 13:15:34,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:15:34,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-05 13:15:34,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-11-05 13:15:34,881 INFO L87 Difference]: Start difference. First operand 317 states and 368 transitions. Second operand has 33 states, 33 states have (on average 5.7272727272727275) internal successors, (189), 33 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) [2021-11-05 13:15:41,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:15:41,875 INFO L93 Difference]: Finished difference Result 854 states and 977 transitions. [2021-11-05 13:15:41,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-05 13:15:41,876 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.7272727272727275) internal successors, (189), 33 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 [2021-11-05 13:15:41,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:15:41,884 INFO L225 Difference]: With dead ends: 854 [2021-11-05 13:15:41,884 INFO L226 Difference]: Without dead ends: 712 [2021-11-05 13:15:41,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 9350.23ms TimeCoverageRelationStatistics Valid=522, Invalid=3017, Unknown=1, NotChecked=0, Total=3540 [2021-11-05 13:15:41,885 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 494 mSDsluCounter, 3107 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 483.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 3289 SdHoareTripleChecker+Invalid, 1615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.76ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 572.96ms IncrementalHoareTripleChecker+Time [2021-11-05 13:15:41,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 3289 Invalid, 1615 Unknown, 0 Unchecked, 5.76ms Time], IncrementalHoareTripleChecker [29 Valid, 1313 Invalid, 0 Unknown, 273 Unchecked, 572.96ms Time] [2021-11-05 13:15:41,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-11-05 13:15:41,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 365. [2021-11-05 13:15:41,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 361 states have (on average 1.1578947368421053) internal successors, (418), 364 states have internal predecessors, (418), 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) [2021-11-05 13:15:41,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 418 transitions. [2021-11-05 13:15:41,907 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 418 transitions. Word has length 74 [2021-11-05 13:15:41,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:15:41,907 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 418 transitions. [2021-11-05 13:15:41,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.7272727272727275) internal successors, (189), 33 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) [2021-11-05 13:15:41,908 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 418 transitions. [2021-11-05 13:15:41,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-05 13:15:41,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:15:41,909 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:15:41,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-05 13:15:42,123 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,SelfDestructingSolverStorable23 [2021-11-05 13:15:42,124 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)] === [2021-11-05 13:15:42,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:15:42,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1620082764, now seen corresponding path program 2 times [2021-11-05 13:15:42,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:15:42,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153370923] [2021-11-05 13:15:42,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:15:42,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:15:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:15:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-05 13:15:42,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:15:42,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153370923] [2021-11-05 13:15:42,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153370923] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:15:42,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194693464] [2021-11-05 13:15:42,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-05 13:15:42,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:15:42,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:15:42,275 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) [2021-11-05 13:15:42,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-05 13:15:42,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-05 13:15:42,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 13:15:42,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-05 13:15:42,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:15:42,420 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-05 13:15:42,420 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 63 treesize of output 50 [2021-11-05 13:15:42,433 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-05 13:15:42,433 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 71 treesize of output 54 [2021-11-05 13:15:46,550 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-11-05 13:15:46,551 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 92 [2021-11-05 13:15:46,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-05 13:15:46,564 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 95 [2021-11-05 13:15:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-05 13:15:46,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 13:15:46,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194693464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:15:46,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-05 13:15:46,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 20 [2021-11-05 13:15:46,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030438547] [2021-11-05 13:15:46,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:15:46,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-05 13:15:46,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:15:46,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-05 13:15:46,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-11-05 13:15:46,708 INFO L87 Difference]: Start difference. First operand 365 states and 418 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) [2021-11-05 13:15:46,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:15:46,781 INFO L93 Difference]: Finished difference Result 432 states and 498 transitions. [2021-11-05 13:15:46,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-05 13:15:46,781 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 75 [2021-11-05 13:15:46,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:15:46,782 INFO L225 Difference]: With dead ends: 432 [2021-11-05 13:15:46,782 INFO L226 Difference]: Without dead ends: 356 [2021-11-05 13:15:46,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2714.28ms TimeCoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-11-05 13:15:46,783 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 29 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.69ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 18.62ms IncrementalHoareTripleChecker+Time [2021-11-05 13:15:46,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 800 Invalid, 178 Unknown, 0 Unchecked, 0.69ms Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 147 Unchecked, 18.62ms Time] [2021-11-05 13:15:46,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-11-05 13:15:46,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 312. [2021-11-05 13:15:46,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 308 states have (on average 1.1623376623376624) internal successors, (358), 311 states have internal predecessors, (358), 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) [2021-11-05 13:15:46,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 358 transitions. [2021-11-05 13:15:46,800 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 358 transitions. Word has length 75 [2021-11-05 13:15:46,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:15:46,800 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 358 transitions. [2021-11-05 13:15:46,801 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) [2021-11-05 13:15:46,801 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 358 transitions. [2021-11-05 13:15:46,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-05 13:15:46,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:15:46,802 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] [2021-11-05 13:15:46,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-05 13:15:47,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:15:47,020 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)] === [2021-11-05 13:15:47,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:15:47,020 INFO L85 PathProgramCache]: Analyzing trace with hash 841974699, now seen corresponding path program 1 times [2021-11-05 13:15:47,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:15:47,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020278246] [2021-11-05 13:15:47,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:15:47,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:15:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:15:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:15:47,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:15:47,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020278246] [2021-11-05 13:15:47,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020278246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:15:47,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314117971] [2021-11-05 13:15:47,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:15:47,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:15:47,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:15:47,380 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) [2021-11-05 13:15:47,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-05 13:15:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:15:47,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 127 conjunts are in the unsatisfiable core [2021-11-05 13:15:47,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:15:47,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-11-05 13:15:47,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-05 13:15:47,558 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 14 treesize of output 15 [2021-11-05 13:15:48,914 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-11-05 13:15:48,915 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 154 treesize of output 88 [2021-11-05 13:15:48,922 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-05 13:15:48,922 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 31 [2021-11-05 13:15:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:15:48,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:15:49,826 INFO L354 Elim1Store]: treesize reduction 331, result has 32.4 percent of original size [2021-11-05 13:15:49,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 4734 treesize of output 4408 [2021-11-05 13:15:50,054 INFO L354 Elim1Store]: treesize reduction 453, result has 25.0 percent of original size [2021-11-05 13:15:50,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 29 case distinctions, treesize of input 24945 treesize of output 23133 [2021-11-05 13:15:51,266 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2021-11-05 13:15:51,267 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 17337 treesize of output 16661 [2021-11-05 13:15:51,409 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-11-05 13:15:51,410 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 16661 treesize of output 16311 [2021-11-05 13:15:55,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-05 13:15:55,107 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 26 treesize of output 30 [2021-11-05 13:15:55,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-05 13:15:55,444 INFO L354 Elim1Store]: treesize reduction 20, result has 68.3 percent of original size [2021-11-05 13:15:55,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 217 treesize of output 243 [2021-11-05 13:15:56,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-05 13:15:56,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-05 13:15:56,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 209 treesize of output 223 [2021-11-05 13:15:56,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-05 13:15:56,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-05 13:15:56,728 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-05 13:15:56,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 229 treesize of output 1 [2021-11-05 13:15:57,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-05 13:15:57,308 INFO L354 Elim1Store]: treesize reduction 10, result has 88.5 percent of original size [2021-11-05 13:15:57,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 1001 treesize of output 1003 [2021-11-05 13:16:07,883 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 [2021-11-05 13:16:07,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-05 13:16:07,904 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 223 treesize of output 223 [2021-11-05 13:16:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:16:08,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314117971] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 13:16:08,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 13:16:08,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 22] total 48 [2021-11-05 13:16:08,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637128495] [2021-11-05 13:16:08,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 13:16:08,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-05 13:16:08,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:16:08,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-05 13:16:08,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1983, Unknown=0, NotChecked=0, Total=2256 [2021-11-05 13:16:08,232 INFO L87 Difference]: Start difference. First operand 312 states and 358 transitions. Second operand has 48 states, 48 states have (on average 3.625) internal successors, (174), 48 states have internal predecessors, (174), 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) [2021-11-05 13:16:17,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:16:17,407 INFO L93 Difference]: Finished difference Result 1105 states and 1240 transitions. [2021-11-05 13:16:17,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-05 13:16:17,408 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.625) internal successors, (174), 48 states have internal predecessors, (174), 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 [2021-11-05 13:16:17,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:16:17,410 INFO L225 Difference]: With dead ends: 1105 [2021-11-05 13:16:17,410 INFO L226 Difference]: Without dead ends: 938 [2021-11-05 13:16:17,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 120 SyntacticMatches, 4 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5240 ImplicationChecksByTransitivity, 7930.75ms TimeCoverageRelationStatistics Valid=4342, Invalid=13480, Unknown=0, NotChecked=0, Total=17822 [2021-11-05 13:16:17,426 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 4997 mSDsluCounter, 3394 mSDsCounter, 0 mSdLazyCounter, 3194 mSolverCounterSat, 803 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1730.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4997 SdHoareTripleChecker+Valid, 3479 SdHoareTripleChecker+Invalid, 3997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.10ms SdHoareTripleChecker+Time, 803 IncrementalHoareTripleChecker+Valid, 3194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2046.86ms IncrementalHoareTripleChecker+Time [2021-11-05 13:16:17,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4997 Valid, 3479 Invalid, 3997 Unknown, 0 Unchecked, 16.10ms Time], IncrementalHoareTripleChecker [803 Valid, 3194 Invalid, 0 Unknown, 0 Unchecked, 2046.86ms Time] [2021-11-05 13:16:17,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-11-05 13:16:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 385. [2021-11-05 13:16:17,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 381 states have (on average 1.1732283464566928) internal successors, (447), 384 states have internal predecessors, (447), 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) [2021-11-05 13:16:17,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 447 transitions. [2021-11-05 13:16:17,462 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 447 transitions. Word has length 77 [2021-11-05 13:16:17,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:16:17,462 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 447 transitions. [2021-11-05 13:16:17,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.625) internal successors, (174), 48 states have internal predecessors, (174), 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) [2021-11-05 13:16:17,462 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 447 transitions. [2021-11-05 13:16:17,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-05 13:16:17,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:16:17,463 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] [2021-11-05 13:16:17,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-05 13:16:17,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:16:17,677 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)] === [2021-11-05 13:16:17,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:16:17,677 INFO L85 PathProgramCache]: Analyzing trace with hash 32628073, now seen corresponding path program 1 times [2021-11-05 13:16:17,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:16:17,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020792345] [2021-11-05 13:16:17,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:16:17,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:16:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:16:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:16:17,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:16:17,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020792345] [2021-11-05 13:16:17,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020792345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:16:17,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085957168] [2021-11-05 13:16:17,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:16:17,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:16:17,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:16:17,857 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) [2021-11-05 13:16:17,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-05 13:16:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:16:17,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-05 13:16:17,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:16:18,016 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-05 13:16:18,017 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 33 treesize of output 29 [2021-11-05 13:16:38,062 WARN L230 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-05 13:16:49,581 WARN L230 SmtUtils]: Spent 9.47s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-05 13:17:00,985 WARN L230 SmtUtils]: Spent 9.29s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-05 13:17:11,042 WARN L230 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-05 13:17:19,307 WARN L230 SmtUtils]: Spent 8.14s on a formula simplification that was a NOOP. DAG size: 26 [2021-11-05 13:17:27,391 WARN L230 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 24 [2021-11-05 13:17:35,492 WARN L230 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-05 13:17:43,732 WARN L230 SmtUtils]: Spent 8.10s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-05 13:17:49,941 WARN L230 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-05 13:17:58,086 WARN L230 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-05 13:18:06,167 WARN L230 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-05 13:18:14,456 WARN L230 SmtUtils]: Spent 8.21s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-05 13:18:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:18:14,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:18:14,736 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 381 treesize of output 365 [2021-11-05 13:18:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:18:14,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085957168] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 13:18:14,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 13:18:14,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 35 [2021-11-05 13:18:14,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171501775] [2021-11-05 13:18:14,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 13:18:14,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-05 13:18:14,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:18:14,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-05 13:18:14,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1048, Unknown=7, NotChecked=0, Total=1190 [2021-11-05 13:18:14,847 INFO L87 Difference]: Start difference. First operand 385 states and 447 transitions. Second operand has 35 states, 35 states have (on average 4.8) internal successors, (168), 35 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) [2021-11-05 13:18:24,918 WARN L230 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-05 13:18:42,980 WARN L230 SmtUtils]: Spent 18.05s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-11-05 13:18:43,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:18:43,098 INFO L93 Difference]: Finished difference Result 452 states and 522 transitions. [2021-11-05 13:18:43,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-05 13:18:43,098 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.8) internal successors, (168), 35 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) Word has length 77 [2021-11-05 13:18:43,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:18:43,099 INFO L225 Difference]: With dead ends: 452 [2021-11-05 13:18:43,099 INFO L226 Difference]: Without dead ends: 393 [2021-11-05 13:18:43,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 144132.39ms TimeCoverageRelationStatistics Valid=160, Invalid=1239, Unknown=7, NotChecked=0, Total=1406 [2021-11-05 13:18:43,100 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 80 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 103.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1307 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.37ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 123.93ms IncrementalHoareTripleChecker+Time [2021-11-05 13:18:43,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 1307 Invalid, 367 Unknown, 0 Unchecked, 1.37ms Time], IncrementalHoareTripleChecker [3 Valid, 251 Invalid, 0 Unknown, 113 Unchecked, 123.93ms Time] [2021-11-05 13:18:43,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-05 13:18:43,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 385. [2021-11-05 13:18:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 381 states have (on average 1.1706036745406825) internal successors, (446), 384 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) [2021-11-05 13:18:43,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 446 transitions. [2021-11-05 13:18:43,124 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 446 transitions. Word has length 77 [2021-11-05 13:18:43,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:18:43,124 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 446 transitions. [2021-11-05 13:18:43,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.8) internal successors, (168), 35 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) [2021-11-05 13:18:43,125 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 446 transitions. [2021-11-05 13:18:43,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-05 13:18:43,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:18:43,126 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:18:43,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-05 13:18:43,343 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,SelfDestructingSolverStorable26 [2021-11-05 13:18:43,344 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)] === [2021-11-05 13:18:43,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:18:43,344 INFO L85 PathProgramCache]: Analyzing trace with hash 420906986, now seen corresponding path program 2 times [2021-11-05 13:18:43,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:18:43,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259736636] [2021-11-05 13:18:43,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:18:43,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:18:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:18:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-05 13:18:43,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:18:43,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259736636] [2021-11-05 13:18:43,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259736636] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:18:43,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67866929] [2021-11-05 13:18:43,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-05 13:18:43,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:18:43,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:18:43,503 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) [2021-11-05 13:18:43,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-05 13:18:43,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-05 13:18:43,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 13:18:43,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-05 13:18:43,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:18:43,682 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-05 13:18:43,682 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 63 treesize of output 50 [2021-11-05 13:18:43,696 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-05 13:18:43,696 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 71 treesize of output 54 [2021-11-05 13:18:44,872 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-05 13:18:44,872 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 81 treesize of output 56 [2021-11-05 13:18:44,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-05 13:18:44,877 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 50 treesize of output 45 [2021-11-05 13:18:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-05 13:18:44,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 13:18:44,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67866929] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:18:44,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-05 13:18:44,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 20 [2021-11-05 13:18:44,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4945995] [2021-11-05 13:18:44,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:18:44,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-05 13:18:44,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:18:44,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-05 13:18:44,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-11-05 13:18:44,928 INFO L87 Difference]: Start difference. First operand 385 states and 446 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 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) [2021-11-05 13:18:45,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:18:45,851 INFO L93 Difference]: Finished difference Result 461 states and 539 transitions. [2021-11-05 13:18:45,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-05 13:18:45,852 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 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 77 [2021-11-05 13:18:45,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:18:45,853 INFO L225 Difference]: With dead ends: 461 [2021-11-05 13:18:45,853 INFO L226 Difference]: Without dead ends: 383 [2021-11-05 13:18:45,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 983.46ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-11-05 13:18:45,854 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 541 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 154.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.48ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 179.94ms IncrementalHoareTripleChecker+Time [2021-11-05 13:18:45,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 452 Invalid, 333 Unknown, 0 Unchecked, 1.48ms Time], IncrementalHoareTripleChecker [70 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 179.94ms Time] [2021-11-05 13:18:45,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-11-05 13:18:45,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2021-11-05 13:18:45,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 379 states have (on average 1.158311345646438) internal successors, (439), 382 states have internal predecessors, (439), 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) [2021-11-05 13:18:45,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 439 transitions. [2021-11-05 13:18:45,884 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 439 transitions. Word has length 77 [2021-11-05 13:18:45,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:18:45,884 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 439 transitions. [2021-11-05 13:18:45,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 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) [2021-11-05 13:18:45,884 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 439 transitions. [2021-11-05 13:18:45,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-05 13:18:45,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:18:45,885 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] [2021-11-05 13:18:45,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-05 13:18:46,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-05 13:18:46,090 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:18:46,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:18:46,091 INFO L85 PathProgramCache]: Analyzing trace with hash 561523053, now seen corresponding path program 1 times [2021-11-05 13:18:46,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:18:46,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475544052] [2021-11-05 13:18:46,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:18:46,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:18:46,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:18:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-05 13:18:46,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:18:46,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475544052] [2021-11-05 13:18:46,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475544052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:18:46,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:18:46,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-05 13:18:46,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327947856] [2021-11-05 13:18:46,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:18:46,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-05 13:18:46,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:18:46,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-05 13:18:46,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-05 13:18:46,138 INFO L87 Difference]: Start difference. First operand 383 states and 439 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) [2021-11-05 13:18:46,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:18:46,226 INFO L93 Difference]: Finished difference Result 471 states and 539 transitions. [2021-11-05 13:18:46,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-05 13:18:46,226 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 [2021-11-05 13:18:46,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:18:46,228 INFO L225 Difference]: With dead ends: 471 [2021-11-05 13:18:46,228 INFO L226 Difference]: Without dead ends: 458 [2021-11-05 13:18:46,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.70ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-05 13:18:46,228 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 121 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.61ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.52ms IncrementalHoareTripleChecker+Time [2021-11-05 13:18:46,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 560 Invalid, 88 Unknown, 0 Unchecked, 0.61ms Time], IncrementalHoareTripleChecker [11 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 39.52ms Time] [2021-11-05 13:18:46,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-05 13:18:46,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 390. [2021-11-05 13:18:46,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 386 states have (on average 1.1476683937823835) internal successors, (443), 389 states have internal predecessors, (443), 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) [2021-11-05 13:18:46,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 443 transitions. [2021-11-05 13:18:46,259 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 443 transitions. Word has length 80 [2021-11-05 13:18:46,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:18:46,259 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 443 transitions. [2021-11-05 13:18:46,259 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) [2021-11-05 13:18:46,259 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 443 transitions. [2021-11-05 13:18:46,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-05 13:18:46,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:18:46,260 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] [2021-11-05 13:18:46,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-05 13:18:46,260 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:18:46,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:18:46,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1542092017, now seen corresponding path program 1 times [2021-11-05 13:18:46,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:18:46,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119504462] [2021-11-05 13:18:46,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:18:46,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:18:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:18:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-05 13:18:46,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:18:46,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119504462] [2021-11-05 13:18:46,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119504462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:18:46,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:18:46,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 13:18:46,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269694325] [2021-11-05 13:18:46,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:18:46,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 13:18:46,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:18:46,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 13:18:46,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 13:18:46,321 INFO L87 Difference]: Start difference. First operand 390 states and 443 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) [2021-11-05 13:18:46,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:18:46,363 INFO L93 Difference]: Finished difference Result 390 states and 443 transitions. [2021-11-05 13:18:46,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 13:18:46,364 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 [2021-11-05 13:18:46,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:18:46,365 INFO L225 Difference]: With dead ends: 390 [2021-11-05 13:18:46,365 INFO L226 Difference]: Without dead ends: 388 [2021-11-05 13:18:46,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.98ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 13:18:46,366 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 44 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.32ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.52ms IncrementalHoareTripleChecker+Time [2021-11-05 13:18:46,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 292 Invalid, 12 Unknown, 0 Unchecked, 0.32ms Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 8.52ms Time] [2021-11-05 13:18:46,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-05 13:18:46,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2021-11-05 13:18:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 385 states have (on average 1.1402597402597403) internal successors, (439), 387 states have internal predecessors, (439), 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) [2021-11-05 13:18:46,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 439 transitions. [2021-11-05 13:18:46,397 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 439 transitions. Word has length 82 [2021-11-05 13:18:46,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:18:46,397 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 439 transitions. [2021-11-05 13:18:46,397 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) [2021-11-05 13:18:46,397 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 439 transitions. [2021-11-05 13:18:46,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-05 13:18:46,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:18:46,398 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] [2021-11-05 13:18:46,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-05 13:18:46,398 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)] === [2021-11-05 13:18:46,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:18:46,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1488938402, now seen corresponding path program 1 times [2021-11-05 13:18:46,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:18:46,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544406754] [2021-11-05 13:18:46,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:18:46,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:18:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:18:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-05 13:18:46,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:18:46,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544406754] [2021-11-05 13:18:46,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544406754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:18:46,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:18:46,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-05 13:18:46,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370420133] [2021-11-05 13:18:46,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:18:46,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-05 13:18:46,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:18:46,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-05 13:18:46,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-05 13:18:46,516 INFO L87 Difference]: Start difference. First operand 388 states and 439 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 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) [2021-11-05 13:18:46,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:18:46,666 INFO L93 Difference]: Finished difference Result 388 states and 439 transitions. [2021-11-05 13:18:46,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-05 13:18:46,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 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 [2021-11-05 13:18:46,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:18:46,668 INFO L225 Difference]: With dead ends: 388 [2021-11-05 13:18:46,668 INFO L226 Difference]: Without dead ends: 386 [2021-11-05 13:18:46,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 81.37ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-11-05 13:18:46,669 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 191 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.65ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.53ms IncrementalHoareTripleChecker+Time [2021-11-05 13:18:46,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 353 Invalid, 85 Unknown, 0 Unchecked, 0.65ms Time], IncrementalHoareTripleChecker [10 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 45.53ms Time] [2021-11-05 13:18:46,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-05 13:18:46,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2021-11-05 13:18:46,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 384 states have (on average 1.1328125) internal successors, (435), 385 states have internal predecessors, (435), 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) [2021-11-05 13:18:46,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 435 transitions. [2021-11-05 13:18:46,701 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 435 transitions. Word has length 85 [2021-11-05 13:18:46,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:18:46,701 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 435 transitions. [2021-11-05 13:18:46,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 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) [2021-11-05 13:18:46,701 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 435 transitions. [2021-11-05 13:18:46,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-05 13:18:46,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:18:46,702 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] [2021-11-05 13:18:46,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-05 13:18:46,704 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)] === [2021-11-05 13:18:46,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:18:46,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1748357123, now seen corresponding path program 1 times [2021-11-05 13:18:46,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:18:46,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171827141] [2021-11-05 13:18:46,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:18:46,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:18:46,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:18:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:18:47,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:18:47,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171827141] [2021-11-05 13:18:47,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171827141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:18:47,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913117862] [2021-11-05 13:18:47,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:18:47,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:18:47,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:18:47,090 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) [2021-11-05 13:18:47,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-05 13:18:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:18:47,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-05 13:18:47,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:18:47,260 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-05 13:18:47,260 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 63 treesize of output 58 [2021-11-05 13:18:47,268 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-05 13:18:47,268 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 73 treesize of output 54 [2021-11-05 13:18:50,322 INFO L354 Elim1Store]: treesize reduction 107, result has 28.2 percent of original size [2021-11-05 13:18:50,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 160 treesize of output 139 [2021-11-05 13:18:50,360 INFO L354 Elim1Store]: treesize reduction 45, result has 53.6 percent of original size [2021-11-05 13:18:50,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 113 treesize of output 120 [2021-11-05 13:18:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:18:50,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:18:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:18:51,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913117862] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 13:18:51,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 13:18:51,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 16] total 41 [2021-11-05 13:18:51,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006384413] [2021-11-05 13:18:51,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 13:18:51,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-05 13:18:51,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:18:51,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-05 13:18:51,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1493, Unknown=0, NotChecked=0, Total=1640 [2021-11-05 13:18:51,017 INFO L87 Difference]: Start difference. First operand 386 states and 435 transitions. Second operand has 41 states, 41 states have (on average 4.585365853658536) internal successors, (188), 41 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) [2021-11-05 13:18:51,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:18:51,844 INFO L93 Difference]: Finished difference Result 476 states and 532 transitions. [2021-11-05 13:18:51,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-05 13:18:51,844 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.585365853658536) internal successors, (188), 41 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 [2021-11-05 13:18:51,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:18:51,845 INFO L225 Difference]: With dead ends: 476 [2021-11-05 13:18:51,845 INFO L226 Difference]: Without dead ends: 423 [2021-11-05 13:18:51,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1639.31ms TimeCoverageRelationStatistics Valid=256, Invalid=2606, Unknown=0, NotChecked=0, Total=2862 [2021-11-05 13:18:51,846 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 223 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 235.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 1834 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.64ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 271.92ms IncrementalHoareTripleChecker+Time [2021-11-05 13:18:51,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 1834 Invalid, 719 Unknown, 0 Unchecked, 2.64ms Time], IncrementalHoareTripleChecker [31 Valid, 425 Invalid, 0 Unknown, 263 Unchecked, 271.92ms Time] [2021-11-05 13:18:51,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-05 13:18:51,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 391. [2021-11-05 13:18:51,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 389 states have (on average 1.1336760925449871) internal successors, (441), 390 states have internal predecessors, (441), 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) [2021-11-05 13:18:51,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 441 transitions. [2021-11-05 13:18:51,879 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 441 transitions. Word has length 85 [2021-11-05 13:18:51,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:18:51,880 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 441 transitions. [2021-11-05 13:18:51,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.585365853658536) internal successors, (188), 41 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) [2021-11-05 13:18:51,880 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 441 transitions. [2021-11-05 13:18:51,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-05 13:18:51,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:18:51,881 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] [2021-11-05 13:18:51,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-05 13:18:52,103 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,SelfDestructingSolverStorable31 [2021-11-05 13:18:52,106 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)] === [2021-11-05 13:18:52,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:18:52,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1737263547, now seen corresponding path program 1 times [2021-11-05 13:18:52,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:18:52,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12486559] [2021-11-05 13:18:52,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:18:52,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:18:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:18:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:18:52,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:18:52,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12486559] [2021-11-05 13:18:52,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12486559] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:18:52,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417245054] [2021-11-05 13:18:52,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:18:52,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:18:52,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:18:52,404 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) [2021-11-05 13:18:52,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-05 13:18:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:18:52,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-05 13:18:52,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:18:52,553 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-05 13:18:52,554 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 63 treesize of output 50 [2021-11-05 13:18:52,568 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-05 13:18:52,568 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 71 treesize of output 54 [2021-11-05 13:18:56,214 INFO L354 Elim1Store]: treesize reduction 66, result has 17.5 percent of original size [2021-11-05 13:18:56,214 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 71 [2021-11-05 13:18:56,242 INFO L354 Elim1Store]: treesize reduction 22, result has 64.5 percent of original size [2021-11-05 13:18:56,242 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 77 [2021-11-05 13:18:56,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:18:56,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:18:56,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 13:18:56,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417245054] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 13:18:56,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 13:18:56,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 12] total 38 [2021-11-05 13:18:56,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614061445] [2021-11-05 13:18:56,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 13:18:56,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-05 13:18:56,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:18:56,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-05 13:18:56,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2021-11-05 13:18:56,888 INFO L87 Difference]: Start difference. First operand 391 states and 441 transitions. Second operand has 38 states, 38 states have (on average 6.0) internal successors, (228), 38 states have internal predecessors, (228), 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) [2021-11-05 13:18:57,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:18:57,251 INFO L93 Difference]: Finished difference Result 497 states and 549 transitions. [2021-11-05 13:18:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-05 13:18:57,252 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 6.0) internal successors, (228), 38 states have internal predecessors, (228), 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 [2021-11-05 13:18:57,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:18:57,253 INFO L225 Difference]: With dead ends: 497 [2021-11-05 13:18:57,253 INFO L226 Difference]: Without dead ends: 441 [2021-11-05 13:18:57,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 2385.88ms TimeCoverageRelationStatistics Valid=220, Invalid=1850, Unknown=0, NotChecked=0, Total=2070 [2021-11-05 13:18:57,254 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 274 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 106.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.75ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 125.07ms IncrementalHoareTripleChecker+Time [2021-11-05 13:18:57,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 1245 Invalid, 337 Unknown, 0 Unchecked, 1.75ms Time], IncrementalHoareTripleChecker [15 Valid, 215 Invalid, 0 Unknown, 107 Unchecked, 125.07ms Time] [2021-11-05 13:18:57,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-11-05 13:18:57,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 372. [2021-11-05 13:18:57,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 370 states have (on average 1.1216216216216217) internal successors, (415), 371 states have internal predecessors, (415), 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) [2021-11-05 13:18:57,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 415 transitions. [2021-11-05 13:18:57,284 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 415 transitions. Word has length 85 [2021-11-05 13:18:57,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:18:57,284 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 415 transitions. [2021-11-05 13:18:57,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 6.0) internal successors, (228), 38 states have internal predecessors, (228), 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) [2021-11-05 13:18:57,285 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 415 transitions. [2021-11-05 13:18:57,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-05 13:18:57,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:18:57,285 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:18:57,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-05 13:18:57,496 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,SelfDestructingSolverStorable32 [2021-11-05 13:18:57,496 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)] === [2021-11-05 13:18:57,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:18:57,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1881366369, now seen corresponding path program 1 times [2021-11-05 13:18:57,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:18:57,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895771757] [2021-11-05 13:18:57,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:18:57,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:18:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:18:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-05 13:18:57,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:18:57,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895771757] [2021-11-05 13:18:57,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895771757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:18:57,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86894073] [2021-11-05 13:18:57,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:18:57,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:18:57,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:18:57,648 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) [2021-11-05 13:18:57,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-05 13:18:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:18:57,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-05 13:18:57,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:18:57,825 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-05 13:18:57,825 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 63 treesize of output 58 [2021-11-05 13:18:57,834 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-05 13:18:57,834 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 73 treesize of output 54 [2021-11-05 13:19:01,073 INFO L354 Elim1Store]: treesize reduction 52, result has 35.0 percent of original size [2021-11-05 13:19:01,073 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 93 [2021-11-05 13:19:01,148 INFO L354 Elim1Store]: treesize reduction 50, result has 65.8 percent of original size [2021-11-05 13:19:01,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 81 treesize of output 144 [2021-11-05 13:19:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-05 13:19:01,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:19:02,020 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 959 treesize of output 943 [2021-11-05 13:19:02,359 INFO L354 Elim1Store]: treesize reduction 305, result has 38.8 percent of original size [2021-11-05 13:19:02,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 29 case distinctions, treesize of input 7101 treesize of output 6563 [2021-11-05 13:19:02,493 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-11-05 13:19:02,493 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 6292 treesize of output 5666 [2021-11-05 13:19:14,223 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 21 treesize of output 15 [2021-11-05 13:19:14,283 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 [2021-11-05 13:19:14,418 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 15 treesize of output 11 [2021-11-05 13:19:14,504 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 22 treesize of output 16 [2021-11-05 13:19:14,553 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 21 treesize of output 15 [2021-11-05 13:19:15,027 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 [2021-11-05 13:19:15,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-05 13:19:15,247 INFO L354 Elim1Store]: treesize reduction 26, result has 67.1 percent of original size [2021-11-05 13:19:15,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 300 [2021-11-05 13:19:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-05 13:19:16,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86894073] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 13:19:16,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 13:19:16,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 36 [2021-11-05 13:19:16,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208858484] [2021-11-05 13:19:16,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 13:19:16,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-05 13:19:16,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:19:16,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-05 13:19:16,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-11-05 13:19:16,210 INFO L87 Difference]: Start difference. First operand 372 states and 415 transitions. Second operand has 36 states, 36 states have (on average 5.5) internal successors, (198), 36 states have internal predecessors, (198), 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) [2021-11-05 13:19:22,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:19:22,744 INFO L93 Difference]: Finished difference Result 616 states and 695 transitions. [2021-11-05 13:19:22,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-05 13:19:22,745 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.5) internal successors, (198), 36 states have internal predecessors, (198), 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 87 [2021-11-05 13:19:22,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:19:22,746 INFO L225 Difference]: With dead ends: 616 [2021-11-05 13:19:22,746 INFO L226 Difference]: Without dead ends: 532 [2021-11-05 13:19:22,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 160 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 8257.63ms TimeCoverageRelationStatistics Valid=374, Invalid=2596, Unknown=0, NotChecked=0, Total=2970 [2021-11-05 13:19:22,748 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 463 mSDsluCounter, 1961 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 357.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 2095 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.42ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 418.59ms IncrementalHoareTripleChecker+Time [2021-11-05 13:19:22,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 2095 Invalid, 1105 Unknown, 0 Unchecked, 3.42ms Time], IncrementalHoareTripleChecker [33 Valid, 817 Invalid, 0 Unknown, 255 Unchecked, 418.59ms Time] [2021-11-05 13:19:22,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-11-05 13:19:22,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 377. [2021-11-05 13:19:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 375 states have (on average 1.12) internal successors, (420), 376 states have internal predecessors, (420), 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) [2021-11-05 13:19:22,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 420 transitions. [2021-11-05 13:19:22,779 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 420 transitions. Word has length 87 [2021-11-05 13:19:22,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:19:22,779 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 420 transitions. [2021-11-05 13:19:22,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.5) internal successors, (198), 36 states have internal predecessors, (198), 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) [2021-11-05 13:19:22,779 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 420 transitions. [2021-11-05 13:19:22,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-05 13:19:22,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:19:22,780 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:19:22,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-05 13:19:22,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-05 13:19:22,992 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)] === [2021-11-05 13:19:22,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:19:22,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1393938504, now seen corresponding path program 1 times [2021-11-05 13:19:22,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:19:22,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496736462] [2021-11-05 13:19:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:19:22,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:19:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:19:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-05 13:19:23,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:19:23,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496736462] [2021-11-05 13:19:23,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496736462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:19:23,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:19:23,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-05 13:19:23,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912878401] [2021-11-05 13:19:23,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:19:23,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-05 13:19:23,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:19:23,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-05 13:19:23,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-05 13:19:23,049 INFO L87 Difference]: Start difference. First operand 377 states and 420 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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) [2021-11-05 13:19:23,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:19:23,122 INFO L93 Difference]: Finished difference Result 425 states and 472 transitions. [2021-11-05 13:19:23,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-05 13:19:23,122 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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 93 [2021-11-05 13:19:23,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:19:23,123 INFO L225 Difference]: With dead ends: 425 [2021-11-05 13:19:23,123 INFO L226 Difference]: Without dead ends: 280 [2021-11-05 13:19:23,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.98ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-05 13:19:23,124 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 110 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.53ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.34ms IncrementalHoareTripleChecker+Time [2021-11-05 13:19:23,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 552 Invalid, 83 Unknown, 0 Unchecked, 0.53ms Time], IncrementalHoareTripleChecker [14 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 34.34ms Time] [2021-11-05 13:19:23,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-05 13:19:23,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 249. [2021-11-05 13:19:23,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 247 states have (on average 1.1093117408906883) internal successors, (274), 248 states have internal predecessors, (274), 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) [2021-11-05 13:19:23,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 274 transitions. [2021-11-05 13:19:23,145 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 274 transitions. Word has length 93 [2021-11-05 13:19:23,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:19:23,146 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 274 transitions. [2021-11-05 13:19:23,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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) [2021-11-05 13:19:23,146 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 274 transitions. [2021-11-05 13:19:23,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-05 13:19:23,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:19:23,146 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] [2021-11-05 13:19:23,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-05 13:19:23,147 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)] === [2021-11-05 13:19:23,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:19:23,147 INFO L85 PathProgramCache]: Analyzing trace with hash -86539151, now seen corresponding path program 2 times [2021-11-05 13:19:23,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:19:23,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027200536] [2021-11-05 13:19:23,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:19:23,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:19:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:19:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-05 13:19:23,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:19:23,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027200536] [2021-11-05 13:19:23,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027200536] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:19:23,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633568499] [2021-11-05 13:19:23,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-05 13:19:23,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:19:23,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:19:23,594 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 13:19:23,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-05 13:19:23,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-05 13:19:23,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 13:19:23,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 119 conjunts are in the unsatisfiable core [2021-11-05 13:19:23,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:19:23,801 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-05 13:19:23,802 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 63 treesize of output 58 [2021-11-05 13:19:23,809 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-05 13:19:23,810 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 73 treesize of output 54 [2021-11-05 13:19:34,892 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-05 13:19:34,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:19:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-05 13:19:36,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633568499] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-05 13:19:36,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-05 13:19:36,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [22, 23] total 55 [2021-11-05 13:19:36,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597017803] [2021-11-05 13:19:36,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:19:36,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-05 13:19:36,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:19:36,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-05 13:19:36,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2805, Unknown=0, NotChecked=0, Total=2970 [2021-11-05 13:19:36,026 INFO L87 Difference]: Start difference. First operand 249 states and 274 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 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) [2021-11-05 13:19:37,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:19:37,507 INFO L93 Difference]: Finished difference Result 430 states and 473 transitions. [2021-11-05 13:19:37,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-05 13:19:37,508 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 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 [2021-11-05 13:19:37,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:19:37,509 INFO L225 Difference]: With dead ends: 430 [2021-11-05 13:19:37,509 INFO L226 Difference]: Without dead ends: 382 [2021-11-05 13:19:37,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 11132.24ms TimeCoverageRelationStatistics Valid=611, Invalid=5241, Unknown=0, NotChecked=0, Total=5852 [2021-11-05 13:19:37,511 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 1078 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 311.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.81ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 365.45ms IncrementalHoareTripleChecker+Time [2021-11-05 13:19:37,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1078 Valid, 888 Invalid, 714 Unknown, 0 Unchecked, 2.81ms Time], IncrementalHoareTripleChecker [68 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 365.45ms Time] [2021-11-05 13:19:37,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-05 13:19:37,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 252. [2021-11-05 13:19:37,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 250 states have (on average 1.108) internal successors, (277), 251 states have internal predecessors, (277), 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) [2021-11-05 13:19:37,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 277 transitions. [2021-11-05 13:19:37,536 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 277 transitions. Word has length 95 [2021-11-05 13:19:37,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:19:37,536 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 277 transitions. [2021-11-05 13:19:37,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 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) [2021-11-05 13:19:37,537 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 277 transitions. [2021-11-05 13:19:37,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-05 13:19:37,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:19:37,537 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] [2021-11-05 13:19:37,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-05 13:19:37,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-05 13:19:37,748 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:19:37,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:19:37,748 INFO L85 PathProgramCache]: Analyzing trace with hash -895885777, now seen corresponding path program 1 times [2021-11-05 13:19:37,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:19:37,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363221229] [2021-11-05 13:19:37,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:19:37,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:19:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:19:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-05 13:19:37,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:19:37,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363221229] [2021-11-05 13:19:37,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363221229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:19:37,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121128280] [2021-11-05 13:19:37,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:19:37,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:19:37,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:19:37,964 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 13:19:37,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-05 13:19:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:19:38,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-05 13:19:38,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:19:38,152 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-05 13:19:38,152 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 63 treesize of output 58 [2021-11-05 13:19:38,160 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-05 13:19:38,161 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 73 treesize of output 54 [2021-11-05 13:19:41,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-05 13:19:41,831 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 112 [2021-11-05 13:19:41,847 INFO L354 Elim1Store]: treesize reduction 14, result has 62.2 percent of original size [2021-11-05 13:19:41,847 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 98 [2021-11-05 13:19:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-05 13:19:41,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 13:19:41,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121128280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:19:41,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-05 13:19:41,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [15] total 28 [2021-11-05 13:19:41,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937555511] [2021-11-05 13:19:41,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:19:41,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-05 13:19:41,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:19:41,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-05 13:19:41,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2021-11-05 13:19:41,883 INFO L87 Difference]: Start difference. First operand 252 states and 277 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 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) [2021-11-05 13:19:41,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:19:41,975 INFO L93 Difference]: Finished difference Result 317 states and 354 transitions. [2021-11-05 13:19:41,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-05 13:19:41,975 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 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 95 [2021-11-05 13:19:41,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:19:41,976 INFO L225 Difference]: With dead ends: 317 [2021-11-05 13:19:41,976 INFO L226 Difference]: Without dead ends: 252 [2021-11-05 13:19:41,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1777.27ms TimeCoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2021-11-05 13:19:41,977 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 23 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.72ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 38.54ms IncrementalHoareTripleChecker+Time [2021-11-05 13:19:41,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 890 Invalid, 239 Unknown, 0 Unchecked, 0.72ms Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 211 Unchecked, 38.54ms Time] [2021-11-05 13:19:41,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-05 13:19:41,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2021-11-05 13:19:41,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 250 states have (on average 1.104) internal successors, (276), 251 states have internal predecessors, (276), 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) [2021-11-05 13:19:42,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 276 transitions. [2021-11-05 13:19:42,001 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 276 transitions. Word has length 95 [2021-11-05 13:19:42,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:19:42,002 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 276 transitions. [2021-11-05 13:19:42,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 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) [2021-11-05 13:19:42,002 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 276 transitions. [2021-11-05 13:19:42,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-05 13:19:42,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:19:42,003 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:19:42,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-05 13:19:42,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:19:42,205 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:19:42,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:19:42,206 INFO L85 PathProgramCache]: Analyzing trace with hash 353638822, now seen corresponding path program 1 times [2021-11-05 13:19:42,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:19:42,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191919362] [2021-11-05 13:19:42,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:19:42,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:19:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:19:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-05 13:19:42,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:19:42,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191919362] [2021-11-05 13:19:42,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191919362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:19:42,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:19:42,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-05 13:19:42,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425541858] [2021-11-05 13:19:42,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:19:42,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-05 13:19:42,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:19:42,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-05 13:19:42,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-05 13:19:42,341 INFO L87 Difference]: Start difference. First operand 252 states and 276 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 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) [2021-11-05 13:19:42,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:19:42,505 INFO L93 Difference]: Finished difference Result 256 states and 279 transitions. [2021-11-05 13:19:42,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-05 13:19:42,505 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 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 96 [2021-11-05 13:19:42,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:19:42,506 INFO L225 Difference]: With dead ends: 256 [2021-11-05 13:19:42,506 INFO L226 Difference]: Without dead ends: 252 [2021-11-05 13:19:42,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 83.81ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-05 13:19:42,508 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 263 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.71ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.75ms IncrementalHoareTripleChecker+Time [2021-11-05 13:19:42,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 260 Invalid, 153 Unknown, 0 Unchecked, 0.71ms Time], IncrementalHoareTripleChecker [16 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 81.75ms Time] [2021-11-05 13:19:42,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-05 13:19:42,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2021-11-05 13:19:42,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 250 states have (on average 1.096) internal successors, (274), 251 states have internal predecessors, (274), 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) [2021-11-05 13:19:42,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 274 transitions. [2021-11-05 13:19:42,532 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 274 transitions. Word has length 96 [2021-11-05 13:19:42,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:19:42,532 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 274 transitions. [2021-11-05 13:19:42,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 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) [2021-11-05 13:19:42,533 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 274 transitions. [2021-11-05 13:19:42,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-05 13:19:42,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:19:42,533 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 13:19:42,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-05 13:19:42,534 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:19:42,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:19:42,534 INFO L85 PathProgramCache]: Analyzing trace with hash 2130493226, now seen corresponding path program 1 times [2021-11-05 13:19:42,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:19:42,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910852736] [2021-11-05 13:19:42,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:19:42,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:19:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:19:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-05 13:19:42,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:19:42,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910852736] [2021-11-05 13:19:42,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910852736] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 13:19:42,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 13:19:42,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-05 13:19:42,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260862606] [2021-11-05 13:19:42,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 13:19:42,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-05 13:19:42,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 13:19:42,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-05 13:19:42,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-05 13:19:42,717 INFO L87 Difference]: Start difference. First operand 252 states and 274 transitions. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 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) [2021-11-05 13:19:42,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 13:19:42,908 INFO L93 Difference]: Finished difference Result 259 states and 280 transitions. [2021-11-05 13:19:42,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-05 13:19:42,909 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 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 96 [2021-11-05 13:19:42,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 13:19:42,910 INFO L225 Difference]: With dead ends: 259 [2021-11-05 13:19:42,910 INFO L226 Difference]: Without dead ends: 252 [2021-11-05 13:19:42,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 109.39ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-05 13:19:42,911 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 291 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 89.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.97ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 108.07ms IncrementalHoareTripleChecker+Time [2021-11-05 13:19:42,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 343 Invalid, 228 Unknown, 0 Unchecked, 0.97ms Time], IncrementalHoareTripleChecker [28 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 108.07ms Time] [2021-11-05 13:19:42,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-05 13:19:42,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2021-11-05 13:19:42,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 250 states have (on average 1.088) internal successors, (272), 251 states have internal predecessors, (272), 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) [2021-11-05 13:19:42,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 272 transitions. [2021-11-05 13:19:42,934 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 272 transitions. Word has length 96 [2021-11-05 13:19:42,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 13:19:42,935 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 272 transitions. [2021-11-05 13:19:42,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 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) [2021-11-05 13:19:42,935 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 272 transitions. [2021-11-05 13:19:42,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-05 13:19:42,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 13:19:42,936 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, 1, 1] [2021-11-05 13:19:42,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-05 13:19:42,936 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-05 13:19:42,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 13:19:42,936 INFO L85 PathProgramCache]: Analyzing trace with hash -446690621, now seen corresponding path program 1 times [2021-11-05 13:19:42,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 13:19:42,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058534443] [2021-11-05 13:19:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:19:42,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 13:19:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:19:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-05 13:19:43,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 13:19:43,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058534443] [2021-11-05 13:19:43,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058534443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 13:19:43,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327333951] [2021-11-05 13:19:43,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 13:19:43,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 13:19:43,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 13:19:43,632 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 13:19:43,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-05 13:19:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 13:19:43,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 165 conjunts are in the unsatisfiable core [2021-11-05 13:19:43,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 13:19:43,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-05 13:19:43,861 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 29 treesize of output 17 [2021-11-05 13:19:43,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-05 13:19:43,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-05 13:19:43,868 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 29 treesize of output 17 [2021-11-05 13:19:43,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-05 13:19:43,986 INFO L354 Elim1Store]: treesize reduction 192, result has 14.3 percent of original size [2021-11-05 13:19:43,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 169 treesize of output 117 [2021-11-05 13:19:43,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-05 13:19:44,008 INFO L354 Elim1Store]: treesize reduction 164, result has 16.3 percent of original size [2021-11-05 13:19:44,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 140 treesize of output 101 [2021-11-05 13:19:47,423 INFO L354 Elim1Store]: treesize reduction 142, result has 2.1 percent of original size [2021-11-05 13:19:47,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 260 treesize of output 136 [2021-11-05 13:19:47,434 INFO L354 Elim1Store]: treesize reduction 94, result has 3.1 percent of original size [2021-11-05 13:19:47,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 97 treesize of output 47 [2021-11-05 13:19:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-05 13:19:47,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 13:19:55,540 WARN L230 SmtUtils]: Spent 6.62s on a formula simplification. DAG size of input: 663 DAG size of output: 323 [2021-11-05 13:19:55,541 INFO L354 Elim1Store]: treesize reduction 23607, result has 25.0 percent of original size [2021-11-05 13:19:55,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 1 disjoint index pairs (out of 91 index pairs), introduced 21 new quantified variables, introduced 108 case distinctions, treesize of input 50743381 treesize of output 47059832 [2021-11-05 13:23:29,840 WARN L230 SmtUtils]: Spent 3.57m on a formula simplification. DAG size of input: 2198 DAG size of output: 2170 [2021-11-05 13:23:38,019 WARN L230 SmtUtils]: Spent 8.17s on a formula simplification that was a NOOP. DAG size: 2115 Killed by 15